B1E9C-13

B1E9C-13-REAR RIGHT HEATER CONTROL CIRCUIT - CIRCUIT OPEN





For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With the engine running.

- Set Condition:
The Heated Seat Module (HSM) detects current below 0.5 of an amp on the (P178) Right Rear Seat Heater Control circuit for more than two seconds with the output turned on.





1. TEST FOR INTERMITTENT CONDITION

NOTE: Make sure the battery is fully charged and the charging system is operating properly before proceeding.

1. Turn the ignition on.
2. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs).
3. Turn the ignition off.
4. Start the engine and let it run.
5. Turn the Heated Seat on and operate in all modes.
6. Using a scan tool, read DTCs.

Is the DTC active?

Yes

- Go To 2

No

- The conditions that caused this code to set are not present at this time. Verify seat harness is routed correctly. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals. Attempt to reproduce condition by adjusting the front seat.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK FOR OPEN RIGHT REAR SEAT CUSHION HEATER ELEMENT




1. Turn the ignition off.
2. Disconnect the Right Rear Seat Cushion Heater harness connector.

NOTE: Check connectors. Clean and repair as necessary.

3. Measure the resistance between the (P178) Right Rear Seat Heater Control circuit and the (Z909) Ground circuit at the Right Rear Seat Cushion Heater Connector (seat side).

Is the resistance above 4.8 Ohms?

Yes

- Replace the Rear Seat Cushion Heater Element.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. CHECK (P178) RIGHT REAR SEAT HEATER CONTROL CIRCUIT FOR AN OPEN IN BODY HARNESS




1. Disconnect the HSM C3 harness connector.

NOTE: Check connectors. Clean and repair as necessary.

2. Measure the resistance of the (P178) Right Rear Seat Heater Control circuit between the HSM C3 harness connector and the Right Rear Seat Cushion Heater harness connector (harness side).

Is the resistance below 5.0 Ohms?

Yes

- Go To 4

No

- Repair the (P178) Right Rear Seat Heater Control circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. CHECK (Z909) GROUND CIRCUIT FOR AN OPEN




1. Measure the resistance of the (Z909) Ground circuit between ground and the Right Rear Seat Cushion Heater harness connector (harness side).

Is the resistance below 5.0 Ohms?

Yes

- Replace the Heated Seat Module (HSM).
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the (Z909) Ground circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.