No Response from Heated Seat Module

No Response from Heated Seat Module






For a complete wiring diagram, refer to.






Test Step 1 - TEST FOR INTERMITTENT CONDITION

• Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.

• Turn the ignition on.

• Make sure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.

• With the scan tool, read the module status.

• Check the TIPM for any active CAN hardware DTCs, perform DTC before proceeding.

Does the scan tool indicate that the module is active on the bus?

Yes

• The no response condition is not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.

No

• Go to Test Step 2

Test Step 2 - CHECK THE (P693) FUSED RUN RELAY OUTPUT CIRCUIT FOR AN OPEN OR SHORT







• Turn the ignition off.

• Disconnect the Heated Seat Module C1 harness connector.

• Turn the ignition on.

• Using a 12-volt test light connected to ground, check the (P693) Fused Run Relay Output circuit.

Does the test light illuminate brightly?

Yes

• Go to Test Step 3

No

• Repair the open or short in the (P693) Fused Run Relay Output circuit.

• Perform the Body Verification Test. Refer to => [ Body Verification Test ] Body Interior.

Test Step 3 - CHECK THE (Z908) GROUND CIRCUIT FOR AN OPEN







• Turn the ignition off.

• Using a 12-volt test light connected to 12-volts, check the (Z908) Ground circuit.

Does the test light illuminate brightly?

Yes

• Go to Test Step 4

No

• Repair the open in the (Z908) Ground circuit.

• Perform the Body Verification Test. Refer to => [ Body Verification Test ] Body Interior.

Test Step 4 - CHECK THE (D265) AND (D264) CAN INTERIOR BUS (125K) CIRCUITS FOR AN OPEN







• Disconnect the TIPM C7 harness connector.

• Measure the resistance of the (D264) CAN Interior Bus (125K) (-) circuit between the TIPM C7 harness connector and the Heated Seat Module C1 harness connector.

• Measure the resistance of the (D265) CAN Interior Bus (125K) (+) circuit between the TIPM C7 harness connector and the Heated Seat Module C1 harness connector.

Are the resistances below 5.0 Ohms?

Yes

• Replace the Heated Seat Module in accordance with the Service Information.

• Perform the Body Verification Test. Refer to => [ Body Verification Test ] Body Interior.

No

• Repair the open in the (D265) or (D264) CAN Interior Bus (125K) circuit.

• Perform the Body Verification Test. Refer to => [ Body Verification Test ] Body Interior.