DDM-26

DDM-26-DRIVER HEATED SEAT/SWITCH OPEN





For a complete wiring diagram Consult Diagrams/Electrical

- When Monitored:
Continuously.

- Set Condition:
If the switch MUX circuit is over 4.9 volts for over 10 second, this code will set.





Diagnostic Test

1. DTC PRESENT
Turn the ignition on.
With the scan tool, erase DTCs.
Cycle the ignition switch from Off to Run.
Operate the switch in all positions several times.
With the scan tool, read DTCs.
Does the scan tool display the same DTC?

Yes

- Go To2

No

- The condition that caused this code to set is not present at this time. Review wiring schematics and inspect related wiring for an intermittent condition.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.

2. DRIVER SEAT SWITCH MUX CIRCUIT VOLTAGE
Turn the ignition on.
With the scan tool in Sensors, read the Driver Heated Seat Switch voltage.
Select the voltage displayed.

4.4 to 5.1 volts.

- Go To3

Over 5.2 volts

- Go To5

3. (P7) DRIVER HEATED SEAT SWITCH MUX WIRE OPEN




Disconnect the Driver Seat Switch connector.
Turn the ignition on.
Measure the voltage of the (P7) Driver Heated Seat Switch MUX circuit and ground.
Is the voltage between 4.4 and 5.1 volts?

Yes

- Go To4

No

- Repair the (P7) Driver Heated Seat Switch MUX wire for an open.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.

4. (P989) SEAT SWITCH MUX RETURN




Turn the ignition off.
Measure the resistance of the (P989) Seat Switch MUX Return circuit in the switch connector to ground.
Is the resistance below 5.0 ohms?

Yes

- Replace the Driver Seat Switch.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Repair the (P989) Seat Switch MUX Return for an open.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.

5. (P7) DRIVER SEAT SWITCH MUX WIRE SHORT TO VOLTAGE




Disconnect the Driver Door Module C2 connector.
Inspect the (P7) Driver Heated Seat Switch MUX circuit for a possible short to another circuit.
Were there any problems found?

Yes

- Repair the (P7) Driver Heated Seat MUX circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Replace the Driver Door Module.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.