Circuit/System Testing

Ignition OFF, disconnect the X1 harness connector at the appropriate Outside Rearview Mirror. Ignition ON
Connect a test lamp between the control circuit terminal 1 and control circuit terminal 2.
Verify the test lamp turns ON when commanding the Mirror Fold states with a scan tool.
- If the test lamp remains OFF during either of the commands
1. Ignition OFF, remove the test lamp, disconnect the harness connector at the Door Lock/Window Switch.
2. Test for infinite resistance between each control circuit and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - If infinite resistance
3. Test for less than 2 Ω in each control circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, replace the Door Lock/Window Switch.
- If the test lamp is always ON
1. Ignition OFF, remove the test lamp, disconnect the harness connector at the Door Lock/Window Switch, ignition ON.
2. Test for less than 1 V between each control circuit and ground.
  - If 1 V or greater, repair the short to voltage on the circuit.
  - If less than 1 V, replace the Door Lock/Window Switch
- If the test lamp turns ON during each of the commands
Test or replace the A9 Outside Rearview Mirror.