Intermittent Fault

Intermittent Fault







Check signal cable between ECC control module #A29 and damper motor terminal 3 for an intermittent short-circuit to ground according to Checking wiring and terminals - Intermittent faults.

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

Checking Wiring and Terminals

Other information:
- To connect the breakout box Connection of Breakout Box ECC
- The voltage on the signal cable varies between approximately 0-5 V depending on the damper motor position. The power supply to the damper motor should be approximately 5 V. For other values Connection of Breakout Box ECC