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) Left Seat Heater B(+) Driver circuit is open.





1. VERIFY DIAGNOSTIC TROUBLE CODE (DTC) B1094-FRONT LEFT SEAT HEATER CONTROL CIRCUIT OPEN IS ACTIVE
1. Turn the ignition on.
2. Using a scan tool, record and erase DTCs.
3. Operate the Heated Seat Switch in both positions several times.
4. Using a 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 PIGTAIL HARNESS AND SEAT HEATER ELEMENTS




1. Turn the ignition off.
2. Disconnect the C313 in-line harness connector.

NOTE: Check connectors. Clean and repair as necessary.

3. Measure the total resistance of the harness and Cushion and Seat Back Heater Elements between the (P187) Left Seat Heater B(+) Driver circuit and the (Z912) Ground circuit at the C313 in-line harness connector (seat side).

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

Yes

- Go To 3

No

- Go To 5

3. CHECK (Z912) GROUND CIRCUIT FOR AN OPEN




1. Measure the resistance of the (Z912) Ground circuit between ground and the C313 in-line harness connector (harness side).

Is the resistance below 5.0 ohms?

Yes

- Go To 4

No

- Repair the (Z912) 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 C313 in-line harness connector (harness side) and the HSM connector.

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 FOR AN OPEN LEFT SEAT CUSHION HEATER ELEMENT




1. Disconnect the Left Seat Cushion Heater connector.

NOTE: Check connectors. Clean and repair as necessary.

2. Measure the resistance of the Seat Cushion Heater Element at the Left Seat Cushion Heater connector.

Is the resistance above 5.8 ohms?

Yes

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

No

- Repair or replace the pigtail harness for an open or replace the open Seat Back Heater Element.
- Perform BODY VERIFICATION TEST Body Verification Test.