Blower Not On High

BLOWER NOT ON HIGH





WHEN MONITORED
When executing the Cooldown Test

SET CONDITION
This message will display if the blower is not operating at high speed while the Cooldown Test is running.

POSSIBLE CAUSES
- Faults present in the HVAC system
- Blower did not remain on high speed for the entire test
- Blower motor/related circuits

Diagnostic Test

1. CHECK FOR DTCS IN THE A/C HEATER CONTROL
Turn the ignition on.
With the DRBIII(R), read HVAC DTCs.

Q: Does the DRBIII(R) display any DTCs?

YES: Diagnose and repair the DTC(s). When the repair is complete, erase the DTCs, cycle the ignition switch, start the engine, set the blower control to high speed, and then re-run the Cooldown Test. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 2

2. CHECK THE BLOWER SPEED SETTING

Q: Was the blower control set to high speed for the entire Cooldown Test?

YES: Check the blower motor and related circuits for the cause of blower operation problems and repair as necessary. When the repair is complete, cycle the ignition switch, set the blower control to high speed, and then re-run the Cooldown Test. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Start the engine, set the blower control to high speed, and then re-run the Cooldown Test. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test