Pinpoint Test 2: The Autolamps Are On Continuously
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PINPOINT TEST 2: THE AUTOLAMPS ARE ON CONTINUOUSLY - HYBRID
Normal Operation
The smart junction box (SJB) sends a voltage signal to the headlight switch through circuit (V/G) and a voltage signal to the light sensor through circuit (L/BR). Ground for the light sensor is provided by circuit (B/L).
When the headlight switch is placed in the AUTOLAMPS ON position, the voltage signal is routed to ground. When the SJB detects the headlight switch in the AUTOLAMPS ON position, the SJB monitors the light sensor input. The light sensor determines the amount of light based on the input received from the ambient lighting conditions. When the ambient level has reached a point (determined by the internal programming of the SJB), the SJB provides voltage to the headlamps, parking and license plate lamps.The SJB also monitors the windshield wiper motor status by sending a voltage signal to the wiper motor through circuit (W). When the windshield wiper is on (except during a mist wipe or while the wipers are on to clear washer fluid during a wash condition), the wiper motor grounds circuit (W) to indicate to the SJB that the wipers are on.
- DTC B1696 (Autolamp On Circuit Short To Ground) - an on-demand DTC that sets when the SJB detects the autolamps on input circuit shorted to ground.
- DTC B1791 (Autolamp Sensor Input Circuit Open) - an on-demand DTC that sets when the SJB detects an open on the light sensor input circuit.
- DTC B1793 (Autolamp Sensor Input Circuit Short to Ground) - a continuous and on-demand DTC that sets when the SJB detects a short to ground on the light sensor input circuit.
- DTC B2008 (Wipers On Signal Circuit Short to Ground) - an on-demand DTC that sets when the SJB detects the wipers on input circuit is short to ground.
Possible Causes
- Wiring, terminals or connectors
- Light sensor
- Headlight switch
- Windshield wiper motor
- SJB
Diagnostic Procedure
CAUTION:Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
Step 1-Step 5:
Step 6-Step 9:
Step 10-Step 14:
Step 15:
