Diagnostic Test

WARNING: This page is about a different car, the 2006 Dodge Magnum, 2006 Dodge Charger, and 2006 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

1) CHECK FOR DTC B1610-AMBIENT LIGHT SENSOR INPUT CIRCUIT LOW WITH SUN SENSOR HARNESS CONNECTOR DISCONNECTED

Fig 1: Sun Sensor Harness Connector
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the Sun 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: B1610-AMBIENT LIGHT SENSOR INPUT CIRCUIT LOW?

Yes
1. Go To 2).
No
1. Replace the Sun Sensor in accordance with the Service Information.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING) .
2) CHECK (L24) AUTO HEADLAMPS SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 2: Checking Auto Headlamps Signal Circuit For Short To Ground
Courtesy of DAIMLERCHRYSLER CORP.

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.

Is the resistance below 10k ohms?

Yes
1. Repair the (L24) Auto Headlamps Signal circuit for a short to ground.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING) .
No
1. Go To 3).
3) CHECK (L24) AUTO HEADLAMPS SIGNAL CIRCUIT FOR A SHORT TO (G939) SUN SENSOR RETURN CIRCUIT

Fig 3: Checking Auto Headlamps Signal Circuit For Short To Sun Sensor Return Circuit
Courtesy of DAIMLERCHRYSLER CORP.

Measure the resistance between the (L24) Auto Headlamps Signal circuit and the (G939) Sun Sensor Return circuit in the A/C Heater Control C1 harness connector.

Is the resistance below 10k ohms?

Yes
1. Repair the (L24) Auto Headlamps Signal circuit for a short to the (G939) Sun Sensor Return circuit.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING) .
No
1. Replace the A/C Heater Control in accordance with the Service Information.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING) .