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Pin Voltage Chart

PIN VOLTAGE CHART

ECM Pin  Circuit  Volts  Condition 
A1 Ground " "
A2 Injector 10-14 Ignition On
A3 ISC Actuator " "
A4 EGR Solenoid Vacuum Valve 10-14 Ignition On
A5 EVAP Canister Purge Valve 10-14 Ignition On
A6 Oxygen Sensor Heater 10-14 Ignition On
A7 Blank " "
A8 Blank " "
A9 Radiator Fan Relay 10-14 Ignition On
" " 0.3-1.0 Ignition On, Radiator Fan Running
A10 (1)Tank Pressure Control 10-14 Ignition On
A11 EFE Heater Relay 10-14 Ignition On
A12 Power Source 10-14 Ignition On
A13 Ground " "
A14 Ground " "
A15 Blank " "
A16 ISC Actuator " "
A17 Fuel Pump Relay 0.4-1.3 For 2 Sec. After Ign. On
" " 10-14 After 2 Sec. With Ign. On
A18 Main Relay 0.4-1 Ignition On
A19 Ign. Trigger Signal " "
A20 Ign. Fail-Safe Signal 10-14 Ignition On
A21 Duty Output Terminal 0 Ignition On
" " 10-14 Engine Running
A22 Malfunction Indicator Light (MIL) 0.5-2 Ignition On, Engine Off
" " 10-14 Engine Running
A23 ISC Actuator Relay 0.3-1 Ignition On
A24 Blank " "
A25 Power Source 10-14 Ignition On
A26 Power Source Back-Up Circuit 10-14 Ignition Off & On
B1 Power Source For Sensors 4.75- 5.25 Ignition On
B2 Camshaft Position (CMP) Sensor (Positive) 0.4-0.8 Ignition On
B3 MAP Sensor 3.3-4 Ignition On, Barometric Pressure 30 in. Hg
B4 Throttle Position (TP) Sensor 0.2-1 Ignition On, Throttle Valve Open Less Than .014"
" " 2.8-4.8 Ignition On, Throttle Valve Fully Open
B5 Blank " "
B6 Blank " "
B7 Engine Coolant Temp. (ECT) Sensor 0.55- 0.95 Ignition On, Coolant Temp. 176°F (80°C)
B8 Vehicle Speed Sensor (VSS) CyclesBetween0 & 4-6 Ignition On, LF Tire Turned Slowly, RF Tire Locked
B9 Sensor Ground 0 Ignition On
B10 Camshaft Position (CMP) Sensor (Negative) 0.4-0.8 Ignition On
B11 Heated Oxygen Sensor (HO2S) Cycles Above & Below 0.45 Engine Speed 2000 RPM Longer Than One Minute
B12 Fuel Level Signal 0.2-0.6 Ignition On, Full Position
" " 4-6 Ignition On, Empty Position
B13 Blank " "
B14 Intake Air Temp. (IAT) Sensor 2-2.7 (2)Ignition On
B15 Idle Switch (In ISC Actuator) 0-1 Ignition On, Throttle Valve Fully Closed
" " 4-6 Ignition On, Throttle Valve Open Above Idle
B16 TCM Park/Neutral Position Switch Signal 0 Ignition On, In "P" Or "N"
" " 10-14 Ign. On, In "D", "2" Or "L"
C1 P/S Pressure Switch 10-14 Ignition On
" " 0-1 (4)Engine Idling
C2 Electric Load Signal About 0 Ignition On, All Accessories Off
" " 10-14 Ignition On, All Accessories On
C3 Test Switch Terminal 10-14 Ignition On
C4 (3)(5)TCM Throttle Valve Open Signal 10-14 Idle
" " 0.2-0.4 WOT
C5 A/C Amplifier 10-14 Engine Running, A/C On
" " 0 Engine Running, A/C Off
C6 (3)(5)TCM Throttle Valve Open Signal 10-14 Idle
" " 0.2-0.4 WOT
C7 A/C On Signal 10-14 Engine Running, A/C On
" " 0-2 Engine Running, A/C Off
C8 Engine Start Switch 6-12 Engine Cranking
" (Engine Start Signal) 0 Engine Not Cranking
C9 Diagnosis Switch Terminal 10-14 Ignition On
C10 Blank " "
C11 DLC (Serial Data Terminal) 4-5 Ignition On
C12 (3)TCM Throttle Valve Open Signal 10-14 Idle
" " 0.2-0.4 WOT
(1) Fuel tank pressure control solenoid vacuum valve, if equipped.
(2) With sensor at ambient Temp. of 68°F (20°C).
(3) Automatic Transaxle only.
(4) Turn steering wheel back and forth to stops repeatedly.
(5) Voltage will vary between idle and WOT specification and at WOT will be at idle voltage.