B1092-FRONT LEFT SEAT HEATER CONTROL CIRCUIT LOW
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
Ignition on, during the heated seat operation.
- Set Condition:
This code is set immediately after the Heated Seat Module detects the control circuit shorted to ground.
| Possible Causes |
| (P187) LEFT SEAT HEATER B(+) DRIVER SHORTED TO GROUND |
| SEAT HEATER ELEMENT PIGTAIL HARNESS SHORTED |
| SEAT CUSHION HEATER ELEMENT SHORTED |
| SEAT BACK HEATER ELEMENT SHORTED |
| HEATED SEAT MODULE |
Diagnostic Test
1. VERIFY THAT DTC B1092-FRONT LEFT SEAT HEATER CONTROL CIRCUIT LOW IS ACTIVEWith the scan tool, record and erase DTC's
Operate the Heated Seat Switch in both positions several times.
With the scan tool, read DTC's.
Does the DTC B1092 FRONT LEFT SEAT HEATER CONTROL CIRCUIT LOW reset?
Yes
- Go To 2
No
- The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
2. DISCONNECT LEFT SEAT INLINE CONNECTOR AND READ DTC'S
Disconnect the left seat inline connector.
NOTE: Check connectors - Clean and repair as necessary.
With the scan tool, erase HSM DTC's
Operate the Heated Seat Switch in both positions several times.
With the scan tool, read DTC's.
Does the scan tool display the same DTC?
Yes
- Go To 6
No
- Go To 3
3. CHECK THE (P187) LEFT SEAT HEATER B(+) DRIVER FOR A SHORT TO GROUND
Measure between the (P187) Left Seat Heater B(+) Driver circuit at the seat inline connector (seat side) and the seat frame for a short to ground.
Is the resistance below 1k ohms?
Yes
- Repair/replace the pigtail/heating element as necessary for a short to ground condition.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Go To 4
4. CHECK THE LEFT CUSHION PAD HEATER RESISTANCE
Disconnect the Left Cushion Pad Heater 2 – way connector.
Check the resistance of the cushion heater element by measuring between the Left Seat Heater B(+) Driver and the Ground circuit at the left cushion pad connector (component side).
Was the resistance below 3.5 ohms?
Yes
- Replace the heater element as necessary.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Go To 5
5. CHECK THE LEFT SEAT BACK HEATER RESISTANCE
Disconnect the Left Seat Back Heater 2 – way connector.
NOTE: Check connectors - Clean and repair as necessary.
Check the resistance of the seat back heater element by measuring between the Left Seat Heater B(+) Driver and the Ground circuit at the left seat back connector (component side).
Is the resistance below 4.0 ohms?
Yes
- Replace the seat back heater element as necessary.
- Perform BODY VERIFICATION TEST – VER 1
No
- Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent short to ground.
- Perform BODY VERIFICATION TEST – VER 1 (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
6. Check the Left Seat Heater B(+) Driver circuit for a short to ground
Disconnect the Heated Seat Module connector.
NOTE: Check connectors - Clean and repair as necessary.
Measure the (P187) Left Seat Heater B(+) Driver circuit to ground at the HSM connector. Cavity 3 for LHD and 4 for RHD
Is the resistance below 5.0 ohms?
Yes
- Repair the Left Seat Heater B(+) Driver circuit for a short to ground.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Replace the Heated Seat Module.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)