Toyota Celica, Corolla, ECHO & MR2 1999-05

Connector Pin Identification 1

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Fig.

PCM Pin #Wire ColorCircuit Description (22 Pin)Value at Hot Idle
1WTBattery Direct12-14v
2---Not Used---
3GN/RDCircuit Opening Relay (FC)0-3v, off-idle: 12v
4BL/BKEVAP Vapor Pressure SensorFuel Cap Off: 2.9-3.7v
5BR/YLOverdrive Main SwitchSwitch Off: 12v, On: 0v
6LG/RDMultiplex Meter Input (MPX2)Digital Signals
7WT/BKPower Ground (E03)<0.1v
8BK/ORIgnition Switch Power12-14v
9---Not Used---
10BL/WTCruise Control Signal (IDLO)1.5v, off-idle: 12v
11WTSIL Signal (Scan Tool)Digital Signal
12YL/BKA/C Magnetic Clutch (ACMG)Clutch Off: 0v, On: 12v
13-14---Not Used---
15RD/BKMIL (lamp) ControlMIL Off: 12v, On: 1v
16BK/RDEFI Main Relay Power12-14v
17-22---Not Used---


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Fig.

PCM Pin #Wire ColorCircuit Description (28 Pin)Value at Hot Idle
1BKCruise Control Signal (OD1)At Cruise in OD: 12v
2RD/BKA/T Select Switch ReverseIn 'R': 12v, Others: 0v
3BL/WTCooling Fan 3 RelayRelay Off: 12v, On: 1v
4BL/YLCooling Fan 1 RelayRelay Off: 12v, On: 1v
5PK/BKData Link Connector (TC)12-14v
6GN/WTStop Light Switch SignalBrake Off: 0v, On: 12v
7, 13-15---Not Used---
8PKCenter Airbag AssemblyDigital Signals
9RD/BLACIS Solenoid Control (VSV)12v or 0v
10LG/RDMultiplex Meter Input (MPX1)Digital Signals
11BLStarter Switch Signal9-11v (cranking)
12WT/BKPower Ground (EC)<0.1v
16YL/GNHO2S-12 (B1 S2) Heater1v (Heater On)
17, 19-20---Not Used---
18ORA/C Dual Pressure SwitchA/C Off: 12v, On: 1v
21BL/BKEFI Main Relay Power12-14v
22WT/RDSpeedometer IndicatorAt 55 mph: 48 Hz
23GN/OREVAP Vapor Pressure (VSV)12v or 0v
24BL/WTA/T Select Switch DriveIn 'D': 12v, Others: 0v
25WTHO2S-12 (B1 S2) Signal0.1-1.1v
27BR/WTTachometer Signal (TACO)Pulse Signals
28GNA/C Magnetic Clutch & Lock SensorA/C Off: 12v, On: 1v


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Fig.

PCM Pin #Wire ColorCircuit Description (24 Pin)Value at Hot Idle
1YL/GNMAF Sensor Ground (EVG)<0.050v
2RDSensor VREF4.9-5.1v
3YL/RDHO2S-11 (B1 S1) Heater1v (Heater On)
4GN/OREVAP Purge Solenoid (VSV)12v or 0v
6BL/BKCam Timing Oil Control VVT-AC pulse signals
7BL/WTCam Timing Oil Control VVT+AC pulse signals
8PK/BLA/T: Select Switch NeutralIn P/N: 9-11v (cranking)
9YL/BKA/T Select Switch LowIn Low: 12v, Others: 0v
10YLGenerator Control Signal (L)12v
11GN/WTMAF Sensor Signal1.1-1.5v
12BKHO2S-11 (B1 S1) Signal0.1-1.1v
13GY/BLA/T Oil Temperature SensorAt 230°F: 0.95v
14GNECT Sensor Signal1-4v (varies with temp.)
15BLCMP Sensor Signal (G2+)AC pulse signals
16ORCKP Sensor Signal (NE+)AC pulse signals
17BRPower Ground (E1)<0.1v
18BRSensor Ground (E2)<0.050v
19BL/YLA/T Select Switch 2ndIn 2nd: 12v, Others: 0v
20PKA/T: Select Switch ParkIn P/N: 9-11v (cranking)
21GNOil Pressure Switch SignalOpen: 12v, Closed: 0v
22BL/RDIAT Sensor Signal1-4v (varies with temp.)
23BK/WTTP Sensor Signal0.3-1.0v
24WTCKP/CMP Sensor Ground (-)<0.050v


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Fig.

PCM Pin #Wire ColorCircuit Description (31 Pin)Value at Hot Idle
1RDInjector 1 Control2.0-3.3 ms
2RD/BLInjector 2 Control2.0-3.3 ms
3RD/WTInjector 3 Control2.0-3.3 ms
4RD/BKInjector 4 Control2.0-3.3 ms
5YL/GNA/T-ECT Solenoid (SLT-)Pulse signals
6YL/RDA/T-ECT Solenoid (SLT+)Pulse signals
7GNA/T-ECT Solenoid (SL1+)Pulse signals
8BR/YLA/T-ECT Solenoid (S1)In 3rd or OD: 1v
9VTA/T-ECT Solenoid (SL1-)Pulse Signals
10RD/BKIgniter Transistor 1 ControlDigital Signal: 0-5-0v
11RD/WTIgniter Transistor 2 ControlDigital Signal: 0-5-0v
12GN/RDIgniter Transistor 3 ControlDigital Signal: 0-5-0v
13RD/YLIgniter Transistor 4 ControlDigital Signal: 0-5-0v
15BKA/T: ECT VSS (-) SignalPulse signals
16WT/BLA/T: ECT VSS (+) SignalPulse signals
17PK/WTEVAP Canister Closed Valve12v or 0v
18BK/WTIAC Valve Signal (RSO)Pulse signals
19GN/WTA/T-ECT Solenoid (SL)In Lockup: 12-14v
20YLA/T-ECT Solenoid (S2)1st or OD: 1v
21WT/BKPower Ground (E01)<0.1v
22YL/BKOIL Pressure SwitchSwitch On: 12-14v
23WTCamshaft Timing Oil Control Valve (-)Pulse signals
24GN/ORCamshaft Timing Oil Control Valve (+)Pulse signals
25BK/YLIgniter Signal (IGF)Digital Signal: 0-5-0v
27WTKnock Sensor Signal<0.075v AC
28PKPSP Switch SignalStraight: 12v, Turning: 0v
29BR/WTA/T-ECT ST SignalPulse signals
31WT/BKPower Ground (E02)<0.1v


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Fig.

PCM Pin #Wire ColorCircuit Description (22 Pin)Value at Hot Idle
1WTBattery Direct12-14v
2---Not Used---
3GN/RDCircuit Opening Relay (FC)0-3v, off-idle: 12v
4BL/BKEVAP Vapor Pressure SensorFuel Cap Off: 2.9-3.7v
5BR/YLOverdrive Main SwitchOpen: 12v, Closed: 0v
6LG/RDMultiplex Meter Input (MPX2)Digital Signals
7WT/BKPower Ground (E03)<0.1v
8BK/ORIgnition Switch Power12-14v
9BLA/T: Trans. Shift Switch SFTUSwitch Off: 12v
10BL/WTCruise Control Signal (IDLO)1.5v, off-idle: 12v
11WTSIL Signal (Scan Tool)Digital Signals
12YL/BKA/C Magnetic Clutch (ACMG)Clutch Off: 0v, On: 12v
13-14---Not Used---
15RD/BKMIL (lamp) ControlMIL Off: 12v, On: 1v
16BK/RDEFI Main Relay Power12-14v
17PKA/T: Trans. Shift Switch SFTDSwitch Off: 12v
18-22---Not Used---


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Fig.

PCM Pin #Wire ColorCircuit Description (28 Pin)Value at Hot Idle
1BKCruise Control Signal (OD1)At Cruise in OD: 12v
2RD/BKA/T Select Switch ReverseIn 'R': 12v, Others: 0v
3BL/WTCooling Fan 3 RelayRelay Off: 12v, On: 1v
4BL/YLCooling Fan 1 RelayRelay Off: 12v, On: 1v
5PK/BKData Link Connector (TC)12-14v
6GN/WTStop Light Switch SignalBrake Off: 0v, On: 12v
7---Not Used---
8PKCenter Airbag AssemblyDigital Signals
9RD/BLACIS Solenoid Control (VSV)12v or 0v
10LG/RDMultiplex Meter Input (MPX1)Digital Signals
11BLStarter Switch Signal9-11v (cranking)
12WT/BKPower Ground (EC)<0.1v
13---Not Used---
14BK/WTCruise Control (D) ECU InputPulse Signals
15---Not Used---
16YL/GNHO2S-12 (B1 S2) Heater1v (Heater On)
17---Not Used---
18ORA/C Dual Pressure SwitchA/C Off: 12v, On: 1v
19-20---Not Used---
21BL/BKEFI Main Relay Power12-14v
22WT/RDSpeedometer IndicatorAt 55 mph: 48 Hz
23GN/OREVAP Vapor Pressure (VSV)12v or 0v
24BL/WTA/T Select Switch DriveIn 'D': 12v, Others: 0v
25WTHO2S-12 (B1 S2) Signal0.1-1.1v
26---Not Used---
27BR/WTTachometer Signal (TACO)Pulse Signals
28GNA/C Magnetic Clutch & Lock SensorA/C Off: 12v, On: 1v


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Fig.

PCM Pin #Wire ColorCircuit Description (24 Pin)Value at Hot Idle
1YL/GNMAF Sensor Ground<0.050v
2RDSensor VREF4.9-5.1v
3YL/RDHO2S-11 (B1 S1) Heater1v (Heater On)
4GN/OREVAP Purge Solenoid (VSV)12v or 0v
6BL/BKCam/Time Oil (OVL-) ValveDC pulse signals
7BL/WTCam/Time Oil (OVL+) ValveDC pulse signals
8PK/BLA/T: Select Switch NeutralIn P/N: 9-11v (cranking)
9YL/BKA/T Select Switch LowIn Low: 12v, Others: 0v
10YLGenerator Control Signal (L)12v
11GN/WTMAF Sensor Signal1-3v
12BKHO2S-11 (B1 S1) Signal0.1-1.1v
13GY/BLA/T Oil Temperature SensorAt 230°F: 0.95v
14GNECT Sensor Signal1-4v (varies with temp.)
15BLCMP Sensor Signal (G2+)AC pulse signals
16ORCKP Sensor Signal (NE+)AC pulse signals
17BRPower Ground (E1)<0.050v
18BRSensor Ground (E2)<0.050v
19BL/YLA/T Select Switch 2ndIn 2nd: 12v, Others: 0v
20PKA/T: Select Switch ParkIn P/N: 9-11v (cranking)
21GYOIL Level Warning SwitchOpen: 12v, Closed: 0v
22BL/RDIAT Sensor Signal1-4v (varies with temp.)
23BK/WTTP Sensor Signal1.1-1.9v
24WTCKP/CMP Sensor Ground (-)<0.050v


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Fig.

PCM Pin #Wire ColorCircuit Description (31 Pin)Value at Hot Idle
1RDInjector 1 Control2.0-3.3 ms
2RD/BLInjector 2 Control2.0-3.3 ms
3RD/WTInjector 3 Control2.0-3.3 ms
4RD/BKInjector 4 Control2.0-3.3 ms
5YL/GNA/T-ECT Solenoid (SLT-)Pulse signals
6YL/RDA/T ECT Solenoid (SLT+)Pulse signals
7, 9GN, VTA/T ECT Solenoid (SL1+, -)Pulse signals
8, 20BR, ORA/T ECT Solenoid (SL2+, -)Pulse signals
10RD/BKIgniter Transistor 1 ControlDigital Signal: 0-5-0v
11RD/WTIgniter Transistor 2 ControlDigital Signal: 0-5-0v
12GN/RDIgniter Transistor 3 ControlDigital Signal: 0-5-0v
13RD/YLIgniter Transistor 4 ControlDigital Signal: 0-5-0v
14PK/BKOD Clutch Speed Signal (+)AC pulse signals
15BKA/T ECT VSS (-) SignalPulse signals
16WT/BLA/T ECT VSS (+) SignalPulse signals
17PK/WTEVAP Canister Closed Valve12v or 0v
18BK/WTIAC Valve Signal (RSO)Pulse signals
19PK/BLA/T ECT Solenoid (DSL)In Lockup: 12-14v
21WT/BKPower Ground (E01)<0.1v
22YL/BKOIL Pressure SwitchOpen: 12v, Closed: 0v
23WTCam Timing Oil Valve (OCV-)Pulse signals
24GN/ORCam Timing Oil Valve (OCV+)Pulse signals
25BK/YLIgniter Signal (IGF)Pulse signals
26GN/WTOD Clutch Speed Signal (-)AC pulse signals
27WTKnock Sensor Signal<0.075v AC
28PKPSP Switch SignalStraight: 12v, Turning: 0v
29YLA/T-ECT Solenoid (S4)In Drive: 1v
31WT/BKPower Ground (E02)<0.1v


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Fig.

PCM Pin #Wire ColorCircuit Description (16 Pin)Value at Hot Idle
1RDSensor VREF4.9-5.1v
2BLMAP Sensor Signal1-1.5v
3BL/RDIAT Sensor SignalAt 100°F: 2.60v
4GNECT Sensor SignalAt 180°F: 0.51v
5WTO2S-12 (B1 S2) Signal0.1-1.1v
6WTO2S-11 (B1 S1) Signal0.1-1.1v
7RD/WTEVAP Vapor Pressure Sensor2.9-3.1v (with hose off)
8YL/BKVSV Vapor Press Solenoid12v or 0v
9BRSensor Ground<0.050v
11BK/WTTP Sensor Signal0.3-0.8v
13WTKnock Sensor Signal<0.075v AC
15YLData Link Connector (TE)12-14v
16BRPower Ground<0.1v


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Fig.

PCM Pin #Wire ColorCircuit Description (22 Pin)Value at Hot Idle
1PKBattery Direct12-14v
2ORDefogger/Light Idle Up SignalSwitch On: 12v, Off: 0v
4GN/WTStop Light Switch SignalBrake Off: 0v, On: 12v
5RD/BKMIL (lamp) ControlMIL Off: 12v, On: 1v
7GY/BLMain Overdrive SwitchSwitch Off: 12-14v
8BL/YLA/C Amplifier Signal (A/TS)A/C On: 1.5v
9ORVehicle Speed SensorAt 55 mph: 48 Hz
10BL/BKA/C Amplifier Signal (AC1)Clutch On: 1.5v, Off: 12v
11BKStarter Switch Signal9-11v (cranking)
12BK/RDEFI Main Relay Power12-14v
14GN/RDCircuit Opening Relay (FC)0-3v, off-idle: 12v
15GN/BKA/C Pressure SwitchSwitch Closed: 0.1v
16WTData Link Connector (SDL)0v
17RD/WTA/T Select Switch ReverseIn 'R': 12v, Others: 0v
18YL/GNA/T Select Switch 2ndIn 2nd: 12v, Others: 0v
19YL/RDA/T Select Switch LowIn Low: 12v, Others: 0v
20PKA/T-ECT ECU (OD1) SignalPulses
21GN/YLA/C Amplifier Signal (ACT)Clutch On: 12v, Off: 1.5v
22BK/YLA/T Neutral Start SwitchIn P/N: 9-11v (cranking)


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Fig.

PCM Pin #Wire ColorCircuit Description (26 Pin)Value at Hot Idle
1YL/BKA/T-ECT Solenoid (SL)In Lockup: 12-14v
2PKA/T-ECT Solenoid (S1)In 3rd or OD: 1v
3BK/YLIgniter Signal (IGF)Digital Signal: 0-5-0v
4ORCKP Sensor Signal (NE+)AC pulse signals
5BKDistributor Signal (G2+)AC pulse signals
9GN/WTISC Signal (ISCC)Pulse Signals
10BK/WTISC Signal (ISCO)Pulse Signals
11BK/WTInjector 2 Control2.0-3.3 ms
12BLInjector 1 Control2.0-3.3 ms
13BRPower Ground<0.1v
14BRSensor Ground<0.050v
15BR/YLA/T-ECT Solenoid (S2)1st or OD: 1v
17WTCKP/CMP Sensor Ground (-)<0.050v
20WTIgniter Signal (IGT)Digital Signal: 0-5-0v
22GN/BKEVAP Purge Solenoid (VSV)12v or 0v
23BL/BKEGR Solenoid Control (VSV)12v or 0v
24BK/YLInjector 4 Control2.0-3.3 ms
25BK/RDInjector 3 Control2.0-3.3 ms
26BRPower Ground<0.1v


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Fig.

PCM Pin #Wire ColorCircuit Description (16 Pin)Value at Hot Idle
1YLSensor VREF4.9-5.1v
2LG/RDMAP Sensor Signal1-1.5v
3YL/BKIAT Sensor SignalAt 100°F: 2.60v
4WTECT Sensor SignalAt 180°F: 0.51v
5RDHO2S-12 (B1 S2) Signal0.1-1.1v
6WTHO2S-11 (B1 S1) Signal0.1-1.1v
7BLEVAP Vapor Pressure Sensor2.9-3.1v (with hose off)
8PKHO2S-11 (B1 S1) Heater1v (Heater On)
9BRSensor Ground<0.050v
11LGTP Sensor Signal0.3-0.8v
12RD/WTCruise Control Signal (OD1)At Cruise in OD: 12v
13BKKnock Sensor Signal<0.075v AC
14PKHO2S-12 (B1 S2) Heater1v (Heater On)
15BL/WTData Link Connector12-14v
16BRPower Ground<0.1v


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Fig.

PCM Pin #Wire ColorCircuit Description (22 Pin)Value at Hot Idle
1RD/WTBattery Direct12-14v
2BKDefogger Idle Up SwitchSwitch On: 12v, Off: 0v
3BL/WTCruise Control Signal (IDLO)1.5v, off-idle: 12v
4GN/WTStop Light Switch SignalBrake Off: 0v, On: 12v
5RD/YLMIL (lamp) ControlMIL Off: 12v, On: 1v
8BKTachometer Signal (TACO)Pulse Signals
9PK/WTVehicle Speed SensorAt 55 mph: 48 Hz
10YL/RDA/C Amplifier Signal (AC1)Clutch On: 1.5v, Off: 12v
11BK/WTStarter Switch Signal9-11v (cranking)
12BKEFI Main Relay Power12-14v
13GNTail Light Switch SignalSwitch On: 12v, Off: 0v
14GN/RDCircuit Opening Relay (FC)0-3v, off-idle: 12v
16WTSIL Signal (Scan Tool)Digital Signal
17RD/BKA/T Select Switch ReverseIn 'R': 12v, Others: 0v
18GN/RDA/T Select Switch 2ndIn 2nd: 12v, Others: 0v
19GN/BKA/T Select Switch LowIn Low: 12v, Others: 0v
21RD/BLA/C Amplifier Signal (ACT)Clutch On: 12v, Off: 1.5v
22LGOverdrive Main SwitchSwitch Off: 12v, On: 0v


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Fig.

PCM Pin #Wire ColorCircuit Description (26 Pin)Value at Hot Idle
1BK/WTA/T Neutral Start SwitchIn P/N: 9-11v (cranking)
4BKCKP Sensor Signal (NE+)AC pulse signals
5BKDistributor Signal (G2+)AC pulse signals
6BL/RDPSP Switch SignalStraight: 12v, Turning: 0v
7RDEVAP Vapor Pressure (VSV)12v or 0v
8BL/BKEVAP Purge Solenoid (VSV)12v or 0v
10BK/BLISC Signal (RSO)Pulse Signals
11BK/RDInjector 2 Control2.0-3.3 ms
12YLInjector 1 Control2.0-3.3 ms
13BRSensor Ground<0.050v
14BRPower Ground<0.1v
16BL/YLIgniter Signal (IGF)Digital Signal: 0-5-0v
17WTCKP/CMP Sensor Ground (-)<0.050v
19RD/BLIgniter Transistor 2 ControlDigital Signal: 0-5-0v
20YL/GNIgniter Transistor 1 ControlDigital Signal: 0-5-0v
21BL/YLA/T-ECT Solenoid (SL)In Lockup: 12-14v
22BR/YLA/T-ECT Solenoid (S2)1st or OD: 1v
23PKA/T-ECT Solenoid (S1)In 3rd or OD: 1v
24BKInjector 4 Control2.0-3.3 ms
25WTInjector 3 Control2.0-3.3 ms
26BRSensor Ground<0.050v


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Fig.

PCM Pin #Wire ColorCircuit Description (22 Pin)Value at Hot Idle
1WTBattery Direct12-14v
2---Not Used---
3GN/RDCircuit Opening Relay (FC)0-3v, off-idle: 12v
4PKEVAP Vapor Pressure Sensor2.9-3.1v (with hose off)
5BR/YLOverdrive "Off" IndicatorLight Off: 12v, On: 1v
6GN/ORMultiplex Meter Input (MPX2)Digital Signals
7WT/BKPower Ground (E03)<0.1v
8BK/ORIgnition Switch Power (B+)12-14v
9---Not Used---
10BL/WTCruise Control Signal (IDLO)1.5v, off-idle: 12v
11WTSIL Signal (Scan Tool)Digital Signals
12-14---Not Used---
15WTMIL (lamp) ControlMIL Off: 12v, On: 1v
16BK/RDEFI No. 1 Fuse Power12-14v
17-22---Not Used---


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Fig.

PCM Pin #Wire ColorCircuit Description (28 Pin)Value at Hot Idle
1BKCruise Control Signal (OD1)At Cruise in OD: 12v
2RD/BKBackup Light Switch SignalIn 'R': 12v, Others: 0v
3BL/WTCooling Fan Relay 3 ControlRelay Off: 12v, On: 1v
4BL/YLCooling Fan Relay 1 ControlRelay Off: 12v, On: 1v
5PK/BLData Link Connector (TC)12-14v
6GN/WTStop Light Switch Signal (STP)Brake Off: 0v, On: 12v
7---Not Used---
8PKCenter Airbag AssemblyDigital Signals
9RD/BLACIS Solenoid (VSV)12v or 0v
10LG/RDMultiplex Meter Input (MPX1)Digital Signals
11BLStarter Switch Signal (STA)9-11v (cranking)
12WT/BKPower Ground (EC)<0.1v
13-15---Not Used---
16YL/GNHO2S-12 (B1 S2) Heater1v (Heater On)
17---Not Used---
18ORA/C Dual Pressure SwitchA/C Off: 12v, On: 1v
19BR/YLOverdrive Lamp ControlAt Cruise in OD: 1v
20---Not Used---
21BL/BKEFI Main Relay Power12-14v
22WT/RDVehicle Speed Sensor (SPD)At 55 mph: 48 Hz
23GN/OREVAP Vapor Pressure (VSV)12v or 0v
24BK/ORA/T Select Switch DriveIn 'D': 12v, Others: 0v
25WTHO2S-12 (B1 S2) Signal0.1-1.1v
26---Not Used---
27BR/WTTachometer Signal (TACO)Pulse Signals
28GNA/C Magnetic Clutch (LCK1)Clutch Off: 0v, On: 12v


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Fig.

PCM Pin #Wire ColorCircuit Description (24 Pin)Value at Hot Idle
1YL/GNMAF Sensor Ground (EVG)<0.050v
2RDSensor VREF (VC)4.9-5.1v
3YL/RDHO2S-11 (B1 S1) Heater1v (Heater On)
4GN/OREVAP Purge Solenoid (VSV)12v or 0v
8PK/BLA/T Neutral Start SwitchIn 'N': 12v, Others: 0v
9YL/BKA/T Low Gear Position SwitchIn 'LL': 12v, Others: 0v
11GN/WTMAF Sensor Signal (VG)1.0-1.5v
12BKHO2S-11 (B1 S1) Signal0.1-1.1v
13GN/BLTFT (fluid) Sensor (THO)1-4v (varies with temp.)
14GNECT Sensor Signal (THW)1-4v (varies with temp.)
15BLCMP Sensor Signal (G2)AC pulse signals
16, 24BK, WTCKP Sensor Signal (NE+), (NE-)AC pulse signals
17BRPower Ground (E1)<0.1v
18BRPower Ground (E02)<0.1v
19BL/YLA/T 2nd Gear Position SwitchIn '2L': 12v, Others: 0v
20PKA/T Park Position SwitchIn 'P': 12v, Others: 0v
22BL/RDIAT Sensor Signal (THA)1-4v (varies with temp.)
23BK/WTTP Sensor Signal (VTA)1.1-1.9v


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Fig.

PCM Pin #Wire ColorCircuit Description (31 Pin)Value at Hot Idle
1RDInjector 1 Control2.0-3.3 ms
2RD/BLInjector 2 Control2.0-3.3 ms
3RD/WTInjector 3 Control2.0-3.3 ms
4RD/BKInjector 4 Control2.0-3.3 ms
5YL/GNA/T-ECT Solenoid (SLT-)Pulse Signals
6YL/RDA/T-ECT Solenoid (SLT+)Pulse Signals
7WT/BKSensor Ground (E03)<0.050v
8BR/YLA/T-ECT Solenoid (S1)In 3rd or OD: 1v
10RD/BKIgniter Transistor 1 ControlDigital Signal: 0-5-0v
11RD/WTIgniter Transistor 2 ControlDigital Signal: 0-5-0v
12GN/RDIgniter Transistor 3 ControlDigital Signal: 0-5-0v
13RD/YLIgniter Transistor 4 ControlDigital Signal: 0-5-0v
15, 16BK, WT/BLTurbine Speed Sensor (NT-), (NT+)AC pulse signals
17VT/WTEVAP Canister Closed Valve (VSV)12v or 0v
18BK/WTIAC Valve Signal (RSO)  
19GN/WTA/T-ECT Solenoid (SL)In Lockup: 12-14v
20YLA/T-ECT Solenoid (S2)1st or OD: 1v
21WT/BKPower Ground (E01)<0.1v
22YL/BKOIL Pressure Switch (MOPS)Closed: 1v, Open: 12v
23, 24WT, GN/ORCam/Time Oil Control Valve (-), (+)Pulse signals
25BL/YLIgniter Signal (IGF)Digital Signal: 0-5-0v
27WTKnock Sensor Signal (KNK1)<0.075v AC
28PKPSP Switch SignalStraight: 12v, Turning: 0v
29BR/WTA/T-ECT Solenoid (ST)Pulse Signals
31WT/BKSensor Ground (E02)<0.050v


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Fig.

PCM Pin #Wire ColorCircuit Description (22 Pin)Value at Hot Idle
1BK/YLBattery Direct12-14v
2YLWater Temp. Cool IndicatorIndicator On: 12, Off: 0v
3BLEVAP Canister Closed Valve12v or 0v
5YL/RDMIL (lamp) ControlMIL Off: 12v, On: 1v
6YL/RDWater Temp. Hot IndicatorIndicator On: 12v, Off: 0v
8BKTachometer Signal (TACO)Pulse Signals
9VT/WTSpeed Signal from C/MeterAt 55 mph: 48 Hz
10BK/WTA/C Amplifier Signal (AC1)Clutch On: 1.5v, Off: 12v
11BKStarter Switch Signal9-11v (cranking)
12BK/RDEFI Main Relay Power12-14v
14BKCircuit Opening Relay (FC)0-3v, off-idle: 12v
16LG/BKSIL Signal (Scan Tool)Digital Signal
17RD/YLA/T Select Switch ReverseIn 'R': 12v, Others: 0v
18GNA/T Select Switch 2ndIn 2nd: 12v, Others: 0v
19GN/WTA/T Select Switch LowIn Low: 12v, Others: 0v
20BL/WTMirror Heater Switch SignalSwitch On: 12-14v
21BKA/C Amplifier Signal (ACT)Clutch On: 12v, Off: 1.5v
22BKA/T Neutral Start SwitchCranking: 9-11v


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Fig.

PCM Pin #Wire ColorCircuit Description (12 Pin)Value at Hot Idle
1WT/BLA/T-ECT Solenoid (SLT+)Pulse Signals
2BK/WTA/T-ECT Solenoid (ST)Pulse Signals
3WT/GNA/T-ECT Solenoid (S1)In 3rd or OD: 1v
4GN/ORA/T: Overdrive "Off" IndicatorLight Off: 12v
5RDTurbine Speed Sensor (NT+)AC pulse signals
6GNA/T-ECT Solenoid (SL)In Lockup: 12-14v
7WTA/T-ECT Solenoid (SLT-)Pulse Signals
9WT/RDA/T: ECT Solenoid (S2)1st or OD: 1v
10YLA/T Oil Temperature SensorAt 230°F: 0.95v
11BKTurbine Speed Sensor (NT-)AC pulse signals
12GN/ORA/T: Overdrive Main SwitchSwitch Off: 12v


Click image to see an enlarged view

Fig.

PCM Pin #Wire ColorCircuit Description (16 Pin)Value at Hot Idle
1RD/WTSensor VREF (VC)4.9-5.1v
2PKMAF Sensor Signal (VG)1.1-1.5v
3YL/BKIAT Sensor Signal1-4v (varies with temp.)
4RD/BLECT Sensor Signal1-4v (varies with temp.)
5BKHO2S-12 (B1 S2) Signal0.1-1.1v
6RDHO2S-11 (B1 S1) Signal0.1-1.1v
7BL/BKMaximum Hot SwitchSwitch On: 12v, Off: 0v
8BK/ORHO2S-11 (B1 S1) Heater1v (Heater On)
9BRSensor Ground (E2)<0.050v
10VTMAF Sensor Ground (EVG)<0.050v
11YL/RDTP Sensor Signal (VTA)1.1-1.9v
12YLPSP Switch SignalStraight: 12v, Turning: 0v
13WTKnock Sensor Signal<0.075v AC
14BKEVAP Vapor Pressure SensorFuel Cap Off: 2.9-3.7v
15PK/BLData Link Connector (TC)12-14v
16WTHO2S-12 (B1 S2) Heater1v (Heater On)


Click image to see an enlarged view

Fig.

PCM Pin #Wire ColorCircuit Description (26 Pin)Value at Hot Idle
1BRPower Ground (E03)<0.1v
2BK/RDIAC Signal (RSD)Pulse Signals
3YLIgniter Signal (IGF)Pulse Signal: 0-5-0v
4BLGenerator Control Signal (L)12v
5RD/YLA/T Select Switch DriveIn 'D': 12v, Others: 0v
6GN/WTStop Light Switch SignalBrake Off: 0v, On: 12v
7---Not Used---
8WT/BLWater Temperature SwitchSwitch Off: 12v
9WT/GNEVAP Purge Solenoid (VSV)12v or 0v
10RD/WTCamshaft Timing Oil Control Valve (+)AC pulse signals
11BK/YLInjector 2 Control2.0-3.3 ms
12BK/ORInjector 1 Control2.0-3.3 ms
13BRPower Ground (E1)<0.1v
14BRPower Ground (E01)<0.1v
15BRCase Ground<0.050v
16WTCKP/CMP Sensor Ground (-)<0.050v
17ORCKP Sensor Signal (NE+)AC pulse signals
18BKCMP Sensor Signal (G2+)AC pulse signals
19GN/YLIgniter Transistor 4 ControlDigital Signal: 0-5-0v
20GN/ORIgniter Transistor 3 ControlDigital Signal: 0-5-0v
21GN/BKIgniter Transistor 2 ControlDigital Signal: 0-5-0v
22GN/RDIgniter Transistor 1 ControlDigital Signal: 0-5-0v
23RD/BKCamshaft Timing Oil Control Valve (-)AC pulse signals
24BK/BLInjector 4 Control2.0-3.3 ms
25BK/WTInjector 3 Control2.0-3.3 ms
26BRPower Ground (E02)<0.1v


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Fig.

PCM Pin #Wire ColorCircuit Description (22 Pin)Value at Hot Idle
1BK/YLBattery Direct12-14v
2YLWater Temp. Cool IndicatorIndicator On: 12, Off: 0v
3BLEVAP Canister Closed Valve12v or 0v
4---Not Used---
5YL/RDMIL (lamp) ControlMIL Off: 12v, On: 1v
6YL/RDWater Temp. Hot IndicatorIndicator On: 12v, Off: 0v
8BKTachometer Signal (TACO)Pulse Signals
9VT/WTSpeed Signal from C/MeterAt 55 mph: 48 Hz
10BK/WTA/C Amplifier Signal (AC1)Clutch On: 1.5v, Off: 12v
11BKStarter Switch Signal9-11v (cranking)
12BK/RDEFI Main Relay Power12-14v
13---Not Used---
14BKCircuit Opening Relay (FC)0-3v, off-idle: 12v
15---Not Used---
16LG/BKSIL Signal (Scan Tool)Digital Signal
17RD/YLA/T Select Switch ReverseIn 'R': 12v, Others: 0v
18GNA/T Select Switch 2ndIn 2nd: 12v, Others: 0v
19GN/WTA/T Select Switch LowIn Low: 12v, Others: 0v
20BL/WTMirror Heater Switch SignalSwitch On: 12-14v
21BKA/C Amplifier Signal (ACT)Clutch On: 12v, Off: 1.5v
22BKA/T Neutral Start SwitchCranking: 9-11v


Click image to see an enlarged view

Fig.

PCM Pin #Wire ColorCircuit Description (12 Pin)Value at Hot Idle
1WT/BLA/T-ECT Solenoid (SLT+)Pulse Signals
2BK/WTA/T-ECT Solenoid (ST)Pulse Signals
3WT/GNA/T-ECT Solenoid (S1)In 3rd or OD: 1v
4GN/ORA/T: Overdrive "Off" IndicatorLight Off: 12v
5RDTurbine Speed Sensor (NT+)AC pulse signals
6GNA/T-ECT Solenoid (SL)In Lockup: 12-14v
7WTA/T-ECT Solenoid (SLT-)Pulse Signals
9WT/RDA/T: ECT Solenoid (S2)1st or OD: 1v
10YLA/T Oil Temperature SensorAt 230°F: 0.95v
11BKTurbine Speed Sensor (NT-)AC pulse signals
12GN/ORA/T: Overdrive Main SwitchSwitch Off: 12v


Click image to see an enlarged view

Fig.

PCM Pin #Wire ColorCircuit Description (16 Pin)Value at Hot Idle
1RD/WTSensor VREF (VC)4.9-5.1v
2PKMAF Sensor Signal (VG)1.1-1.5v
3YL/BKIAT Sensor Signal1-4v (varies with temp.)
4RD/BLECT Sensor Signal1-4v (varies with temp.)
5BKHO2S-12 (B1 S2) Signal0.1-1.1v
6WTHO2S-11 (B1 S1) Signal0.1-1.1v
7BL/BKMaximum Hot SwitchSwitch On: 12v, Off: 0v
8ORHO2S-11 (B1 S1) Heater1v (Heater On)
9BRSensor Ground (E2)<0.050v
10VTMAF Sensor Ground (EVG)<0.050v
11YL/RDTP Sensor Signal (VTA)1.1-1.9v
12YLPSP Switch SignalStraight: 12v, Turning: 0v
13WTKnock Sensor Signal<0.075v AC
14BKEVAP Vapor Pressure SensorFuel Cap Off: 2.9-3.7v
15PK/BLData Link Connector (TC)12-14v
16WTHO2S-12 (B1 S2) Heater1v (Heater On)


Click image to see an enlarged view

Fig.

PCM Pin #Wire ColorCircuit Description (26 Pin)Value at Hot Idle
1BRPower Ground (E03)<0.1v
2BK/RDIAC Signal (RSD)Pulse Signals
3YLIgniter Signal (IGF)Pulse Signal: 0-5-0v
4BLGenerator Control Signal (L)12v
5RD/YLA/T Select Switch DriveIn 'D': 12v, Others: 0v
6GN/WTStop Light Switch SignalBrake Off: 0v, On: 12v
7---Not Used---
8WT/BLWater Temperature SwitchSwitch Off: 12v
9WT/GNEVAP Purge Solenoid (VSV)12v or 0v
10RD/WTCamshaft Timing Oil Control Valve (+)AC pulse signals
11BK/YLInjector 2 Control2.0-3.3 ms
12BK/ORInjector 1 Control2.0-3.3 ms
13BRPower Ground (E1)<0.1v
14BRPower Ground (E01)<0.1v
15BRCase Ground<0.050v
16WTCKP/CMP Sensor Ground (-)<0.050v
17ORCKP Sensor Signal (NE+)AC pulse signals
18BKCMP Sensor Signal (G2+)AC pulse signals
19GN/YLIgniter Transistor 4 ControlDigital Signal: 0-5-0v
20GN/ORIgniter Transistor 3 ControlDigital Signal: 0-5-0v
21GN/BKIgniter Transistor 2 ControlDigital Signal: 0-5-0v
22GN/RDIgniter Transistor 1 ControlDigital Signal: 0-5-0v
23RD/BKCamshaft Timing Oil Control Valve (-)AC pulse signals
24BK/BLInjector 4 Control2.0-3.3 ms
25BK/WTInjector 3 Control2.0-3.3 ms
26BRPower Ground (E02)<0.1v


Click image to see an enlarged view

Fig.

PCM Pin #Wire ColorCircuit Description (31 Pin)Value at Hot Idle
1BK/RDEFI Main Relay Power12-14v
2BL/BKMaximum Hot Switch (MHSW)Switch Open: 0v, Closed: 12v
3BK/YLBattery Direct12-14v
4---Not Used---
5BKTachometer Signal (TACO)Pulse Signals
6YL/RDCooling Fan 1 Relay (CF)Relay Off: 12v, On: 1v
7WT/BLA/C Single Pressure Switch (FAN)Switch Open: 12v, Closed: 1v
8-9---Not Used---
10BKCircuit Opening Relay (FC)0-3v, off-idle: 12v
11YL/RDMIL (lamp) ControlMIL Off: 12v, On: 1v
12BL/WTHeater Sub1 Relay Control (ELS)Relay Off: 12v, On: 1v
13---Not Used---
14YL/BKCenter Airbag AssemblyDigital Signals
15-17---Not Used---
18LG/BKScan Tool Signal (SIL)Digital Signal
19RDScan Tool (WFSE)12v
20PK/BLData Link Connector (TC)12-14v
21BKEVAP Vapor Pressure SensorFuel Cap Off: 2.9-3.7v
22-31---Not Used---


Click image to see an enlarged view

Fig.

PCM Pin #Wire ColorCircuit Description (35 Pin)Value at Hot Idle
1-2---Not Used---
3YL/RDWater Temperature Cool IndicatorIndicator On: 12v, Off: 0v
4BK/RDHO2S-12 (B1 S2) Heater1v (Heater On)
5-6---Not Used---
7GN/ORA/T Overdrive "Off" IndicatorLight Off: 12v
8GN/WTA/T Select Switch LowIn Low: 12v, Others: 0v
9GNA/T Select Switch 2ndIn 2nd: 12v, Others: 0v
10RD/YLA/T Select Switch DriveIn 'D': 12v, Others: 0v
11RD/WTA/T Select Switch ReverseIn 'R': 12v, Others: 0v
12---Not Used---
13YLPSP Switch SignalStraight: 12v, Turning: 0v
14-16---Not Used---
17VT/WTSpeed Signal from Combination MeterAt 55 mph: 48 Hz
18---Not Used---
19GN/WTStop Light Switch SignalBrake Off: 0v, On: 12v
20-27---Not Used---
28YL/RDWater Temperature Hot IndicatorIndicator On: 12v, Off: 0v
29GN/ORA/T: Overdrive Main SwitchSwitch Off: 12v
30---Not Used---
31BK/WTA/C Amplifier Signal (AC)Clutch On: 1.5v, Off: 12v
32---Not Used---
33BKA/C Amplifier Signal (ACT)Clutch On: 12v, Off: 1.5v
34-35---Not Used---


Click image to see an enlarged view

Fig.

PCM Pin #Wire ColorCircuit Description (34 Pin)Value at Hot Idle
1BK/ORInjector 1 Control2.0-3.3 ms
2BK/YLInjector 2 Control2.0-3.3 ms
3BK/WTInjector 3 Control2.0-3.3 ms
4BK/BLInjector 4 Control2.0-3.3 ms
5BK/RDIAC Signal (RSD)Pulse Signals
6BRPower Ground (E02)<0.1v
7BRPower Ground (E01)<0.1v
8GN/RDIgniter Transistor 1 ControlDigital Signal: 0-5-0v
9GN/BKIgniter Transistor 2 ControlDigital Signal: 0-5-0v
10GN/ORIgniter Transistor 3 ControlDigital Signal: 0-5-0v
11GN/YLIgniter Transistor 4 ControlDigital Signal: 0-5-0v
12WT/GNEVAP Purge Solenoid (VSV)12v or 0v
16WTA/T-ECT Solenoid (SLT-)Pulse Signals
17WT/BLA/T-ECT Solenoid (SLT+)Pulse Signals
18RD/WTSensor VREF (VC)4.9-5.1v
19RD/BLECT Sensor Signal (THW)1-4v (varies with temp.)
20YL/BKIAT Sensor Signal1-4v (varies with temp.)
21YL/RDTP Sensor Signal (VTA)1.1-1.9v
23YLIgniter Signal (IGF)Pulse Signal: 0-5-0v
26BKCMP Sensor Signal (G2+)AC pulse signals
27ORCKP Sensor Signal (NE+)AC pulse signals
28BRSensor Ground (E2)<0.050v
30YL/GNA/T Oil Temperature Sensor (OIL)At 230°F: 0.95v
34WTCKP Sensor Ground (NE-)<0.050v
 
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