B1610

B1610-AMBIENT LIGHT SENSOR INPUT CIRCUIT LOW (ATC)

For a complete wiring diagram refer to Diagrams/Electrical.

- When Monitored:

With the ignition on.

- Set Condition:

If the Ambient Light Sensor input is out of range toward the low voltage threshold.





Diagnostic Test

1.VERIFY DTC B1610-AMBIENT LIGHT SENSOR INPUT CIRCUIT LOW ACTIVE

Turn the ignition on.

With the scan tool, erase DTCs.

Turn the ignition off, wait 10 seconds, and turn the ignition on.

With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- 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 - VER 1. Body Verification Test

2.CHECK FOR DTC B1610-AMBIENT LIGHT SENSOR INPUT CIRCUIT LOW WITH SUNLOAD SENSOR HARNESS CONNECTOR DISCONNECTED

Turn the ignition off.

Disconnect the Sunload Sensor harness connector.

Turn the ignition on.

With the scan tool, erase HVAC DTCs.

Turn the ignition off, wait 10 seconds, and turn the ignition on.

With the scan tool, read HVAC DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 3

No

- Replace the Sunload Sensor.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

3.CHECK (L24) AUTO HEADLAMPS SIGNAL CIRCUIT FOR A SHORT TO GROUND

Turn the ignition off.

Disconnect the A/C Heater Control C1 harness connector.

Measure the resistance of the (L24) Auto Headlamps Signal circuit between ground and the A/C Heater Control C1 harness connector.

Does the ohm meter read open circuit?

Yes

- Replace the A/C Heater Control.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Repair the (L24) Auto Headlamps Signal circuit for a short to ground.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test