Circuit/System Testing

Ignition OFF, disconnect the X1 and X2 harness connectors at the S64D Seat Adjuster Switch - Driver.
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
- Driver Lumbar Support Horizontal Switch
- If not Inactive
1. Ignition OFF, disconnect the X5 harness connector at the K40 Seat Memory Control Module, ignition ON.
2. Test for infinite resistance between the appropriate signal circuit terminal listed below and ground:
  - Front vertical up switch terminal 1 X1
  - Front vertical down switch terminal 5 X1
  - Rear vertical up switch terminal 8 X1
  - Rear vertical down switch terminal 10 X1
  - Horizontal forward switch terminal 3 X1
  - Horizontal rearward switch terminal 7 X1
  - Recline forward switch terminal 4 X1
  - Recline rearward switch terminal 9 X1
  - Driver seat lumbar forward terminal 2 X2
  - Driver seat lumbar rearward terminal 6 X2
  - 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 3 A fused jumper wire between the ground circuit terminal 6 X1 and the appropriate signal circuit terminal listed below:
- Front vertical up switch terminal 1 X1
- Front vertical down switch terminal 5 X1
- Rear vertical up switch terminal 8 X1
- Rear vertical down switch terminal 10 X1
- Horizontal forward switch terminal 3 X1
- Horizontal rearward switch terminal 7 X1
- Recline forward switch terminal 4 X1
- Recline rearward switch terminal 9 X1
- Driver seat lumbar forward terminal 2 X2
- Driver seat lumbar rearward terminal 6 X2
Verify the appropriate scan tool seat switch parameter is Forward/Rearward or UP/Down.
- If not Forward/Rearward or UP/Down
1. Ignition OFF, disconnect the X5 harness connector at the K40 Seat Memory Control Module, ignition ON.
2. Test for less than 1 V between the signal circuit terminal and ground.
  - If 1 V or greater, repair the short to voltage on the circuit.
  - If less than 1 V
3. Ignition OFF.
4. Test for less than 2 Ω in the signal circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, replace the K40 Seat Memory Control Module.
- If Forward/Rearward or UP/Down
Test or replace the S64D Seat Adjuster Switch - Driver.