Toyota Celica, Corolla, ECHO & MR2 1999-05

Connector Pin Identification 2

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Fig.

PCM Pin #Wire ColorCircuit Description (35 Pin)Value at Hot Idle
1WTKnock Sensor Signal (KNK1)<0.075v AC
4BK/RDHO2S-11 (B1 S1) Heater1v (Heater On)
5BRPower Ground (E03)<0.1v
7BLGenerator Control Signal12-0-12v
8BKA/T Neutral Start Switch (NSW)Cranking: 9-11v
9BK/YLStarter Switch Signal (STA)9-11v (cranking)
12BK/WTA/T-ECT Solenoid (ST)Pulse Signals
13GNA/T-ECT Solenoid (SL)In Lockup: 12-14v
14WT/RDA/T: ECT Solenoid (S2)1st or OD: 1v
15WT/GNA/T-ECT Solenoid (S1)In 3rd or OD: 1v
21BKHO2S-12 (B1 S2) Signal0.1-1.1v
23WTHO2S-11 (B1 S1) Signal0.1-1.1v
24PKMAF Sensor Signal (VG)1.1-1.5v
27RDTurbine Speed Sensor (NT+)AC pulse signals
28BRPower Ground (EC)<0.1v
29VTPSP Switch SignalStraight: 12v, Turning: 0v
32VTMAF Sensor Ground (EVG)<0.050v
35BKTurbine Speed Sensor (NT-)AC pulse signals


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Fig.

PCM Pin #Wire ColorCircuit Description (28 Pin)Value at Hot Idle
3PK/GNCooling Fan 3 RelayRelay Off: 12v, On: 1v
4BLCooling Fan 2 RelayRelay Off: 12v, On: 1v
5PK/BKData Link Connector (TC)12-14v
6GNStop Light Switch SignalBrake Off: 0v, On: 12v
8BK/WTCenter Airbag AssemblyDigital Signals
10BLMultiplex Communication (1)Digital Signals
11BKStarter Switch Signal9-11v (cranking)
16RD/YLABS ECU SignalPulse Signals
18WT/BLA/C Dual Pressure SwitchA/C Off: 12v, On: 1v
21GYEFI Main Relay ControlRelay Off: 12v, On: 1v
22VT/WTSpeedometer IndicatorAt 55 mph: 48 Hz
23BL/WTEVAP Vapor Pressure (VSV)12v or 0v
27WTTachometer Signal (TACO)Pulse Signals
28WT/RDA/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
1BK/RDMAF Sensor Ground (EVG)<0.050v
2BL/RDSensor VREF (VC)4.9-5.1v
3BK/YLHO2S-11 (B1 S1) Heater1v (Heater On)
4WTEVAP Purge Solenoid (VSV)12v or 0v
5BK/WTHO2S-21 (B2 S1) Heater1v (Heater On)
6WT/BKPower Ground (E03)<0.1v
8BL/BKHO2S-12 (B1 S2) Heater1v (Heater On)
9BKHO2S-12 (B1 S2) Signal0.1-1.1v
10YLGenerator Control Signal (L)12v
11VTMAF Sensor Signal1-3v
12BKHO2S-11 (B1 S1) Signal0.1-1.1v
14RD/BLECT Sensor Signal1-4v (varies with temp.)
15WTCMP Sensor Signal (G2+)AC pulse signals
16WTCKP Sensor Signal (NE+)AC pulse signals
17BRPower Ground (E1)<01v
18BRSensor Ground (E2)<0.050v
21BKHO2S-21 (B2 S1) Signal0.1-1.1v
22YL/BKIAT Sensor Signal1-4v (varies with temp.)
23YL/GNTP Sensor Signal1.1-1.9v
24BKCKP/CMP Sensor Ground (-)<0.050v


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Fig.

PCM Pin #Wire ColorCircuit Description (22 Pin)Value at Hot Idle
1BK/YLBattery Direct12-14v
2WT/GNImmobilizer Security IndicatorLED Off: 0v, On: 12v
3GN/RDCircuit Opening Relay (FC)0-3v, off-idle: 12v
4GN/BKEVAP Vapor Pressure Sensor2.9-3.1v (with hose off)
6BKMultiplex Communication (2)Digital Signals
8BK/RDIgnition Switch Power12-14v
11WT/GNSIL Signal (Scan Tool)Digital Signal
12BLA/C Magnetic Clutch (ACMG)Clutch Off: 0v, On: 12v
15YL/RDMIL (lamp) ControlMIL Off: 12v, On: 1v
16BKEFI Main Relay Power12-14v


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Fig.

PCM Pin #Wire ColorCircuit Description (31 Pin)Value at Hot Idle
1BK/WTInjector 1 Control2.0-3.3 ms
2BKInjector 2 Control2.0-3.3 ms
3BLInjector 3 Control2.0-3.3 ms
4WTInjector 4 Control2.0-3.3 ms
6RD/YLEngine Throttle Control Power12-14v
7GN/RDThrottle Control Motor (CL-)Pulse Signals
8, 31WT/BKPower Ground (ME01, ME2)<0.1v
9GYMotor Control Shield Ground<0.050v
10BKIgniter Transistor 1 ControlDigital Signal: 0-5-0v
11BLIgniter Transistor 2 ControlDigital Signal: 0-5-0v
12BL/WTIgniter Transistor 3 ControlDigital Signal: 0-5-0v
13BLIgniter Transistor 4 ControlDigital Signal: 0-5-0v
17BLEVAP Canister Closed Valve12v or 0v
18GNIAC Valve Signal (RSO)Pulse Signals
19RDThrottle Control Motor (M+)Pulse Signals
20YL/RDThrottle Control Motor (CL+)Pulse Signals
21WT/BKPower Ground (E01)<0.1v
22YL/BKOIL Pressure SwitchClosed: 1v, Open: 12v
23WTCamshaft Timing Oil Control Valve (-)AC pulse signals
24RDCamshaft Timing Oil Control Valve (+)AC pulse signals
25BK/YLIgniter Signal (IGF)Pulse signal: 0-5-0v
27BKKnock Sensor Signal<0.075v AC
29GNThrottle Control Motor (M-)Pulse Signals
 
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