B1094

B1094-FRONT LEFT SEAT HEATER CONTROL CIRCUIT OPEN





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

- 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) Left 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 Diagnostic Trouble Codes (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 BODY VERIFICATION TEST. Body Verification Test.

2. CHECK FOR OPEN SEAT HEATER ELEMENTS




1. Turn the ignition off.
2. Disconnect the Left Seat Cushion Heater connector.

NOTE: Check connectors. Clean and repair as necessary.

3. Measure the total resistance of the Cushion and Seat Back Heater Elements between the (P187) Left Seat Heater B(+) Driver circuit and the (Z960) Ground circuit at the Left Seat Cushion Heater connector (component side).

Is the total resistance 2.5 to 3.5 ohms + or - 0.5 ohms?

Yes

- Go To 3

No

- Go To 5

3. CHECK (Z960) GROUND CIRCUIT FOR AN OPEN




1. Using a 12-volt test light connected to 12-volts, check the (Z960) Ground circuit at the Left Seat Cushion Heater connector (harness side).

NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Does the test light illuminate brightly?

Yes

- Go To 4

No

- Repair the (Z960) Ground circuit for an open.
- Perform BODY VERIFICATION TEST. Body Verification Test.

4. CHECK (P187) LEFT 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) Left Seat Heater B(+) Driver circuit between the HSM connector and the Left Seat Cushion Heater connector (harness side).

Is the resistance below 5.0 Ohms?

Yes

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

No

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

5. CHECK LEFT SEAT BACK HEATER ELEMENT FOR AN OPEN




1. Disconnect the Left Seat Back Heater connector.

NOTE: Check connectors. Clean and repair as necessary.

2. Measure the resistance of the Left Seat Back Heater Element between the (P187) Left Seat Heater B(+) Driver and the (Z960) Ground circuit at the Left Seat Back Heater connector (component side).

Is the resistance above 6.0 Ohms?

Yes

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

No

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