Circuit/System Testing

WARNING: This page is about a different car, the 2017 Cadillac ATS. 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: T22 Mobile Device Wireless Charger Module
Test for less than 10 Ω between the test points: Ground circuit terminal 2 & Ground
- If 10 Ω or greater
1. Disconnect ground terminal.
2. Test for less than 2 Ω between the test points: Ground circuit terminal 2 @ Component harness & The other end of the circuit @ Ground terminal
  - 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.
- If less than 10 Ω
Ignition » On / Vehicle » In Service Mode
Verify a test lamp turns On between the test points: Ignition circuit terminal 1 & Ground
- If the test lamp does not turn On and the circuit fuse is OK
1. Remove » Test Lamp
2. Test for less than 2 Ω between the test points: Ignition circuit terminal 1 & Output terminal @ Fuse
  - If 2 Ω or greater » Repair the open/high resistance in the circuit.
  - If less than 2 Ω Refer to:Retained Accessory Power Malfunction
- If the test lamp does not turn On and the circuit fuse is open
1. Remove » Test Lamp
2. Test for infinite resistance between the test points: Ignition circuit terminal 1 & Ground
  - If less than infinite resistance » Repair the short to ground on the circuit.
  - If infinite resistance » Replace the component: T22 Mobile Device Wireless Charger Module.
- If the test lamp turns On
Verify the function: Wireless Charging Indicator = Off
- If the indicator is On
1. Ignition/Vehicle » Off
2. Disconnect the electrical connector: K9 Body Control Module
3. Test for infinite resistance between the test points: Signal circuit terminal 3 @ Component harness & Ground
  - If less than infinite resistance » Repair the short to ground on the circuit.
  - If infinite resistance » Replace the component:K9 Body Control Module
- If the indicator is Off
Connect a 3 A fused jumper wire between the test points: Signal circuit terminal 3 & Ground circuit terminal 2
Verify the function: Wireless Charging Indicator = On
- If the indicator is Off
1. Ignition/Vehicle » Off & Remove » Jumper wire(s)
2. Disconnect the electrical connector: K9 Body Control Module
3. Ignition » On / Vehicle » In Service Mode
4. Test for less than 1 V between the test points: Signal circuit terminal 3 @ Component harness & Ground
  - If 1 V or greater » Repair the short to voltage on the circuit.
  - If less than 1 V
5. Ignition/Vehicle » Off
6. Test for less than 2 Ω between the test points: Signal circuit terminal 3 @ Component harness & The other end of the circuit @ Control module harness
  - If 2 Ω or greater » Repair the open/high resistance in the circuit.
  - If less than 2 Ω » Replace the component: K9 Body Control Module
- If the indicator is On
Test or replace the component: T22 Mobile Device Wireless Charger Module