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Pin Voltage Charts

NOTE: Disconnect harness connector from ECM. Connect Test Box (VAG 1598/18) to ECM harness connector, leaving ECM disconnected.
ECM PIN VOLTAGE CHART

Component/ Circuit Test Conditions/ Additional Steps (1) Specified Value Or Test Result
Voltage Supply - ECM (1, 54) Ignition Off Battery Voltage
Voltage Supply - ECM Relay (1, 23) (2) Ignition Off Battery Voltage
Wiring To Fuel Pump Relay (6, 55-Jumper) Ignition On Fuel Pump Must Operate
Heated O2 Sensor Relay (1, 28 - Briefly Jumper) (2) Ignition On Relay Must Operate (Click)
MIL (5, 55-Jumper) Ignition On MIL Must Illuminate
Ground Wire No. 7 - M/T (7, 23) Ignition Off Battery Voltage
Wiring To Starter Relay - A/T (1, 7) Select "P", Disconnect Ignition Coil Approximately 2 Volts
" Power Output Stage & Operate Starter Less Than Battery Voltage
Vehicle Speed Sensor (1, 65) Ignition On, Select "D" & Raise & Rotate Left Front Wheel Fluctuates Between Zero & 4 Volts Minimum
Wiring For A/C (39, 55) Ignition On, A/C Switch On Battery Voltage
Wiring To A/C Compressor (37, 38 - Jumper) Ignition On A/C Magnetic Clutch Operates
Fuel Injector No. 1 (23, 24) Ignition Off 15-21.5 Ohms
Fuel Injector No. 2 (3, 23) Ignition Off 15-21.5 Ohms
Fuel Injector No. 3 (23, 26) Ignition Off 15-21.5 Ohms
Fuel Injector No. 4 (4, 23) Ignition Off 15-21.5 Ohms
Fuel Injector No. 5 (23, 25) Ignition Off 15-21.5 Ohms
Fuel Injector No. 6 (2, 23) Ignition Off 15-21.5 Ohms
EVAP Solenoid Valve I (23, 31) Ignition Off 40-80 Ohms
Engine Coolant Temp. Sensor (14, 33) (3) Ignition Off (3)
Wiring To White Data Link Connector (1 (4) , 21) Ignition Off 1.5 Ohms Maximum
Wiring To White Data Link Connector (2 (4) , 43) Ignition Off 1.5 Ohms Maximum
Wiring To Oxygen Sensor (20, 42) Disconnect Sensor Connector & Jumper Terminals 3 & 4 1.5 Ohms Maximum
" Reconnect Sensor Connector Infinity (Open)
Throttle Position Sensor (33, 41) Ignition Off 1750 Ohms
TP Sensor (33, 40) Throttle Valve Closed 1150 Ohms
" Throttle Valve Opened Resistance Must Increase
TP Sensor (40, 41) Throttle Valve Closed 2700 Ohms
" Throttle Valve Opened Resistance Must Decrease
Hall Effect Sensor Wiring (1, 44) Disconnect Sensor Connector & Jumper Terminals 1 & 2 1.5 Ohms Maximum
Hall Effect Sensor Wiring (1, 23) Disconnect Sensor Connector & Jumper Terminals 1 & 3 1.5 Ohms Maximum
Wiring To Ignition Power Output Stage (8, 55) Disconnect Output Stage Connector & Jumper Terminals 1-2 1.5 Ohms Maximum
Wiring To Ignition Coil Power Output Stage (8, 38) Jumper Terminals No. 2 & No. 3 1.5 Ohms Maximum
Wiring To Knock Sensor I (33, 34)(5) Disconnect Sensor Connector Infinity (Open)
" Jumper Terminals No. 1 & No. 2 1.5 Ohms Maximum
Wiring To Knock Sensor I (34, 56) (5) Jumper Terminals No. 1 & No. 3 1.5 Ohms Maximum
Intake Air Temp. Sensor (33, 36) (3) Ignition Off (3)
Idle Air Control Valve (27, 53) Ignition Off 6-12 Ohms
Wiring To Knock Sensor II (7, 33)(6) Disconnect Sensor Connector Infinity (Open)
" Jumper Terminals No. 2 & No. 3 1.5 Ohms Maximum
Wiring To Knock Sensor II (56, 57) (6) Jumper Terminals No. 1 & No. 3 1.5 Ohms Maximum
Wiring To MAF Sensor (1, 16) Disconnect Sensor Connector & Jumper Terminals 1 & 2 1.5 Ohms Maximum
Wiring To MAF Sensor (1, 17) Jumper Terminals No. 1 & No. 3 1.5 Ohms Maximum
Wiring To MAF Sensor (56, 59) Jumper Terminals No. 1 & No. 4 1.5 Ohms Maximum
Wiring To MAF Sensor (1, 23) Jumper Terminals No. 1 & No. 5 1.5 Ohms Maximum
Engine Speed Sensor (67, 68) (7) Ignition Off 500-700 Ohms
Engine Speed Sensor (56, 67) (7) Ignition Off Infinity (Open)
Engine Speed Sensor (56, 68) (7) Ignition Off Infinity (Open)
EGR Frequency Valve (9, 56 - Jumper) Jumper Terminals No. 30 & No. 55 Of Test Box Valve Must Briefly Click
Wiring To EGR Frequency Valve (23, 30) Disconnect Valve Connector & Juymper Terminals 1 & 2 1.5 Ohms Maximum
EGR Temp. Sensor (15, 33) (3) (3)
(1) TESTING CONDITIONS: Disconnect harness connector from ECM. Connect Test Box (VAG 1598/18) to ECM harness connector, leaving ECM disconnected.
(2) With ignition off, jumper terminals No. 9 and 55 of test box.
(3) Refer to the I - SYSTEM/COMPONENT TESTS article or the K - SENSOR RANGE CHARTS article.
(4) These are terminal connectors at data link connector.
(5) 3-pin connector is located at rear of engine mount.
(6) 3-pin Black connector is located next to starter.
(7) 3-pin White connector is located next to starter.