B11DC

B11DC-13-REAR HEATED SEATS POWER SUPPLY - 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 no voltage on the (F922) Fused Ignition Run Control Output circuit for more than two seconds.





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. 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 REAR PDC FUSE
1. Using a 12-volt test light connected to ground, check for power on both sides of Rear PDC Fuse 43.

Choose the applicable result?

No Power To Fuse

- Replace the Rear PDC. Description and Operation.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

Fuse Open

- Go To 3

Fuse Ok

- Go To 6

3. REPLACE AND RECHECK REAR PDC FUSE 43
1. Turn the ignition off.
2. Install a new Rear PDC Fuse.
3. Turn the ignition on.
4. Using a scan tool, erase DTCs.
5. Turn the ignition off.
6. Start the engine and let it run.
7. Operate each of the Heated Seats and the HSW, if equipped.
8. Inspect Rear PDC Fuse.

Is the fuse open?

Yes

- Go To 4

No

- Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Verify seat harness is routed correctly. 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.

4. CHECK (F922) FUSED IGNITION RUN CONTROL OUTPUT CIRCUIT INSIDE REAR PDC FOR SHORT TO GROUND
1. If not done previously, turn the ignition off.
2. Remove Rear PDC Fuse 43.

NOTE: Check connectors. Clean and repair as necessary.

3. Measure the resistance of the (F922) Fused Ignition Run Control Output circuit between ground and the Rear PDC Fuse 43 (output side) connector.

Is the resistance below 10K Ohms?

Yes

- Replace the Rear PDC and Fuse 43. Description and Operation.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 5

5. CHECK (F922) FUSED IGNITION RUN CONTROL OUTPUT CIRCUIT FOR A SHORT TO GROUND BETWEEN REAR PDC AND HSM
1. Disconnect the HSM C3 harness connector.
2. Disconnect the HSM C4 harness connector, if equipped.

NOTE: Check connectors. Clean and repair as necessary.

3. Measure the resistance of the (F922) Fused Ignition Run Control Output circuit between ground and the Rear PDC Fuse 43 (output side) connector.

Is the resistance below 10K Ohms?

Yes

- Repair the (F922) Fused Ignition Run Control Output circuit for a short to ground. Replace Fuse 43.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Heated Seat Module (HSM) and Fuse 43. Heated Seat Module - Removal
- Perform the BODY VERIFICATION TEST. Body Verification Test.

6. CHECK (F922) FUSED IGNITION RUN CONTROL OUTPUT CIRCUIT FOR AN OPEN
1. If not done previously, turn the ignition off.
2. Remove Rear PDC Fuse 43.
3. Disconnect the HSM C3 harness connector.

NOTE: Check connectors. Clean and repair as necessary.

4. Measure the resistance of the (F922) Fused Ignition Run Control Output circuit between the Rear PDC Fuse 43 (output side) connector and the HSM C3 harness connector.

Does the DTC return?

Yes

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

No

- Go To 7

7. CHECK (F922) FUSED IGNITION RUN CONTROL OUTPUT CIRCUIT FOR AN OPEN IN REAR PDC
1. Repair the (F922) Fused Ignition Run Control Output circuit for an open.
2. Perform the BODY VERIFICATION TEST. Body Verification Test.

Is the resistance below 5.0 Ohms?

Yes

- Replace the Rear PDC. Description and Operation.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time.