Pinpoint Test B: The Luggage Compartment Lamp Is Inoperative
Interior Lighting
Pinpoint Tests
Pinpoint Test B: The Luggage Compartment Lamp Is Inoperative
Refer to Wiring Diagram Set 89, Interior Lamps for schematic and connector information. Diagrams By Number
Normal Operation
The Smart Junction Box (SJB) monitors the trunk ajar status on circuit CPL58 (GY/OG). The trunk ajar switch is a integral part of the luggage compartment lid latch. The switch is normally closed when the luggage compartment is closed, and is open when the luggage compartment is open. The ajar switch controls the ground side of the luggage compartment lamp on circuit CLN13 (WH/BU). The luggage compartment ajar switch is grounded through circuit GD110 (BK/WH). Voltage is supplied to the luggage compartment lamp through circuit CLN09 (YE/GN).
- DTC B1331 (Decklid Ajar Rear Door Circuit Failure) - an on-demand DTC that sets when the SJB detects an open from the luggage compartment lid ajar circuit.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Luggage compartment lid latch
- Luggage compartment lamp
- SJB
PINPOINT TEST B: THE LUGGAGE COMPARTMENT LAMP IS INOPERATIVE
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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B1 CHECK THE DEMAND LAMP OPERATION
- Check the operation of the map lamps.
- Do the map lamps operate correctly?
Yes
GO to B2.
No
Go To Pinpoint Test E. Pinpoint Test E: The Courtesy Lamps Are Inoperative From The Instrument Panel Dimmer Switch
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B2 CHECK THE DECKLID AJAR PID
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: SJB DataLogger.
- Monitor the SJB luggage compartment ajar switch PID (DECKLID) while opening and closing the decklid.
- Does the decklid ajar PID agree with the decklid positions?
Yes
GO to B3.
No
GO to B6.
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B3 CHECK CIRCUIT CLN09 (YE/GN) FOR AN OPEN
- Ignition OFF.
- Open the luggage compartment lid.
- Disconnect: Luggage Compartment Lamp C428.
- Measure the voltage between the luggage compartment lamp C428-1, circuit CLN09 (YE/GN), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to B4.
No
REPAIR the circuit. TEST the system for normal operation.
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B4 CHECK CIRCUIT CLN13 (WH/BU) FOR CONTINUITY TO GROUND
- Measure the voltage between the luggage compartment lamp C428-2, circuit CLN13 (WH/BU), harness side and the luggage compartment lamp C428-1, circuit CLN09 (YE/GN).
- Is the voltage greater than 10 volts?
Yes
INSTALL a new luggage compartment lamp assembly. TEST the system for normal operation.
No
GO to B5.
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B5 CHECK CIRCUIT CLN13 (WH/BU) FOR AN OPEN
- Connect: Luggage Compartment Lamp C428.
- Disconnect: Luggage Compartment Lid Latch C430 .
- Measure the voltage between the luggage compartment lid latch C430-2, circuit CLN13 (WH/BU), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
INSTALL a new luggage compartment lid latch. TEST the system for normal operation.
No
REPAIR the circuit. TEST the system for normal operation.
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B6 CHECK CIRCUIT CPL58 (GY/OG) FOR VOLTAGE
- Ignition OFF.
- Disconnect: Luggage Compartment Lid Latch C430 .
- Measure the voltage between the luggage compartment lamp C430-1, circuit CPL58 (GY/OG), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to B8.
No
GO to B7.
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B7 CHECK CIRCUIT CPL58 (GY/OG) FOR AN OPEN
- Ignition OFF.
- Disconnect: SJB C2280c.
- Measure the resistance between the SJB C2280c-16, circuit CPL58 (GY/OG), harness side and the luggage compartment lid latch C430-1, circuit CPL58 (GY/OG), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to B9.
No
REPAIR the circuit. TEST the system for normal operation.
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B8 CHECK CIRCUIT GD110 (BK/WH) FOR AN OPEN
- Measure the voltage between the luggage compartment lid latch C430-1, circuit CPL58 (GY/OG), harness side and the luggage compartment lid latch C430-4, circuit GD110 (BK/WH), harness side.
- Is the voltage greater than 10 volts?
Yes
INSTALL a new luggage compartment lid latch. TEST the system for normal operation.
No
REPAIR circuit GD110 (BK/WH) for an open. TEST the system for normal operation.
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B9 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. TEST the system for normal operation.
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