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Chrysler 300/300 Touring/300C, Dodge Magnum. Manual - part 2315
•
When Monitored:
With the ignition on.
•
Set Condition:
If the Ambient Light Sensor input is out of range toward the low voltage threshold.
Possible Causes
(L24) AUTO HEADLAMPS SIGNAL CIRCUIT SHORTED TO GROUND
(L24) AUTO HEADLAMPS SIGNAL CIRCUIT SHORTED TO (G939) SUN SENSOR RETURN CIRCUIT
SUN SENSOR
A/C HEATER CONTROL
NOTE: This DTC must be active for the results of this test to be valid. Do not perform this test if this DTC
is stored. Refer to HVAC System Test (ATC) for stored DTC test procedures.
Diagnostic Test
1.
CHECK FOR DTC B1610–AMBIENT LIGHT SENSOR INPUT CIRCUIT LOW WITH SUN SENSOR HARNESS
CONNECTOR DISCONNECTED
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
>> Go To 2
No
>> Replace the Sun Sensor in accordance with the Service
Information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING).
2.
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.
Is the resistance below 10k ohms?
Yes
>> Repair the (L24) Auto Headlamps Signal circuit for a short
to ground.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING).
No
>> Go To 3
24 - 294
HVAC - ELECTRICAL DIAGNOSTICS
LX