Test G: The Autolamps Are On Continuously

PINPOINT TEST G: THE AUTOLAMPS ARE ON CONTINUOUSLY

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.

If the SJB detects a fault with the headlamp switch inputs, the exterior lamps are faulted on.

- DTC B1696 (Autolamp On Circuit Short to Ground) - is an on-demand DTC that sets when the SJB detects a short to ground from the autolamps on input circuit.
- DTC B1791 (Autolamp Sensor Input Circuit Open) - 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 (Wipers On Signal Circuit Short to Ground) - is an on-demand DTC that sets when the SJB detects a short to ground from the wipers on input circuit.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Light sensor
- Headlamp switch
- Windshield wiper motor
- SJB

G1-G2:

G3-G6:

G6-G9:

G9-G12:

G12-G13: