Circuit/System Testing

WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

Ignition/Vehicle & All vehicle systems - Off
Disconnect the electrical connector:S48A Multifunction Switch - Instrument Panel
Test for less than 10 ohms between the test points:Ground circuit terminal 14 & Ground
- If 10 ohms or greater
1. Disconnect the ground connection:<p01>
2. Test for less than 2 ohms between the test points:Ground circuit terminal 14@Component harness & Ground
  - 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
Ignition - On / Vehicle - In Service Mode
Verify the scan tool parameter:Parking Assist Switch = Inactive
- If not the specified state
1. Ignition/Vehicle - Off
2. Disconnect the electrical connector:K182 Parking Assist Control Module
3. Test for infinite resistance between the test points:Signal circuit terminal 5@Component harness & Ground
  - If less than infinite resistance - Repair the short to ground on the circuit.
  - If infinite resistance - Replace the component:K182 Parking Assist Control Module
- Go to next step: If the specified state
Connect a 3 A fused jumper wire between the test points:Signal circuit terminal 5 & Ground
Verify the scan tool parameter:Parking Assist Switch = Active
- If not the specified state
1. Ignition/Vehicle - Off & Remove - Jumper wire(s)
2. Disconnect the electrical connector:K182 Parking Assist Control Module
3. Ignition - On / Vehicle - In Service Mode
4. Test for less than 1 V between the test points:Signal circuit terminal 5@Component harness & Ground
  - If 1 V or greater - Repair the short to voltage on the circuit.
  - Go to next step: If less than 1 V
5. Ignition/Vehicle - Off
6. Test for less than 2 ohms between the test points:Signal circuit terminal 5@Component harness & Terminal 8@Control module harness
  - If 2 ohms or greater - Repair the open/high resistance in the circuit.
  - If less than 2 ohms - Replace the component:K182 Parking Assist Control Module
- Go to next step: If the specified state
Connect a test lamp between the test points:Control circuit terminal 8 & B+
Perform the appropriate scan tool control function:Parking Assist Switch LED - Cycle On and Off
- If the test lamp is always Off
1. Ignition/Vehicle - Off & Remove - Jumper wire(s)
2. Disconnect the electrical connector:K182 Parking Assist Control Module
3. Test for less than 2 ohms between the test points:Control circuit terminal 8@Component harness & Terminal 3@Control module harness
  - If 2 ohms or greater - Repair the open/high resistance in the circuit.
  - If less than 2 ohms - Replace the component:K182 Parking Assist Control Module
- If the test lamp is always On
1. Ignition/Vehicle - Off & Remove - Jumper wire(s)
2. Disconnect the electrical connector:K182 Parking Assist Control Module
3. Test for infinite resistance between the test points:Control circuit terminal 8@Component harness & Ground
  - If less than infinite resistance - Repair the short to ground on the circuit.
  - If infinite resistance - Replace the component:K182 Parking Assist Control Module
- Go to next step: If the test lamp turns On and Off
Test for greater than 3 V between the test points:Control circuit terminal 3@Component harness & Ground
- If less than 3 V
  Refer to:Interior Backlighting Malfunction
- Go to next step: If greater than 3 V
Test or replace the component:S48A Multifunction Switch - Instrument Panel