Pinpoint Test N: The Hazard Lamps Are Inoperative/Always On
Turn Signal and Hazard Lamps
Pinpoint Tests
Pinpoint Test N: The Hazard Lamps Are Inoperative/Always On
Refer to Wiring Diagram Set 90, Turn Signal/Stop/Hazard Lamps for schematic and connector information. Diagrams By Number
Normal Operation
The Smart Junction Box (SJB) sends a voltage reference signal to the multifunction switch through circuit CLS32 (BN/YE). When the hazard switch is switched on, the voltage signal is routed to ground. When the SJB detects a request for the hazard lamps, the SJB sends voltage to the appropriate turn lamps.
- DTC B2071 (Hazard Switch Signal Short to Ground) - an on-demand DTC that sets when the SJB detects a short to ground from the hazard switch input circuit.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Multifunction switch
- SJB
PINPOINT TEST N: THE HAZARD LAMPS ARE INOPERATIVE/ALWAYS ON
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
-------------------------------------------------
N1 CHECK FOR CORRECT HIGH BEAM OPERATION
- Place the headlamp switch in the HEADLAMPS ON position.
- Place the multifunction switch in the HIGH BEAM position while observing the high beam headlamps.
- Do the high beams illuminate?
Yes
PLACE the headlamp switch in the OFF position. GO to N2.
No
REFER to Headlamps Testing and Inspection.
-------------------------------------------------
N2 CHECK THE RECORDED DTCs FROM THE SJB SELF-TEST
- Check the recorded results from the SJB self-test.
- Is DTC B2071 present?
Yes
GO to N5.
No
GO to N3.
-------------------------------------------------
N3 CHECK THE MULTIFUNCTION SWITCH (HAZARD LAMPS INOPERATIVE)
- Ignition OFF.
- Disconnect: Multifunction Switch C202.
- Carry out the multifunction switch component test.
- Is the multifunction switch OK?
Yes
GO to N4.
No
INSTALL a new multifunction switch. TEST the system for normal operation.
-------------------------------------------------
N4 CHECK CIRCUIT CLS32 (BN/YE) FOR AN OPEN
- Disconnect: SJB C2280d.
- Measure the resistance between the multifunction switch C202-1, circuit CLS32 (BN/YE), harness side and the SJB C2280d-4, circuit CLS32 (BN/YE), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to N7.
No
REPAIR the circuit. TEST the system for normal operation.
-------------------------------------------------
N5 CHECK THE MULTIFUNCTION SWITCH (HAZARD LAMPS ALWAYS ON)
- Ignition OFF.
- Disconnect: Multifunction Switch C202.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: SJB Self-Test.
- Clear the DTCs and repeat the SJB on-demand self-test.
- Is DTC B2071 still present?
Yes
GO to N6.
No
INSTALL a new multifunction switch. TEST the system for normal operation.
-------------------------------------------------
N6 CHECK CIRCUIT CLS32 (BN/YE) FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: SJB C2280d.
- Measure the resistance between the multifunction switch C202-1, circuit CLS32 (BN/YE), harness side and ground.
- Is the resistance greater than 10,000 ohms?
Yes
GO to N7.
No
REPAIR the circuit. TEST the system for normal operation.
-------------------------------------------------
N7 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new SJB. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
-------------------------------------------------