B1094

B1094-FRONT LEFT SEAT HEATER CONTROL CIRCUIT OPEN





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

- When Monitored:
Ignition on, during the heated seat operation.

- Set Condition:
This code sets immediately when the Heated Seat Module (HSM) detects that the (P187) Driver Seat Heater B(+) Driver circuit is open.





1. VERIFY DTC B1094-FRONT LEFT SEAT HEATER CONTROL CIRCUIT OPEN IS ACTIVE
1. Turn the ignition on.
2. With the scan tool, record and erase DTCs.
3. Operate the Heated Seat Switch in both positions several times.
4. With the scan tool, read DTCs.

Is DTC B1094-FRONT LEFT SEAT HEATER CONTROL CIRCUIT OPEN 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 seat.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK FOR OPEN SEAT HEATER ELEMENTS




1. Turn the ignition off.
2. Disconnect the Driver Cushion Pad Heater connector.

NOTE: Check connectors. Clean and repair as necessary.

3. Measure the total resistance of the Cushion Pad and Seat Back Heater Elements between the (P187) Driver Seat Heater B(+) Driver circuit and the (Z971) Ground circuit at the Driver Cushion Pad Heater connector (seat side).

Is the total resistance 3.5 Ohms to 0.5 Ohms?

Yes

- Go To 3

No

- Go To 5

3. CHECK (Z971) GROUND CIRCUIT FOR AN OPEN




1. Measure the resistance of the (Z971) Ground circuit between ground and the Driver Cushion Pad Heater connector (harness side).

Is the resistance below 5.0 Ohms?

Yes

- Go To 4

No

- Repair the (Z971) Ground circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. CHECK (P187) DRIVER SEAT HEATER B(+) DRIVER CIRCUIT FOR AN OPEN IN BODY HARNESS




1. Disconnect the HSM connector.

NOTE: Check connectors. Clean and repair as necessary.

2. Measure the resistance of the (P187) Driver Seat Heater B(+) Driver circuit between the Driver Cushion Pad Heater connector (harness side) and the HSM connector.

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 (P187) Driver Seat Heater B(+) Driver circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

5. CHECK FOR AN OPEN DRIVER SEAT BACK HEATER ELEMENT




1. Disconnect the Driver Seat Back Heater connector.

NOTE: Check connectors. Clean and repair as necessary.

2. Measure the resistance of the Driver Seat Back Heater Element between the (P187) Driver Seat Heater B(+) Driver circuit and the (Z971) Ground circuit at the Driver Seat Back Heater connector.

Is the resistance above 10.0 Ohms?

Yes

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

No

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