Test sequence
- Disconnect 2-pin harness connector for needle lift sensor (arrow).
- Measure resistance between sensor terminals.
Specified value: 80 to 120 Ω
If specified value is not obtained:
- Replace cylinder 3 injector with Needle Lift Sensor -G80-. Refer to item 7 in Component Locations, overview (vehicles with engine code ALH) , overview of component locations.
- Erase DTC memory of control module for Diesel-Direct fuel injection system. Refer to Diagnostic mode 4: Reset/erase diagnostic data .
- Generate readiness code
If specified value is obtained:
- Connect test box to control module wiring harness. Refer to Test box, connecting for wiring test .
Vehicles with 80-pin control module
- Check for open circuits in wires between test box and connector according to wiring diagram.
Terminal 1 + socket 62
Terminal 2 + socket 55
Wire resistance: max. 1.5 Ω
Vehicles with 121-pin control module
- Check for open circuits in wires between test box and connector according to wiring diagram.
Terminal 1 + socket 109
Terminal 2 + socket 101
Wire resistance: max. 1.5 Ω
Continue for all vehicles
- Check wires for short circuit to each other, to vehicle Ground (GND) and to B+.
Specified value: ∞ Ω
If no malfunctions are found in wires:
- Replace Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) -J248-. Refer to Control module for Diesel-Direct Fuel Injection System, replacing .
- Generate readiness code.