System Self-Test

Associated Faults
Other conditions which may exist but will NOT log fault codes:

Condition(s):

No heat
Possible Source(s):
- Airlock in system.

Action(s) to take:
- Refer section Cooling System for fill/bleed procedure.

Possible Source(s):
- Heater water pump inoperative
- Coolant flow valve stuck closed

Action(s) to take:
- Check operation & circuit

Possible Source(s):
- Faulty engine coolant thermostat

Action(s) to take:
- Renew as required

One vent falling to open/close
Possible Source(s):
- Broken linkage.

Action(s) to take:
- Renew as required

Poor airflow
Possible Source(s):
- Blower motors - incorrect operation

Action(s) to take:
- Check operation & circuit