Checking Oxygen Sensor Wires
- Connect test box to control module wiring harness. Refer to «Test box, connecting for wiring test»(ref-255339-S34843680502007053000000) .
- Disconnect 6-pin harness connector to respective oxygen sensor
- Heated Oxygen Sensor (HO2S) -G39-, 6-pin harness connector (black) -1
- Heated Oxygen Sensor (HO2S) 2 -G108-, 6-pin harness connector (brown) -2-.
Note. Bank 1 = Cylinder bank 1, in direction of travel, right Bank 2 = Cylinder bank 2, in direction of travel, left
- Check wires between test box and 6-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram.
Wire resistance: max. 1.5 ohms
| Component | Connector | Test box |
|---|---|---|
| Bank 1 sensor 1 | Terminal 1 | Socket 70 |
| Terminal 2 | Socket 71 | |
| Terminal 5 | Socket 51 | |
| Terminal 6 | Socket 52 | |
| Bank 2 sensor 1 | Terminal 1 | Socket 13 |
| Terminal 2 | Socket 14 | |
| Terminal 5 | Socket 12 | |
| Terminal 6 | Socket 15 |
- Also check wires for short circuit to B+ and Ground (GND).
Specified value: infinity ohms
If no malfunctions are found in wires
- Replace respective oxygen sensor
- Bank 1 Heated Oxygen Sensor (HO2S) -G39-. Refer to «Exhaust manifold/ catalytic converter module with front exhaust pipe and attachments»(ref-255339-S19797556052007053000000) , item 3
- Bank 2 Heated Oxygen Sensor (HO2S) 2 -G108-. Refer to «Exhaust manifold/ catalytic converter module with front exhaust pipe and attachments»(ref-255339-S19797556052007053000000) , item 9
- Erase DTC memory of Engine Control Module (ECM). Refer to «Diagnostic mode 4: Reset/erase diagnostic data»(ref-255339-S26400046962007053000000)
- Generate readiness code. Refer to «Readiness code, generating»(ref-255339-S37690993602007053000000)