Checking Power Supply and Ground. Intermittent Fault

Checking power supply and ground. Intermittent fault

Checking the power supply and ground for the control module
Check climate control module (CCM) terminal #A1 and relay 2/29 (passenger compartment relay box) connectors. Check for contact resistance and oxidation.
Check fuses 23 and 24 in the passenger compartment fusebox for the climate control module (CCM). Check for contact resistance and oxidation.
Check the power supply cable between fuse 23 and the 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 (extended X supply) between fuse 24 and relay 2/29 terminal #3. Check for an intermittent open-circuit.
Check the cable for power supply (extended X supply) between relay 2/29 terminal #1 and climate control module (CCM) terminal #A1. Check for an intermittent open-circuit.
Check power supply cable between fuse 23 and the climate control module (CCM) terminal #A8. Check for an intermittent open-circuit.
Check the ground lead between control module terminal # A16 and ground terminal 31/84. Check for an intermittent 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 Climate control module (CCM), replacing Climate Control Module (CCM), Replacing
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Climate Control Module (CCM)
- For other values, see Signal description, climate control module (CCM), Connector A Signal Description, Climate Control Module (CCM), Connector A
- Checking wiring and terminals Checking Wiring And Terminals













Was a fault detected?

Yes - FAULT FOUND

No - No Fault Found

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