Pinpoint Test A: The Courtesy Lamps Do Not Illuminate With A Door Open
Interior Lighting
Pinpoint Test A: The Courtesy Lamps Do Not Illuminate With A Door Open
Normal Operation
The Smart Junction Box (SJB) (vehicles without Intelligent Access (IA)) or the Remote Function Actuator (RFA) module (vehicles with IA (Intelligent Access)) send a voltage signal to each door ajar switch, which is routed to ground when the door is closed (the door ajar switch is closed when the door is closed). When the door is opened, the signal to ground is interrupted, indicating an open door to the SJB (Smart Junction Box) or the RFA (Remote Function Actuator) module.
For vehicles with IA (Intelligent Access), the RFA (Remote Function Actuator) module then sends a door ajar message to the SJB (Smart Junction Box) over the communication network.
When the SJB (Smart Junction Box) detects an open door, the SJB (Smart Junction Box) provides voltage to the courtesy lamps.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Door ajar switch
- SJB (Smart Junction Box)
- RFA (Remote Function Actuator) module
PINPOINT TEST A : THE COURTESY LAMPS DO NOT ILLUMINATE WITH A DOOR OPEN
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
A1 CHECK THE OPERATION OF THE COURTESY LAMPS FROM THE INSTRUMENT PANEL DIMMER SWITCH
- Ignition OFF.
- Press the instrument panel dimmer switch to the second detent up to turn the courtesy lamps on.
Do the interior courtesy lamps illuminate?
Yes
GO to A2.
No
GO to Pinpoint Test C. Pinpoint Test C: The Interior Courtesy Lamp(s) Are Inoperative
A2 CHECK THE DOOR AJAR SWITCH
- Press the instrument panel dimmer switch to the second detent down to turn the courtesy lamps off.
- Disconnect: Suspect Door Ajar Switch.
Do the courtesy lamps illuminate?
Yes
INSTALL a new door ajar switch in question. TEST the system for normal operation.
No
GO to A3.
A3 CHECK THE DOOR AJAR SWITCH INPUT CIRCUIT FOR A SHORT TO GROUND
- Disconnect: SJB (Smart Junction Box) C2280C (Vehicles Without IA (Intelligent Access)) or RFA (Remote Function Actuator) Module C2153E (Vehicles With IA (Intelligent Access)).
- Measure the resistance between the suspect door ajar switch, harness side and ground as follows:
Location Connector-Pin Circuit LH front C525-5 CPL26 (GN/VT) RH front C609-5 CPL31 (WH) LH rear C704-5 CPL36 (GN) RH rear C804-5 CPL39 (YE)
Is the resistance greater than 10,000 ohms?
Yes
For vehicles without IA (Intelligent Access), GO to A4.
For vehicles with IA (Intelligent Access), GO to A5.
No
REPAIR the circuit in question for a short to ground. TEST the system for normal operation.
A4 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.
A5 CHECK FOR CORRECT RFA (Remote Function Actuator) MODULE OPERATION
- Disconnect all the RFA (Remote Function Actuator) module connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the RFA (Remote Function Actuator) module 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 RFA (Remote Function Actuator) module. 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.