Pinpoint Test E: The Interior Courtesy Lamp(s) Are Inoperative
Interior Lighting
Pinpoint Tests
Pinpoint Test E: The Interior Courtesy Lamp(s) Are Inoperative
Refer to Wiring Diagram Set 89 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Interior Lamps for schematic and connector information. Diagrams By Number
Normal Operation
Power is supplied to the interior courtesy lamps and cargo lamp through the Smart Junction Box (SJB) fuse 9 (15A). Based on the input status from the ajar switches and the instrument panel dimmer switch, the SJB supplies voltage to the interior courtesy lamp(s).
- DTC B2A35 (Interior Lighting Output Circuit Open) - an on-demand DTC that sets when the SJB detects an open from the courtesy lighting output circuit.
- DTC B2A36 (Interior Lighting Output Circuit Short to Ground) - a continuous and on-demand DTC that sets when the SJB detects a short to ground from the courtesy lighting output circuit.
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Interior lamp
- SJB
PINPOINT TEST E: THE INTERIOR COURTESY LAMP(S) ARE INOPERATIVE
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 interior lamp switch is in the DOOR position before carrying out diagnostics.
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E1 CHECK THE OPERATION OF ALL THE COURTESY LAMPS
- Ignition OFF.
- Rotate the instrument panel dimmer switch to the DOME LAMP position and observe the interior courtesy lamps.
- Are all the interior courtesy lamps inoperative?
Yes
VERIFY the SJB fuse 9 (15A) is OK.
If OK, GO to E4. If not OK, Refer to the Wiring Diagrams to identify the possible causes of the circuit short. After the repair: Diagrams By Number
If no DTCs are present, TEST the system for normal operation.
If DTC B106E is present, CLEAR the DTCs and REPEAT the self-test (required to enable the courtesy lamp output driver if DTC B106E is present). TEST the system for normal operation.
If DTC B106F is present, INSTALL a new SJB. REFER to Multifunction Electronic Modules Service and Repair. TEST the system for normal operation.
No
GO to E2.
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E2 CHECK FOR VOLTAGE TO THE INTERIOR LAMP
- Rotate the instrument panel dimmer switch out of the DOME LAMP position.
- Disconnect: Inoperative Courtesy Lamp.
- Rotate the instrument panel dimmer switch to the DOME LAMP position.
- Measure the voltage between the inoperative courtesy lamp, harness side and ground as follows:
- Is the voltage greater than 10 volts?
Yes
GO to E3.
No
REPAIR circuit VLN33 (GY/VT) for an open. TEST the system for normal operation.
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E3 CHECK FOR VOLTAGE TO THE INTERIOR LAMP USING THE CONNECTOR GROUND
- Measure the voltage between the inoperative courtesy lamp connector, harness side as follows:
- Is the voltage greater than 10 volts?
Yes
INSTALL a new lamp in question. REFER to Interior Lamp Service and Repair. TEST the system for normal operation.
No
REPAIR circuit GD182 (BK/GY) for an open. TEST the system for normal operation.
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E4 CHECK THE OPERATION OF THE DEMAND LIGHTING
- Rotate the instrument panel dimmer switch out of the DOME LAMP position.
- Ignition ON.
- Operate the demand lighting function on any courtesy lamp.
- Does the lamp illuminate with the demand lighting function?
Yes
GO to E5.
No
REPAIR circuit GD182 (BK/GY) for an open. CLEAR the DTCs. REPEAT the self-test.
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E5 BYPASS THE SJB
- Ignition OFF.
- Disconnect: SJB C2280a.
- NOTE: If the jumper wire fails, Refer to the Wiring Diagrams to identify the possible causes of the circuit short. After the repair: Diagrams By Number
If no DTCs are present, test the system for normal operation.
If DTC B106E is present, clear the DTCs and repeat the self-test (required to enable the courtesy lamp output driver if DTC B106E is present). Test the system for normal operation.
If DTC B106F is present, install a new SJB. Refer to Multifunction Electronic Modules Service and Repair. Test the system for normal operation.
- Connect a fused jumper wire between the SJB C2280a-9, circuit VLN33 (GY/VT), harness side and battery positive.
- Do the courtesy lamps illuminate?
Yes
REMOVE the jumper wire. GO to E6.
No
REMOVE the jumper wire. REPAIR the circuit VLN33 (GY/VT) for an open. CLEAR the DTCs. REPEAT the self-test.
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E6 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. REFER to Multifunction Electronic Modules Service and Repair. 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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