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:A23D Door Latch Assembly - Driver
Test for less than 10 Ω between the test points:Ground circuit terminal 3 &Ground
- If 10 Ω or greater
1. Ground Connection»Disconnect
2. Test for less than 2 Ω between the test points:Ground circuit terminal 3 @Component harness&Ground Connection
  - 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
Test for greater than 10 V between the test points:Signal circuit terminal 4&Ground circuit terminal 3
- If 10 V or less
1. Ignition/Vehicle » Off
2. Disconnect the electrical connector:S79D Window Switch - Driver
3. Test for infinite resistance between the test points:Signal circuit terminal 4@Component harness&Ground
  - If less than infinite resistance » Repair the short to ground on the circuit.
  - If infinite resistance
4. Test for less than 2 Ω between the test points:Signal circuit terminal 4@Component harness&Signal circuit terminal 7@S79D Window Switch - Driver
  - If 2 Ω or greater » Repair the open/high resistance in the circuit.
  - If less than 2 Ω » Replace the component:S79D Window Switch - Driver
- If greater than 10 V
Test or replace the component:A23D Door Latch Assembly - Driver