Pinpoint Test A: The Courtesy Lamps Do Not Turn On With A Door Open
Interior Lighting
Pinpoint Tests
Pinpoint Test A: The Courtesy Lamps Do Not Turn On With A Door Open
Refer to Wiring Diagram Set 71 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Cluster and Panel Illumination for schematic and connector information. Diagrams By Number
Refer to Wiring Diagram Set 117 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Remote Keyless Entry and Alarm for schematic and connector information. Diagrams By Number
Normal Operation
The Smart Junction Box (SJB) sends a voltage signal to the door ajar switches through circuits CPL26 (GN/VT) (LH front door), CPL31 (WH) (RH front door), CPL36 (GN) (LH rear door) and CPL39 (YE) (RH rear door). Ground is provided to the door ajar switches through circuit GD182 (BK/GY). The door ajar switch is closed with the door closed. When the door is opened, the signal to ground is interrupted indicating an open door to the SJB.
The SJB also sends a voltage signal to the instrument panel dimmer switch through circuit CLN27 (WH/BN) to monitor the dome defeat input request. When the instrument panel dimmer switch is in the DOME DEFEAT position, the signal is routed to ground indicating a request for the dome defeat feature.
When any door is opened, a correct unlock code from the keyless entry keypad or an unlock request from a programmed Remote Keyless Entry (RKE) transmitter is detected, the SJB provides voltage to the courtesy lamps unless the dome defeat from the instrument panel dimmer switch is detected.
- DTC B213A (Digital Dimmer Switch Input Circuit Failure) - a continuous and on-demand DTC that may set when the SJB detects multiple input requests from the instrument panel dimmer switch.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Door ajar switch (integrated into the door latch)
- Instrument panel dimmer switch
- SJB
PINPOINT TEST A: THE COURTESY LAMPS DO NOT TURN ON 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.
NOTE: Make sure the instrument panel dimmer switch is not in the DOME DEFEAT position before continuing diagnostics.
NOTE: Make sure the interior lamp switch is in the DOOR position before carrying out diagnostics.
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A1 CHECK THE COURTESY LAMP OPERATION FROM THE INSTRUMENT PANEL DIMMER SWITCH
- Ignition OFF.
- Rotate the instrument panel dimmer switch to the DOME LAMP position.
- Do the courtesy lamps illuminate?
Yes
GO to A2.
No
Go To Pinpoint Test E. Pinpoint Test E: The Interior Courtesy Lamp(s) Are Inoperative
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A2 CHECK THE INSTRUMENT PANEL DIMMER SWITCH PID
- Rotate the instrument panel dimmer switch out of the DOME LAMP position.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: SJB DataLogger.
- NOTE: The DOME_DEF PID should indicate All if the switch is in the DOME DEFEAT position and Undefined if it is not.
- Monitor the SJB instrument panel dimmer switch PID (DOME_DEF).
- Does the PID indicate Undefined?
Yes
GO to A5.
No
GO to A3.
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A3 CHECK THE INSTRUMENT PANEL DIMMER SWITCH
- Disconnect: Instrument Panel Dimmer Switch C2065.
- Enter the following diagnostic mode on the scan tool: SJB DataLogger.
- Monitor the SJB instrument panel dimmer switch PID (DOME_DEF).
- Does the PID indicate Undefined?
Yes
INSTALL a new instrument panel dimmer switch. TEST the system for normal operation.
No
GO to A4.
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A4 CHECK THE DOME DEFEAT INPUT CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: SJB C2280b.
- Measure the resistance between the instrument panel dimmer switch C2065-2, circuit CLN27 (WH/BN), harness side and ground.
- Is the resistance greater than 10,000 ohms?
Yes
GO to A8.
No
REPAIR circuit CLN27 (WH/BN) for a short to ground. TEST the system for normal operation.
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A5 CHECK THE DOOR AJAR PIDs
- Enter the following diagnostic mode on the scan tool: SJB DataLogger.
- Monitor the SJB door ajar switch PIDs (D_DR_SW, P_DR_SW, LRDR_SW, and RRDR_SW) while opening and closing all the doors.
- Do all the door ajar switch PID values agree with the door positions?
Yes
GO to A8.
No
GO to A6.
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A6 CHECK THE DOOR AJAR SWITCH OPERATION
- Ignition 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 A7.
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A7 CHECK THE DOOR AJAR SWITCH INPUT CIRCUIT FOR A SHORT TO GROUND
- Disconnect: SJB C2280c.
- Measure the resistance between the suspect door ajar switch, harness side and ground as follows:
- Is the resistance greater than 10,000 ohms?
Yes
GO to A8.
No
REPAIR the input circuit in question. TEST the system for normal operation.
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A8 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.
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