Circuit/System Testing

Ignition/Vehicle - Off.
Disconnect the electrical connector: K17 Electronic Brake Control Module
Ignition - On / Vehicle - In Service Mode
Test for less than 1 V between the test points:
- Terminal 16@K17 Electronic Brake Control Module & Ground
- Terminal 32@K17 Electronic Brake Control Module & Ground
- Terminal 9@K17 Electronic Brake Control Module & Ground
- Terminal 15@K17 Electronic Brake Control Module & Ground
- Terminal 31@K17 Electronic Brake Control Module & Ground
- Terminal 8@K17 Electronic Brake Control Module & Ground
- If 1 V or greater
  Repair the short to voltage on the circuit:
- Go to next step: If less than 1 V
Ignition/Vehicle - Off
Test for infinite resistance between the test points:
- Terminal 16@K17 Electronic Brake Control Module & Ground
- Terminal 32@K17 Electronic Brake Control Module & Ground
- Terminal 9@K17 Electronic Brake Control Module & Ground
- Terminal 15@K17 Electronic Brake Control Module & Ground
- Terminal 31@K17 Electronic Brake Control Module & Ground
- Terminal 8@K17 Electronic Brake Control Module & Ground
- If less than infinite resistance
  Repair the short to ground on the circuit.
- Go to next step: If infinite resistance
Test for less than 5 ohms between the test points: Terminal 32 & Terminal 31
- If 5 ohms or greater
1. Ignition/Vehicle - Off
2. Disconnect the electrical connector: S91 Park Brake Control Switch
3. Test for less than 2 ohms between the test points:
  - Terminal 32@Control module harness & The other end of the circuit@Component harness
  - Terminal 31@Control module harness & The other end of the circuit@Component harness
  - If 2 ohms or greater - Repair the open/high resistance in the circuit.
  - If less than 2 ohms - Replace the component: S91 Park Brake Control Switch
- Go to next step: If less than 5 ohms
Test for less than 5 ohms between the test points: Terminal 8 & Terminal 15
- If 5 ohms or greater
1. Ignition/Vehicle - Off
2. Disconnect the electrical connector: S91 Park Brake Control Switch
3. Test for less than 2 ohms between the test points:
  - Terminal 8@Control module harness & The other end of the circuit@Component harness
  - Terminal 15@Control module harness & The other end of the circuit@Component harness
  - If 2 ohms or greater - Repair the open/high resistance in the circuit.
  - If less than 2 ohms - Replace the component: S91 Park Brake Control Switch
- Go to next step: If less than 5 ohms
Test for less than 5 ohms between the test points: Terminal 9 & Terminal 16
- If 5 ohms or greater
1. Ignition/Vehicle - Off
2. Disconnect the electrical connector: S91 Park Brake Control Switch
3. Test for less than 2 ohms between the test points:
  - Terminal 9@Control module harness & The other end of the circuit@Component harness
  - Terminal 16@Control module harness & The other end of the circuit@Component harness
  - If 2 ohms or greater - Repair the open/high resistance in the circuit.
  - If less than 2 ohms - Replace the component: S91 Park Brake Control Switch
- Go to next step: If less than 5 ohms
Test for less than 5 ohms between the test points: Terminal 9 & Terminal 31 - Control Switch Pressed
- If 5 ohms or greater
  Replace the component: S91 Park Brake Control Switch
- Go to next step: If less than 5 ohms
Test for less than 5 ohms between the test points: Terminal 9 & Terminal 15 - Control Switch Pressed
- If 5 ohms or greater
  Replace the component: S91 Park Brake Control Switch
- Go to next step: If less than 5 ohms
Ignition/Vehicle & All vehicle systems - Off
Disconnect the electrical connector: S91 Park Brake Control Switch
Test for less than 10 ohms between the test points: Terminal 8@S91 Park Brake Control Switch & Ground
- If 10 ohms or greater
1. Ignition/Vehicle - Off
2. Test for less than 2 ohms between the test points: Terminal 8@S91 Park Brake Control Switch & The other end of the circuit@Ground Connection
  - If 2 ohms or greater - Repair the open/high resistance in the circuit.
  - If less than 2 ohms - Repair the open/high resistance in the ground connection.
- Go to next step: If less than 10 ohms
Replace the component: S91 Park Brake Control Switch
Operate the vehicle within the Conditions for Running the DTC.
Verify the DTC does not set.
- If the DTC is set
  Replace the component: K17 Electronic Brake Control Module
- Go to next step: If the DTC does not set
All OK.