Intermittent Fault

Intermittent fault











Check ECC control module connector for contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals

If diagnostic trouble codes (DTC)s ECC-211, ECC-222, ECC-231 and ECC-235 are stored:

Check the common power supply cable between ECC control module #A7 and damper motor terminal 2 for an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals

If, in addition, diagnostic trouble code (DTC) ECC-122 is stored:

Check the common ground lead between ECC control module #A22 and damper motor terminal 1 and outside temperature sensor terminal 4 for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals

Remedy as necessary.

Other information

- To disconnect the control module, see Replacing ECC control module Service and Repair
- To access the passenger side temperature damper motor, see Replacing damper motors
- To access the driver's side temperature damper motor, see Replacing damper motors
- To access the air distribution damper motor, see Replacing damper motors
- To access the recirculation damper motor, see Replacing damper motors
- To access the outside temperature sensor, see Replacing outside temperature sensor (ECC) Service and Repair
- To connect the breakout box, see Connection of breakout box ECC Connection of Breakout Box ECC
- The power supply to the damper motors should be approximately 5 V. For other values, see Signal specification ECC Signal Specification ECC


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