Interior Lighting System: Diagnosis Ford Explorer V

Related Module DTC Chart(s)

This table contains references to module DTC charts which are related to this system.

Symptom Chart: Interior Lighting

Diagnostics in this service information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to DIAGNOSTIC METHODS for information regarding Ford-specific diagnostic practices.

SYMPTOM CHART

Visual Inspection and Diagnostic Pre-checks

1. Inspect the door for correct latching.

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1. CHECK THE OPERATION OF THE COURTESY LAMPS FROM THE FLM NOTE: Make sure that the dark car feature is not enabled in the BCM. The dark car feature disables activation of courtesy lamps due to a door unlock, door ajar or removing the key from the ignition cylinder. The feature can be disabled using a scan tool. NOTE: Make sure all the doors are closed. Ignition OFF. Turn the courtesy lamps on by pressing the courtesy lamp switch on the FLM for approximately 3 seconds. Do the interior courtesy lamps illuminate? Yes: GO to 2 . No: REFER to «Diagnostic Routine F: One Or More Interior Courtesy Lamps Are Inoperative»(ref-517595-S33213970702012121200000) .
2. CHECK THE DOOR AJAR SWITCH OPERATION Turn the courtesy lamps off by pressing the courtesy lamp switch for approximately 3 seconds. Disconnect: Suspect Door Latch. Do the courtesy lamps illuminate? Yes: INSTALL a new door latch for the latch in question. REFER to «FRONT DOOR LATCH»(ref-517600-S31525403652012121200000) , or REFER to «REAR DOOR LATCH»(ref-517600-S40666778172012121200000) . No: GO to 3 .
3. CHECK THE DOOR AJAR SWITCH INPUT CIRCUIT FOR A SHORT TO GROUND Disconnect: BCM C2280C. Measure: Door Latch Ground Suspect Door Ajar Switch Ground Connector-Pin Circuit Measurement / Action Pin Circuit Left front C525-5 CPL26 (GN/VT) - - Right front C609-5 CPL31 (WH) - - Left rear C705-5 CPL36 (GN) - - Right rear C805-5 CPL39 (YE) - - Is the resistance greater than 10, 000 ohms? Yes: GO to 4 . No: REPAIR the circuit.
4. CHECK FOR CORRECT BCM OPERATION Disconnect the BCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) corrosion (install new connector or terminals - clean module pins) pushed-out pins - install new pins as necessary Reconnect the BCM connectors and make sure they seat and latch correctly. Operate the system and determine if the concern is still present. Is the concern still present? Yes: CHECK OASIS for any applicable TSBs . If a TSB exists for this concern, discontinue this test and follow TSB instructions. If no TSBs address this concern, INSTALL a new BCM. REFER to «BODY CONTROL MODULE (BCM) - WITH INTELLIGENT ACCESS (IA)»(ref-517607-S22029955872012121200000) , or REFER to «BODY CONTROL MODULE (BCM) - WITHOUT INTELLIGENT ACCESS (IA)»(ref-517607-S10277508012012121200000) . No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. CLEAR the DTCs .

1. Inspect the door for correct latching.

DTC FAULT TRIGGER CONDITIONS

1. Inspect the liftgate for correct latching.

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1. CHECK THE COURTESY LAMP OPERATION FROM ANY DOOR NOTE: Make sure that the dark car feature is not enabled in the BCM. The dark car feature disables activation of courtesy lamps due to a door unlock, door ajar or removing the key from the ignition cylinder. The feature can be disabled using a scan tool. Ignition OFF. Open any door and observe the courtesy lamps. Do the courtesy lamps illuminate? Yes: GO to 2 . No: REFER to «Diagnostic Routine A: The Courtesy Lamps Do Not Illuminate With a Door Open»(ref-517595-S29355523542012121200000) .
2. CHECK THE LTM OR THE LIFTGATE LATCH Disconnect: Liftgate Latch C4174B. Do the courtesy lamps illuminate? Yes: GO to 4 . No: GO to 3 .
3. CHECK THE LIFTGATE AJAR INPUT CIRCUIT FOR A SHORT TO GROUND Disconnect: BCM C2280C. Measure: BCM Ground C2280C Ground Pin Circuit Measurement / Action Pin Circuit 19 CPL58 (GY/OG) - - Is the resistance greater than 10, 000 ohms? Yes: GO to 5 . No: REPAIR the circuit.
4. CHECK FOR CORRECT LTM OPERATION Disconnect the LTM connectors. Repair: corrosion (install new connector or terminals - clean module pins) corrosion (install new connector or terminals - clean module pins) pushed-out pins - install new pins as necessary Reconnect the LTM connectors and make sure they seat and latch correctly. Operate the system and determine if the concern is still present. Is the concern still present? Yes: CHECK OASIS for any applicable TSBs . If a TSB exists for this concern, discontinue this test and follow TSB instructions. If no TSBs address this concern, INSTALL a new LTM. REFER to «LIFTGATE/TRUNK MODULE (LTM)»(ref-517610-S39815224242012121200000) . No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. CLEAR the DTCs .
5. CHECK FOR CORRECT BCM OPERATION Disconnect the BCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) corrosion (install new connector or terminals - clean module pins) pushed-out pins - install new pins as necessary Reconnect the BCM connectors and make sure they seat and latch correctly. Operate the system and determine if the concern is still present. Is the concern still present? Yes: CHECK OASIS for any applicable TSBs . If a TSB exists for this concern, discontinue this test and follow TSB instructions. If no TSBs address this concern, INSTALL a new BCM. REFER to «BODY CONTROL MODULE (BCM) - WITH INTELLIGENT ACCESS (IA)»(ref-517607-S22029955872012121200000) , or REFER to «BODY CONTROL MODULE (BCM) - WITHOUT INTELLIGENT ACCESS (IA)»(ref-517607-S10277508012012121200000) . No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. CLEAR the DTCs .

1. Inspect the bulbs and make sure they are OK.
2. Inspect the BCM fuse 12 (15A).
3. Inspect the interior lamp for damage.

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1. CHECK THE OPERATION OF ALL THE INTERIOR COURTESY LAMPS Press and hold the courtesy lamp switch for 3 seconds. Are all the interior courtesy lamps inoperative? Yes: VERIFY the BCM fuse 12 (15A) is OK. If OK, GO to 4 . No: GO to 2 .
2. CHECK FOR VOLTAGE TO THE COURTESY LAMP Press and hold the courtesy lamp switch to turn the interior courtesy lamps off. Disconnect: Inoperative Interior Lamp. Press and hold the courtesy lamp switch for 3 seconds. For a front interior lamp (overhead console), measure: Front Interior Lamp (Overhead Console) Ground C930 Ground Pin Circuit Measurement / Action Pin Circuit 2 VLN33 (GY/VT) - - For a rear interior lamp (with roof opening panel), measure: Interior Lamp Ground Inoperative Left/Right Rear Lamp (With Roof Opening Panel) Ground Connector-Pin Circuit Measurement / Action Pin Circuit C941-1 VLN33 (GY/VT) - - C942-1 VLN33 (GY/VT) - - For a rear interior lamp (without roof opening panel) or cargo lamp, measure: Interior Lamp Ground Inoperative Rear Lamp (Without Roof Opening Panel) or Cargo Lamp Ground Connector-Pin Circuit Measurement / Action Pin Circuit C926-2 VLN33 (GY/VT) - - C981-2 VLN33 (GY/VT) - - Is the voltage greater than 11 volts? Yes: GO to 3 . No: REPAIR the courtesy lamp voltage supply circuit for an open.
3. CHECK THE COURTESY LAMP GROUND CIRCUIT FOR AN OPEN For a front interior lamp (overhead console), measure: Front Interior Lamp (Overhead Console) Front Interior Lamp (Overhead Console) C930 C930 Pin Circuit Measurement / Action Pin Circuit 2 VLN33 (GY/VT) 1 GD233 (BK) For a rear interior lamp (with roof opening panel), measure: Interior Lamp Interior Lamp Inoperative Left/Right Rear Lamp (With Roof Opening Panel) Inoperative Left/Right Rear Lamp (With Roof Opening Panel) Connector-Pin Circuit Measurement / Action Connector-Pin Circuit C941-1 VLN33 (GY/VT) C941-2 GD233 (BK) C942-1 VLN33 (GY/VT) C942-2 GD233 (BK) For a rear interior lamp (without roof opening panel) or cargo lamp, measure: Interior Lamp Interior Lamp Inoperative Rear Lamp (Without Roof Opening Panel) or Cargo Lamp Inoperative Rear Lamp (Without Roof Opening Panel) or Cargo Lamp Connector-Pin Circuit Measurement / Action Connector-Pin Circuit C926-2 VLN33 (GY/VT) C926-3 GD233 (BK) C981-2 VLN33 (GY/VT) C981-3 GD233 (BK) Is the voltage greater than 11 volts? Yes: INSTALL a new interior lamp for the lamp in question. REFER to «Interior Lamp - First Row»(ref-517595-S38868510122012121200000) , REFER to «Interior Lamp - Second Row With Moon Roof»(ref-517595-S09486689632012121200000) , or REFER to «Interior Lamp - Second Row Without Moon Roof, Third Row»(ref-517595-S07509088882012121200000) . No: REPAIR the circuit.
4. CHECK THE OPERATION OF THE DEMAND LAMPS Activate the map lamp function from all of the interior lamps. Do the map lamps illuminate? Yes: GO to 5 . No: REPAIR the interior lamp ground circuit for an open.
5. BYPASS THE BCM Turn the map lamps off. Disconnect: BCM C2280A. NOTE: If the jumper wire fails, REFER to the appropriate wiring diagrams to identify the possible causes of the circuit short. REFER to «OEM FUSE AND RELAY INFORMATION»(ref-485835) and «OEM WIRING DIAGRAMS»(ref-514995) . After the repair: If no DTCs are present, test the system for normal operation. If DTC U1000:00 is present, clear the DTCs and repeat the self-test (required to enable the courtesy lamp output driver if DTC U1000:00 is present). Test the system for normal operation. If DTC U3000:49 is present, install a new BCM. REFER to «BODY CONTROL MODULE (BCM) - WITHOUT INTELLIGENT ACCESS (IA)»(ref-517607-S10277508012012121200000) , or REFER to «BODY CONTROL MODULE (BCM) - WITH INTELLIGENT ACCESS (IA)»(ref-517607-S22029955872012121200000) . Test the system for normal operation. Connect: BCM Battery C2280A Battery Positive Pin Circuit Measurement / Action Pin Circuit 1 VLN33 (GY/VT) - - Do the courtesy lamps illuminate? Yes: REMOVE the jumper wire. GO to 5 . No: REMOVE the jumper wire. REPAIR the courtesy lamp voltage supply circuit for an open.
6. CHECK FOR CORRECT BCM OPERATION Disconnect the BCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) corrosion (install new connector or terminals - clean module pins) pushed-out pins - install new pins as necessary Reconnect the BCM connectors and make sure they seat and latch correctly. Operate the system and determine if the concern is still present. Is the concern still present? Yes: CHECK OASIS for any applicable TSBs . If a TSB exists for this concern, discontinue this test and follow TSB instructions. If no TSBs address this concern, INSTALL a new BCM. REFER to «BODY CONTROL MODULE (BCM) - WITH INTELLIGENT ACCESS (IA)»(ref-517607-S22029955872012121200000) , or REFER to «BODY CONTROL MODULE (BCM) - WITHOUT INTELLIGENT ACCESS (IA)»(ref-517607-S10277508012012121200000) . No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. CLEAR the DTCs .

1. Inspect the bulbs and make sure they are OK.
2. Inspect the exterior mirror for damage.

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1. DETERMINE IF BOTH PUDDLE LAMPS ARE INOPERATIVE Ignition OFF. Press and hold the courtesy lamp switch for 3 seconds. Are both puddle lamps inoperative? Yes: GO to 2 . No: GO to 3 .
2. BYPASS THE BCM Press and hold the courtesy lamp switch to turn the interior courtesy lamps off. Disconnect: BCM C2280C. NOTE: If the jumper wire fails, REFER to the appropriate wiring diagrams to identify the possible causes of the circuit short. REFER to «OEM FUSE AND RELAY INFORMATION»(ref-485835) and «OEM WIRING DIAGRAMS»(ref-514995) . After the repair: If no DTCs are present, test the system for normal operation. If DTC U1000:00 is present, clear the DTCs and repeat the self-test (required to enable the courtesy lamp output driver if DTC U1000:00 is present). Test the system for normal operation. If DTC U3000:49 is present, install a new BCM. REFER to «BODY CONTROL MODULE (BCM) - WITHOUT INTELLIGENT ACCESS (IA)»(ref-517607-S10277508012012121200000) , or REFER to «BODY CONTROL MODULE (BCM) - WITH INTELLIGENT ACCESS (IA)»(ref-517607-S22029955872012121200000) . Test the system for normal operation. Connect: BCM Battery C2280C Battery Positive Pin Circuit Measurement / Action Pin Circuit 1 CLN25 (VT) - - Do the puddle lamps illuminate? Yes: REMOVE the jumper wire. GO to 5 . No: REMOVE the jumper wire. REPAIR the puddle lamp voltage supply circuit for an open.
3. CHECK FOR VOLTAGE TO THE PUDDLE LAMP Press and hold the courtesy lamp switch to turn the interior courtesy lamps off. Disconnect: Inoperative Exterior Mirror. Press and hold the courtesy lamp switch for 3 seconds. Measure: Exterior Mirror Ground Inoperative Puddle Lamp Ground Connector-Pin Circuit Measurement / Action Pin Circuit Left Mirror C516-5 CLN25 (VT) - - Right Mirror C601-5 CLN25 (VT) - - Is the voltage greater than 11 volts? Yes: GO to 4 . No: REPAIR the puddle lamp voltage supply circuit for an open.
4. CHECK THE PUDDLE LAMP GROUND CIRCUIT FOR AN OPEN Measure: Exterior Mirror Exterior Mirror Inoperative Puddle Lamp Inoperative Puddle Lamp Connector-Pin Circuit Measurement / Action Connector-Pin Circuit Left Mirror C516-5 CLN25 (VT) Left Mirror C516-8 GD233 (BK) Right Mirror C601-5 CLN25 (VT) Right Mirror C601-8 GD348 (BK/YE) Is the voltage greater than 11 volts? Yes: INSTALL a new exterior mirror for the mirror in question. REFER to «EXTERIOR MIRROR»(ref-517613-S13969929342012121200000) . No: REPAIR ground circuit in question.
5. CHECK FOR CORRECT BCM OPERATION Disconnect the BCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) corrosion (install new connector or terminals - clean module pins) pushed-out pins - install new pins as necessary Reconnect the BCM connectors and make sure they seat and latch correctly. Operate the system and determine if the concern is still present. Is the concern still present? Yes: CHECK OASIS for any applicable TSBs . If a TSB exists for this concern, discontinue this test and follow TSB instructions. If no TSBs address this concern, INSTALL a new BCM. REFER to «BODY CONTROL MODULE (BCM) - WITH INTELLIGENT ACCESS (IA)»(ref-517607-S22029955872012121200000) , or REFER to «BODY CONTROL MODULE (BCM) - WITHOUT INTELLIGENT ACCESS (IA)»(ref-517607-S10277508012012121200000) . No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. CLEAR the DTCs .

1. Inspect the doors for correct latching.
2. Inspect the liftgate for correct latching.

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1. CHECK THE DOOR AJAR SWITCH PIDs Ignition ON. Using a scan tool, view BCM PIDs . Monitor the BCM DOOR_SW_DRVR, DOOR_SW_PSGR, DOOR_SW_LR, DOOR_SW_RR PIDs while opening and closing all the doors. Do all the door ajar switch PID values agree with the door positions? Yes: GO to 5 . No: GO to 2 .
2. BYPASS THE SUSPECT DOOR LATCH Disconnect: Suspect Door Latch. Connect: Door Latch Door Latch Suspect Door Ajar Switch Suspect Door Ajar Switch Connector-Pin Circuit Measurement / Action Pin Circuit Left front C525-5 CPL26 (GN/VT) Left front C525-6 GD233 (BK) Right front C609-5 CPL31 (WH) Right front C609-6 GD348 (BK/YE) Left rear C705-5 CPL36 (GN) Left rear C705-6 GD349 (BK/GY) Right rear C805-5 CPL39 (YE) Right rear C805-6 GD348 (BK/YE) Using a scan tool, view BCM PIDs . Monitor the suspect BCM DOOR_SW_DRVR, DOOR_SW_PSGR, DOOR_SW_LR, DOOR_SW_RR PID. Does the PID indicate the door is closed? Yes: REMOVE the jumper wire. INSTALL a new door latch for the latch in question. REFER to «FRONT DOOR LATCH»(ref-517600-S31525403652012121200000) , or REFER to «REAR DOOR LATCH»(ref-517600-S40666778172012121200000) . No: REMOVE the jumper wire. GO to 3 .
3. BYPASS THE DOOR LATCH GROUND CIRCUIT Connect: Door Latch Ground Suspect Door Ajar Switch Ground Connector-Pin Circuit Measurement / Action Pin Circuit Left front C525-5 CPL26 (GN/VT) - - Right front C609-5 CPL31 (WH) - - Left rear C705-5 CPL36 (GN) - - Right rear C805-5 CPL39 (YE) - - Monitor the BCM DOOR_SW_DRVR, DOOR_SW_PSGR, DOOR_SW_LR, DOOR_SW_RR PID. Does the PID indicate the door is closed? Yes: REMOVE the jumper wire. REPAIR door latch ground circuit in question for an open. No: REMOVE the jumper wire. GO to 4 .
4. CHECK THE SUSPECT DOOR AJAR SWITCH INPUT CIRCUIT FOR AN OPEN Disconnect: BCM C2280C. Measure: Door Latch BCM Suspect Door Ajar Switch C2280C Connector-Pin Circuit Measurement / Action Pin Circuit Left front C525-5 CPL26 (GN/VT) 9 CPL26 (GN/VT) Right front C609-5 CPL31 (WH) 5 CPL31 (WH) Left rear C705-5 CPL36 (GN) 20 CPL36 (GN) Right rear C805-5 CPL39 (YE) 21 CPL39 (YE) Is the resistance less than 3 ohms? Yes: GO to 12 . No: REPAIR the door ajar input circuit in question.
5. CHECK THE LIFTGATE AJAR SWITCH PID Monitor the BCM DOOR_SW_LUGG PID while opening and closing the liftgate. Does the liftgate switch PID value agree with the liftgate positions? Yes: If the interior courtesy lamps are illuminated, REFER to «Diagnostic Routine K: The Interior Courtesy Lamps Stay On Continuously»(ref-517595-S42651645172012121200000) . If the puddle lamps are illuminated, REFER to «Diagnostic Routine L: The Puddle Lamps Stay On Continuously»(ref-517595-S16465133842012121200000) . No: GO to 8 .
6. BYPASS THE LIFTGATE LATCH Ignition OFF. Disconnect: Liftgate Latch. Ignition ON. Monitor the BCM DOOR_SW_LUGG PID. NOTE: If the fuse fails, repair the liftgate ajar input circuit for a short to voltage. Connect: Liftgate Ajar Switch Liftgate Ajar Switch C457 C457 Pin Circuit Measurement / Action Pin Circuit 4 CPL58 (GY/OG) 3 GD349 (BK/GY) Does the PID indicate the liftgate is closed? Yes: REMOVE the jumper wire. INSTALL a new liftgate latch. REFER to «LIFTGATE LATCH - With IA»(ref-517619-S39873180922012121200000) . No: REMOVE the jumper wire. GO to 7 .
7. CHECK THE LIFTGATE AJAR SWITCH GROUND CIRCUIT FOR AN OPEN Connect: Liftgate Ajar Switch Ground C457 Ground Pin Circuit Measurement / Action Pin Circuit 4 CPL58 (GY/OG) - - Monitor the BCM DOOR_SW_LUGG PID. Does the PID indicate the liftgate is closed? Yes: REMOVE the jumper wire. REPAIR the circuit. No: LEAVE the jumper wire connected. GO to 8 .
8. CHECK FOR LTM DTCs FROM THE SELF-TEST Using a scan tool, perform LTM self-test. Are any DTCs other than DTC B2718 or DTC B2721 present? Yes: REFER to «DTC CHART: LIFTGATE OR TRUNK MODULE (LTM)»(ref-517610-S34220823122012121200000) . No: GO to 9 .
9. BYPASS THE LTM Ignition OFF. Disconnect: LTM C4174B. Ignition ON. NOTE: If the fuse fails, repair the liftgate ajar input circuit for a short to voltage. Connect: LTM Ground C4174B Ground Pin Circuit Measurement / Action Pin Circuit 15 CPL58 (GY/OG) - - Monitor the BCM DOOR_SW_LUGG PID. Does the PID indicate the liftgate is closed? Yes: REMOVE the jumper wire. GO to 11 . No: LEAVE the jumper wire connected. GO to 10 .
10. CHECK THE LIFTGATE AJAR INPUT CIRCUIT FOR AN OPEN Ignition OFF. Disconnect: BCM C2280C. Measure: BCM Ground C2280C Ground Pin Circuit Measurement / Action Pin Circuit 19 CPL58 (GY/OG) - - Is the resistance less than 3 ohms? Yes: REMOVE the jumper wire. GO to 12 . No: REMOVE the jumper wire. REPAIR the circuit.
11. CHECK FOR CORRECT LTM OPERATION Disconnect the LTM connectors. Repair: corrosion (install new connector or terminals - clean module pins) corrosion (install new connector or terminals - clean module pins) pushed-out pins - install new pins as necessary Reconnect the LTM connectors and make sure they seat and latch correctly. Operate the system and determine if the concern is still present. Is the concern still present? Yes: CHECK OASIS for any applicable TSBs . If a TSB exists for this concern, discontinue this test and follow TSB instructions. If no TSBs address this concern, INSTALL a new LTM. REFER to «LIFTGATE/TRUNK MODULE (LTM)»(ref-517610-S39815224242012121200000) . No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. CLEAR the DTCs .
12. CHECK FOR CORRECT BCM OPERATION Disconnect the BCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) corrosion (install new connector or terminals - clean module pins) pushed-out pins - install new pins as necessary Reconnect the BCM connectors and make sure they seat and latch correctly. Operate the system and determine if the concern is still present. Is the concern still present? Yes: CHECK OASIS for any applicable TSBs . If a TSB exists for this concern, discontinue this test and follow TSB instructions. If no TSBs address this concern, INSTALL a new BCM. REFER to «BODY CONTROL MODULE (BCM) - WITH INTELLIGENT ACCESS (IA)»(ref-517607-S22029955872012121200000) , or REFER to «BODY CONTROL MODULE (BCM) - WITHOUT INTELLIGENT ACCESS (IA)»(ref-517607-S10277508012012121200000) . No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. CLEAR the DTCs .

1. Inspect the interior lamps and make sure the map lamps are not on.

Pinpoint Test

1. CHECK THE DOOR AND LIFTGATE AJAR SWITCH PIDs Ignition ON. Using a scan tool, view BCM PIDs . Monitor the BCM DOOR_SW_DRVR, DOOR_SW_PSGR, DOOR_SW_LR, DOOR_SW_RR, DOOR_SW_LUGG PIDs while opening and closing all the doors. Do all the door and liftgate ajar switch PID values agree with the door and liftgate positions? Yes: GO to 2 . No: REFER to «Diagnostic Routine J: All The Courtesy Lamps Stay On Continuously»(ref-517595-S41690637212012121200000) .
2. CHECK THE INTERIOR COURTESY LAMP OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE Ignition OFF. Disconnect: BCM C2280A. Ignition ON. Do the interior courtesy lamps continue to illuminate? Yes: REPAIR the circuit. No: GO to 3 .
3. CHECK FOR CORRECT BCM OPERATION Disconnect the BCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) corrosion (install new connector or terminals - clean module pins) pushed-out pins - install new pins as necessary Reconnect the BCM connectors and make sure they seat and latch correctly. Operate the system and determine if the concern is still present. Is the concern still present? Yes: CHECK OASIS for any applicable TSBs . If a TSB exists for this concern, discontinue this test and follow TSB instructions. If no TSBs address this concern, INSTALL a new BCM. REFER to «BODY CONTROL MODULE (BCM) - WITH INTELLIGENT ACCESS (IA)»(ref-517607-S22029955872012121200000) , or REFER to «BODY CONTROL MODULE (BCM) - WITHOUT INTELLIGENT ACCESS (IA)»(ref-517607-S10277508012012121200000) . No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. CLEAR the DTCs .

1. Inspect the exterior mirror for damage.

1. CHECK THE INTERIOR COURTESY LAMPS Observe the interior courtesy lamps. Are the interior courtesy lamps illuminated? Yes: REFER to «Diagnostic Routine J: All The Courtesy Lamps Stay On Continuously»(ref-517595-S41690637212012121200000) . No: GO to 2 .
2. CHECK THE PUDDLE LAMP OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE Ignition OFF. Disconnect: BCM C2280C. Ignition ON. Do the puddle lamps continue to illuminate? Yes: REPAIR the circuit. No: GO to 3 .
3. CHECK FOR CORRECT BCM OPERATION Disconnect the BCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) corrosion (install new connector or terminals - clean module pins) pushed-out pins - install new pins as necessary Reconnect the BCM connectors and make sure they seat and latch correctly. Operate the system and determine if the concern is still present. Is the concern still present? Yes: CHECK OASIS for any applicable TSBs . If a TSB exists for this concern, discontinue this test and follow TSB instructions. If no TSBs address this concern, INSTALL a new BCM. REFER to «BODY CONTROL MODULE (BCM) - WITH INTELLIGENT ACCESS (IA)»(ref-517607-S22029955872012121200000) , or REFER to «BODY CONTROL MODULE (BCM) - WITHOUT INTELLIGENT ACCESS (IA)»(ref-517607-S10277508012012121200000) . No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. CLEAR the DTCs .

1. Inspect the bulbs and make sure they are OK.
2. Inspect the BCM fuse 4 (10A).
3. Inspect the interior lamp for damage.

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1. CHECK THE COURTESY LAMP OPERATION Open the left front door and observe the interior courtesy lamps. Do the interior courtesy lamps illuminate? Yes: GO to 2 . No: REFER to «Diagnostic Routine F: One Or More Interior Courtesy Lamps Are Inoperative»(ref-517595-S33213970702012121200000) .
2. CHECK ALL THE DEMAND LAMPS Check the operation of all the demand (map and vanity mirror) lamps. Are all the demand lamps inoperative? Yes: VERIFY the BCM fuse 4 (10A) is OK. If OK, GO to 3 . No: For a vanity mirror or glove compartment lamp, GO to 4 . For a map/reading lamp, GO to 6 .
3. BYPASS THE BCM Disconnect: BCM C2280D. Connect: BCM Battery C2280D Battery Positive Pin Circuit Measurement / Action Pin Circuit 22 CLN09 (YE/GN) - - Switch any demand (map or vanity mirror) lamp on. Does the demand lamp illuminate when switched on? Yes: REMOVE the jumper wire. GO to 8 . No: REMOVE the jumper wire. REPAIR the demand lamp voltage supply circuit for an open.
4. CHECK FOR VOLTAGE TO THE INOPERATIVE LAMP Ignition OFF. Disconnect: Inoperative Lamp. Ignition ON. For a vanity mirror lamp, measure: Vanity Mirror Lamp Ground Inoperative Left/Right Vanity Mirror Lamp Ground Connector-Pin Circuit Measurement / Action Pin Circuit C907-1 CLN09 (YE/GN) - - C906-1 CLN09 (YE/GN) - - For the glove compartment lamp, measure: Glove Compartment Lamp Ground C254 Ground Pin Circuit Measurement / Action Pin Circuit 1 CLN09 (YE/GN) - - Is the voltage greater than 11 volts? Yes: GO to 5 . No: REPAIR the demand lamp voltage supply circuit for an open.
5. CHECK THE LAMP GROUND CIRCUIT FOR AN OPEN For a vanity mirror lamp, measure: Vanity Mirror Lamp Vanity Mirror Lamp Inoperative Left/Right Vanity Mirror Lamp Inoperative Left/Right Vanity Mirror Lamp Connector-Pin Circuit Measurement / Action Connector-Pin Circuit C907-1 CLN09 (YE/GN) C907-2 GD233 (BK) C906-1 CLN09 (YE/GN) C906-2 GD233 (BK) For the glove compartment lamp, measure: Glove Compartment Lamp Glove Compartment Lamp C254 C254 Pin Circuit Measurement / Action Pin Circuit 1 CLN09 (YE/GN) 2 GD121 (BK/GY) Is the voltage greater than 11 volts? Yes: INSTALL a new lamp for the lamp in question. No: REPAIR the ground circuit in question.
6. CHECK FOR VOLTAGE TO THE INOPERATIVE MAP/READING LAMP Ignition OFF. Disconnect: Inoperative Lamp. Ignition ON. For a front map/reading lamp (overhead console), measure: Front Interior Lamp (Overhead Console) Ground C930 Ground Pin Circuit Measurement / Action Pin Circuit 3 CLN09 (YE/GN) - - For a rear map/reading lamp (with roof opening panel), measure: Interior Lamp Ground Inoperative Left/Right Rear Lamp (With Roof Opening Panel) Ground Connector-Pin Circuit Measurement / Action Pin Circuit C941-3 CLN09 (YE/GN) - - C942-3 CLN09 (YE/GN) - - For a rear map/reading lamp (without roof opening panel) or cargo lamp, measure: Interior Lamp Ground Inoperative Rear Lamp (Without Roof Opening Panel) or Cargo Lamp Ground Connector-Pin Circuit Measurement / Action Pin Circuit C981-1 CLN09 (YE/GN) - - C926-1 CLN09 (YE/GN) - - Is the voltage greater than 11 volts? Yes: GO to 7 . No: REPAIR the demand lamp voltage supply circuit for an open.
7. CHECK THE MAP/READING LAMP GROUND CIRCUIT FOR AN OPEN For a front interior lamp (overhead console), measure: Front Interior Lamp (Overhead Console) Front Interior Lamp (Overhead Console) C930 C930 Pin Circuit Measurement / Action Pin Circuit 2 CLN09 (YE/GN) 1 GD233 (BK) For a rear interior lamp (with roof opening panel), measure: Interior Lamp Interior Lamp Inoperative Left/Right Rear Lamp (With Roof Opening Panel) Inoperative Left/Right Rear Lamp (With Roof Opening Panel) Connector-Pin Circuit Measurement / Action Connector-Pin Circuit C941-1 CLN09 (YE/GN) C941-2 GD233 (BK) C942-1 CLN09 (YE/GN) C942-2 GD233 (BK) For a rear interior lamp (without roof opening panel) or cargo lamp, measure: Interior Lamp Interior Lamp Inoperative Rear Lamp (Without Roof Opening Panel) or Cargo Lamp Inoperative Rear Lamp (Without Roof Opening Panel) or Cargo Lamp Connector-Pin Circuit Measurement / Action Connector-Pin Circuit C926-2 CLN09 (YE/GN) C926-3 GD233 (BK) C981-2 CLN09 (YE/GN) C981-3 GD233 (BK) Is the voltage greater than 11 volts? Yes: INSTALL a new interior lamp for the lamp in question. REFER to «Interior Lamp - First Row»(ref-517595-S38868510122012121200000) , REFER to «Interior Lamp - Second Row With Moon Roof»(ref-517595-S09486689632012121200000) , or REFER to «Interior Lamp - Second Row Without Moon Roof, Third Row»(ref-517595-S07509088882012121200000) . No: REPAIR the ground circuit for the lamp in question.
8. CHECK FOR CORRECT BCM OPERATION Disconnect the BCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) corrosion (install new connector or terminals - clean module pins) pushed-out pins - install new pins as necessary Reconnect the BCM connectors and make sure they seat and latch correctly. Operate the system and determine if the concern is still present. Is the concern still present? Yes: CHECK OASIS for any applicable TSBs . If a TSB exists for this concern, discontinue this test and follow TSB instructions. If no TSBs address this concern, INSTALL a new BCM. REFER to «BODY CONTROL MODULE (BCM) - WITH INTELLIGENT ACCESS (IA)»(ref-517607-S22029955872012121200000) , or REFER to «BODY CONTROL MODULE (BCM) - WITHOUT INTELLIGENT ACCESS (IA)»(ref-517607-S10277508012012121200000) . No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. CLEAR the DTCs .

1. Inspect the interior lamps and make sure the map lamps are not on.

1. CHECK THE DEMAND LAMP VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE Ignition OFF. Disconnect: BCM C2280D. Ignition ON. Turn any demand (map or vanity mirror) lamp on. Does the demand lamp turn on? Yes: REPAIR the circuit. No: GO to 2 .
2. CHECK FOR CORRECT BCM OPERATION Disconnect the BCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) corrosion (install new connector or terminals - clean module pins) pushed-out pins - install new pins as necessary Reconnect the BCM connectors and make sure they seat and latch correctly. Operate the system and determine if the concern is still present. Is the concern still present? Yes: CHECK OASIS for any applicable TSBs . If a TSB exists for this concern, discontinue this test and follow TSB instructions. If no TSBs address this concern, INSTALL a new BCM. REFER to «BODY CONTROL MODULE (BCM) - WITH INTELLIGENT ACCESS (IA)»(ref-517607-S22029955872012121200000) , or REFER to «BODY CONTROL MODULE (BCM) - WITHOUT INTELLIGENT ACCESS (IA)»(ref-517607-S10277508012012121200000) . No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. CLEAR the DTCs .

1. Inspect the climate control system operation and make sure it operates correctly.

Scheme 41

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Scheme 44

1. CHECK FOR COMMUNICATION TO THE HVAC MODULE Ignition ON. Using a scan tool, perform network test. Does the scan tool communicate with the HVAC module? Yes: GO to 2 . No: REFER to «DIAGNOSTIC ROUTINE J»(ref-517597-S11949325312012121200000) : The Heating Ventilation Air Conditioning (HVAC) Module Does Not Respond To The Scan Tool.
2. CHECK THE CLIMATE CONTROL OPERATION Check the operation of the climate control system and verify that all of the climate controls operate correctly. Does the climate control system operate correctly? Yes: GO to 3 . No: REFER to «DTC CHART: HEATING, VENTILATION, AND AIR CONDITIONING (HVAC) MODULE - DATC»(ref-517581-S20334473502012121200000) .
3. CHECK THE AMBIENT LIGHTING LED RETURN CIRCUIT FOR AN OPEN Ignition OFF. Disconnect: HVAC Module C228C. Diode check: HVAC Module HVAC Module C228C C228C Pin Circuit Measurement / Action Pin Circuit 1 VLN53 (WH/BU) 17 RLN44 (BN) Does the meter indicate the circuit is good? Yes: GO to 4 . No: REPAIR the circuit.
4. CHECK THE AMBIENT LIGHTING GROUND CIRCUIT FOR AN OPEN Disconnect: Negative Battery Cable. Measure: HVAC Module Ground C228C Ground Pin Circuit Measurement / Action Pin Circuit 8 GD215 (BK/GY) - - Is the resistance less than 5 ohms? Yes: GO to 5 . No: REPAIR the circuit.
5. CHECK FOR CORRECT HVAC MODULE OPERATION Disconnect the HVAC connectors. Repair: corrosion (install new connector or terminals - clean module pins) corrosion (install new connector or terminals - clean module pins) pushed-out pins - install new pins as necessary Reconnect the HVAC connectors and make sure they seat and latch correctly. Operate the system and determine if the concern is still present. Is the concern still present? Yes: CHECK OASIS for any applicable TSBs . If a TSB exists for this concern, discontinue this test and follow TSB instructions. If no TSBs address this concern, INSTALL a new HVAC module: REFER to «HEATING VENTILATION AIR CONDITIONING (HVAC) MODULE»(ref-517581-S13895863382012121200000) - DATC . No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. CLEAR the DTCs .

1. Inspect the climate control system operation and make sure it operates correctly.
2. Inspect the touchscreen and make sure it operates correctly.

Scheme 45

Scheme 46

1. CHECK THE AMBIENT LIGHTING HARNESS Ignition OFF. Disconnect: HVAC Module C228C. Diode check: HVAC Module HVAC Module C228C C228C Pin Circuit Measurement / Action Pin Circuit 5 VLN506 (YE/BU) 17 RLN44 (BN) 6 VLN49 (YE/GN) 17 RLN44 (BN) 7 VLN48 (YE/OG) 17 RLN44 (BN) Does the meter indicate the circuit is good? Yes: GO to 2 . No: REPAIR the circuit in question or INSTALL a new ambient lighting harness as necessary.
2. CHECK FOR CORRECT HVAC MODULE OPERATION Disconnect and inspect all HVAC module connectors. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins pushed-out pins - install new pins as necessary Reconnect the HVAC module connectors and make sure they seat and latch correctly. Operate the system and determine if the concern is still present. Is the concern still present? Yes: CHECK OASIS for any applicable TSBs . If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new HVAC module: REFER to «HEATING VENTILATION AIR CONDITIONING (HVAC) MODULE»(ref-517581-S13895863382012121200000) - DATC . No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

Scheme 47

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Scheme 49