Pinpoint Test Q: One Or More Parking, Rear Or License Plate Lamps Is Inoperative
Parking, Rear and License Plate Lamps
Pinpoint Test Q: One Or More Parking, Rear or License Plate Lamps Is Inoperative
Refer to Wiring Diagram Set 92, Parking, Rear and License Lamps for schematic and connector information [1][2]Diagrams By Number.
Normal Operation
When the headlamp switch is placed in the PARKING LAMPS ON position, the Smart Junction Box (SJB) energizes the parking lamp relay coil (integrated into the SJB (Smart Junction Box)). When the parking lamp relay is energized, voltage is routed to the rear and front parking lamps.
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Bulb holder
- LED lamp
- Rear lamp jumper harness
- SJB (Smart Junction Box)
PINPOINT TEST Q : ONE OR MORE PARKING, REAR OR LICENSE PLATE LAMPS IS INOPERATIVE
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
Q1 DETERMINE IF ALL THE PARKING LAMPS ARE INOPERATIVE
- Ignition OFF.
- Place the headlamp switch in the PARKING LAMPS ON position.
Are all the parking lamps inoperative?
Yes
PLACE the headlamp switch in the OFF position. VERIFY the SJB (Smart Junction Box) fuse 22 (15A) is OK. If OK, GO to Q6. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short [1][2]Diagrams By Number.
No
If all the front parking lamps are inoperative, GO to Q2.
If all the rear parking and license plate lamps are inoperative, GO to Q3.
For all others, GO to Q4.
Q2 CHECK THE SJB (Smart Junction Box) PARKING LAMP OUTPUT CIRCUIT FOR AN OPEN (FRONT LAMPS)
- Disconnect: SJB (Smart Junction Box) C2280E.
- Connect a fused jumper wire between the SJB (Smart Junction Box) C2280E-1, circuit CE612 (GY/VT), harness side and the SJB (Smart Junction Box) C2280E-6, circuit CLS30 (VT/WH), harness side.
- Ignition ON.
Do the front parking lamps illuminate?
Yes
REMOVE the jumper wire. GO to Q7.
No
REMOVE the jumper wire. REPAIR circuit CLS30 (VT/WH) for an open. TEST the system for normal operation.
Q3 CHECK THE SJB (Smart Junction Box) PARKING LAMP OUTPUT CIRCUIT FOR AN OPEN (REAR LAMPS)
- Disconnect: SJB (Smart Junction Box) C2280D.
- Connect a fused jumper wire between the positive battery terminal and the SJB (Smart Junction Box) C2280D-20, circuit CLS30 (VT/WH), harness side.
Do the rear parking lamps illuminate?
Yes
REMOVE the jumper wire. GO to Q7.
No
REMOVE the jumper wire. REPAIR circuit CLS30 (VT/WH) for an open. TEST the system for normal operation.
Q4 CHECK FOR VOLTAGE TO THE INOPERATIVE LAMP
- Disconnect: Inoperative Lamp.
- Place the headlamp switch in the PARKING LAMPS ON position.
- Measure the voltage between the inoperative lamp, harness side and ground as follows:
Inoperative Lamp Connector-Pin Circuit LH front C1023-2 CLS30 (VT/WH) RH front C1043-2 CLS30 (VT/WH) LH front side marker C151-1 CLS30 (VT/WH) RH front side marker C161-1 CLS30 (VT/WH) LH rear side marker C481-1 CLS30 (VT/WH) RH rear side marker C482-1 CLS30 (VT/WH) LH license plate C4046B-2 CLS30 (VT/WH) RH license plate C4046A-2 CLS30 (VT/WH) LH rear lamp C498-2 CLS30 (VT/WH) RH rear lamp C499-2 CLS30 (VT/WH)
Is the voltage greater than 10 volts?
Yes
GO to Q5.
No
REPAIR circuit CLS30 (VT/WH) for an open. TEST the system for normal operation.
Q5 CHECK THE VOLTAGE TO THE INOPERATIVE LAMP USING THE CONNECTOR GROUND
- Measure the voltage between the inoperative lamp connector, harness side as follows:
Inoperative Lamp Connector-Pin/ Circuit Connector-Pin/ Circuit LH front C1023-1 CLS30 (VT/WH) C1023-2 GD129 (BK/YE) RH front C1043-1 CLS30 (VT/WH) C1043-2 GD129 (BK/YE) LH front side marker C151-1 CLS30 (VT/WH) C151-2 GD129 (BK/YE) RH front side marker C161-1 CLS30 (VT/WH) C161-2 GD129 (BK/YE) LH rear side marker C481-1 CLS30 (VT/WH) C481-2 GD110 (BK/YE) RH rear side marker C482-1 CLS30 (VT/WH) C482-2 GD110 (BK/YE) LH license plate C4046B-1 CLS30 (VT/WH) C4046B-2 GD110 (BK/YE) RH license plate C4046A-1 CLS30 (VT/WH) C4046A-2 GD110 (BK/YE) LH rear lamp C498-2CLS30 (VT/WH) C498-6 GD109 (BK) RH rear lamp C499-2 CLS30 (VT/WH) C499-6 GD110 (BK/WH)
Is the voltage greater than 10 volts?
Yes
For any front, side marker or license plate lamp, INSTALL a new bulb holder. TEST the system for normal operation.
For a rear lamp, GO to Q6.
No
REPAIR the ground circuit in question for an open. TEST the system for normal operation.
Q6 CHECK THE REAR LAMP JUMPER HARNESS
- Place the headlamp switch in the OFF position.
- Inspect the rear lamp jumper harness for opens.
Is the rear lamp jumper harness OK?
Yes
INSTALL a new LED lamp. TEST the system for normal operation.
No
REPAIR or INSTALL a new rear lamp jumper harness. TEST the system for normal operation.
Q7 CHECK FOR CORRECT SJB (Smart Junction Box) OPERATION
- Disconnect all the SJB (Smart Junction Box) connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the SJB (Smart Junction Box) 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 (Smart Junction Box). 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.