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Pin Voltage Chart

ECU HARNESS TERMINAL PIN VOLTAGE

Pin No. Item & Condition Voltage
1 Ignition Signal-Engine at Idle 0.3-0.5V
" Ignition Signal-Engine at 2000 RPM Approx. 0.7V
3 Ignition Check-Engine at Idle Approx. 12V
4 ECCS Relay (Self-Shutoff)-Eng. Running (1) 0-1V
" ECCS Relay (Self-Shutoff)-Ign. OFF (2) 0-1V
8 Exhaust Gas Temp. Sensor-Eng. @ Idle/Warm Less than 4.5V
" Exhaust Gas Temp. Sensor-Eng. @ Idle/Warm EGR System is operating 0-1.0V
9 Radiator Fan Relay (Low)-Engine Running (3) 11-14V
" Radiator Fan Relay (Low)-Engine Running (4) 0.6-0.8V
10 Radiator Fan Relay (High)-Engine Running(3) 11-14V
" Radiator Fan Relay (High)-Engine Running(4) 0.6-0.8V
11 A/C Relay-Eng. Running (A/C & Blower ON) 0.6-0.8V
" A/C Relay-Eng. Running (A/C OFF) Battery Voltage
16 Air Flow Meter-Eng. @ Idle/Warm 1.3-1.7V
" Air Flow Meter-Eng. at 2000 RPM 1.7-2.1V
18 Engine Temp. Sensor-Engine Running (5) 0-5V
19 Exhaust Gas Sensor-Eng. at 2000 RPM/Warm 0-1V
20 Throttle Sensor-Ign. ON/Accelerator Pedal Released 0.45-0.55V
" Throttle Sensor-Ign. OFF/Accelerator Pedal Fully Depressed Approx. 4V
22 Crank Angle Sensor (Ref. Signal) (6) 0.2-0.5V
27 Detonation Sensor-Engine at Idle 2.0-3.0V
30 Crank Angle Sensor (Ref. Signal) (6) 0.2-0.5V
31 Crank Angle Sensor (Pos. Signal) (6) 2.0-3.0V
34 Start Signal-Ign. Switch ON Start Signal-Ign. Switch in START Approx. 0V Battery Voltage
35 Neutral Switch (M/T)-Ign. ON, in Neutral 0V
" Neutral Switch (M/T)-Ign. ON, in Gear Battery Voltage
35 Inhibitor Switch (A/T)-Ign. ON, in N or P 0V
" Inhibitor Switch (A/T)-Ign. ON, in Gear Battery Voltage
36 Ignition Switch-Ign. OFF 0V
" Ignition Switch-Ign. ON Battery Voltage
37 Throttle Sensor Power Supply-Ign. ON Approx. 5V
38 ECU Power Supply-Ign. ON Battery Voltage
40 Crank Angle Sensor (Pos. Signal) (6) 2.0-3.0V
41 A/C Switch-Ign. ON (A/C & Blower ON) Approx. 0V
" A/C Switch-A/C is OFF Battery Voltage
43 Power Steering Oil Pressure Switch-Eng. Running-Steering Wheel is Being Turned Approx. 0V
" Power Steering Oil Pressure Switch-Eng. Running-Steering Wheel is Not Being Turned 7-10V
46 Power Supply (Back-up)-Ign. OFF Battery Voltage
47 ECU Power Supply-Ign. ON Battery Voltage
101 Injector No. 1-Engine is Running Battery Voltage
102 A.I.V. Control Solenoid Valve Eng. @ Idle/Warm 0.6-0.8V
" A.I.V. Control Solenoid Valve-Eng. Running (Warm) With Accelerator Pedal Depressed Battery Voltage
103 Injector No. 2-Engine is Running Battery Voltage
104 Fuel Pump Relay-Eng. Running, Reading for 5 Seconds After Turning Ign. ON 0.7-0.9V
" Fuel Pump Relay-Ign. ON, Reading 5 Seconds After Turning Ign. ON Battery Voltage
105 EGR & Canister Control Solenoid Valve Engine Running @ 2000 RPM/Warm 11-14V
" EGR & Canister Control Solenoid Valve Engine Running @ 4000 RPM/Warm 0.6-0.8V
110 Injector No. 3-Engine is Running Battery Voltage
111 Exhaust Gas Sensor Heater-Below 3000 RPM 0V
" Exhaust Gas Sensor Heater-Above 3000 RPM 11-14V
112 Injector No. 4-Engine is Running Battery Voltage
113 A.A.C. Valve-Engine at Idle 9-14V
" A.A.C. Valve-Engine Running (7) 5-9V
(1) Voltage reading for approximately 2 seconds after turning ignition switch off.
(2) Voltage reading approximately 2 seconds after turning ignition switch off.
(3) Radiator fan on.
(4) Radiator fan off.
(5) Varies with temperature.
(6) Engine is running under no load (do not run at high speed).
(7) Steering wheels is being turned, A/C is on, rear defogger is on and headlamps on in high position.