Toyota Tacoma 2002-06

Connector Pin Identification

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Fig.

PCM Pin #Wire ColorCircuit Description (26 Pin)Value at Hot Idle
1RD/WTHO2S-12 (B1 S2) HeaterHeater Off: 12v, On: 1v
2PK/GNHO2S-11 (B1 S1) HeaterHeater Off: 12v, On: 1v
2 ('99)RD/BKHO2S-11 (B1 S1) HeaterHeater Off: 12v, On: 1v
3WT/GNEVAP Purge Solenoid (VSV)12v or 0v
4GN/RDCruise Control ECUAt Cruise in OD: 12v
6BKIAC Signal (RSC)Pulse Signals
7BK/RDIAC Signal (RSO)Pulse Signals
9RD/BLInjector 4 Control1.6-2-9 ms
10RDInjector 3 Control1.6-2-9 ms
11WTInjector 2 Control1.6-2-9 ms
12WT/RDInjector 1 Control1.6-2-9 ms
13BRPower Ground<0.1v
14GN/YLCircuit Opening Relay (FC)0-3v, at off-idle: 12v
15BKTachometer Signal (TACO)Pulse Signals
17BK/YLIgniter Signal (IGF)Digital Signal: 0-5-0v
22BR/YLIgniter Transistor 2 ControlDigital Signal: 0-5-0v
23BK/BLIgniter Transistor 1 ControlDigital Signal: 0-5-0v
24BRShield Ground<0.050v
25BRPower Ground<0.1v
26BRPower Ground<0.1v


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Fig.

PCM Pin #Wire ColorCircuit Description (22 Pin)Value at Hot Idle
1BK/YLDirect Battery12-14v
2RD/BKA/T Select Switch ReverseIn 'R': 12v, Others: 0v
3PK/WTA/T Select Switch LowIn Low: 12v, Others: 0v
4PKA/T Select Switch 2ndIn 2nd: 12v, Others: 0v
5PKA/T Oil Temperature IndicatorLamp Off: 12v, On: 1v
6VT/RDMIL (lamp) ControlMIL Off: 12v, On: 1v
7BK/WTStarter Switch Signal9-11v (cranking)
8---Not Used---
9BLA/T Park (lamp) IndicatorLamp Off: 12v, On: 1v
10BL/ORO/D OFF Indicator (ODLP)Lamp Off: 12v, On: 1v
11BR/YLA/T Select Switch DriveIn 'D': 12v, Others: 0v
12WTSIL (Scan Tool) Signal12v
13BL/YLA/C Amplifier Signal (AC1)Clutch On: 1.5v, Off: 12v
14BL/BKA/C Amplifier Signal (ACT)Clutch On: 12v, Off: 1.5v
15GN/WTStop Light Switch SignalBrake Off: 0v, On: 12v
16WT/RDEFI Main Relay (B+)12-14v
17GNA/T Pattern Select SwitchNorm: 0v, PWR: 12v
18-19---Not Used---
20GN/RDDefogger Idle-up SignalLoad On: 12v, Off: 0v
21GN/ORSpeedometer Indicator (SP1)At 55 mph: 48 Hz
22BK/RDA/T: Neutral Start SignalIn P/N: 9-11v (cranking)


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Fig.

PCM Pin #Wire ColorCircuit Description (28 Pin)Value at Hot Idle
1-4---Not Used---
5LG/RDCruise Control ECU (IDLO)1.5v, off-idle: 12v
6GN/YLCircuit Opening Relay (FC)0-3v, at off-idle: 12v
7VT/WTDLC 7 Signal (TC)12v
8RD/YLEVAP Vapor Pressure Sensor2.5-3.1v (with fuel cap off)
9-12---Not Used---
13BKTachometer Signal (TACO)Pulse Signals
14-23---Not Used---
24---Not Used---
25GNOD Main Switch (ODMS)Switch Off: 12v, On: 1v
26-27---Not Used---
28YLPSP Switch SignalStraight: 12v, Turning: 0v


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Fig.

PCM Pin #Wire ColorCircuit Description (24 Pin)Value at Hot Idle
2GN/YLSensor VREF (VC)4.9-5.1v
3RD/WTHO2S-12 (B1 S2) HeaterHeater Off: 12v, On: 1v
4WTAFS-11 (B1 S1) HeaterHeater Off: 12v, On: 1v
6WT/GNEVAP Purge Solenoid (VSV)12v or 0v
7GY/GNEVAP Vapor Pressure (VSV)12v or 0v
9BK/BLTP Sensor Signal (VTA)0.3-0.8v
10RDHO2S-12 (B1 S2) Signal0.1-1.1v
11WTAFS-11 (B1 S1) Signal (+)Fixed at 3.3v
12GN/RDECT Sensor Signal (THW)At 180°F: 0.51v
14GYMAF Sensor Signal (VG)1.1-1.8v
15YLCMP Sensor SignalAC pulse signals
16RDCKP Sensor SignalAC pulse signals
17BRShield Ground (E1)<0.050v
18BR/BKSensor Ground (E2)<0.050v
20RDAFS-11 (B1 S1) Signal (-)Fixed at 3.3v
21YL/GNIAT Sensor Signal (THA)At 100°F: 2.60v
22BK/WTMAF Sensor Ground (E2G)<0.050v
24GNCKP/CMP Sensor Signal (-)<0.050v


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Fig.

PCM Pin #Wire ColorCircuit Description (31 Pin)Value at Hot Idle
1WT/RDInjector 1 Control2.0-3.3 ms
2WTInjector 2 Control2.0-3.3 ms
3RDInjector 3 Control2.0-3.3 ms
4RD/BLInjector 4 Control2.0-3.3 ms
5, 6WT/BKPower Ground (E03), (E04)<0.1v
7PK/YLA/T-ECT Solenoid (S1)3rd or OD: 1v
8LGA/T-ECT Solenoid (S2)1st or OD: 1v
9RD/GNA/T-ECT Solenoid (SL)In Lockup: 12-14v
10BK/YLIgniter Signal (IGF)Digital Signal: 0-5-0v
11BK/BLIgniter Transistor 1 Control6°, 55 mph: 8° dwell
12BK/WTIgniter Transistor 2 Control6°, 55 mph: 8° dwell
13BL/RDIgniter Transistor 3 Control6°, 55 mph: 8° dwell
14BL/YLIgniter Transistor 4 Control6°, 55 mph: 8° dwell
15BK/RDIAC Control (RSD)Pulse Signals
21WT/BKPower Ground (E01)<0.1v
26YL/RDA/T Oil Temperature SensorAt 68°F: 4-5v
28GYKnock Sensor Signal<0.075v AC
31WT/BKPower Ground (E02)<0.1v


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Fig.

PCM Pin #Wire ColorCircuit Description (22 Pin)Value at Hot Idle
1BK/YLDirect Battery12-14v
2RD/BKA/T Select Switch ReverseIn 'R': 12v, Others: 0v
3PK/WTA/T Select Switch LowIn Low: 12v, Others: 0v
4PKA/T Select Switch 2ndIn 2nd: 12v, Others: 0v
5PKA/T Oil Temperature IndicatorLamp Off: 12v, On: 1v
6VT/RDMalfunction Indicator Lamp (MIL) ControlMIL Off: 12v, On: 1v
7GNStarter Switch Signal (STA)In P/N: 9-11v (cranking)
8---Not Used---
9BLA/T Park (lamp) IndicatorLamp Off: 12v, On: 1v
10BL/ORO/D OFF Indicator (ODLP)Lamp Off: 12v, On: 1v
11BR/YLA/T Select Switch DriveIn 'D': 12v, Others: 0v
12WTSIL (Scan Tool) Signal12v
13BL/YLA/C Amplifier Signal (AC1)Clutch On: 1.5v, Off: 12v
14BL/BKA/C Amplifier Signal (ACT)Clutch On: 12v, Off: 1.5v
15GN/WTStop Light Switch SignalBrake Off: 0v, On: 12v
16WT/RDEFI Main Relay (B+)12-14v
17GNA/T Pattern Select SwitchNorm: 0v, PWR: 12v
18-19---Not Used---
20GN/RDTaillight Switch Signal (ELS)Switch Off: 0v, On: 12v
21GN/ORSpeedometer Indicator (SP1)At 55 mph: 48 Hz
22BK/RDA/T: Neutral Start Signal (NSW)In P/N: 9-11v (cranking)


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Fig.

PCM Pin #Wire ColorCircuit Description (28 Pin)Value at Hot Idle
1-4---Not Used---
5LG/RDCruise Control ECU (IDLO)1.5v, off-idle: 12v
6WT/BLCircuit Opening Relay (FC)0-3v, at off-idle: 12v
7YL/BKDLC 7 Signal (TC)12v
8RD/YLEVAP Vapor Pressure Sensor (PTNK)2.5-3.1v (with fuel cap off)
9-12---Not Used---
13LG/BKTachometer Signal (TACO)Pulse Signals
14-24---Not Used---
25GNOD Main Switch (ODMS)Switch Off: 12v, On: 1v
26-27---Not Used---
28YLPSP Switch Signal (PSSW)Straight: 12v, Turning: 0v


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Fig.

PCM Pin #Wire ColorCircuit Description (24 Pin)Value at Hot Idle
1RD/BLEVAP Closed Canister Vent (VSV)12v or 0v
2GN/YLSensor VREF (VC)4.9-5.1v
3RD/WTHO2S-12 (B1 S2) Heater (HTS)Heater Off: 0v, On: 12v
4WTAFS-11 (B1 S1) Heater (AFHT)Heater Off: 0v, On: 12v
5---Not Used---
6WT/GNEVAP Purge Solenoid (VSV)12v or 0v
7GN/BKEVAP Vapor Pressure (VSV)12v or 0v
8---Not Used---
9YLTP Sensor Signal (VTA)0.3-0.8v
10BKHO2S-12 (B1 S2) Signal (OXS)0.1-1.1v
11VTAFS-11 (B1 S1) Signal (AF+)Fixed at 3.3v
12GN/RDECT Sensor Signal (THW)At 180°F: 0.51v
13---Not Used---
14GYMAF Sensor Signal (VG)1.1-1.8v
15RDCMP Sensor Signal (G2+)AC pulse signals
16BLCKP Sensor Signal (NE+)AC pulse signals
17BRShield Ground (E1)<0.050v
18BL/BKSensor Ground (E2)<0.050v
19---Not Used---
20PKAFS-11 (B1 S1) Signal (AF-)Fixed at 3.3v
21YL/GNIAT Sensor Signal (THA)At 100°F: 2.60v
22BK/WTMAF Sensor Ground (E2G)<0.050v
23---Not Used---
24GNCKP/CMP Sensor Signal (NE-)<0.050v


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Fig.

PCM Pin #Wire ColorCircuit Description (31 Pin)Value at Hot Idle
1WT/RDInjector 1 Control2.0-3.3 ms
2WTInjector 2 Control2.0-3.3 ms
3RDInjector 3 Control2.0-3.3 ms
4RD/BLInjector 4 Control2.0-3.3 ms
5WT/BKPower Ground (E03)<0.1v
6WT/BKPower Ground (E04)<0.1v
7PK/YLA/T-ECT Solenoid (S1)3rd or OD: 1v
8LGA/T-ECT Solenoid (S2)1st or OD: 1v
9RD/GNA/T-ECT Solenoid (SL)In Lockup: 12-14v
10BK/YLIgniter Signal (IGF)Digital Signal: 0-5-0v
11BK/BLIgniter Transistor 1 Control6°, 55 mph: 8° dwell
12BLIgniter Transistor 2 Control6°, 55 mph: 8° dwell
13BL/RDIgniter Transistor 3 Control6°, 55 mph: 8° dwell
14BL/YLIgniter Transistor 4 Control6°, 55 mph: 8° dwell
15BK/RDIdle Air Control Valve (RSO)Pulse Signals
16-20---Not Used---
21WT/BKPower Ground (E01)<0.1v
22-25---Not Used---
26YL/RDA/T Oil Temperature SensorAt 68°F: 4-5v
27---Not Used---
28BKKnock Sensor Signal (KNK)<0.075v AC
29-30---Not Used---
31WT/BKPower Ground (E02)<0.1v
 
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