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Pin Voltage Charts

ECU Harness Connector Terminal Pin Voltage Table

Pin No. Item & Condition Voltage
1 Ignition Signal-Engine at Idle 0.4-0.6V
" Ignition Signal-Engine at 2000 RPM 1.3-1.4V
2 Ignition Check-Engine at Idle Battery Voltage
4 A.A.C. Valve-Engine at Idle 9-12V
" A.A.C. Valve-Engine at Idle (1) 5-9V
9 A/C Relay-Engine Running (A/C OFF) Battery Voltage
" A/C Relay-Engine Running (A/C ON) 0.7-0.9V
16 ECU Power Source-Engine at Idle 0.8-1.0V
" ECU Power Source-Engine OFF (2) 0.8-1.0V
18 Fuel Pump Relay-Engine Running (3) Battery Voltage
" Fuel Pump Relay-Engine Running (4) Battery Voltage
19 Air Regulator-Ign. ON (5) 0.7.0.9V
" Air Regulator-Ign. ON (6) Battery Voltage
23 Detonation Sensor-Engine at Idle 3.5-4.0V
27 Air Flow Meter-Engine Warm at Idle 1.0-1.5V
" Air Flow Meter-Engine Warm at 2000 RPM 1.4-1.9V
28 Engine Temp. Sensor-Engine Running (7) 0-5.0V
29 Exhaust Gas Sensor-Engine Warm at 2000 RPM 0-1.5V
36 Fuel Temp. Sensor-Engine Running (7) 0.5.0V
38 Throttle Sensor-Ign. ON (8) 0.4-4.0V
39 Exhaust Gas Temp. Sensor-Eng. @ Idle/Warm Less than 4.5V
41 Crank Angle Sensor (Ref. Signal) (9) (10) 0.3-0.5V
42 Crank Angle Sensor (Pos. Signal) (9) (10) 2.5-2.7V
43 Start Signal-Ign. Switch ON Approx. 0V
" Start Signal-Ign. Switch in START Battery Voltage
44 A/T Control Unit-Ign. ON in N or P Approx. 0V
" A/T Control Unit-Ign. ON in Gear 7.0-9.0V
45 Ignition Switch-Ign. ON/Engine OFF Battery Voltage
46 A/C Switch-Engine Running (A/C OFF) 7.0-9.0V
" A/C Switch-Engine Running (A/C ON) 0.5-0.7V
48 Power Source for Sensors-Ign. ON/Engine OFF Approx. 5V
49 Power Supply-Ign. ON/Engine OFF Battery Voltage
51 Crank Angle Sensor (Ref. Signal) (9) (10) 0.3-0.5V
52 Crank Angle Sensor (Pos. Signal) (9) (10) 2.5-2.7V
54 Throttle Valve Switch-Ign. ON (11) 8.0-10.0V
" Throttle Valve Switch-Ign. ON (12) 0V
57 Power Source/Idle Switch-Ign. ON/Engine OFF 8.0-10.0V
59 Power Supply-Ign. ON/Engine OFF Battery Voltage
101 Injector-Ign. OFF Battery Voltage
102 EGR Cont. Solenoid Valve-Eng. @ Idle/Warm 0.7-0.8V
" EGR Cont. Solenoid Valve- Eng. @ 2000 RPM Warm 11-14V
" EGR Cont. Solenoid Valve- Eng. @ 3100+ RPM Warm 0.8-0.9V
103 Injector-Ign. OFF Battery Voltage
104 Fuel Pump Voltage Control-Ign. ON (5) Approx. 0.1V
" Fuel Pump Voltage Control (13) Approx. 0.5V
" Fuel Pump Voltage Control (14) 2.0-4.5V
105 Injector-Ign. OFF Battery Voltage
110 Injector-Ign. OFF Battery Voltage
111 PRVR Control Solenoid Valve (15) (16) 0-1.0V
" PRVR Control Solenoid Valve (15) (17) 11-14V
" PRVR Control Solenoid Valve (18) Battery Voltage
112 Injector-Ign. OFF Battery Voltage
114 Injector-Ign. OFF Battery Voltage
(1) A/C and rear defogger are on. Headlights in HIGH position.
(2) For a few secondes after turning ignition switch OFF.
(3) Normal condition.
(4) Abnormal condition (fuel pump voltage control circuit ECU terminal No. 104 is inoperative.
(5) For 5 seconds after turning ignition switch ON.
(6) Five seconds after turning ignition switch ON.
(7) Varies with temperature.
(8) Varies with throttle valve opening angle.
(9) Do not run engine at high speed under no load.
(10) Output voltage varies slightly with engine speed.
(11) Accelerator pedal is fully released (engine running).
(12) Accelerator pedal is depressed (engine running).
(13) For 30 seconds after engine begins to run.
(14) Racing engine (up to 4,000 RPM).
(15) Stop and restart engine after warming it up. Fuel temperature is above 75°C (167°F).
(16) For 3 minutes after restarting engine.
(17) Three minutes after restarting engine.
(18) Stop and restart engine after warming it up. Fuel temperature is below 75°C (167°F).
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