Test 13A: Sun Load Sensor Failure

WARNING: This page is about a different car, the 1998 Dodge Intrepid and 1998 Chrysler Concorde. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Perform TEST 1B: IDENTIFYING ATC SYSTEM BCM DIAGNOSTIC TROUBLE CODES before proceeding with this test. DTC 27 will set if BCM detects an abnormally low voltage (less than 0.313 volt) on sun load sensor input.

Using scan tool, read SUN SENSOR voltage. If voltage is less than 0.2 volt, go to next step. If voltage is more than 0.2 volt, replace BCM. Perform VERIFICATION TEST .
Locate sun load sensor at top center of dashboard, near windshield. Disconnect sensor connector and ensure connector terminals are clean and tight. Repair as necessary. Using scan tool, read SUN LOAD sensor voltage. If voltage is less than 0.2 volt, go to next step. If voltage is more than 0.2 volt, replace sun load sensor. Perform VERIFICATION TEST .
Locate Body Control Module (BCM), attached to junction block, at left end of instrument panel. Turn ignition off. Disconnect BCM Black 24-pin connector (C2). Ensure connector terminals are clean and tight. Repair as necessary.
Using an ohmmeter, measure resistance between ground and BCM connector C2 terminal No. 10 (Dark Blue wire). If resistance is less than 60.0 ohms, repair short to ground in Dark Blue wire between BCM connector C2 and sun load sensor. If resistance is more than 60.0 ohms, replace BCM. Perform VERIFICATION TEST .