Diesel Data: Automotive Repair

Test K: The Turn Signal Lamps Are Always On

PINPOINT TEST K: THE TURN SIGNAL LAMPS ARE ALWAYS ON

Normal Operation
The smart junction box (SJB) sends voltage reference signals to the multifunction switch through circuit CLS39 (VT/WH) (LH turn input) and circuit CLS41 (GY/YE) (RH turn input). When the multifunction switch is placed in the LH or RH TURN positions, the voltage signal is routed to ground through circuit GD134 (BK/VT). When the SJB detects the multifunction switch in the LH or RH TURN position, the SJB sends voltage to the appropriate turn lamps.

- DTC B2281 (Right Turn Switch Short to Ground) - is an on-demand DTC that sets when the SJB detects the RH turn signal switch input is short to ground.
- DTC B2282 (Left Turn Switch Short to Ground) - is an on-demand DTC that sets when the SJB detects the LH turn signal switch input is short to ground.

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


K1-K2:






K3: