B10B3

B10B3 - CABIN HEATER 1 CONTROL CIRCUIT





For a complete wiring diagram refer to the Wiring Information. Electrical Diagrams

- When Monitored:
With the ignition on.

- Set Condition:
A Cabin Heater (PTC) #1 error message has been received over the CAN bus from the TIPM.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.Pre-Diagnostic Troubleshooting Procedure

1. DTC IS ACTIVE

NOTE: This DTC will set if the Engine Control Module (ECM) receives a message from the TIPM indicating that a PTC Heater Relay DTC is present.

1. Ignition on, engine not running.
2. With the scan tool, Clear DTCs in the Engine Control Module (ECM).
3. With the scan tool, actuate the PTC Heater Relay 1.
4. With the scan tool, select View DTCs.

Is the status Active for this DTC?

Yes

- Go To 2

No

- Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure.Checking for an Intermittent DTC

2. ENGINE CONTROL MODULE (ECM)
1. With the scan tool, select View DTCs in the TIPM.

Is there a stored or active PTC Heater Relay DTC present in the TIPM?

Yes

- Diagnose and repair the DTC(s). Testing and Inspection

No

- Replace the Engine Control Module (ECM).
- Perform the ECM Verification Test..