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Pin Voltage Charts

WARNING: Ensure throttle motor harness connector is disconnected before touching secondary throttle valve, as injury may occur from accidental valve actuation.
ECU HARNESS CONNECTOR TERMINAL PIN VOLTAGE

Pin No. Item & Condition Voltage
1-3 Ignition Signal-Engine at Idle Approx. 70mV
" Ignition Signal-Engine at 2000 RPM Approx. 0.14V
6 Fuel Pump Voltage Control-Ign. ON (1) Approx. 1.9V
" Fuel Pump Voltage Control-Ign. ON (2) Approx. 0V
" Fuel Pump Voltage Control-Eng. @ Idle/Warm 1.9-2.0V
7 Tachometer-Engine At Idle Approx. 1.5V
" Tachometer-Engine At 2000 RPM Approx. 3.1V
8 Canister Vacuum Control Solenoid Valve-Ignition ON Approx. 0.8V
" Canister Vacuum Control Solenoid Valve-Engine at Idle Approx. 0.8V
" Canister Vacuum Control Solenoid Valve-Engine Warm at 2000 RPM in "1" Range 11-14V
9 A/C Relay-Engine Running (A/C ON) Approx. 0V
" A/C Relay-Engine Running (A/C OFF) Battery Voltage
11-15 Ignition Signal-Engine at Idle Approx. 70mV
" Ignition Signal-Engine at 2000 RPM Approx. 0.14V
16 ECCS Relay (Self Shut-off) (3) 0-1V
" ECCS Relay (Self Shut-off) (4) Battery Voltage
18 Fuel Pump Relay-Ign. ON (5) Approx. 0.8V
" Fuel Pump Relay-Ign. ON (6) 11-14V
" Fuel Pump Relay-Engine Running Approx. 0.9V
19 Fuel Pump Voltage Control-Ign. ON (1) Approx. 1.9V
" Fuel Pump Voltage Control-Ign. ON (2) Approx. 0V
" Fuel Pump Voltage Control-Eng. @ Idle/Warm 1.9-2.0V
23,24 Detonation Sensor-Engine at Idle Approx. 2.5V
27 Air Flow Meter-Engine Warm at Idle 1.0-1.4V
" 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 R.H.- Eng. Warm at 2000 RPM 0-1.0V
36 TCS Signal-Ignition ON (8) Approx. 9V
" TCS Signal-Ignition ON (8)(9) Approx. 0V
37 Secondary Throttle Sensor-Ign. ON (10) Approx. 3.4V
" Secondary Throttle Sensor (8)(9) Approx. 0.4V
38 Throttle Sensor-Engine Running Warm (11) 0.4-4V
39 Exhaust Gas Temp. Sensor- Engine Warm at Idle Less than 4.5V
" Exhaust Gas Temp. Sensor- Engine Warm/EGR System is operating 0-1.0V
40 Power Steering Oil Press. Switch (12) Approx. 0V
" Power Steering Oil Press. Switch (13) Battery Voltage
41 Crank Angle Sensor (Ref. Signal) (14) 0.8-1.0V
42 Crank Angle Sensor (Pos. Signal) (14) (15) 2.4-2.7V
43 Start Signal-Ignition Switch ON Approx. 0V
" Start Signal-Ignition Switch in START Battery Voltage
44 Inhibitor Switch-Ign. ON/Gear Pos. N or P Approx. 0V
" Inhibitor Switch-Ign. ON/in Gear Position Other than N or P 8-10V
45 Ignition Switch-Ign. OFF Approx. 0V
" Ignition Switch-Ign. ON Battery Voltage
46 A/C Switch-Eng. Running with A/C ON 0.5-0.7V
" A/C Swithc-Eng. Running with A/C OFF 7-10V
48 Power Source for Sensors-Ign. ON Approx. 5V
49 Power Supply-Engine Running Battery Voltage
51 Crank Angle Sensor (Ref. Signal) (14) 0.8-1.0V
52 Sub-Crank Angle Sensor (14) 0-10mV
54 Throttle Valve Switch-Eng. Running Warm Accelerator Pedal Fully Released Battery Voltage
" Throttle Valve Switch-Eng. Running Warm Accelerator Pedal Depressed Approx. 0V
55 Exhaust Gas Sensor L.H.- Eng. Warm at 2000 RPM 0-1.0V
56 Throttle Opening Signal-Ignition ON (11) 0.3-3.3V
58 Battery-Ignition OFF Battery Voltage
59 Power Supply-Engine Running Battery Voltage
101 Injector-Engine Running Battery Voltage
102 EGR Vacuum Control Solenoid Valve-Engine Warm at Idle Approx. 0V
" EGR Vacuum Control Solenoid Valve-Engine Warm at 2000 RPM Battery Voltage
103 Injector-Engine Running Battery Voltage
104 Valve Timing Control Solenoid Valve-Engine at Idle Battery Voltage
" Valve Timing Control Solenoid Valve-Engine Running (16) Approx. 0V
105 Injector-Engine Running Battery Voltage
106 Injector-Engine Running Battery Voltage
110 Injector-Engine Running Battery Voltage
111 A.A.C. Valve-Engine at Idle 10-11V
" A.A.C. Valve-Engine Running (17) 6-9V
112 Injector-Engine Running Battery Voltage
113 Injector-Engine Running Battery Voltage
114 Injector-Engine Running Battery Voltage
115 Exhaust Gas Sensor Heater-Engine Running Below 2250 RPM Approx. 0V
" Exhaust Gas Sensor Heater-Engine Running Above 2250 RPM Battery Voltage
(1) For 5 seconds after turning ignition switch ON.
(2) Five seconds after turning ignition switch ON.
(3) Run engine, turn off ignition. Take voltage reading after 6 seconds.
(4) Run engine, turn off ignition. Voltage reading is within 6 seconds of turning off switch.
(5) For 5 seconds after turning switch ON.
(6) Five seconds after turning switch ON.
(7) Varies with temperature.
(8) 1991 models only.
(9) Disconnect throttle motor harness connector. Fully close secondary throttle valve by hand. See warning below.
(10) Take voltage reading about 3 seconds after turning ignitions switch on.
(11) Output voltage varies with throttle valve opening angle.
(12) Steering wheel is in the "straight ahead" position.
(13) Steering wheel is turned.
(14) Do not run engine at high speed under no-load.
(15) Output voltage varies slightly with engine speed.
(16) Quickly depress accelerator pedal, then quickly release it.
(17) Steering wheel is being turned, A/C is operating, rear defogger is on and headlamps are in high position.
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