Test D: The Headlamp(s) Are On Continuously

PINPOINT TEST D: THE HEADLAMP(S) ARE ON CONTINUOUSLY

D1-D2:

D2-D5:

D6-D9:

D10-D15:

D15-D16:

Normal Operation - Low Beams
The smart junction box (SJB) sends reference signals to the headlamp switch through circuits CLF19 (VT/GN), CLF23 (WH/VT), CLS34 (GY) and CLF18 (BU/WH). At any given time, the headlamp switch routes one of the input circuits to ground through joint connector 6 through circuit GD116 (BK/VT).

When the SJB detects the headlamp switch in the HEADLAMPS ON position and the multifunction switch in the LOW BEAM position, the SJB provides voltage through circuits CLF04 (BN/BU) and CLF05 (BU/GN) to the LH and RH low beam headlamps, respectively.

Normal Operation - High Beam Headlamps
The SJB sends a reference signal to the multifunction switch through circuits CLF27 (GN/BN) and CLF17 (WH/OG). When the multifunction switch is placed in the FLASH-TO-PASS or HIGH BEAM position, the voltage signal is routed to ground. When the SJB detects a request for flash-to-pass or high beams (when the low beams are on), the SJB energizes the high beam relay (integrated into the SJB), which routes voltage through circuit CLF08 (YE/VT) to the headlamps.

DTC B1472 Lamp Headlamp Input Circuit Short to Ground - is an on-demand DTC that sets when the SJB detects the headlamps on input circuit is short to ground.

DTC B1510 Flash To Pass Switch Circuit Short to Ground - is an on-demand DTC that sets when the SJB detects the flash-to-pass request input circuit is short to ground.

DTC B1696 Autolamp On Circuit Short To Ground - is an on-demand DTC that sets when the SJB detects the autolamps on request input circuit is short to ground.

DTC B2008 Wipers On Signal Circuit Short to Ground - is an on-demand DTC that sets when the SJB detects the wipers on input circuit is short to ground.

DTC B2A22 Headlamp Off Circuit Open - is an on-demand DTC that sets when the SJB detects the headlamp switch off input circuit open.

DTC B2A23 High Beam Input Circuit Short to Ground - is an on-demand DTC that sets when the SJB detects a short to ground on the high beam request input circuit.

DTC B2A2E Right Front Lamp Low Beam Circuit Open - is an on-demand DTC that sets when the SJB detects the RH low beam output circuit shorted to voltage.

DTC B2A30 Left Front Lamp Low Beam Circuit Open - is an on-demand DTC that sets when the SJB detects the LH low beam output circuit shorted to voltage.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Joint connector
- Multifunction switch
- Headlamp switch
- SJB