Test E: The Headlamps Are On Continuously

PINPOINT TEST E: THE HEADLAMPS 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). At any given time, the headlamp switch routes one of the input circuits to ground 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 to circuits CLF04 (BN/BU) and CLF05 (BU/GN).

Halogen Low Beam Headlamps
Circuits CLF04 (BN/BU) and CLF05 (BU/GN) carry voltage to the LH and RH low beam headlamps, respectively.

High Intensity Discharge (HID) Low Beam Headlamps
Circuits CLF04 (BN/BU) and CLF05 (BU/GN) carry voltage to the LH and RH HID relay coils, respectively. When the relays are energized, voltage is routed to the LH and RH headlamps through circuit CLF30 (VT/BN) and circuit CLF31 (YE/GY), respectively.

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 (regardless of headlamp switch position), or the headlamp switch in the HEADLAMPS ON position and the multifunction switch in the HIGH BEAM position, the SJB energizes an internal relay which routes voltage through circuit CLS08 (VT/GN) to the high beam headlamps.







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

E1-E2:

E2-E6:

E6-E12:

E12-E14: