Checking the Park / Neutral Position (PNP) Function in the Gear-Shift Position Sensor
Checking the park / neutral position (PNP) function in the gear-shift position sensor
Checking the park / neutral position (PNP) function in the gear-shift position sensor
Note! The test assumes that the battery is fault free, that the starter motor circuit has been checked and that no relevant diagnostic trouble codes (DTCs) for the symptom are stored.
Caution! Avoid touching the pins in the control module and the corresponding connector on the cable harness. There is a risk of static discharge which could damage the control module. Discharge yourself and tools to be used by holding the tool's metal part and touching a body part on the car just before starting to work.
- Ignition on.
- When gear position sensor is in position P or N , Central Electronic Module (CEM) receives signal that start is permitted via #D9.
- Move the gear selector to position P or N. Parking brake applied.
Check the voltage between central electronic module (CEM) terminals #D9 and #E1.
The voltage must be approximately 0 V.
Other information
- For connecting breakout box to Central Electronic Module (CEM): Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- Signal description Central Electronic Module (CEM): Signal specification Signal Specification
- See the wiring diagram for the cable routing.
Is the voltage OK?
Yes - Replacing the component
No - Checking wiring and terminals
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Replacing the component
Caution! Avoid touching the pins in the control module and the corresponding connector on the cable harness. There is a risk of static discharge which could damage the control module. Discharge yourself and tools to be used by holding the tool's metal part and touching a body part on the car just before starting to work.
If the voltage is approx. 0 V on #D9 in Central Electronic Module (CEM) then the gear selector circuit is working. Malfunction may be found in Central Electronic Module (CEM).
Try replacing the central electronic module (CEM).
Note! Before replacing the central electronic module (CEM) ensure that all other symptom tests have been carried out.
Other information:
- Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing
Continue - DONE
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Checking wiring and terminals
Caution! Avoid touching the pins in the control module and the corresponding connector on the cable harness. There is a risk of static discharge which could damage the control module. Discharge yourself and tools to be used by holding the tool's metal part and touching a body part on the car just before starting to work.
The cable harness is different depending on type of engine and transmission.
For vehicles with automatic transmission AW50-42, AW55-50/51SN, AW50/51AWD
Check the cable between central electronic module (CEM) terminal #D9 and automatic transmission 8/37. Check for an open circuit. Check for a short-circuit to ground. Check for a short-circuit to voltage.
For vehicles with automatic transmission 4T65EV, 4T65EV-GT, 4T65AWD
Check the cable between central electronic module (CEM) terminal #D9 and transmission control module (TCM) terminal #A44. Check for an open circuit. Check for a short-circuit to ground. Check for a short-circuit to voltage.
Remedy as necessary.
Other information
- For connecting breakout box to Central Electronic Module (CEM): Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- To connect the breakout box to the transmission control module (TCM), see Connecting the breakout box, B5254T2 Connecting the Test Box
- Signal description Central Electronic Module (CEM): Signal specification Signal Specification
- Signal description Transmission Control Module (TCM) AW55-50/51SN, AW50/51AWD: Signal description. Transmission control module (TCM), AW55-50/51SN, AW50/51 AWD
- Signal description Transmission Control Module (TCM) AW50-42:
- Signal description Transmission Control Module (TCM) 4T65EV, 4T65EV-GT, 4T65AWD:
- See the wiring diagram for the cable routing.
Was a fault detected?
Yes - Verification
No - No Fault Found
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off.
- Gear shift sensor in position D.
- Try to start the engine. It should not now be possible to start the engine.
- Ignition off.
- Gear-shift position sensor in position P or N.
- Try to start the engine. It should now be possible to start the engine.
Was the function OK?
Yes - Verification complete
No - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - Exit Fault-Tracing
No - Attempt New Test
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Attempt New Test - Checking the park / neutral position (PNP) function in the gear-shift position sensor
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