Pinpoint Test O: The Parking, Rear Or License Plate Lamps Are On Continuously
Parking, Rear and License Plate Lamps
Pinpoint Tests
Pinpoint Test O: The Parking, Rear Or License Plate Lamps Are On Continuously
Refer to Wiring Diagram Set 92, Parking Rear and License Lamps for schematic and connector information. Diagrams By Number
Normal Operation
The Smart Junction Box (SJB) sends a voltage reference signal to the headlamp switch through circuit 1401 (BK/LG). When the headlamp switch is placed in the PARKING LAMPS ON position, the SJB provides voltage to the parking, license plate and side marker lamps.
B1470-B2523:
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Headlamp switch
- BEC
- SJB
PINPOINT TEST O: THE PARKING, REAR OR LICENSE PLATE LAMPS ARE ON CONTINUOUSLY
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
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O1 USE THE RECORDED DTCs FROM THE SJB SELF-TEST
- Ignition OFF.
- Retrieve the recorded results from the SJB self-test.
- Was DTC B1470 present?
Yes
GO to O2.
No
GO to O4.
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O2 CHECK THE HEADLAMP SWITCH
- Disconnect: Headlamp Switch C205.
- Carry out the headlamp switch component test.
- Is the headlamp switch OK?
Yes
GO to O3.
No
INSTALL a new headlamp switch. REFER to Headlamp Switch Service and Repair. CLEAR the DTCs. REPEAT the self-test.
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O3 CHECK CIRCUIT 1401 (BK/LG) FOR A SHORT TO GROUND
- Disconnect: SJB C2280b.
- Measure the resistance between the headlamp switch C205-5, circuit 1401 (BK/LG), harness side and ground.
- Is the resistance greater than 10,000 ohms?
Yes
GO to O7.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
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O4 CHECK THE PARKING LAMP VOLTAGE SUPPLY CIRCUITS FOR A SHORT TO VOLTAGE
- Disconnect: SJB C2280d.
- Ignition ON.
- Does any parking lamp continue to illuminate?
Yes
If a front side marker or front lamp continues to illuminate, GO to O5.
For all other lamps, REPAIR the voltage supply circuit in question. CLEAR the DTCs. REPEAT the self-test.
No
GO to O7.
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O5 CHECK THE PARKING LAMP VOLTAGE SUPPLY CIRCUITS FOR A SHORT TO VOLTAGE (SJB TO BEC)
- Ignition OFF.
- Disconnect: BEC C1035a.
- Ignition ON.
- Does any parking lamp continue to illuminate?
Yes
GO to O6.
No
REPAIR the voltage supply circuit in question between the SJB and the BEC. CLEAR the DTCs. REPEAT the self-test.
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O6 CHECK THE PARKING LAMP VOLTAGE SUPPLY CIRCUITS FOR A SHORT TO VOLTAGE (BEC to LAMP)
- Ignition OFF.
- Disconnect: BEC C1035c.
- Disconnect: Suspect Parking Lamp.
- Ignition ON.
- Measure the voltage between suspect parking lamp, harness side and ground as follows:
- Is any voltage present?
Yes
REPAIR the voltage supply circuit in question. CLEAR the DTCs. REPEAT the self-test.
No
INSTALL a new BEC. CLEAR the DTCs. REPEAT the self-test.
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O7 CHECK FOR CORRECT SJB OPERATION
- Ignition OFF.
- 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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