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 flasher lamp switch is engaged, the voltage signal is routed to ground. When the SJB detects a request for the hazard lamps, the SJB provides on/off voltage to the all 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 flasher lamp 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.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
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N1 CHECK FOR CORRECT TURN SIGNAL OPERATION
- Ignition ON.
- Place the multifunction switch in the LH and RH TURN positions.
- Do the turn signals operate correctly?
Yes
GO to N2.
No
Go To Pinpoint Test K. Pinpoint Test K: The Turn Signal Lamps Are Inoperative
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N2 CHECK THE RECORDED DTCs FROM THE SJB SELF-TEST
- Check the recorded DTCs from the SJB self-test.
- Is DTC B2071 present?
Yes
GO to N3.
No
GO to N5.
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N3 CHECK THE MULTIFUNCTION SWITCH
- Disconnect: Multifunction Switch C202.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: SJB Self-Test.
- Repeat the SJB self-test.
- Is DTC B2071 still present?
Yes
GO to N4.
No
INSTALL a new multifunction switch. CLEAR the DTCs. REPEAT the self-test.
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N4 CHECK CIRCUIT CLS32 (BN/YE) FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: SJB C2280b.
- 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. CLEAR the DTCs. REPEAT the self-test.
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N5 CHECK FOR VOLTAGE TO THE MULTIFUNCTION SWITCH
- Ignition OFF.
- Disconnect: Multifunction Switch C202.
- Measure the voltage between the multifunction switch C202-1, circuit CLS32 (BN/YE), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
INSTALL a new multifunction switch. TEST the system for normal operation.
No
GO to N6.
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N6 CHECK THE HAZARD LAMP REQUEST INPUT CIRCUIT FOR AN OPEN
- Disconnect: SJB C2280b.
- Measure the resistance between the SJB C2280b-48, circuit CLS32 (BN/YE), harness side and the multifunction switch C202-1, circuit CLS32 (BN/YE), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to N7.
No
REPAIR circuit CLS32 (BN/YE) for an open. TEST the system for normal operation.
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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. CLEAR the DTCs. REPEAT the self-test.
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