B10B8-CABIN HEATER 2 CONTROL CIRCUIT LOW (TIPM)
For a complete wiring diagram Refer to Section 8W
- 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.
| Possible Causes |
| (K232) CABIN HEATER RELAY 2 CONTROL CIRCUIT SHORTED TO GROUND |
| CABIN HEATER 2 RELAY |
| TOTALLY INTEGRATED POWER MODULE (TIPM) |
Diagnostic Test
1. VERIFY THAT THE DTC IS ACTIVETurn the ignition on.
With the scan tool, erase DTCs.
With the scan tool, actuate the Cabin Heater 2 Relay.
Monitor the scan tool, for at least two minutes.
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 – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
2. CHECK (K232) CABIN HEATER RELAY 2 OUTPUT CIRCUIT FOR SHORT TO GROUND
Turn the ignition off.
Disconnect the TIPM C1 harness connector.
Remove the Cabin Heater Relay 2.
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 – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
3. TOTALLY INTEGRATED POWER MODULE (TIPM)
Turn the ignition on.
With the scan tool, erase DTCs.
With the scan tool, actuate the Cabin Heater 2 Relay.
Monitor the scan tool for at least two minutes.
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) in accordance with the service information.
- Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Replace the Cabin Heater Relay 2 in accordance with the service information.
- Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).