Circuit/System Testing

Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S107 Parking Assist ON/OFF Switch. It may take up to 2 min for all vehicle systems to power down.
Test for less than 10 Ω between the control circuit terminal 3 and ground.
- If greater than 10 Ω
1. Ignition OFF.
2. Test for less than 2 Ω in the ground circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, repair the open/high resistance in the ground connection.
- Go to next step: If less than 10 Ω
Ignition ON, wait 30s
NOTE:
When the ignition is turned ON, there is a voltage spike of B+ for a few seconds and then the voltage drops to about 5V.
Test for 4 - 6V between the control circuit terminal 5 and ground.
- If less than 4V
1. Ignition OFF, disconnect the harness connector at the K41R Rear Parking Assist Control Module.
2. Test for infinite resistance between the 5V reference circuit and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - If infinite resistance
3. Test for less than 2 Ω in the 5V reference circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, replace the K41R Rear Parking Assist Control Module.
- If greater than 6V
1. Ignition OFF, disconnect the harness connector at the K41R Rear Parking Assist Control Module, ignition ON.
2. Test for less than 1V between the 5V reference circuit and ground.
  - If 1 V or greater, repair the short to voltage on the circuit.
  - If less than 1V, replace the K41R Rear Parking Assist Control Module.
- Go to next step: If between 4 - 6V
Test or replace the S107 Parking Assist ON/OFF Switch.