Rear Booster Fan Relay Open (ATC)

REAR BOOSTER FAN RELAY OPEN (ATC)

For a complete wiring diagram Consult Diagrams/Electrical

- When Monitored:
With the ignition off.

- Set Condition:
If the Integrated Power Module (IPM) detects an open on the Rear Booster Fan Relay Control circuit. This condition must be present for a least one second.





Diagnostic Test

1. CHECK (A1) B(+) CIRCUIT FOR AN OPEN TO REAR BOOSTER FAN RELAY
Turn the ignition off.
Remove the Rear Booster Fan Relay from the IPM.
Using a 12-volt test light connected to ground, probe cavity 85 of the blower relay connector.
Does the test light illuminate?

Yes

- Go To 2

No

- Check the (A1) B(+) circuit to the IPM for an open. If open, repair as necessary. Otherwise, replace the IPM.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.

2. CHECK IF DTC RESETS WITH SUBSTITUTE RELAY INSTALLED
Install a substitute relay in place of the existing Rear Booster Fan Relay.
Turn the ignition on.
With the scan tool, erase IPM DTCs.
Cycle the ignition from on to off.
Turn the ignition on.
With the scan tool, read IPM DTCs.
Does the scan tool display this DTC as active?

Yes

- Replace the IPM.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Replace the original Rear Booster Fan Relay.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.