Checking The Power Supply And Ground For The Control Module
Check the keypad and carphone module (PHM) connector A. Check for contact resistance and oxidation.
Check fuse 11C/29 for the keypad and carphone module (PHM) in the passenger compartment fusebox.
If the fuse is blown, check the circuit after the fuse. Check for a short-circuit to ground before replacing the fuse. Then replace the fuse.
Check the cable for the power supply between fuse 11C/29 in the passenger compartment fusebox and the keypad and carphone module (PHM) terminal #A6. Check for an open-circuit.
Check the ground lead between keypad and carphone module (PHM) terminal #A18 and ground terminal 31/84. Check for an open-circuit. Check ground terminal 31/84. Check for contact resistance and oxidation.
Remedy as necessary.
Other information:
- To access or replace the keypad and carphone control module, see PHONE MODULE (PHM), REPLACING
- To connect the breakout box, see CONNECTING THE BREAKOUT BOX
- For information about signals and connectors, see SIGNAL SPECIFICATION
- see CHECKING WIRING AND TERMINALS
Was a fault detected?
- YES
Refer to VERIFICATION
- NO
Refer to CHECKING CONNECTORS