Circuit/System Testing: Notes

B2345 00

1. Ignition OFF, disconnect the X1 harness connector at the rear heated seat module.
2. Test for infinite resistance between the left seat heating element supply voltage circuit terminal 3 and ground.
   • If less than infinite, test the supply voltage circuit and the seat cushion element control circuit for a short to ground.
3. Ignition ON, verify that a test lamp does not illuminate between the supply voltage circuit terminal 3 and ground.
   • If the test lamp illuminates, test the supply voltage circuit and the seat cushion element control circuit for a short to voltage.
4. Test for infinite resistance between the right seat heating element supply voltage circuit terminal 6 and ground.
   • If less than infinite, test the supply voltage circuit and the seat cushion element control circuit for a short to ground.
5. Ignition ON, verify that a test lamp does not illuminate between the supply voltage circuit terminal 6 and ground.
   • If the test lamp illuminates, test the supply voltage circuit and the seat cushion element control circuit for a short to voltage.
6. If all circuits test normal, replace the rear heated seat module.

B2345 13

1. Disconnect the rear heated seat module connectors X2 and X4.
2. Verify the resistance through the faulted seat heat sensor is 850-300K ohms from the signal circuit terminal to the low reference circuit terminal in the harness connectors.
   • If less than 850 ohms, replace the seat heater element.
3. If the circuits test normal replace the rear heated seat module.