Malibu L4-2.4L (2010)
Ignition ON, operate the heated seat switch to the high and low heat positions. The seat cushion and seat back should get warm and the appropriate
heated seat switch temperature indicators should illuminate.
If the heated seat is inoperative, refer to the Heated Seat Circuit Test.
If the heated seat switch indicator does not illuminate or is always illuminated, refer to the Heated Seat Switch Circuit Test.
Circuit/System Testing
Heated Seat Circuit Test
1. Ignition OFF, disconnect the harness connector at the appropriate heated seat switch.
2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 5 and ground.
‹› If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
3. Ignition OFF, connect the harness connector at the heated seat switch and disconnect the X1 harness connector at the appropriate heated seat
module.
4. Test for less than 5 Ohms between the ground circuit terminal 1 and ground.
‹› If greater than the specified range, test the ground circuit for an open/high resistance.
5. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 4 and ground.
‹› If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
6. Verify that a test lamp illuminates between the ignition circuit terminal 3 and ground.
‹› If the test lamp does not illuminate, test the ignition circuit for an open/high resistance.
7. Connect a test lamp between the signal circuit terminal 2 and ground.
8. Press and release the heated seat switch. The test lamp should turn ON and OFF when the switch is pressed and released.
‹› If the test lamp remains OFF, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace
the heated seat switch.
‹› If the test lamp is always ON, test the signal circuit for an short to voltage. If the circuit tests normal, test or replace the heated seat switch.
9. Ignition OFF, disconnect the X3 harness connector at the heated seat module.
10. Test for infinite resistance between the signal, control, and low reference circuit terminals listed below and ground:
*
Seat cushion heater element voltage control terminal 1
*
Seat cushion heater element ground control terminal 4
*
Seat cushion temperature sensor signal terminal 3
*
Seat cushion temperature sensor low reference terminal 2
‹› If not the specified value, test the appropriate circuit for a short to ground.
11. Test for 2 k-15 kOhms between the signal circuit terminal 3 and the low reference circuit terminal 2.
‹› If not within the specified range, test or replace the seat cushion heater element.
12. Test for 0.5-5 Ohms between control circuit terminal 1 and control circuit terminal 4.
‹› If not within the specified range, test or replace the seat cushion heater element.
13. Disconnect the X2 harness connector at the heated seat module.
14. Test for infinite resistance between the control circuit terminals listed below and ground:
*
Seat back heater element ground control terminal 1
*
Seat back heater element voltage control terminal 2
‹› If not the specified value, test the appropriate circuit for a short to ground.
15. Test for 0.5-5 Ohms between control circuit terminal 1 and control circuit terminal 2.
‹› If not within the specified range, test or replace the seat back heater element.