Circuit/System Testing

WARNING: This page is about a different car, the 2017 GMC Acadia. 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. Disconnect Ground Connection
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 14 @ 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