Circuit/System Testing

Ignition OFF, disconnect the harness connector at the S64D Driver Seat Adjuster Switch, Ignition ON.
Verify that all scan tool driver seat switch parameters listed below are Inactive:
- Driver Seat Cushion Front Vertical Switch
- Driver Seat Cushion Rear Vertical Switch
- Driver Seat Horizontal Switch
- Driver Seat Back Switch
- If not Inactive
1. Ignition OFF, disconnect the harness connector at the K40 Seat Memory Control Module.
2. Test for infinite resistance between the appropriate signal circuit terminal listed below and ground:
  - Front vertical upward switch terminal A
  - Front vertical downward switch terminal K
  - Rear vertical upward switch terminal F
  - Rear vertical downward switch terminal J
  - Horizontal forward switch terminal D
  - Horizontal rearward switch terminal C
  - Recline forward switch terminal H
  - Recline rearward switch terminal G
  - If less than infinite resistance, repair the short to ground on the circuit.
  - If infinite resistance, replace the K40 Seat Memory Control Module.
- If Inactive
Install a 3A fused jumper wire between the appropriate signal circuit terminal listed below and the ground circuit terminal E.
- Front vertical upward switch terminal A
- Front vertical downward switch terminal K
- Rear vertical upward switch terminal F
- Rear vertical downward switch terminal J
- Horizontal forward switch terminal D
- Horizontal rearward switch terminal C
- Recline forward switch terminal H
- Recline rearward switch terminal G
Verify the scan tool seat switch parameter is Forward/Rearward or UP/Down.
- If not Forward/Rearward or UP/Down
1. Ignition OFF, disconnect the harness connector at the K40 Seat Memory Control Module, ignition ON.
2. Test for less than 1V between the signal circuit terminal and ground.
  - If 1V or greater, repair the short to voltage on the circuit.
  - If less than 1V
3. Ignition OFF.
4. Test for less than 2Ω in the signal circuit end to end.
  - If 2Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2Ω, replace the K40 Seat Memory Control Module.
- If Forward/Rearward or UP/Down
Test or replace the S64D Driver Seat Adjuster Switch.