GTI L4-2.0L Turbo (BPY) (2007)
Relay J757 terminal 2 for voltage.
Heated Oxygen Sensor
Engine Component Power Supply
(HO2S) G39 electrical
Relay J757 electrical harness
harness connector
connector terminal
terminal
4
2
Specified value: Battery voltage.
If the specification was not obtained:
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Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
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Check the electrical harness connector for damage, corrosion, lose or broken terminals.
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If necessary, repair the faulty wiring connection.
If the specification was obtained:
Checking Ground (GND) activation
If the manufacturers test box is being used. Perform the following step.
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Install the test box.
If the manufacturers test box is not being used. Perform the following step.
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Remove the Motronic Engine Control Module (ECM) J623.
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Using a multimeter, check the Heated Oxygen Sensor (HO2S) G39 electrical harness connector terminal 3 to the Motronic Engine Control Module
(ECM) J623 electrical harness connector T94 terminal 51 for an open circuit.
Heated Oxygen Sensor
Motronic Engine Control Module (ECM)
HO2S) G39 electrical harness
J623 electrical connector
connector terminal
T94 terminal or test box socket
3
51
Specified value: 1.5 Ohms max.
If the specification was not obtained:
-
Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
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Check the electrical harness connector for damage, corrosion, lose or broken terminals.
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If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring and if the voltage supply was OK:
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Replace the Motronic Engine Control Module (ECM) J623.
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Install the engine cover with air filter.
Final procedures
After the repair work, the following work steps must be performed in the following sequence:
1. Check the DTC memory. See: Testing and Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 03: Interrogating Fault Memory
2. If necessary, erase the DTC memory. See: Testing and Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 04: Reset/Delete
Diagnostic Data
3. If the DTC memory was erased, generate readiness code.
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End of diagnosis.