B10B8

B10B8-CABIN HEATER 2 CONTROL CIRCUIT LOW





For a complete wiring diagram, refer to the Wiring Information

- When Monitored:
With the ignition on, the Cabin Heater Relay 2 commanded on.

- Set Condition:
If the Totally Integrated Power Module detects the (K232) Cabin Heater Relay 2 Control circuit is shorted to ground.





1. VERIFY THAT THE DTC IS ACTIVE
1. Turn the ignition on.
2. With the scan tool, erase DTCs.
3. With the scan tool, actuate the Cabin Heater 2 Relay.
4. Monitor the scan tool, for at least two minutes.
5. With the scan tool, read DTCs.

Does the scan tool, display active: B10B8-CABIN HEATER 2 CONTROL CIRCUIT LOW?

Yes

- Go To 2

No

- The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK (K232) CABIN HEATER RELAY 2 OUTPUT CIRCUIT FOR SHORT TO GROUND




1. Turn the ignition off.
2. Disconnect the TIPM C1 harness connector.
3. Remove the Cabin Heater Relay 2.
4. Using an ohm meter measure the resistance between the (K232) Cabin Heater Relay 2 Output circuit and ground.

Does the ohm meter read open circuit?

Yes

- Go To 3

No

- Repair the (K232) Cabin Heater Relay 2 Output circuit for a short to ground.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. TOTALLY INTEGRATED POWER MODULE (TIPM)




1. Turn the ignition on.
2. With the scan tool, erase DTCs.
3. With the scan tool, actuate the Cabin Heater 2 Relay.
4. Monitor the scan tool for at least two minutes.
5. With the scan tool, read DTCs.

Does the scan tool display active: B10B8-CABIN HEATER 2 CONTROL CIRCUIT LOW?

Yes

- Replace the Totally Integrated Power Module (TIPM).
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Cabin Heater Relay 2.
- Perform the BODY VERIFICATION TEST. Body Verification Test.