Ram B1500, B2500, B3500, 1999-2003

What To Do When There Are No DTCs 1

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Do not attempt to diagnose a Drivability Symptoms without having a logical plan to use to determine which Engine Control system is the cause of the symptom - this plan should include a way to determine which systems do not have a problem! Drivability symptom diagnosis is a part of an organized approach to problem solving and repair.

Do not attempt to diagnose a Drivability Symptoms without having a logical plan to use to determine which Engine Control system is the cause of the symptom - this plan should include a way to determine which systems do not have a problem! Drivability symptom diagnosis is a part of an organized approach to problem solving and repair.

Drivability Symptom Index Table



To use this list, locate the symptom that matches a particular problem and refer to the areas to test. The items listed under each symptom may not apply to all models, engines or vehicle systems. The repair steps indicate what vehicle component or system to test.


NOTE
The Drivability Symptoms in this list are intended to be generic. While they apply to most vehicles, some vehicles may not have all of the components listed. Refer to other Chilton repair manuals and electronic media for specific tests.

Symptom Test Table

Symptom DescriptionSuggested Areas to Test
Test 1 - No Start, Hard Start Condition · No Crank · Hard Start, Long Crank, Erratic Crank · Stall After Start · No Start, Normal Crank · No Start, MIL is off (if the VREF shorts to ground)- Check battery, battery circuits to starter - Check for a damaged flywheel, engine compression, base timing and minimum air rate - Check for a failed fuel pump relay - Check for distributor rotor "punch-through" - Check for a faulty ignition control module (ICM) - Check for a VREF circuit shorted to ground - Check SKIM (security system) with a Scan Tool
Test 2 - Rough Idle or Stalls Condition · Low or slow idle speed · Fast idle speed · Hunting or rolling idle speed · Slow return to idle speed · Stalls or almost stalls- Check for engine vacuum leaks - Check the condition of the PCV valve and lines - Check for excessive carbon buildup - Check for a restricted exhaust (in Section 2) - Check base idle speed, check for low fuel pressure - Check the throttle linkage for sticking or binding
Test 3 - Runs Rough Condition · At idle speed · During acceleration · At cruise speed · During deceleration- Check for engine vacuum leaks at intake manifold - Check condition of ignition secondary components - Check base timing and idle speed settings - Check for low or high fuel pressure - Check for dirty, leaking or shorted fuel injectors - Check for excessive carbon buildup on valves
Test 4 - Cuts-out, Misses Condition · At idle speed · During acceleration · At cruise speed · During deceleration- Check for engine vacuum leaks at intake manifold - Check condition of ignition secondary components - Check that spark timing advance is available - Check for low or high fuel pressure - Check for dirty, leaking or shorted fuel injectors - Check for excessive carbon buildup on valves
Test 5 - Bucks, Jerks Condition · During acceleration · At cruise speed · During deceleration- Check for engine vacuum leaks at intake manifold - Check condition of ignition secondary components - Check that spark timing advance is available - Check for low or high fuel pressure - Check for dirty, leaking or shorted fuel injectors - Check operation of the TCC solenoid, brake switch

To use this list, locate the symptom that matches a particular problem and refer to the areas to test. The items listed under each symptom may not apply to all models, engines or vehicle systems. The repair steps indicate what vehicle component or system to test.


NOTE
The Drivability Symptoms in this list are intended to be generic. While they apply to most vehicles, some vehicles may not have all of the components listed. Refer to other Chilton repair manuals and electronic media for specific tests.

Symptom Test Table

Symptom DescriptionSuggested Areas to Test
Test 1 - No Start, Hard Start Condition No Crank Hard Start, Long Crank, Erratic Crank Stall After Start No Start, Normal Crank No Start, MIL is off (if the VREF shorts to ground)- Check battery, battery circuits to starter - Check for a damaged flywheel, engine compression, base timing and minimum air rate - Check for a failed fuel pump relay - Check for distributor rotor "punch-through" - Check for a faulty ignition control module (ICM) - Check for a VREF circuit shorted to ground - Check SKIM (security system) with a Scan Tool
Test 2 - Rough Idle or Stalls Condition Low or slow idle speed Fast idle speed Hunting or rolling idle speed Slow return to idle speed Stalls or almost stalls- Check for engine vacuum leaks - Check the condition of the PCV valve and lines - Check for excessive carbon buildup - Check for a restricted exhaust (in Section 2) - Check base idle speed, check for low fuel pressure - Check the throttle linkage for sticking or binding
Test 3 - Runs Rough Condition At idle speed During acceleration At cruise speed During deceleration- Check for engine vacuum leaks at intake manifold - Check condition of ignition secondary components - Check base timing and idle speed settings - Check for low or high fuel pressure - Check for dirty, leaking or shorted fuel injectors - Check for excessive carbon buildup on valves
Test 4 - Cuts-out, Misses Condition At idle speed During acceleration At cruise speed During deceleration- Check for engine vacuum leaks at intake manifold - Check condition of ignition secondary components - Check that spark timing advance is available - Check for low or high fuel pressure - Check for dirty, leaking or shorted fuel injectors - Check for excessive carbon buildup on valves
Test 5 - Bucks, Jerks Condition During acceleration At cruise speed During deceleration- Check for engine vacuum leaks at intake manifold - Check condition of ignition secondary components - Check that spark timing advance is available - Check for low or high fuel pressure - Check for dirty, leaking or shorted fuel injectors - Check operation of the TCC solenoid, brake switch

Other Diagnosis & Testing



1999 RAM Pickup & Van 3.9L VIN X 'C1' Black Connector
PCM Pin #Wire ColorCircuit Description (32-Pin)Value at Hot Idle
1, 3---Not Used---
2LG/BKIgnition Switch Power (B+)12-14v
4BK/LBSensor Ground  
5---Not Used---
6BK/WTPNP Switch Sense SignalIn P/N: 0v, Others: 5v
7BK/GYCoil 1 Driver Control5°, 55 mph: 8° dwell
8GY/BKCKP Sensor SignalDigital Signals: 0-5-0v
9---Not Used---
10YL/BKIAC 2 Driver ControlPulse Signals
11BR/WTIAC 3 Driver ControlPulse Signals
12---Not Used---
13ORPower Takeoff Switch SenseSwitch Off: 12v, On: 1v
14---Not Used---
15BK/RDIAT Sensor SignalAt 100°F: 1.83v
16TN/BKECT Sensor SignalAt 180°F: 2.80v
17PK/WT5-Volt Supply4.9-5.1v
18TN/YLCMP Sensor SignalDigital Signals: 0-5-0v
19GY/RDIAC 1 Driver ControlPulse Signals
20PK/BKIAC 4 Driver ControlPulse Signals
21---Not Used---
22RD/WTKeep Alive Power (B+)12-14v
23OR/DBTP Sensor Signal0.6-1.0v
24TN/WTHO2S-11 (B1 S1) Signal0.1-1.1v
25OR/BKHO2S-12 (B1 S2) Signal0.1-1.1v
26---Not Used---
27DG/RDMAP Sensor Signal1.5-1.6v
28-30---Not Used---
31BK/TNPower Ground  
32BK/TNPower Ground  



Click image to see an enlarged view

Fig.

1999 RAM Pickup & Van 3.9L VIN X 'C2' White Connector
PCM Pin #Wire ColorCircuit Description (32-Pin)Value at Hot Idle
1PKTransmission Temperature Sensor SignalAt 200°F: 2.40v
2-3---Not Used---
4WT/DBInjector 1 Driver1-4 ms
5YL/WTInjector 3 Driver1-4 ms
6GYInjector 5 Driver1-4 ms
7, 9---Not Used---
8PK/WGovernor Pressure SolenoidPWM Signal: 0-12-0v
10DGGenerator Field ControlDigital Signals: 0-12-0v
11OR/BKTCC Solenoid ControlAt Cruise w/TCC On: 1v
12BR/DBInjector 6 Driver1-4 ms
15TNInjector 2 Driver1-4 ms
16LB/BRInjector 4 Driver1-4 ms
21BROverdrive Solenoid ControlCruise w/solenoid On: 1v
23GY/OEngine Oil Pressure Sensor1.6v at 24 psi
25DB/BKOSS Sensor (-) SignalMoving: AC pulse signals
27WT/ORVehicle Speed SignalDigital Signal
28LG/BKOSS Sensor (+) SignalMoving: AC pulse signals
29LG/WTGovernor Pressure Sensor0.58v
30PTransmission Relay ControlRelay Off: 12v, On: 1v
31O5-Volt Supply4.9-5.1v
1999 RAM Pickup & Van 3.9L VIN X 'C3' Gray Connector
PCM Pin #Wire ColorCircuit Description (32-Pin)Value at Hot Idle
1DB/ORA/C Clutch Relay ControlRelay Off: 12v, On: 1v
3DB/YLASD Relay ControlRelay Off: 12v, On: 1v
4TN/RDSpeed Control Vacuum SolenoidVacuum Increasing: 1v
5LG/RDSpeed Control Vent SolenoidVacuum Decreasing: 1v
6 ('98)LG/OROverdrive Off Lamp ControlLamp Off: 12v, On: 1v
8BR/VTHO2S-11 (B1 S1) HeaterHeater Off: 12v, On: 1v
9DG/PKHO2S-12 (B1 S2) HeaterHeater Off: 12v, On: 1v
10WT/DGLDP Solenoid ControlPWM Signal: 0-12-0v
11YL/RDSpeed Control Power Supply12-14v
12DG/ORASD Relay Power (B+)12-14v
13OR/WTOverdrive Off Switch SenseSwitch Off: 12v, On: 1v
14ORLDP Switch Sense SignalLDP Switch Closed: 0v
15PK/YLBattery Temperature SensorAt 86°F: 1.96v
19BR/WTFuel Pump Relay ControlRelay Off: 12v, On: 1v
20PK/WTEVAP Purge Solenoid ControlPWM Signal: 0-12-0v
22BRA/C Switch SignalA/C Off: 12v, On: 1v
23LG/WTA/C Select SignalA/C Off: 12v, On: 1v
24WT/PKBrake Switch Sense SignalBrake Off: 0v, On: 12v
25DBGenerator Field Source12-14v
26DB/WTFuel Level Sensor SignalFull: 0.56v, 1/2 full: 2.5v
27PK/DBSCI Transmit Signal0v
28WT/BKCCD Bus (-) Signal  
29DGSCI Receive Signal5v
30VT/BRCCD Bus (+) SignalDigital Signals: 0-5-0v
32RD/LGSpeed Control Set Switch SignalS/C & Set Switch On: 3.8v
1999-2000 RAM Pickup & Van 5.2L Propane VIN 2 'A' Black Connector
PCM Pin #Wire ColorCircuit Description (32-Pin)Value at Hot Idle
1---Not Used---
2LG/BKIgnition Switch Power (B+)12-14v
3---Not Used---
4BK/LBSensor Ground  
5---Not Used---
6BR/YLPNP Switch Sense SignalIn P/N: 0v, Others: 5v
7GYCoil 1 Driver Control5°, 55 mph: 8° dwell
8GY/BKCKP Sensor SignalDigital Signals: 0-5-0v
9---Not Used---
10YL/BKIAC 2 Driver ControlPulse Signals
11BR/WTIAC 1 Driver ControlPulse Signals
12-14---Not Used---
15BK/RDIAT Sensor SignalAt 100°F: 1.83v
16TN/BKECT Sensor SignalAt 180°F: 2.80v
17OR5-Volt Supply4.9-5.1v
18TN/YLCMP Sensor SignalDigital Signals: 0-5-0v
19GY/RDIAC 3 Driver ControlPulse Signals
20VT/BKIAC 4 Driver ControlPulse Signals
21---Not Used---
22RD/WTKeep Alive Power (B+)12-14v
22 ('01)RD/WTKeep Alive Power (B+)12-14v
23OR/DBTP Sensor Signal0.6-1.0v
24BK/DGHO2S-11 (B1 S1) Signal0.1-1.1v
25TN/WTHO2S-12 (B1 S2) Signal0.1-1.1v
26---Not Used---
27DG/RDMAP Sensor Signal1.5-1.6v
28DG/ORFuel Pressure Sensor0.5-4.5v
29-30---Not Used---
31BK/TNPower Ground  
32BK/TNPower Ground  



Click image to see an enlarged view

Fig.

1999-2000 RAM Pickup & Van 5.2L Propane VIN 2 'B' White Connector
PCM Pin #Wire ColorCircuit Description (32-Pin)Value at Hot Idle
1GY/BKTransmission Temperature Sensor SignalAt 200°F: 2.40v
2VTInjector 7 Driver1-4 ms
4WT/DBInjector 1 Driver1-4 ms
5YL/WTInjector 3 Driver1-4 ms
6GYInjector 5 Driver1-4 ms
8VT/WTGovernor Pressure SolenoidPWM Signal: 0-12-0v
10DG/WTGenerator Field ControlDigital Signals: 0-12-0v
11OR/BKTCC Solenoid ControlAt Cruise w/TCC On: 1v
12BR/DBInjector 6 Driver1-4 ms
13GY/LBInjector 8 Driver1-4 ms
15TNInjector 2 Driver1-4 ms
16LB/BRInjector 4 Driver1-4 ms
17-20, 24---Not Used---
21BR3-4 Shift Solenoid ControlSolenoid Off: 12v, On: 1v
22TN/PKFuel Temperature Sensor0.5-4.5v
23GY/YLEngine Oil Pressure Sensor1.6v at 24 psi
25, 28DB, LGOSS Sensor (-), (+) SignalsMoving: AC pulse signals
27WT/ORVehicle Speed SignalDigital Signal
29LG/RDGovernor Pressure Sensor0.58v
30PKTransmission Relay ControlRelay Off: 12v, On: 1v
31VT/WT5-Volt Supply4.9-5.1v
1999-2000 RAM Pickup & Van 5.2L Propane VIN 2 'C' Gray Connector
PCM Pin #Wire ColorCircuit Description (32-Pin)Value at Hot Idle
1DB/ORA/C Clutch Relay ControlRelay Off: 12v, On: 1v
3DB/YLASD Relay ControlRelay Off: 12v, On: 1v
4TN/RDSpeed Control Vacuum SolenoidVacuum Increasing: 1v
5LG/RDSpeed Control Vent SolenoidVacuum Decreasing: 1v
8OR/RDHO2S-11 (B1 S1) HeaterPWM Signal: 0-12-0v
9BK/ORHO2S-11 Heater Relay (Cal)Heater Off: 12v, On: 1v
10WT/DGLDP Solenoid ControlPWM Signal: 0-12-0v
11YL/RDSpeed Control Power Supply12-14v
12DG/ORASD Relay Power (B+)12-14v
13OR/WTOverdrive Off Switch SenseSwitch Off: 12v, On: 1v
15PK/YLBattery Temperature SensorAt 86°F: 1.96v
16VT/TNHO2S-21 (B2 S1) HeaterPWM Signal: 0-12-0v
19BRHigh Pressure Fuel Shutoff RelayRelay Off: 12v, On: 1v
20PK/BKEVAP Purge Solenoid ControlPWM Signal: 0-12-0v
22DBA/C Pressure Switch SignalA/C On: 0.451-4.850v
23LG/GYA/C Select SignalA/C Off: 12v, On: 1v
24WT/PKBrake Switch Sense SignalBrake Off: 0v, On: 12v
25WT/DBGenerator Field Source12-14v
26DBFuel Level Sensor SignalFull: 0.56v, 1/2 full: 2.5v
27PKSCI Transmit Signal0v
28WT/BKCCD Bus (-) Signal  
29LGSCI Receive Signal5v
30VT/BRCCD Bus (+) SignalDigital Signals: 0-5-0v
32WT/LGSpeed Control Set Switch SignalS/C & Set Switch On: 3.8v
1999-2000 RAM Van 5.9L VIN Z 'C1' Black Connector
PCM Pin #Wire ColorCircuit Description (32-Pin)Value at Hot Idle
2LG/BKIgnition Switch Power (B+)12-14v
4BK/LBSensor Ground  
6BK/WTPNP Switch Sense SignalIn P/N: 0v, Others: 5v
6 ('00)BR/YLPNP Switch Sense SignalIn P/N: 0v, Others: 5v
7GYCoil 1 Driver Control5°, 55 mph: 8° dwell
8GY/BKCKP Sensor SignalDigital Signals: 0-5-0v
10YL/BKIAC 2 Driver ControlPulse Signals
11BR/WTIAC 1 Driver ControlPulse Signals
15BK/RDIAT Sensor SignalAt 100°F: 1.83v
16TN/BKECT Sensor SignalAt 180°F: 2.80v
17OR5-Volt Supply4.9-5.1v
18TN/YLCMP Sensor SignalDigital Signals: 0-5-0v
19GY/RDIAC 3 Driver ControlPulse Signals
20PK/BKIAC 4 Driver ControlPulse Signals
22RD/WTKeep Alive Power (B+)12-14v
23OR/DBTP Sensor Signal0.6-1.0v
24TN/WTHO2S-11 (B1 S1) Signal0.1-1.1v
25BK/DGHO2S-12 (B1 S2) Signal0.1-1.1v
27DG/RDMAP Sensor Signal1.5-1.6v
31-32BK/TNPower Ground  
1999-2000 RAM Van 5.9L VIN Z 'C3' Gray Connector
PCM Pin #Wire ColorCircuit Description (32-Pin)Value at Hot Idle
1DB/ORA/C Clutch Relay ControlRelay Off: 12v, On: 1v
2---Not Used---
3DB/YLASD Relay ControlRelay Off: 12v, On: 1v
4TN/RDSpeed Control Vacuum SolenoidVacuum Increasing: 1v
5LG/RDSpeed Control Vent SolenoidVacuum Decreasing: 1v
6 ('98)LG/OROverdrive Off Lamp ControlLamp Off: 12v, On: 1v
7-9---Not Used---
10WT/DGLDP Solenoid ControlPWM Signal: 0-12-0v
11YL/RDSpeed Control Power Supply12-14v
12DG/ORASD Relay Power (B+)12-14v
13OR/WTOverdrive Off Switch SenseSwitch Off: 12v, On: 1v
14ORLDP Switch Sense SignalLDP Switch Closed: 0v
15PK/YLBattery Temperature SensorAt 86°F: 1.96v
16-18---Not Used---
19BRFuel Pump Relay ControlRelay Off: 12v, On: 1v
20PK/WEVAP Purge Solenoid ControlPWM Signal: 0-12-0v
20 ('00)PK/BKEVAP Purge Solenoid ControlPWM Signal: 0-12-0v
21---Not Used---
22DBA/C Pressure Switch SignalA/C On: 0.451-4.850v
23LG/GYA/C Select SignalA/C Off: 12v, On: 1v
24WT/PKBrake Switch Sense SignalBrake Off: 0v, On: 12v
25OR/DBGenerator Field Source12-14v
25 ('00)WT/DBGenerator Field Source12-14v
26LB/BKFuel Level Sensor SignalFull: 0.56v, 1/2 full: 2.5v
27PKSCI Transmit0v
28WT/BKCCD Bus (-)  
29LG/WTSCI Receive5v
30PK/BRCCD Bus (+)Digital Signals: 0-5-0v
31---Not Used---
32WT/LGSpeed Control Set Switch SignalS/C & Set Switch On: 3.8v



Click image to see an enlarged view

Fig.

1999-2000 RAM Van 5.9L VIN Z White 'C2' Connector
PCM Pin #Wire ColorCircuit Description (32-Pin)Value at Hot Idle
1GY/BKTransmission Temperature Sensor SignalAt 200°F: 2.40v
2PKInjector 7 Driver1-4 ms
4WT/DBInjector 1 Driver1-4 ms
5YL/WTInjector 3 Driver1-4 ms
6GYInjector 5 Driver1-4 ms
8PK/WTGovernor Pressure SolenoidPWM Signal: 0-12-0v
10DG/WTGenerator Field ControlDigital Signals: 0-12-0v
11OR/BKTCC Solenoid ControlAt Cruise w/TCC On: 1v
12BR/DBInjector 6 Driver1-4 ms
13GY/LBInjector 8 Driver1-4 ms
15TNInjector 2 Driver1-4 ms
16LB/BRInjector 4 Driver1-4 ms
21OR/WTOverdrive Solenoid ControlCruise w/solenoid On: 1v
21 ('00)BROverdrive Solenoid ControlCruise w/solenoid On: 1v
23GYEngine Oil Pressure Sensor1.6v at 24 psi
25DB/BKOSS Sensor (-) SignalMoving: AC pulse signals
27WT/ORVehicle Speed SignalDigital Signal
28LG/WTOSS Sensor (+) SignalMoving: AC pulse signals
29LG/RDGovernor Pressure Sensor0.58v
30LB/PKTransmission Relay ControlRelay Off: 12v, On: 1v
31PK/WT5-Volt Supply4.9-5.1v
1999-2001 RAM Pickup & Van 5.2L VIN Y 'C2' White Connector
PCM Pin #Wire ColorCircuit Description (32-Pin)Value at Hot Idle
1VTTransmission Temperature Sensor SignalAt 200°F: 2.40v
2VT/TNInjector 7 Driver1-4 ms
4WT/DBInjector 1 Driver1-4 ms
5YL/WTInjector 3 Driver1-4 ms
6GYInjector 5 Driver1-4 ms
8VT/WTGovernor Pressure SolenoidPWM Signal: 0-12-0v
10DGGenerator Field ControlDigital Signals: 0-12-0v
11OR/BKTCC Solenoid ControlAt Cruise w/TCC On: 1v
12BR/DBInjector 6 Driver1-4 ms
13GY/LBInjector 8 Driver1-4 ms
15TNInjector 2 Driver1-4 ms
16LB/BRInjector 4 Driver1-4 ms
21BR3-4 Shift Solenoid ControlCruise w/solenoid On: 1v
23GY/OREngine Oil Pressure Sensor1.6v at 24 psi
25DB/BKOSS Sensor (-) SignalMoving: AC pulse signals
27WT/ORVehicle Speed SignalDigital Signal
28LG/BKOSS Sensor (+) SignalMoving: AC pulse signals
29LG/WTGovernor Pressure Sensor0.58v
30PKTransmission Relay ControlRelay Off: 12v, On: 1v
31OR5-Volt Supply4.9-5.1v
1999-2001 RAM Pickup & Van 5.2L VIN Y 'C3' Gray Connector
PCM Pin #Wire ColorCircuit Description (32-Pin)Value at Hot Idle
1DB/ORA/C Clutch Relay ControlRelay Off: 12v, On: 1v
3DB/YLASD Relay ControlRelay Off: 12v, On: 1v
4TN/RDSpeed Control Vacuum SolenoidVacuum Increasing: 1v
5LG/RDSpeed Control Vent SolenoidVacuum Decreasing: 1v
6 ('98)LG/OROverdrive Off Lamp ControlLamp Off: 12v, On: 1v
8BR/VTHO2S-11 Heater Control (Cal)PWM Signal: 0-12-0v
9DG/PKHO2S-12 Heater Relay (Cal)Relay Off: 12v, On: 1v
10WT/DGLDP Solenoid ControlPWM Signal: 0-12-0v
11YL/RDSpeed Control Power Supply12-14v
12DG/ORASD Relay Power (B+)12-14v
13OR/WTOverdrive Off Switch SenseSwitch Off: 12v, On: 1v
14ORLDP Switch Sense SignalLDP Switch Closed: 0v
15PK/YLBattery Temperature SensorAt 86°F: 1.96v
19BR/WTFuel Pump Relay ControlRelay Off: 12v, On: 1v
20PK/WTEVAP Purge Solenoid ControlPWM Signal: 0-12-0v
22BRA/C Switch SignalA/C Off: 12v, On: 1v
23LG/WTA/C Select SignalA/C Off: 12v, On: 1v
24WT/PKBrake Switch Sense SignalBrake Off: 0v, On: 12v
25DBGenerator Field Source12-14v
26DB/WTFuel Level Sensor SignalFull: 0.56v, 1/2 full: 2.5v
27PK/DBSCI Transmit Signal0v
28WT/BKCCD Bus (-) Signal  
29DGSCI Receive Signal5v
30VT/BRCCD Bus (+) SignalDigital Signals: 0-5-0v
32RD/LGSpeed Control Set Switch SignalS/C & Set Switch On: 3.8v
PCM Pin #Wire ColorCircuit Description (32-Pin)Value at Hot Idle
1DB/ORA/C Clutch Relay ControlRelay Off: 12v, On: 1v
2---Not Used---
3DB/YLASD Relay ControlRelay Off: 12v, On: 1v
4TN/RDSpeed Control Vacuum SolenoidVacuum Increasing: 1v
5LG/RDSpeed Control Vent SolenoidVacuum Decreasing: 1v
6 ('98)LG/OROverdrive Off Lamp ControlLamp Off: 12v, On: 1v
7---Not Used---
8BR/VTHO2S-11 Heater Control (Cal)Heater Off: 12v, On: 1v
9DG/PKHO2S-12 Heater Relay (Cal)Relay Off: 12v, On: 1v
10WT/ORLDP Solenoid ControlPWM Signal: 0-12-0v
10 ('00-'02)WT/DGLDP Solenoid ControlPWM Signal: 0-12-0v
11YL/RDSpeed Control Power Supply12-14v
12DG/ORASD Relay Power (B+)12-14v
13OR/WTOverdrive Off Switch SenseSwitch Off: 12v, On: 1v
14ORLDP Switch Sense SignalLDP Switch Closed: 0v
15PK/YLBattery Temperature SensorAt 86°F: 1.96v
16BR/WTHO2S-21 Heater ControlHeater Off: 12v, On: 1v
17-18---Not Used---
19BR/WTFuel Pump Relay ControlRelay Off: 12v, On: 1v
20PK/WTEVAP Purge Solenoid ControlPWM Signal: 0-12-0v
21---Not Used---
22BRA/C Switch SignalA/C Off: 12v, On: 1v
23LG/WTA/C Select SignalA/C Off: 12v, On: 1v
24WT/PKBrake Switch Sense SignalBrake Off: 0v, On: 12v
25DBGenerator Field Source12-14v
26DB/WTFuel Level Sensor SignalFull: 0.56v, 1/2 full: 2.5v
27PK/DBSCI Transmit Signal0v
28WT/BKCCD Bus (-) Signal  
29DGSCI Receive Signal5v
30VT/BRCCD Bus (+) SignalDigital Signals: 0-5-0v
31---Not Used---
32RD/LGSpeed Control Set Switch SignalS/C & Set Switch On: 3.8v



Click image to see an enlarged view

Fig.

1999-2002 RAM Pickup & Van 8.0L VIN W 'C1' Black Connector
PCM Pin #Wire ColorCircuit Description (32-Pin)Value at Hot Idle
1YL/GYCoil 4 Driver Control5°, 55 mph: 8° dwell
2LG/BKIgnition Switch Output (Run-Start)12-14v
3RD/BKCoil 3 Driver Control5°, 55 mph: 8° dwell
4BK/LBSensor Ground  
5DG/GYCoil 5 Driver Control5°, 55 mph: 8° dwell
6BK/WTPNP Switch Sense SignalIn P/N: 0v, Others: 5v
7BK/GYCoil 1 Driver Control5°, 55 mph: 8° dwell
8GY/BKCKP Sensor SignalDigital Signals: 0-5-0v
9DB/WTCoil 2 Driver Control5°, 55 mph: 8° dwell
10YL/BKIAC 2 Driver ControlPulse Signals
11BR/WTIAC 3 Driver ControlPulse Signals
12---Not Used---
13ORPower Takeoff Switch SenseSwitch Off: 12v, On: 1v
14---Not Used---
15BK/RDIAT Sensor SignalAt 100°F: 1.83v
16TN/BKECT Sensor SignalAt 180°F: 2.80v
17VT/WT5-Volt Supply4.9-5.1v
18TN/YLCMP Sensor SignalDigital Signals: 0-5-0v
19GY/RDIAC 1 Driver ControlPulse Signals
20VT/BKIAC 4 Driver ControlPulse Signals
21---Not Used---
22RD/WTKeep Alive Power (B+)12-14v
23OR/DBTP Sensor Signal0.6-1.0v
24BK/DGHO2S-11 (B1 S1) Signal0.1-1.1v
25OR/BKHO2S-13 (B1 S3) Signal0.1-1.1v
26LG/RDHO2S-12 (B1 S2) Signal0.1-1.1v
27DG/RDMAP Sensor Signal1.5-1.6v
28---Not Used---
29TN/RDHO2S-21 (B2 S1) Signal0.1-1.1v
29 ('00-'01)TN/WTHO2S-21 (B2 S1) Signal0.1-1.1v
30---Not Used---
31BK/TNPower Ground  
32BK/TNPower Ground  



Click image to see an enlarged view

Fig.

1999-2002 RAM Pickup & Van 8.0L VIN W 'C2' White Connector
PCM Pin #Wire ColorCircuit Description (32-Pin)Value at Hot Idle
1VTTransmission Temperature Sensor SignalAt 200°F: 2.40v
2VT/TNInjector 7 Driver1-4 ms
3TN/BKInjector 9 Driver1-4 ms
4WT/DBInjector 1 Driver1-4 ms
5YL/WTInjector 3 Driver1-4 ms
6GYInjector 5 Driver1-4 ms
7---Not Used---
8VT/WTGovernor Pressure SolenoidPWM Signal: 0-12-0v
9---Not Used---
10DGGenerator Field ControlDigital Signals: 0-12-0v
11OR/BKTCC Solenoid ControlAt Cruise w/TCC On: 1v
12BR/DBInjector 6 Driver1-4 ms
13GY/LBInjector 8 Driver1-4 ms
14WTInjector 10 Driver1-4 ms
15TNInjector 2 Driver1-4 ms
16LB/BRInjector 4 Driver1-4 ms
17-20---Not Used---
21BR3-4 Shift Solenoid ControlSolenoid Off: 12v, On: 1v
22---Not Used---
23GY/OREngine Oil Pressure Sensor1.6v at 24 psi
24---Not Used---
25DB/BKOSS Sensor (-) SignalMoving: AC pulse signals
26---Not Used---
27WT/ORVehicle Speed SignalDigital Signal
28LG/BKOSS Sensor (+) SignalMoving: AC pulse signals
29LG/WTGovernor Pressure Sensor0.58v
30PKTransmission Relay ControlRelay Off: 12v, On: 1v
31OR5-Volt Supply4.9-5.1v
32---Not Used---



Click image to see an enlarged view

Fig.

1999-2003 RAM Pickup & Van 5.2L Cng VIN T 'B' White Connector
PCM Pin #Wire ColorCircuit Description (32-Pin)Value at Hot Idle
1GY/BKTransmission Temperature Sensor SignalAt 200°F: 2.40v
2VTInjector 7 Driver1-4 ms
3, 7---Not Used---
4WT/DBInjector 1 Driver1-4 ms
5YL/WTInjector 3 Driver1-4 ms
6GYInjector 5 Driver1-4 ms
8VT/BKGovernor Pressure SolenoidPWM Signal: 0-12-0v
9, 14---Not Used---
10DG/WTGenerator Field ControlDigital Signals: 0-12-0v
11OR/BKTCC Solenoid ControlAt Cruise w/TCC On: 1v
12BR/DBInjector 6 Driver1-4 ms
13GY/LBInjector 8 Driver1-4 ms
15TNInjector 2 Driver1-4 ms
16LB/BRInjector 4 Driver1-4 ms
17-20---Not Used---
21BR3-4 Shift Solenoid ControlSolenoid Off: 12v, On: 1v
22TN/PKFuel Temperature Sensor0.5-4.5v
23GY/YLEngine Oil Pressure Sensor1.6v at 24 psi
24, 32---Not Used---
25DB/BKOSS Sensor (-) SignalsMoving: AC pulse signals
27WT/ORVehicle Speed SignalDigital Signals
28LG/WTOSS Sensor (+) SignalsMoving: AC pulse signals
29LG/RDGovernor Pressure Sensor0.58v
30PKTransmission Relay ControlRelay Off: 12v, On: 1v
31VT/WT5-Volt Supply4.9-5.1v
1999-2003 RAM Pickup & Van 5.2L Cng VIN T 'C' Gray Connector
PCM Pin #Wire ColorCircuit Description (32-Pin)Value at Hot Idle
1DB/ORA/C Clutch Relay ControlRelay Off: 12v, On: 1v
2---Not Used---
3DB/YLASD Relay ControlRelay Off: 12v, On: 1v
4TN/RDSpeed Control Vacuum SolenoidVacuum Increasing: 1v
5LG/RDSpeed Control Vent SolenoidVacuum Decreasing: 1v
8OR/RDHO2S-11 (B1 S1) HeaterPWM Signal: 0-12-0v
9---Not Used---
10WT/DGLDP Solenoid ControlPWM Signal: 0-12-0v
11YL/RDSpeed Control Power Supply12-14v
12DG/ORASD Relay Power (B+)12-14v
13OR/WTOverdrive Off Switch SenseSwitch Off: 12v, On: 1v
14ORLeak Detection Pump Switch SenseLDP Switch Closed: 0v
15PK/YLBattery Temperature SensorAt 86°F: 1.96v
16VT/TNHO2S-12 (B1 S2) HeaterPWM Signal: 0-12-0v
17-18, 20-21---Not Used---
19BRHigh Pressure Fuel Shutoff RelayRelay Off: 12v, On: 1v
22DBA/C Pressure Switch SignalA/C On: 0.451-4.850v
23LG/GYA/C Switch SenseA/C Off: 12v, On: 1v
24WT/PKBrake Switch SenseBrake Off: 0v, On: 12v
25WT/DBGenerator Field Source12-14v
26LB/BKFuel Level Sensor SignalFull: 0.56v, 1/2 full: 2.5v
27PKSCI Transmit0v
28WT/BKCCD Bus (-) Signal  
29LGSCI Receive5v
30VT/BRCCD Bus (+) SignalDigital Signals: 0-5-0v
31---Not Used---
32WT/LGSpeed Control Set Switch SignalS/C & Set Switch On: 3.8v
1999-2003 RAM Pickup & Van 5.2L V8 Ohv Cng VIN T 'A' Black Connector
PCM Pin #Wire ColorCircuit Description (32-Pin)Value at Hot Idle
1---Not Used---
2LG/BKIgnition Switch Power (B+)12-14v
3---Not Used---
4BK/LBSensor Ground  
5---Not Used---
6BR/YLPNP Switch Sense SignalIn P/N: 0v, Others: 5v
7GYCoil 1 Driver Control5°, 55 mph: 8° dwell
8GY/BKCKP Sensor SignalDigital Signals: 0-5-0v
9---Not Used---
10YL/BKIAC 2 Driver ControlPulse Signals
11BR/WTIAC 3 Driver ControlPulse Signals
12-14---Not Used---
15BK/RDIAT Sensor SignalAt 100°F: 1.83v
16TN/BKECT Sensor SignalAt 180°F: 2.80v
17OR5-Volt Supply4.9-5.1v
18TN/YLCMP Sensor SignalDigital Signals: 0-5-0v
19GY/RDIAC 1 Driver ControlPulse Signals
20VT/BKIAC 4 Driver ControlPulse Signals
21---Not Used---
22RD/WTKeep Alive Power (B+)12-14v
23OR/DBTP Sensor Signal0.6-1.0v
24BK/DGHO2S-11 (B1 S1) Signal0.1-1.1v
25TN/WTHO2S-12 (B1 S2) Signal0.1-1.1v
26---Not Used---
27DG/RDMAP Sensor Signal1.5-1.6v
28DG/ORFuel Pressure Sensor0.5-4.5v
29-30---Not Used---
31BK/TNPower Ground  
32BK/TNPower Ground  



Click image to see an enlarged view

Fig.

2000-01 RAM Pickup & Van 3.9L VIN X 'C1' Black Connector
PCM Pin #Wire ColorCircuit Description (32-Pin)Value at Hot Idle
1---Not Used---
2LG/BKIgnition Switch Power (B+)12-14v
3---Not Used---
4BK/LBSensor Ground  
5---Not Used---
6BK/WTPNP Switch Sense SignalIn P/N: 0v, Others: 5v
7BK/GYCoil 1 Driver Control5°, 55 mph: 8° dwell
8GY/BKCKP Sensor SignalDigital Signals: 0-5-0v
9---Not Used---
10YL/BKIAC 2 Driver ControlPulse Signals
11BR/WTIAC 3 Driver ControlPulse Signals
12---Not Used---
13ORPower Takeoff Switch SenseSwitch Off: 12v, On: 1v
14---Not Used---
15BK/RDIAT Sensor SignalAt 100°F: 1.83v
16TN/BKECT Sensor SignalAt 180°F: 2.80v
17VT/WT5-Volt Supply4.9-5.1v
18TN/YLCMP Sensor SignalDigital Signals: 0-5-0v
19GY/RDIAC 1 Driver ControlPulse Signals
20VT/BKIAC 4 Driver ControlPulse Signals
21---Not Used---
22RD/WTKeep Alive Power (B+)12-14v
23OR/DBTP Sensor Signal0.6-1.0v
24TN/WTHO2S-11 (B1 S1) Signal0.1-1.1v
25OR/BKHO2S-12 (B1 S2) Signal0.1-1.1v
26LG/RDHO2S-21 (B2 S1) Signal (Cal)0.1-1.1v
27DG/RDMAP Sensor Signal1.5-1.6v
28---Not Used---
29OR/TNHO2S-22 (B2 S2) Signal (Cal)0.1-1.1v
30---Not Used---
31BK/TNPower Ground  
32BK/TNPower Ground  



Click image to see an enlarged view

Fig.

2000-01 RAM Pickup & Van 3.9L VIN X 'C2' White Connector
PCM Pin #Wire ColorCircuit Description (32-Pin)Value at Hot Idle
1VTTransmission Temperature Sensor SignalAt 200°F: 2.40v
2-3, 7, 9---Not Used---
4WT/DBInjector 1 Driver1-4 ms
5YL/WTInjector 3 Driver1-4 ms
6GYInjector 5 Driver1-4 ms
8VT/WTGovernor Pressure SolenoidPWM Signal: 0-12-0v
10DGGenerator Field ControlDigital Signals: 0-12-0v
11OR/BKTCC Solenoid ControlAt Cruise w/TCC On: 1v
12BR/DBInjector 6 Driver1-4 ms
15TNInjector 2 Driver1-4 ms
16LB/BRInjector 4 Driver1-4 ms
21BR3-4 Shift Solenoid ControlCruise w/solenoid On: 1v
23GY/OREngine Oil Pressure Sensor1.6v at 24 psi
25DB/BKOSS Sensor (-) SignalMoving: AC pulse signals
27WT/ORVehicle Speed SignalDigital Signal
28LG/BKOSS Sensor (+) SignalMoving: AC pulse signals
29LG/WTGovernor Pressure Sensor0.58v
30PKTransmission Relay ControlRelay Off: 12v, On: 1v
31OR5-Volt Supply4.9-5.1v
2000-01 RAM Pickup & Van 3.9L VIN X 'C3' Gray Connector
PCM Pin #Wire ColorCircuit Description (32-Pin)Value at Hot Idle
1DB/ORA/C Clutch Relay ControlRelay Off: 12v, On: 1v
3DB/YLASD Relay ControlRelay Off: 12v, On: 1v
4TN/RDSpeed Control Vacuum SolenoidVacuum Increasing: 1v
5LG/RDSpeed Control Vent SolenoidVacuum Decreasing: 1v
6-7---Not Used---
8BR/VTHO2S-11 Heater Control (Cal)PWM Signal: 0-12-0v
9DG/PKHO2S-12 Heater Relay (Cal)Relay Off: 12v, On: 1v
10WT/DGLDP Solenoid ControlPWM Signal: 0-12-0v
11YL/RDSpeed Control Power Supply12-14v
12DG/ORASD Relay Power (B+)12-14v
13OR/WTOverdrive Off Switch SenseSwitch Off: 12v, On: 1v
14ORLDP Switch Sense SignalLDP Switch Closed: 0v
15PK/YLBattery Temperature SensorAt 86°F: 1.96v
16-18, 21---Not Used---
19BR/WTFuel Pump Relay ControlRelay Off: 12v, On: 1v
20PK/WTEVAP Purge Solenoid ControlPWM Signal: 0-12-0v
22BRA/C Switch SignalA/C Off: 12v, On: 1v
23LG/WTA/C Select SignalA/C Off: 12v, On: 1v
24WT/PKBrake Switch Sense SignalBrake Off: 0v, On: 12v
25DBGenerator Field Source12-14v
26DB/WTFuel Level Sensor SignalFull: 0.56v, 1/2 full: 2.5v
27PK/DBSCI Transmit Signal0v
28WT/BKCCD Bus (-) Signal  
29DGSCI Receive Signal5v
30VT/BRCCD Bus (+) SignalDigital Signals: 0-5-0v
32RD/LGSpeed Control Set Switch SignalS/C & Set Switch On: 3.8v
 
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