B164C

B164C - Driver Mirror Signal Lamp Control Circuit High

For a complete wiring diagram, refer to.

• When Monitored: Continuously.






Test Step 1 - Test for an Intermittent Condition

• Turn the ignition ON.

• With the scan tool, erase all DTCs.

• Operate the turn signal switch in both directions several times.

• Cycle the ignition from on to off 3 times.

• Turn the ignition ON.

• With the scan tool, check for DTCs.

Does the scan tool display B164C - Mirror Signal Lamp Control Circuit High?

Yes

• Go to Test Step 2

No

• The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 2 - Inspect Mirror Connections

• Turn the ignition OFF.

• Disconnect the driver outside rearview mirror connector at the drivers door module harness connector.

• Inspect the wiring and connectors between the mirror and the drivers door module.

Were there any problems found?

Yes

• Repair as necessary.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

No

• Go to Test Step 3.

Test Step 3 - Mirror Assembly

• Turn the ignition OFF.

• Replace the drivers power mirror assembly.

• Turn the ignition ON.

• Operate the turn signal switch in both directions several times.

• With the scan tool, check for DTCs.

Does the scan tool display B164C - Mirror Signal Lamp Control Circuit Low?

Yes

• Replace the driver door module.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

No

• Test complete.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior