Pin Voltage Charts
NOTE:
Unless stated otherwise in testing procedures, perform all resistance and voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance. Voltage readings may vary slightly due to battery condition or charging rate.
ECM PIN VOLTAGE CHART (2.0L)
| Component/Circuit (VAG 1598/18 Pin No) | Test Conditions/ Additional Steps (1) | Specified Value Or Test Result | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Voltage Supply - Control Module (1, 54) | Ignition Off | Battery Voltage | ||||||||||
| Voltage Supply - Control Module Relay (1, 23) | (2) Ignition Off | Battery Voltage | ||||||||||
| Wiring To Fuel Pump Relay (6, 55 - Jumper) | Ignition On | Fuel Pump Must Operate | ||||||||||
| Heated Oxygen Sensor Relay (1, 28 - Briefly Jumper) | (2) Ignition On | Relay Must Operate (Click) | ||||||||||
| Malfunction Indicator Light (5, 55 - Jumper) | Ignition On | MIL Must Illuminate | ||||||||||
| Vehicle Speed Sensor (1, 65) | Ignition On, Select "D" or "N" & Raise & Rotate Left Front Wheel | Fluctuates Between Zero & 4 Volts Minimum | ||||||||||
| Ground Wire No. 58 Control Module - A/T (54, 58) | Ignition Off | Battery Voltage | ||||||||||
| Ground Wire No. 7 - A/T (7, 54) | Ignition On, Select "P" Or "N" Select "1", "2", "3", "D", Or "R" | Zero Or .5 Volt Max. | ||||||||||
| Wire No. 39 From A/C (39, 55) | Ignition On, Fan Switch On & A/C Switch On | Battery Voltage | ||||||||||
| Wire No. 37 From A/C Compressor (37, 38 - Briefly Jumper) | Ignition On | A/C Magnetic Clutch Operates | ||||||||||
| Fuel Injector No. 1 (23, 24) | Ignition Off | 14-21.5 Ohms | ||||||||||
| Fuel Injector No. 2 (2, 23) | Ignition Off | 14-21.5 Ohms | ||||||||||
| Fuel Injector No. 3 (23, 25) | Ignition Off | 14-21.5 Ohms | ||||||||||
| Fuel Injector No. 4 (23, 26) | Ignition Off | 14-21.5 Ohms | ||||||||||
| EVAP Regulator Valve (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 (1 (4) , 43) | Ignition Off | 1.5 Ohms Maximum | ||||||||||
| Wiring To Heated Oxygen Sensor (20, 42) | Disconnect Sensor Connector & Jumper Terminals No. 3 & No. 4 | 1.5 Ohms Maximum | ||||||||||
| " | Reconnect Sensor Conn. | Infinity (Open) | ||||||||||
| Throttle Position Sensor (33, 41) | Ignition Off | 1600-2400 Ohms | ||||||||||
| Throttle Position Sensor (33, 40) | Throttle Closed | 1000-2000 Ohms | ||||||||||
| " | Throttle Slowly Opened | Steady Increase In Resistance | ||||||||||
| Throttle Position Sensor (40, 41) | Throttle Closed | 2500-4000 Ohms | ||||||||||
| " | Throttle Slowly Opened | Steady Decrease In Resistance | ||||||||||
| Wiring To CMP Sensor (44, 56) | Disconnect Sensor Connector & Jumper Terminals No. 1 & No. 2 | 1.5 Ohms Maximum | ||||||||||
| Wiring To CMP Sensor (41, 56) | Jumper Terminals No. 1 & No. 3 | 1.5 Ohms Maximum | ||||||||||
| Wiring To Ignition Coil Power Output Stage (8, 55) | Disconnect Output Stage Connector | Infinity (Open) | ||||||||||
| Wiring To Ignition Coil Power Output Stage (8, 38) | Disconnect Output Stage Connector | Infinity (Open) | ||||||||||
| Wiring To Ignition Coil Power Output Stage (8, 55) | Jumper Terminals No. 1 & No. 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 (33, 34) | Disconnect Sensor Connector | Infinity (Open) | ||||||||||
| Wiring To Knock Sensor (34, 56) | Jumper Terminals No. 1 & No. 3 | 1.5 Ohms Maximum | ||||||||||
| Intake Air Temp. Sensor (33, 36) | (3) Ignition Off | (3) | ||||||||||
| Wiring To Idle Air Control Valve (27, 53) | Ignition Off | 7-10 Ohms | ||||||||||
| " | Disconnect Control Valve Connector | Infinity (Open) | ||||||||||
| Wiring To Mass Airflow Sensor (1, 16) | Disconnect Sensor Connector | 1.5 Ohms Maximum | ||||||||||
| Wiring To Mass Airflow Sensor (1, 23) | Jumper Terminals No. 1 & No. 3 | 1.5 Ohms Maximum | ||||||||||
| Wiring To Mass Airflow Sensor (1, 17) | Jumper Terminals No. 1 & No. 4 | 1.5 Ohms Maximum | ||||||||||
| Wiring To Engine Speed Sensor (67, 68) | Ignition Off | 500-700 Ohms | ||||||||||
| Wiring To Engine Speed Sensor (56, 67) | Ignition Off | Infinity (Open) | ||||||||||
| Wiring To Engine Speed Sensor (56, 68) | Ignition Off | Infinity (Open) | ||||||||||
| Wiring To Engine Speed Sensor (56, 67) | Disconnect Sensor Connector | 1.5 Ohms Maximum | ||||||||||
| Wiring To Engine Speed Sensor (56, 67) | Jumper Terminals No. 1 & No. 3 | 1.5 Ohms Maximum | ||||||||||
| Wiring To Engine Speed Sensor (56, 68) | Jumper Terminals No. 2 & No. 3 | 1.5 Ohms Maximum | ||||||||||
| EGR Frequency Valve (If Equipped) (9, 56 Briefly Jumper) | (5) Ignition Off | Valve Must Operate (Click) | ||||||||||
| EGR Frequency Valve Wiring (23, 30) | Ignition Off | 27-31 Ohms | ||||||||||
| " | Disconnect Valve Connector | Infinity (Open) | ||||||||||
| " | Jumper Terminals No. 1 & No. 2 | 1.5 Ohms Maximum | ||||||||||
| EGR Temp. Sensor (15, 33) | Disconnect Sensor Connector | Infinity (Open) | ||||||||||
| " | Jumper Terminals No. 1 & No. 2 | 1.5 Ohms Maximum | ||||||||||
|
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ECM PIN VOLTAGE CHART (2.8L)
| Component/Circuit (VAG 1598/18 Terminal No.) | Test Conditions/ Additional Steps (1) | Specified Value Or Test Result | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Voltage Supply - Control Module (1, 54) | Ignition Off | Battery Voltage | ||||||||||||||
| Voltage Supply - Control Module Relay (1, 23) | (2) Ignition Off | Battery Voltage | ||||||||||||||
| Wiring To Fuel Pump Relay (6, 55 - Jumper) | Ignition On | Fuel Pump Must Operate | ||||||||||||||
| Heated Oxygen Sensor Relay (1, 28 - Briefly Jumper) | (2) Ignition On | Battery Voltage | ||||||||||||||
| Malfunction Indicator Light (5, 10 - Jumper) | Ignition On | MIL Must Illuminate | ||||||||||||||
| Ground Wire No. 7 - M/T (7, 54) | Ignition Off | Battery Voltage | ||||||||||||||
| Wiring To Starter Relay - A/T (1, 7) | Select "P", Disconnect Ignition Coil & Operate Sterter | Approximately 10 Volts | ||||||||||||||
| Vehicle Speed Sensor (56, 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 (15 (4) , 21) | Ignition Off | 1.5 Ohms Maximum | ||||||||||||||
| Wiring To White Data Link Connector (7 (4) , 43) | Ignition Off | 1.5 Ohms Maximum | ||||||||||||||
| Wiring To Oxygen Sensor (20, 42) | Disconnect Sensor Connector & Jumper Terminals No. 3 & No. 4 | 1.5 Ohms Maximum | ||||||||||||||
| " | Reconnect Sensor Connector | Infinity (Open) | ||||||||||||||
| Throttle Position Sensor (33, 41) | Ignition Off | 1500-2500 Ohms | ||||||||||||||
| Throttle Position Sensor (33, 40) | Throttle Valve Closed | 700-1300 Ohms | ||||||||||||||
| " | Throttle Valve Opened | Resistance Must Increase | ||||||||||||||
| Throttle Position Sensor (40, 41) | Throttle Valve Closed | 2500-3500 Ohms | ||||||||||||||
| " | Throttle Valve Opened | Resistance Must Decrease | ||||||||||||||
| Wiring To CMP Sensor (23, 56) | Disconnect Sensor Connector & Jumper Terminals No. 1 & No. 3 | 1.5 Ohms Maximum | ||||||||||||||
| Wiring To Hall Effect Sensor (44, 56) | Jumper Terminals No. 2 & No. 3 | 1.5 Ohms Maximum | ||||||||||||||
| Wiring To Ignition Power Output Stage (8, 55) | Disconnect Output Stage Connector & Jumper Terminals No. 1 & No. 2 | 1.5 Ohms Maximum | ||||||||||||||
| Wiring To Ignition Coil (55, 60) | Disconnect Output Stage Connector & Jumper Terminals No. 1 & No. 3 | 1.5 Ohms Maximum | ||||||||||||||
| Wiring To Ignition Coil (52, 55) | Disconnect Output Stage Connector & Jumper Terminals No. 1 & No. 4 | 1.5 Ohms Maximum | ||||||||||||||
| Wiring To Ignition Coil (38, 55) | Disconnect Output Stage Connector & Jumper Terminals No. 1 & No. 5 | 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 (16, 17) | Disconnect Sensor Connector & Jumper Terminals No. 1 & 4 | 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 & Jumper Terminals No. 1 & No. 2 | 1.5 Ohms Maximum | ||||||||||||||
| EGR Temp. Sensor (15, 33) | (3) | (3) | ||||||||||||||
| Secondary Air Injection Pump Relay (9 & 55) | Briefly Jumper Terminals No. 1 & No. 49 | Relay Must Click | ||||||||||||||
| Secondary Air Injection Pump Relay (9 & 55) | Briefly Jumper Terminals No. 1 & No. 49 | Motor Must Operate | ||||||||||||||
| Secondary Air Injection Pump Relay (9 & 55) | Briefly Jumper Terminals No. 1 & No. 50 | Valve Must Operate | ||||||||||||||
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