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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 326 (Seat Heating System And Seat Cooling System) >> Diagnostic Information and Procedures >> DTC B2345 (Rear Seat) >> Circuit/System Testing

Circuit/System Testing

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B2345 00

  1. Ignition OFF, disconnect the X1 harness connector at the RHSM.
  2. Test for infinite resistance between the control circuit terminal 3 and ground.
    • If not the specified value, test the control circuits listed below for a short to ground:
    • Left rear seat heater element terminal 3
    • Left rear seat heater element terminal 5
  3. Test for infinite resistance between the control circuit terminal 6 and ground.
    • If not the specified value, test the control circuits listed below for a short to ground:
    • Right rear seat heater element terminal 6
    • Right rear seat heater element terminal 2
  4. Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal 3 and ground.
    • If the test lamp illuminates, test the control circuits listed below for a short to voltage:
    • Left rear seat heater element terminal 3
    • Left rear seat heater element terminal 5
  5. Verify that a test lamp does not illuminate between the supply voltage circuit terminal 6 and ground.
    • If the test lamp illuminates, test the control circuits listed below for a short to voltage:
    • Right rear seat heater element terminal 6
    • Right rear seat heater element terminal 2
  6. If all circuits test normal, replace the RHSM.

B2345 13

  1. Ignition OFF, disconnect the X2, X4 harness connectors at the RHSM.
  2. Test for greater than 850 ohms between the signal and the low reference circuits listed below:
    • Left rear seat terminal 9 X4 and terminal 6 X2
    • Right rear seat terminal 20 X4 and terminal 8 X2
    • If less than the specified value, test for a short between the signal and low reference circuits. If the circuits test normal, replace the appropriate seat cushion heater element/temperature sensor.
  3. If all circuits test normal, replace the RHSM.

B2345 42 or B2345 4B 

If either DTC is set, replace the RHSM.

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