Checking the power supply and ground for the control module
Check climate control module terminal #A1 and relay 2/29 (passenger compartment relay box) connectors. Check for contact resistance and oxidation.
Check fuse 23 and 24 in the passenger compartment fusebox for the climate control module.
Check the cable for power supply between fuse 23 in the passenger compartment fusebox and control module terminal #A8. Check for an open-circuit.
Check the function of relay 2/29 by replacing it with a new relay.
Check the cable for power supply (delayed X supply) between fuse 24 and relay 2/29 terminal #3. Check for an open-circuit. The voltage at the relay terminal must be battery voltage, measured to ground.
Check the cable for power supply (delayed X supply) between relay 2/29 terminal #1 and climate control module (CCM) terminal #A1. Check for an open-circuit. The voltage at the terminal must be battery voltage, measured to ground.
Check power supply cable between fuse 23 and the climate control module (CCM) terminal #A8. Check for an open-circuit.
Check the ground lead between climate control module (CCM) terminal #A16 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 control module, see Dashboard environment panel (including climate control module (CCM)), replacing
- To connect the breakout box, see Connecting the breakout box
- For other values, see Signal description, climate control module (CCM), Connector A
- See Checking wiring and terminals .