| Condition | Possible Cause | Action |
|---|---|---|
|
Heating performance is poor
|
Wiring or grounding for additional heater assembly faulty
|
Repair as necessary.
|
|
Additional heater fuses blown
|
Replace additional heater fuses to check for short.
|
|
|
Additional heater relays faulty
|
Check additional heater relays.
|
|
|
Additional heater assembly faulty
|
Check additional heater assembly.
|
|
|
ECM faulty
|
Check ECM.
|