Checking the signal cable
- Ignition off
- Disconnect the connector from the central electronic module (CEM)
- Disconnect the 6-pin connector from the stepper motor.
Check the signal cables between:
- central electronic module (CEM) terminal #6A and stepper motor terminal #2
- central electronic module (CEM) terminal #7A and stepper motor terminal #3
- central electronic module (CEM) terminal #11A and stepper motor terminal #4
- central electronic module (CEM) terminal #12A and stepper motor terminal #5.
check for a short-circuit to supply voltage according to Short-circuit to supply voltage, permanent faults . Check for a short-circuit to ground according to Short-circuit to ground, permanent faults . Check for an open-circuit according to Open-circuit, permanent faults .
If there is an open-circuit, also check connector 54/3 for contact resistance and oxidation according to Contact resistance and oxidation .
Check the ground lead between:
- 6-pin connector on the cable harness terminal #6 and ground.
check for a short-circuit to supply voltage according to Short-circuit to supply voltage, permanent faults . Check for an open-circuit according to Open-circuit, permanent faults .
Remedy as necessary.
Other information:
- See appropriate Wiring diagram
- To access or replace the central electronic module (CEM) connector, see Central electronic module (CEM), replacing
- To access and replace the stepper motor, see Stepper motor, steering gear, replacing
- To connect the breakout box, see Connecting the breakout box
- For information about signals, see Signal specification .
Is the signal cable OK?
- YES
Refer to Checking the component
- NO
Refer to Verification