B1094

B1094-FRONT LEFT SEAT HEATER CONTROL CIRCUIT OPEN - LHD





For a complete wiring diagram REFER to DIAGRAMS/ELECTRICAL .


- When Monitored:
During heated seat operation.

- Set Condition:
The Heated Seat Module (HSM) detects an open or high voltage condition.






Diagnostic Test


1. TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, clear all DTC's.
Operate the Heated Seat Switch in both positions several times.

NOTE: Check connectors - Clean and repair as necessary.

With the scan tool, read DTCs.
Does the scan tool display active: B1094-FRONT LEFT SEAT HEATER CONTROL CIRCUIT OPEN?

Yes


- Go To 2


No


- The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test


2. (P187) LEFT SEAT HEATER B(+) DRIVER CIRCUIT SHORTED TO VOLTAGE
Disconnect the Heated Seat Module harness connector.
Turn the ignition on.
Measure the voltage on the (P187) Left Seat Heater B(+) Driver circuit.
Is there voltage above 0.5 volts?

Yes


- Repair the (P187) Left Seat Heater B(+) Driver circuit for a short to voltage.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test


No


- Go To 3


3. (P187) LEFT SEAT HEATER B(+) DRIVER CIRCUIT OPEN
Turn the ignition off.
Measure the resistance of the (P187) Left Seat Heater B(+) Driver circuit at the Heated Seat Module harness connector to chassis ground.
Is the resistance between 2 and 5 ohms?

Yes


- Replace the Heated Seat Module.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test


No


- Go To 4



4. (Z908) SEAT HEATER GROUND CIRCUIT OPEN
Using a 12-volt test light connected to 12-volts, check the (Z908) Seat Heater Ground circuit at the Heated Seat Module harness connector.
Does the test light illuminate brightly?

Yes


- Check the heater wiring in the driver seat harness for an open, if OK replace the open seat heater element(s).
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test


No


- Repair the open or excessive resistance in the (Z908) Seat Heater ground circuit.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test