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Home >> Chevrolet >> 2010 >> Traverse LT, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 479 (Seat Heating System And Seat Cooling System) >> Diagnostic Information and Procedures >> DTC B1935 or B2180: Left/Right Seat Back Heater (With Memory A45) >> Circuit/System Testing

Circuit/System Testing

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B1935 0A, B1935 0B, B1935 0C, B1935 0D, B1935 0E, B1935 04, or B1935 1F

  1. Ignition OFF, disconnect the X3 harness connector at the K40 Seat Memory Control Module.
  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 X3 harness connector at the K40 Seat Memory Control Module and disconnect the X1 harness connector at the K40 Seat Memory Control Module.
    4. IMPORTANT:

    When measuring the resistance, the resistance values are based on the seat being at room temperature of 20°C (68°F).

  4. Test for 6-14.1 Ω between control circuit terminal 6 and control circuit terminal 1.
    • If less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the E14A Seat Heating Element - Driver Back.
    • If greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal, replace the E14A Seat Heating Element - Driver Back.
  5. Ignition OFF, disconnect the X2 and X5 harness connectors at the K40 Seat Memory Control Module.
  6. Test for 3.3 k-300 kΩ between the signal circuit terminal 4 X5 and the low reference circuit terminal 2 X2.
    • If less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the E14A Seat Heating Element - Driver Back.
    • If greater than the specified range, test the signal circuit and low reference circuit for a short to voltage or an open/high resistance. If the circuits test normal, replace the E14A Seat Heating Element - Driver Back.
  7. Ignition OFF, connect the X1, X2, and X5 harness connectors at the K40 Seat Memory Control Module.
  8. Disconnect the harness connector at the E14A Seat Heating Element - Driver Back.
  9. Ignition ON, test for 4.8-5.2 V between the signal circuit terminal 3 and ground.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K40 Seat Memory Control Module.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K40 Seat Memory Control Module.
  10. If all circuits test normal, replace the K40 Seat Memory Control Module.

B2180 0A, B2180 0B, B2180 0C, B2180 0D, B2180 0E, B2180 04, or B2180 1F

  1. Ignition OFF, disconnect the X3 harness connector at the K40 Seat Memory Control Module.
  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 X3 harness connector at the K40 Seat Memory Control Module and disconnect the X1 harness connector at the K40 Seat Memory Control Module.
    4. IMPORTANT:

    When measuring the resistance, the resistance values are based on the seat being at room temperature of 20°C (68°F).

  4. Test for 6-14.3 Ω between control circuit terminal 14 and control circuit terminal 4.
    • If less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the E14C Seat Heating Element - Passenger Back.
    • If greater than the specified value, test the control circuits for an open/high resistance. If the circuits test normal, replace the E14C Seat Heating Element - Passenger Back.
  5. Ignition OFF, disconnect the X2 and X5 harness connectors at the K40 Seat Memory Control Module.
  6. Test for 3.3 k-300 kΩ between the signal circuit terminal 3 X5 and the low reference circuit terminal 5 X2.
    • If less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the E14C Seat Heating Element - Passenger Back.
    • If greater than the specified range, test the signal circuit and low reference circuit for a short to voltage or an open/high resistance. If the circuits test normal, replace the E14C Seat Heating Element - Passenger Back.
  7. Ignition OFF, connect the X1, X2, and X5 harness connectors at the K40 Seat Memory Control Module.
  8. Disconnect the harness connector at the E14C Seat Heating Element - Passenger Back.
  9. Ignition ON, test for 4.8-5.2 V between the signal circuit terminal 3 and ground.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K40 Seat Memory Control Module.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K40 Seat Memory Control Module.
  10. If all circuits test normal, replace the K40 Seat Memory Control Module.
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