B1E9A-1E

B1E9A-1E-FRONT RIGHT HEATER CONTROL CIRCUIT - CIRCUIT RESISTANCE OUT OF RANGE







- When Monitored:
With the engine running.

- Set Condition:
The Heated Seat Module (HSM) detects impedance above threshold on the (P188) Right Front Seat Heater Control circuit for more than two seconds with the output turned on.





1. TEST FOR INTERMITTENT CONDITION

NOTE: Before proceeding, verify the battery is fully charged, the charging system is operating properly, no Battery or System Voltage Diagnostic Trouble Codes (DTCs) are set, and the HSM Power and Ground circuits are clean and tight.

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 to the HSM. 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 seat.
- Perform the BODY VERIFICATION TEST Body Verification Test.

2. CHECK (P188) RIGHT FRONT SEAT HEATER CONTROL CIRCUIT FOR HIGH RESISTANCE




1. Turn the ignition off.
2. Disconnect the HSM C2 connector.
3. Disconnect the Right Seat Cushion Heater connector.
4. Disconnect the C351 in-line harness connector.

NOTE: Check connectors. Clean and repair as necessary.

5. Measure the resistance of the (P188) Right Front Seat Heater Control circuit between the HSM C2 connector and the Right Seat Cushion Heater connector (harness side).
6. Measure the resistance of the (P188) Right Front Seat Heater Control circuit between the HSM C2 connector and the C351 in-line harness connector (harness side).

Is the resistance below 5.0 Ohms for both measurements?

Yes

- Go To 3

No

- Repair the (P188) Right Front Seat Heater Control circuit for high resistance.
- Perform the BODY VERIFICATION TEST Body Verification Test.

3. CHECK (Z909) GROUND CIRCUIT FOR HIGH RESISTANCE




1. Measure the resistance of the (Z909) Ground circuit between ground and the Right Seat Cushion Heater connector (harness side).
2. Measure the resistance of the (Z909) Ground circuit between ground and the C351 in-line harness connector (harness side).

Is the resistance below 5.0 Ohms for both measurements?

Yes

- Go To 4

No

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

4. CHECK RIGHT SEAT CUSHION HEATER ELEMENT RESISTANCE




1. Measure the resistance between the (P188) Right Front Seat Heater Control circuit and the (Z909) Ground circuit at the Right Seat Cushion Heater connector (component side).

Is the resistance above 4.8 Ohms (without vented seats) or 9.8 Ohms (with vented seats)?

Yes

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

No

- Go To 5

5. CHECK PIGTAIL HARNESS AND RIGHT SEAT BACK HEATER ELEMENT RESISTANCE




1. Measure the resistance between the (P188) Right Front Seat Heater Control circuit and the (Z909) Ground circuit at the C351 in-line harness connector (seat back side).

Is the resistance above 4.8 Ohms (without vented seats) or 11.6 Ohms (with vented seats)?

Yes

- Repair or replace the pigtail harness for high resistance or replace the Seat Back Heater Element.
- Perform the BODY VERIFICATION TEST Body Verification Test.

No

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