Test G: The Autolamps Are On Continuously

PINPOINT TEST G: THE AUTOLAMPS ARE ON CONTINUOUSLY

G1-G2:

G3-G7:

G7-G9:

G10-G13:

Normal Operation
The smart junction box (SJB) sends reference signals to the headlamp switch through circuits CLF18 (BU/WH), CLF19 (VT/GN), CLF23 (WH/VT) and CLS34 (GY). The SJB also sends a reference signal to the light sensor through circuit VLF14 (BU/BN). Ground for the light sensor is sent through circuit GD145 (BK/BU). When the headlamp switch is placed in the AUTOLAMPS ON position, the voltage signal is routed to ground through circuit GD145 (BK/BU). When the SJB detects the headlamp switch in the AUTOLAMPS ON position, the SJB sends out voltage to the exterior lamps if the ambient light conditions are dark. The light sensor determines the amount of light based on the input received from the ambient sky conditions. When the ambient level has reached a point (determined by the internal programming of the SJB), the SJB sends voltage to the headlamps, parking, and license plate lamps.

The SJB also sends a reference signal to the windshield wiper motor through circuit CRW22 (WH/BU). When the windshield wiper motor is on, the reference signal is routed to ground.

DTC B1696 - is an on-demand DTC that sets when the SJB detects a short to ground from the autolamps on input circuit.

DTC B1791 - is a continuous and on-demand DTC that sets when the SJB detects an open or short to voltage from the light sensor input circuit.

DTC B2008 - is an on-demand DTC that sets when the SJB detects a short to ground from the wipers on input circuit.

Possible Causes
- Circuit CLF18 (BU/WH) short to ground
- Circuit CLF19 (VT/GN) open or short to ground
- Circuit CLF23 (WH/VT) open
- Circuit CLS34 (GY) open
- Circuit CRW22 (WH/BU) short to ground
- Circuit GD145 (BK/BU) open
- Circuit VLF14 (BU/BN) open or short to voltage
- Light sensor
- Headlamp switch
- Windshield wiper motor
- SJB