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Home >> Pontiac >> 2009 >> Vibe Base, 2.4 0, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 46 (Power Seat System) >> Diagnostic Information and Procedures >> Power Seat Inoperative (With Memory A45) >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

Seat Adjuster Switch Circuit Test

  1. Ignition OFF, disconnect the harness connector at the seat adjuster switch.
  2. Ignition ON, verify that a test lamp illuminates between the B+ reference circuit terminal E and ground.
    • If the test lamp does not illuminate, test the B+ reference circuit for a short to ground or an open/high resistance.
  3. Verify the scan tool power seat switch parameters are Inactive.
    • If not the specified values, test the appropriate signal circuit listed for a short to voltage. If the circuit tests normal, replace the MSM.
      • Front vertical down switch terminal K
      • Front vertical up switch terminal A
      • Horizontal forward switch terminal D
      • Horizontal rearward switch terminal C
      • Rear vertical down switch terminal J
      • Rear vertical up switch terminal F
      • Recline forward switch terminal H
      • Recline rearward switch terminal G
  4. Install a 3A fused jumper wire between the B+ circuit terminal E and the appropriate signal circuit listed below. Verify the appropriate scan tool seat switch parameter is Active.
    • Front vertical down switch terminal K
    • Front vertical up switch terminal A
    • Horizontal forward switch terminal D
    • Horizontal rearward switch terminal C
    • Rear vertical down switch terminal J
    • Rear vertical up switch terminal F
    • Recline forward switch terminal H
    • Recline rearward switch terminal G
    • If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the MSM.
  5. If all circuits test normal, test or replace the seat adjuster switch.

Seat Motor Control Circuit Test

  1. Ignition OFF, disconnect the X3 harness connector at the MSM.
  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 MSM and disconnect the X1 harness connector at the seat adjuster motor assembly.
  4. Connect a test lamp between the appropriate control circuits listed below.
    • Seat horizontal motor terminal 3 and terminal 6
    • Seat front vertical motor terminal 2 and terminal 5
    • Seat rear vertical motor terminal 1 and terminal 4
  5. Ignition ON, command the appropriate seat motor in the Up/Down or Forward/Rearward directions with a scan tool. The test lamp should turn ON when commanding the up and down or forward and rearward states.
    • If the test lamp remains OFF during either of the commands, test the control circuits for an open/high resistance. If the circuits test normal, replace the MSM.
  6. If all circuits test normal, test or replace the seat motor.

Recline Motor Control Circuit Test

  1. Ignition OFF, disconnect the harness connector at the recline motor.
  2. Connect a test lamp between control circuit terminal A and control circuit terminal B.
  3. Ignition ON, command the Recline Forward/Rearward with a scan tool. The test lamp should turn ON when commanding the forward and rearward states.
    • If the test lamp remains OFF during either of the commands, test the control circuits for an open/high resistance. If the circuits test normal, replace the MSM.
  4. If all circuits test normal, test or replace the recline motor.
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