B1611

B1611-AMBIENT LIGHT SENSOR INPUT CIRCUIT HIGH (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 high voltage threshold.





Diagnostic Test

1.VERIFY DTC B1611-LEFT SOLAR SENSOR CIRCUIT LOW IS 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 (L24) AUTO HEADLAMPS SIGNAL CIRCUIT VOLTAGE

Turn the ignition off.

Disconnect the Sun Sensor harness connector.

Turn the ignition on.

Measure the voltage of the (L24) Auto Headlamps Signal circuit.

What voltage is present?

Above 5.2 Volts

- Go To 3

4.8 Volts to 5.2 Volts

- Go To 4

Below 4.8 Volts

- Go To 6

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

Turn the ignition off.

Disconnect the A/C Heater Control C1 harness connector.

Turn the ignition on.

Measure the voltage of the (L24) Auto Headlamps Signal circuit.

Is there any voltage present?

Yes

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

No

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

4.CHECK (C121) SENSOR GROUND CIRCUIT FUNCTION

Turn the ignition off.

Connect a jumper wire between the (L24) Auto Headlamps Signal circuit and the (C121) Sensor Ground circuit in the Sun Sensor harness connector.

Turn the ignition on.

With the scan tool in HVAC, select Data Display and read the Ambient Light Sensor voltage.

Is the voltage below 0.2 volts?

Yes

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

No

- Go To 5

5.CHECK (C121) SENSOR GROUND CIRCUIT FOR AN OPEN

Turn the ignition off.

Disconnect the A/C Heater Control C1 harness connector.

Measure the resistance of the (C121) Sensor Ground circuit between the Sun Sensor harness connector and the A/C Heater Control C1 harness connector.

Does the ohm meter read open circuit?

Yes

- Repair the (C121) Sensor Ground circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

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

6.CHECK (L24) AUTO HEADLAMPS SIGNAL CIRCUIT FOR AN OPEN

Turn the ignition off.

Disconnect the A/C Heater Control C1 harness connector.

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

Does the ohm meter read open circuit?

Yes

- Repair the (L24) Auto Headlamps Signal circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

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