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Possible Causes Lincoln LS I facelift

Handles, Locks, Latches and Entry Systems 39 illustrations ~6283 words

Possible Causes

  1. DTC B1551 luggage compartment lid release circuit failure
  2. circuit 8-AA30 (WH) open or shorted to ground
  3. circuit 31-AA30 (BK/YE) open
  4. circuit 31-DA3 (BK/OG) open
  5. luggage compartment lid remote switch
  6. FEM

Scheme 69

Scheme 69: PINPOINT TEST A: THE LUGGAGE COMPARTMENT LID IS INOPERATIVE - FROM THE REMOTE SWITCH
Scheme 69: PINPOINT TEST A: THE LUGGAGE COMPARTMENT LID IS INOPERATIVE - FROM THE REMOTE SWITCH

Scheme 70

Scheme 70
Scheme 70

Scheme 71

Scheme 71
Scheme 71

Scheme 72

Scheme 72
Scheme 72
  1. A1 CHECK THE LUGGAGE COMPARTMENT LID REMOTE SWITCH INPUT TO FEM NOTE: Cycle the key from OFF to ON to enable the switched system power feature. Key in OFF position. Unlock the luggage compartment release switch with the valet key. Connect the diagnostic tool. Key in ON position. Enter the following diagnostic mode on the diagnostic tool: Monitor the FEM luggage compartment lid remote switch PID. Press and release the luggage compartment lid remote switch. Does the FEM luggage compartment lid remote switch PID agree with the luggage compartment lid remote switch position? Yes : GO to A7 . No : If the FEM luggage compartment lid remote switch PID indicates ON, GO to A2. If the PID indicates OFF, GO to A4 .
  2. A2 CHECK THE LUGGAGE COMPARTMENT LID REMOTE SWITCH Enter the following diagnostic mode on the diagnostic tool: Monitor the FEM luggage compartment lid remote switch PID. Disconnect: Luggage Compartment Lid Remote Switch C207. Did the FEM luggage compartment lid remote switch PID change from ON to OFF? Yes : INSTALL a new luggage compartment lid remote switch. CLEAR the DTCs. REPEAT the self-test. No : GO to A3.
  3. A3 CHECK CIRCUIT 8-AA30 (WH) FOR A SHORT TO GROUND Key in OFF position. Disconnect: FEM C201e. Measure the resistance between the FEM C201e-4, circuit 8-AA30 (WH), harness side and ground. Is the resistance greater than 10,000 ohms? Yes : GO to A7 . No : GO to A4.
  4. A4 CHECK CIRCUIT 8-AA30 (WH) FOR AN OPEN Disconnect: FEM C201e. Disconnect: Luggage Compartment Lid Remote Switch C207. Measure the resistance between the FEM C201e-4, circuit 8-AA30 (WH), harness side and the luggage compartment lid remote switch C207-1, circuit 8-AA30 (WH), harness side. Is the resistance less than 5 ohms? Yes : Connect all disconnected connectors and GO to A5. No : REPAIR the circuit. TEST the system for normal operation.
  5. A5 CHECK THE LUGGAGE COMPARTMENT LID REMOTE SWITCH Key in OFF position. Enter the following diagnostic mode on the diagnostic tool: Monitor the FEM luggage compartment lid remote switch PID. Connect a 10A fused jumper wire between the luggage compartment lid remote switch C207-2, circuit 31-AA30 (BK/YE), harness side and the luggage compartment lid remote switch C207-1, circuit 8-AA30 (WH), harness side, while monitoring the FEM luggage compartment lid remote switch PID. Did the FEM luggage compartment lid remote switch PID change from OFF to ON? Yes : INSTALL a new luggage compartment lid remote switch. CLEAR the DTCs. REPEAT the self-test. No : GO to A6.
  6. A6 CHECK CIRCUIT 31-AA30 (BK/YE) FOR AN OPEN Measure the resistance between the luggage compartment lid remote switch C207-2, circuit 31-AA30 (BK/YE), harness side and ground. Is the resistance less than 5 ohms? Yes : GO to A7. No : REPAIR the circuit 31 -AA30 (BK/YE) or circuit 31-DA3(BK/OG). CLEAR the DTCs. REPEAT the self-test.
  7. A7 CHECK FOR CORRECT FEM OPERATION Disconnect all FEM connectors. Check for: corrosion pushed-out pins Connect all FEM 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 FEM. REFER to «MODULE COMMUNICATIONS NETWORK - LS»(ref-207567) for the removal and installation procedure. TEST the system for normal operation. No : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. TEST the system for normal operation.
  1. circuit 29S-AA83 (OG) shorted to ground or open
  2. circuit 31-AA83 (BK/OG) open
  3. luggage compartment lid actuator
  4. REM

Scheme 73

Scheme 73: PINPOINT TEST B: THE LUGGAGE COMPARTMENT LID IS INOPERATIVE - FROM THE REMOTE SWITCH AND THE REMOTE
Scheme 73: PINPOINT TEST B: THE LUGGAGE COMPARTMENT LID IS INOPERATIVE - FROM THE REMOTE SWITCH AND THE REMOTE

Scheme 74

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Scheme 74

Scheme 75

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Scheme 75

Scheme 76

Scheme 76
Scheme 76
  1. B1 CHECK THE LUGGAGE COMPARTMENT LID REMOTE SWITCH INPUT TO THE FEM Key in OFF position. Connect the diagnostic tool. Key in ON position. Enter the following diagnostic mode on the diagnostic tool: Monitor the FEM luggage compartment lid remote switch PID. Press and release the luggage compartment lid remote switch. Does the FEM luggage compartment lid remote switch PID agree with the luggage compartment lid remote switch position? Yes : GO to B2. No : GO to B7 .
  2. B2 CHECK THE REM OUTPUT USING ACTIVE COMMANDS Trigger the REM active command RELEASE ON. Does the luggage compartment lid release? Yes : GO to B7 . No : GO to B3.
  3. B3 CHECK LUGGAGE COMPARTMENT LID REMOTE SWITCH OUTPUT FROM THE REM Disconnect: Luggage Compartment Lid Actuator C430. Enter the following diagnostic mode on the diagnostic tool: Trigger the REM luggage compartment lid release active command ON. Measure the voltage between the luggage compartment lid actuator C430-2, circuit 29S-AA83 (OG), harness side and ground. Is the voltage greater than 10 volts? Yes : GO to B4. No : GO to B5 .
  4. B4 CHECK CIRCUIT 31-AA83 (BK/OG) FOR AN OPEN Key in OFF position. Measure the resistance between the luggage compartment lid actuator C430-3, circuit 31-AA83 (BK/OG), harness side and ground. Is the resistance less than 5 ohms? Yes : INSTALL a new luggage compartment lid actuator. CLEAR the DTCs. REPEAT the self-test. No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  5. B5 CHECK CIRCUIT 29S-AA83 (OG) FOR AN OPEN Key in OFF position. Disconnect: REM C420c. Measure the resistance between the REM C420c-10, circuit 29S-AA83 (OG), harness side and the luggage compartment lid actuator C430-2, circuit 29S-AA83 (OG), harness side. Is the resistance less than 5 ohms? Yes : GO to B6. No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  6. B6 CHECK CIRCUIT 29S-AA83 (OG) FOR A SHORT TO GROUND_ Measure the resistance between the REM C420c-10, circuit 29S-AA83 (OG) harness side and ground. Is the resistance greater than 10,000 ohms? Yes : GO to B7. No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  7. B7 CHECK FOR CORRECT REM OPERATION Disconnect all REM connectors. Check for: corrosion pushed-out pins Connect all REM 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 REM. REFER to «MODULE COMMUNICATIONS NETWORK - LS»(ref-207567) . TEST the system for normal operation. No : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. TEST the system for normal operation.
  1. DTC B1309 power door lock circuit short to ground
  2. DTCB1341 power door unlock circuit short to ground
  3. circuit 8-AA10 (WH/BK) shorted to ground or open
  4. circuit 8-AA11 (WH/VT) shorted to ground or open
  5. circuit 31-LH28 (BK) open
  6. driver door lock control switch
  7. DDM

Scheme 77

Scheme 77: PINPOINT TEST C: ALL DOOR LOCKS ARE INOPERATIVE - FROM THE DRIVER DOOR LOCK CONTROL SWITCH
Scheme 77: PINPOINT TEST C: ALL DOOR LOCKS ARE INOPERATIVE - FROM THE DRIVER DOOR LOCK CONTROL SWITCH

Scheme 78

Scheme 78
Scheme 78

Scheme 79

Scheme 79
Scheme 79
  1. C1 RETRIEVE THE RECORDED DTCS FROM BOTH CONTINUOUS AND ON-DEMAND SELF-TEST - DDM Use the recorded DDM DTCs from the continuous and on-demand self-test. Are any DDM DTCs recorded? Yes : If DTCB 1309 or DTC B1341 were retrieved, GO to C3 . For all other DDM DTCs, REFER to the DDM Diagnostic Trouble Code (DTC) Index. No : GO to C2.
  2. C2 CHECK DRIVER DOOR LOCK CONTROL SWITCH AND CIRCUITS - MONITOR THE DDM DOOR LOCK AND DOOR UNLOCK PIDS NOTE: Cycle the key from OFF to ON to enable the switched system power feature. Key in OFF position. Key in ON position. Enter the following diagnostic mode on the diagnostic tool: Monitor the DDM door lock and door unlock PIDs. Lock and unlock the driver door using the driver door lock control switch while monitoring the DDM door lock and door unlock PIDs. Do the DDM door LOCK and door UNLOCK PIDs values agree with the driver door lock control switch positions? Yes : GO to C8 . No : If the PID(s) read YES at all times GO to C3. If the PID(s) read NO at all times GO to C5 .
  3. C3 CHECK THE DRIVER DOOR LOCK CONTROL SWITCH Key in OFF position. Disconnect: Driver Door Lock Control Switch C505. Carry out the driver door lock control switch component test. Refer to COMPONENT TESTING . Is the driver door lock control switch OK? Yes : GO to C4. No : INSTALL a new driver door lock control switch. REFER to «DOOR LOCK CONTROL SWITCH»(ref-207573-S35559722502005113000000) . CLEAR the DTCs. REPEAT the self-test.
  4. C4 CHECK CIRCUITS 8-AA10 (WH/BK) AND 8-AA11 (WH/VT) FOR A SHORT TO GROUND Disconnect: DDM C501d. Measure the resistance between the DDM C501 d-23, circuit 8-AA10 (WH/BK), harness side and ground; and between the DDM C501d-24, circuit 8-AA11 (WH/VT), harness side and ground. Are the resistances greater than 10,000 ohms? Yes : GO to C8 . No : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
  5. C5 CHECK THE DRIVER DOOR LOCK CONTROL SWITCH Key in OFF position. Disconnect: Driver Door Lock Control Switch C505. Carry out the driver door lock control switch component test. Refer to COMPONENT TESTING Is the driver door lock control switch OK? Yes : GO to C6. No : INSTALL a new driver door lock control switch. REFER to «DOOR LOCK CONTROL SWITCH»(ref-207573-S35559722502005113000000) . CLEAR the DTCs. REPEAT the self-test.
  6. C6 CHECK CIRCUIT 31-LH28 (BK) FOR OPEN Measure the resistance between the driver door lock control switch C505-4, circuit 31-LH28 (BK), harness side and ground. Is the resistance less than 5 ohms? Yes : GO to C7. No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  7. C7 CHECK CIRCUITS 8-AA10 (WH/BK) AND 8-AA11 (WH/VT) FOR OPEN Disconnect: DDM C501d. Measure the resistance between the DDM C501 d-23, circuit 8-AA10 (WH/BK), harness side and the driver door lock control switch C505-1, circuit 8-AA10 (WH/BK), harness side; and between the DDM C501d-24, circuit 8-AA11 (WH/VT), harness side and the driver door lock control switch C505-3, circuit 8-AA11 (WH/VT), harness side. Are the resistances less than 5 ohms? Yes : GO to C8. No : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
  8. C8 CHECK FOR CORRECT DDM OPERATION Disconnect all DDM connectors. Check for: corrosion pushed-out pins Connect all DDM 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 DDM. REFER to «MODULE COMMUNICATIONS NETWORK - LS»(ref-207567) . TEST the system for normal operation. No : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. TEST the system for normal operation.
  1. DTC 1300, power door lock circuit failure
  2. DTC 1310 power door unlock circuit failure
  3. circuit 8-AA20 (WH/BU) open
  4. circuit 8-AA21 (WH/GN) open
  5. circuit 31-LH42 (BK) open
  6. passenger door lock control switch.
  7. REM

Scheme 80

Scheme 80: PINPOINT TEST D: ALL DOOR LOCKS ARE INOPERATIVE - FROM THE PASSENGER DOOR LOCK CONTROL SWITCH
Scheme 80: PINPOINT TEST D: ALL DOOR LOCKS ARE INOPERATIVE - FROM THE PASSENGER DOOR LOCK CONTROL SWITCH

Scheme 81

Scheme 81
Scheme 81

Scheme 82

Scheme 82
Scheme 82
  1. D1 RETRIEVE THE RECORDED DTCS FROM BOTH CONTINUOUS AND ON-DEMAND SELF-TEST - REM Use the recorded REM DTCs from the continuous and on-demand self-test. Are any REM DTCs recorded? Result/Action to Yes : For DTC B1300 or B1310, GO to D3 . For all other REM DTCs, REFER to the REM Diagnostic Trouble Code (DTC) Index. No : GO to D2.
  2. D2 CHECK PASSENGER DOOR LOCK CONTROL SWITCH AND CIRCUITS - MONITOR THE REM RH FRONT DOOR LOCK AND UNLOCK PIDS NOTE: Cycle the key from OFF to ON to enable the switched system power feature. Key in OFF position. Key in ON position. Enter the following diagnostic mode on the diagnostic tool: Monitor the REM RH front door lock and unlock PIDs. Lock and unlock the RH front door using the passenger door lock control switch while monitoring the REM RH front door lock and unlock PIDs. Do the REM RH front door lock and unlock PIDs values agree with the passenger door lock control switch positions? Yes : go to D8 . No : If the PID(s) read YES at all times GO to D3. If the PID(s) read NO at all times GO to D5 .
  3. D3 CHECK PASSENGER DOOR LOCK CONTROL SWITCH Key in OFF position. Disconnect: Passenger Door Lock Control Switch C605. Carry out the passenger door lock control switch component test. Refer to COMPONENT TESTING Is the passenger door lock control switch OK? Yes : GO to D4. No : INSTALL a new passenger door lock control switch. REFER to «DOOR LOCK CONTROL SWITCH»(ref-207573-S35559722502005113000000) . CLEAR the DTCs. REPEAT the self-test.
  4. D4 CHECK CIRCUITS 8-AA20 (WH/BU) AND 8-AA21 (WH/GN) FOR A SHORT TO GROUND Disconnect: REM C420c. Measure the resistance between the REM C420c-20, circuit 8-AA20 (WH/BU), harness side and ground; and between the REM C420c-21, circuit 8-AA21 (WH/GN), harness side and ground. Are the resistances greater than 10,000 ohms? Yes : GO to D8 . No : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
  5. D5 CHECK PASSENGER DOOR LOCK CONTROL SWITCH Key in OFF position. Disconnect: Passenger Door Lock Control Switch C605. Carry out the passenger door lock control switch component test. Refer to COMPONENT TESTING Is the passenger door lock control switch OK? Yes : GO to D6. No : INSTALL a new passenger door lock control switch. REFER to «DOOR LOCK CONTROL SWITCH»(ref-207573-S35559722502005113000000) . CLEAR the DTCs. REPEAT the self-test.
  6. D6 CHECK CIRCUIT 31-LH42 (BK) FOR AN OPEN Measure the resistance between the passenger door lock control switch C605-4, circuit 31-LH42 (BK), harness side and ground. Is the resistance less than 5 ohms? Yes : GO to D7. No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  7. D7 CHECK CIRCUITS 8-AA20 (WH/BU) AND 8-AA21 (WH/GN) FOR AN OPEN Disconnect: REM C420c. Measure the resistance between the REM C420c-20, circuit 8-AA20 (WH/BU), harness side and passenger door lock control switch C605-1, circuit 8-AA20 (WH/BU), harness side; and between the REM C420c-21, circuit 8-AA21 (WH/GN), harness side and the passenger door lock control switch C605-3, circuit 8-AA21 (WH/GN), harness side. Are the resistances less than 5 ohms? Yes : GO to D8. No : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
  8. D8 CHECK FOR CORRECT REM OPERATION Disconnect all REM connectors. Check for: corrosion pushed-out pins Connect all REM 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 REM. REFER to «MODULE COMMUNICATIONS NETWORK - LS»(ref-207567) . TEST the system for normal operation. No : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. TEST the system for normal operation.
  1. DTC B2112, door driver set switch stuck failure
  2. DTC B2116, door driver reset switch stuck failure
  3. circuit 31-AA58 (BK) open
  4. circuit 31S-AA78 (BK/BU) open or a short to ground
  5. circuit 31S-AA79 (BK/WH) open or a short to ground
  6. driver door latch (driver set/reset switch)
  7. DDM

Scheme 83

Scheme 83: PINPOINT TEST E: ALL DOOR LOCKS ARE INOPERATIVE - FROM THE DRIVER DOOR LOCK CYLINDER
Scheme 83: PINPOINT TEST E: ALL DOOR LOCKS ARE INOPERATIVE - FROM THE DRIVER DOOR LOCK CYLINDER

Scheme 84

Scheme 84
Scheme 84

Scheme 85

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Scheme 85

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Scheme 86
Scheme 86

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Scheme 88

Scheme 88
Scheme 88
  1. E1 RETRIEVE THE RECORDED DTCS FROM BOTH CONTINUOUS AND ON-DEMAND SELF-TEST - DDM Use the recorded DDM DTCs from the continuous and on-demand self-test. Are any DDM DTCs recorded? Yes : For DTC B2112 or DTC B2116, GO to E3 . For all other DDM DTCs, REFER to the DDM Diagnostic Trouble Code (DTC) Index. No : GO to E2.
  2. E2 CHECK DRIVER DOOR LOCK CYLINDER AND CIRCUITS - MONITOR THE DDM LOCK CYLINDER INPUT SWITCH STATUS AND DOOR UNLOCK DISARM INPUT SWITCH STATUS PIDS NOTE: Cycle the key from OFF to ON to enable the switched system power feature. Key in OFF position. Key in ON position. Enter the following diagnostic mode on the diagnostic tool: Monitor the DDM lock cylinder input switch status and door unlock disarm input switch status PIDs. Lock and unlock the driver door using the driver door lock cylinder while monitoring the DDM lock cylinder input switch status and door unlock disarm input switch status PIDs. Do the DDM lock cylinder input switch status and door unlock disarm input switch status PIDs values agree with the driver door lock cylinder positions? Yes : GO to E9 . No : GO to E3.
  3. E3 CHECK CIRCUITS 31S-AA78 (BK/BU) AND 31S-AA79 (BK/WH) FOR A SHORT TO GROUND Key in OFF position. Disconnect: DDM C501c. Measure the resistance between the DDM C501c-16, circuit 31S-AA78 (BK/BU), harness side and ground; and between the DDM C501c-17, circuit 31S-AA79 (BK/WH), harness side and ground. Are the resistances greater than 10,000 ohms? Yes : GO to E5 . No : GO to E4.
  4. E4 CHECK DRIVER DOOR LOCK LATCH FOR A SHORT TO GROUND Disconnect: Driver Door Latch C525. Measure the resistance between the DDM C501c-16, circuit 31S-AA78 (BK/BU), harness side and ground; and between the DDM C501c-17, circuit 31S-AA79 (BK/WH), harness side and ground. Are the resistances greater than 10,000 ohms? Yes : INSTALL a new driver door latch. REFER to «FRONT DOOR HANDLE»(ref-207573-S19087920692005113000000) . CLEAR the DTCs. REPEAT the self-test. No : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
  5. E5 CHECK DDM FOR AN INTERNAL SHORT TO GROUND Connect: DDM C501c. Disconnect: Driver Door Latch C525. Measure the resistance between the driver door latch C525-7, circuit 31S-AA78 (BK/BU), harness side and ground; and between the driver door latch C525-5, circuit 31S-AA79 (BK/WH), harness side and ground. Are the resistances greater than 10,000 ohms? Yes : GO to E6. No : GO to E9 .
  6. E6 CHECK CIRCUIT 31-AA58 (BK) FOR AN OPEN Measure the resistance between the driver door latch C525-6, circuit 31-AA58 (BK), harness side and ground. Is the resistance less than 5 ohms? Yes : GO to E7. No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  7. E7 CHECK DRIVER SET AND RESET SWITCH Connect: Driver Door Latch C525. Disconnect: DDM C501c. Measure the resistance between the DDM C501c-16, circuit 31S-AA78 (BK/BU), harness side and ground, while turning the key cylinder to the SET position; and between the DDM C501 c-17, circuit 31S-AA79 (BK/WH), harness side and ground, while turning the key cylinder to the RESET position. Are the resistances less than 5 ohms? Yes : GO to E9 . No : GO to E8.
  8. E8 CHECK CIRCUITS 31S-AA78 (BK/BU) AND 31S-AA79 (BK/WH) FOR AN OPEN Disconnect: Driver Door Latch C525. Measure the resistance between the DDM C501c-16, circuit 31S-AA78 (BK/BU), harness side and the driver door latch C525-7, circuit 31S-AA78 (BK/BU), harness side; and between the DDM C501c-17, circuit 31S-AA79 (BK/WH), harness side and the driver door latch C525-5, circuit 31S-AA79 (BK/WH), harness side. Are the resistances less than 5 ohms? Yes : INSTALL a new driver door latch. REFER to «FRONT DOOR HANDLE»(ref-207573-S19087920692005113000000) . CLEAR the DTCs. REPEAT the self-test. No : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
  9. E9 CHECK FOR CORRECT DDM OPERATION Disconnect all DDM connectors. Check for: corrosion pushed-out pins Connect all DDM 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 DDM. REFER to «MODULE COMMUNICATIONS NETWORK - LS»(ref-207567) . TEST the system for normal operation. No : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. TEST the system for normal operation.
  1. circuit 33-AA10 (YE/BK) shorted to ground or open
  2. circuit 32-AA11 (WH/VT) shorted to ground or open
  3. driver door latch
  4. DDM

Scheme 89

Scheme 89: PINPOINT TEST F: A SINGLE DOOR LOCK IS INOPERATIVE - DRIVER DOOR
Scheme 89: PINPOINT TEST F: A SINGLE DOOR LOCK IS INOPERATIVE - DRIVER DOOR

Scheme 90

Scheme 90
Scheme 90

Scheme 91

Scheme 91
Scheme 91
  1. F1 CHECK DRIVER DOOR LOCK OPERATION USING ACTIVE COMMANDS NOTE: Cycle the key from OFF to ON to enable the switched system power feature. Key in OFF position. Connect the diagnostic tool. Key in ON position. Trigger the DDM driver door lock and driver door unlock active commands on and off. Do the DDM driver door lock and driver door unlock active commands operate correctly? Yes : GO to F5 . No : GO to F2.
  2. F2 CHECK DDM LOCK AND UNLOCK OUTPUTS USING ACTIVE COMMANDS Key in OFF position. Disconnect: Driver Door Latch C525. Key in ON position. Measure the voltage between the driver door latch C525-2, circuit 33-AA10 (YE/BK), harness side and ground, while triggering the DDM driver door lock active command to ON; and measure the voltage between the driver door latch C525-10, circuit 32-AA11 (WH/VT), harness side and ground, while triggering the DDM driver door unlock active command to ON. Are the voltages greater than 10 volts? Yes : INSTALL a new driver door latch. REFER to «FRONT DOOR HANDLE»(ref-207573-S19087920692005113000000) . CLEAR the DTCs. REPEAT the self-test. No : GO to F3.
  3. F3 CHECK CIRCUITS 33-AA10 (YE/BK) AND 32-AA11 (WH/VT) FOR AN OPEN Key in OFF position. Disconnect: DDM C501c. Measure the resistance between the driver door latch C525-2, circuit 33-AA10 (YE/BK), harness side and the DDM C501c-8, circuit 33-AA10 (YE/BK) harness side; and between the driver door latch C525-10, circuit 32-AA11 (WH/VT) harness side and the DDM C501c-9, circuit 32-AA11 (WH/VT) harness side. Are the resistances less than 5 ohms? Yes : GO to F4. No : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
  4. F4 CHECK CIRCUITS 33-AA10 (YE/BK) AND 32-AA11 (WH/VT) FOR A SHORT TO GROUND Measure the resistance between the driver door latch C525-2, circuit 33-AA10 (YE/BK), harness side and ground; and between the driver door latch C525-10, circuit 32-AA11 (WH/VT), harness side and ground. Are the resistances greater than 10,000 ohms? Yes : GO to F5. No : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
  5. F5 CHECK FOR CORRECT DDM OPERATION Disconnect all DDM connectors. Check for: corrosion pushed-out pins Connect all DDM 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 DDM. REFER to «MODULE COMMUNICATIONS NETWORK - LS»(ref-207567) . TEST the system for normal operation. No : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. TEST the system for normal operation.
  1. circuit 29S-DK31 (OG/BK) shorted to ground or open
  2. circuit 31-DK30 (BK/OG) open
  3. circuit 32-AA1 (WH/RD) shorted to ground or open
  4. circuit 32-AA16 (WH/BK) shorted to ground or open
  5. circuit 33-AA2 (YE/RD) shorted to ground or open
  6. circuit 33-AA15 (YE/GN) shorted to ground or open.
  7. REM

Scheme 92

Scheme 92: PINPOINT TEST G: MORE THAN ONE DOOR LOCK IS INOPERATIVE - RH FRONT DOOR, RH REAR DOOR AND LH REAR DO
Scheme 92: PINPOINT TEST G: MORE THAN ONE DOOR LOCK IS INOPERATIVE - RH FRONT DOOR, RH REAR DOOR AND LH REAR DO

Scheme 93

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Scheme 93

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Scheme 95

Scheme 95
Scheme 95
  1. G1 RETRIEVE THE RECORDED DTCS FROM BOTH CONTINUOUS AND ON-DEMAND SELF-TEST - REM Use the recorded REM DTCs from the continuous and on-demand self-test. Are any DTCs recorded? Yes : REFER to the REM Diagnostic Trouble Code (DTC) Index. No : GO to G2.
  2. G2 CHECK BATTERY JUNCTION BOX (BJB) FUSE 1 (15A) FOR VOLTAGE NOTE: Cycle the key from OFF to ON to enable the switched system power feature. Disconnect: BJB fuse 1 (15A). Measure the voltage between the BJB fuse 1 (15A) input cavity, component side and ground. Is the voltage greater than 10 volts? Yes : RECONNECT the BJB fuse1 (15A).GO to G3. No : REPAIR the BJB. CLEAR the DTCs. REPEAT the self-test.
  3. G3 CHECK CIRCUIT 29S-DK31 (OG/BK) FOR OPEN Key in OFF position. Disconnect: REM C420c. Key in ON position. Measure the voltage between the REM C420c-13, circuit 29S-DK31 (OG/BK), harness side and ground. Is the voltage greater than 10 volts? Yes : GO to G4. No : REPAIR circuit 29S-DK31 (OG/BK). CLEAR the DTCs. REPEAT the self-test.
  4. G4 CHECK REM OUTPUT USING ACTIVE COMMANDS Key in OFF position. Connect: REM C420c. Key in ON position. Trigger the REM LH rear LOCK, RH rear LOCK, RH rear UNLOCK and LH rear UNLOCK active commands ON and OFF while observing the RH front, RH rear and LH rear latches. Do the REM LH rear lock, LH rear unlock, RH rear lock and RH rear unlock active commands operate correctly? Yes : GO to G6 . No : If only an individual lock does not operate, REFER to «SYMPTOM CHART»(ref-207573-S27728808492005113000000) . If two or more do not operate, GO to G5.
  5. G5 CHECK CIRCUITS 33-AA2 (YE/RD), 32-AA1 (WH/RD), 33-AA15 (YE/GN) AND 32-AA16 (WH/BK) FOR A SHORT TO GROUND Key in OFF position. Disconnect: REM C420c. Measure the resistance between the REM connector, harness side and ground as follows: CONNECTOR PIN CHART Connector Pin Circuit C420c-4 33-AA15 (YE/GN) C420c-5 33-AA2 (YE/RD) C420c-6 32-AA1 (WH/RD) C420c-7 32-AA16 (WH/BK) Are the resistances greater than 10,000 ohms? Yes : GO to G6. No : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
  6. G6 CHECK CIRCUIT 31-DK30H (BK/OG) FOR AN OPEN Disconnect: REM C420b. Measure the resistance between the REM C420b-12, circuit 31-DK30H (BK/OG), harness side and ground. Is the resistance less than 5 ohms? Yes : GO to G7. No : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
  7. G7 CHECK FOR CORRECT REM OPERATION Disconnect all REM connectors. Check for: corrosion pushed-out pins Connect all REM 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 REM. REFER to «MODULE COMMUNICATIONS NETWORK - LS»(ref-207567) . TEST the system for normal operation. No : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. TEST the system for normal operation.
  1. circuit 32-AA21 (WH/GN) shorted to ground or open
  2. circuit 32-AA1 (WH/RD) shorted to ground or open
  3. circuit 32-AA26 (WH/BU) shorted to ground or open
  4. circuit 33-AA20 (YE/BU) shorted to ground or open
  5. circuit 33-AA2 (YE/RD) shorted to ground or open
  6. circuit 33-AA25 (YE/RD) shorted to ground or open
  7. door latch (front or rear)
  8. REM

Scheme 96

Scheme 96: PINPOINT TEST H: MORE THAN ONE DOOR LOCK IS INOPERATIVE - RH FRONT DOOR AND RH REAR DOOR
Scheme 96: PINPOINT TEST H: MORE THAN ONE DOOR LOCK IS INOPERATIVE - RH FRONT DOOR AND RH REAR DOOR

Scheme 97

Scheme 97
Scheme 97

Scheme 98

Scheme 98
Scheme 98

Scheme 99

Scheme 99
Scheme 99

Scheme 100

Scheme 100
Scheme 100
  1. H1 RETRIEVE THE RECORDED DTCS FROM BOTH CONTINUOUS AND ON-DEMAND SELF-TEST - REM Use the recorded REM DTCs from the continuous and on-demand self-test. Are any DTCs recorded? Yes : REFER to the REM Diagnostic Trouble Code (DTC) Index. No : GO to H2.
  2. H2 CHECK REM OUTPUT USING ACTIVE COMMANDS Key in ON position. Trigger the REM RH rear lock and RH rear unlock active commands ON and OFF while observing the RH front and RH rear lock function. Do the REM RH rear lock and RH rear unlock active commands operate correctly? Yes : GO to H6 . No : GO to H3.
  3. H3 CHECK REM OUTPUT TO RH FRONT AND RH REAR LATCHES NOTE: Disconnect the inoperative door latch. If both doors are inoperative you must disconnect both latches. Key in OFF position. Disconnect: RH Rear Door Latch C804. Disconnect: RH Front Door Latch C609. Key in ON position. Measure the voltage between the RH front door latch C609-2, circuit 33-AA20 (YE/BU), harness side and ground, while triggering the REM RH front door lock active command to ON; and measure the voltage between the RH front door latch C609-10, circuit 32-AA21 (WH/GN), harness side and ground, while triggering the REM RH front door unlock active command to ON. Measure the voltage between the RH rear door latch C804-2, circuit 33-AA25 (YE/RD), harness side and ground, while triggering the REM RH rear door lock active command to ON; and measure the voltage between RH rear door latch C804-10, circuit 32-AA26 (WH/BU), harness side and ground, while triggering the REM RH rear door unlock active command to ON. Are the voltages greater than 10 volts? Yes : INSTALL a new door latch(es). REFER to «FRONT DOOR HANDLE»(ref-207573-S19087920692005113000000) or Rear Door Handle. CLEAR the DTCs. REPEAT the self-test. No : GO to H4.
  4. H4 CHECK CIRCUITS 33-AA20 (YE/BU), 32-AA21 (WH/GN), 33-AA2 (YE/RD), 32-AA1 (WH/RD), 32-AA26 (WH/BU) AND 33-AA25 (YE/RD) FOR AN OPEN Key in OFF position. Disconnect: REM C420c. Measure the resistance between the RH front door latch C609-2, circuit 33-AA20 (YE/BU), harness side and the REM C420c-5, circuit 33-AA2 (YE/RD), harness side; and between the RH front door latch C609-10, circuit 32-AA21 (WH/GN), harness side and the REM C420c-6, circuit 32-AA1 (WH/RD), harness side. Measure the resistance between the RH rear door latch C804-2, circuit 33-AA25 (YE/RD), harness side and the REM C420c-5, circuit 33-AA2 (YE/RD), harness side; and between the RH rear door lock latch C804-10, circuit 32-AA26 (WH/BU), harness side and the REM C420c-6, circuit 32-AA1 (WH/RD), harness side. Are the resistances less than 5 ohms? Yes : GO to H5. No : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
  5. H5 CHECK CIRCUITS 33-AA2 (YE/RD) AND 32-AA1 (WH/RD) FOR SHORT TO GROUND Measure the resistance between the REM C420c-5, circuit 33-AA2 (YE/RD) harness side and ground; and between the REM C420c-6, circuit 32-AA1 (WH/RD), harness side and ground. Are the resistances greater than 10,000 ohms? Yes : GO to H6. No : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
  6. H6 CHECK FOR CORRECT REM OPERATION Disconnect all REM connectors. Check for: corrosion pushed-out pins Connect all REM 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 REM. REFER to «MODULE COMMUNICATIONS NETWORK - LS»(ref-207567) . TEST the system for normal operation. No : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. TEST the system for normal operation.
  1. circuit 32-AA16 (WH/BK) shorted to ground or open
  2. circuit 33-AA15 (YE/GN) shorted to ground or open
  3. rear door latch
  4. REM

Scheme 101

Scheme 101: PINPOINT TEST I: A SINGLE DOOR LOCK IS INOPERATIVE - LH REAR DOOR
Scheme 101: PINPOINT TEST I: A SINGLE DOOR LOCK IS INOPERATIVE - LH REAR DOOR

Scheme 102

Scheme 102
Scheme 102

Scheme 103

Scheme 103
Scheme 103
  1. I1 RETRIEVE THE RECORDED DTCS FROM BOTH CONTINUOUS AND ON-DEMAND SELF-TEST - REM Use the recorded REM DTCs from the continuous and on-demand self-test. Are any DTCs recorded? Yes : REFER to the REM Diagnostic Trouble Code (DTC) Index. No : GO to I2.
  2. I2 CHECK REM OUTPUT USING ACTIVE COMMANDS Key in ON position. Trigger the REM LH rear lock and LH rear unlock active commands ON and OFF while observing the LH rear lock function. Do the REM LH rear lock and LH rear unlock active commands operate correctly? Yes : GO to I6 . No : GO to I3.
  3. I3 CHECK REM OUTPUT TO LH REAR LATCH Key in OFF position. Disconnect: LH Rear Door Latch C704. Key in ON position. Measure the voltage between the LH rear door latch C704-2, circuit 33-AA15 (YE/GN), harness side and ground, while triggering the REM LH rear door lock active command to ON; and measure the voltage between the LH rear door latch C704-10, circuit 32-AA16 (WH/BK), harness side and ground, while triggering the REM LH rear door unlock active command to ON. Are the voltages greater than 10 volts? Yes : INSTALL a new rear door latch. REFER to «REAR DOOR HANDLE»(ref-207573-S23628795122005113000000) . CLEAR the DTCs. REPEAT the self-test. No : GO to I4.
  4. I4 CHECK CIRCUIT 33-AA15 (YE/GN) AND 32-AA16 (WH/BK) FOR AN OPEN Key in OFF position. Disconnect: REM C420c. Measure the resistance between the LH rear door latch C704-2, circuit 33-AA15 (YE/GN), harness side and the REM C420c-4, circuit 33-AA15 (YE/GN), harness side; and between the LH rear door latch C704-10, circuit 32-AA16 (WH/BK), harness side and the REM C420c-7, circuit 32-AA16 (WH/BK), harness side. Are the resistances less than 5 ohms? Yes : GO to I5. No : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
  5. I5 CHECK CIRCUITS 33-AA15 (YE/GN) AND 32-AA16 (WH/BK) FOR A SHORT TO GROUND Measure the resistance between the REM C420c-4, circuit 33-AA15 (YE/GN), harness side and ground; and between the REM C420c-7, circuit 32-AA16 (WH/BK), harness side and ground. Are the resistances greater than 10,000 ohms? Yes : GO to I6. No : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
  6. I6 CHECK FOR CORRECT REM OPERATION Disconnect all REM connectors. Check for: corrosion pushed-out pins Connect all REM 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 REM. REFER to «MODULE COMMUNICATIONS NETWORK - LS»(ref-207567) . TEST the system for normal operation. No : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. TEST the system for normal operation.
  1. B1526 keyless entry circuit short to ground
  2. circuit 7-AA70 (YE/GN) shorted to ground or open
  3. circuit 8-AA70 (WH/GN) shorted to ground or open
  4. circuit 9-AA70 (BN/GN) open
  5. circuit 10-AA70 (GY/OG) shorted to ground or open
  6. keyless entry keypad
  7. DDM

Scheme 104

Scheme 104: PINPOINT TEST J: THE DOORS DO NOT LOCK/UNLOCK USING THE KEYLESS ENTRY KEYPAD
Scheme 104: PINPOINT TEST J: THE DOORS DO NOT LOCK/UNLOCK USING THE KEYLESS ENTRY KEYPAD

Scheme 105

Scheme 105
Scheme 105

Scheme 106

Scheme 106
Scheme 106

Scheme 107

Scheme 107
Scheme 107
  1. J1 CHECK THE LOCK/UNLOCK OPERATION FROM THE DRIVER DOOR LOCK CONTROL SWITCH Lock and unlock all the doors using the driver door lock control switch. Do all the doors lock and unlock correctly? Yes : If the memory seat does not operate correctly using the keyless entry keypad and all other functions do operate correctly, GO to J2. If one or more other functions do not operate correctly using the keyless entry keypad, GO to J3 . No : REFER to the «SYMPTOM CHART»(ref-207573-S27728808492005113000000) to diagnose the inoperative function.
  2. J2 CHECK THAT KEYLESS ENTRY KEYPAD IS ASSOCIATED WITH A MEMORY POSITION Activate the keyless entry keypad memory recall feature. Position the seat, mirrors, steering column and adjustable pedals to the desired positions. Does the keyless entry keypad operate correctly? Yes : The system is operating correctly at this time. CLEAR the DTCs. REPEAT the self-test. No : GO to J3.
  3. J3 CHECK THE DIAGNOSTIC TROUBLE CODE (DTCS) Refer to the recorded results from the DDM self-test. Is DTC B1526 recorded? Yes : GO to J4. No : GO to J6 .
  4. J4 CHECK THE KEYLESS ENTRY KEYPAD INPUT TO THE DDM FOR A SHORT TO GROUND Key in OFF position. Disconnect: DDM C501d. Measure the resistance between each DDM C501d pin, harness side and ground using the following chart: DDM C501D CIRCUIT CHART DDM C501d Circuit 19 8-AA70 (WH/GN) 20 10-AA70 (GY/OG) 21 7-AA70 (YE/GN) Is each resistance greater than 10,000 ohms? Yes : GO to J10 . No : GO to J5.
  5. J5 CHECK THE KEYLESS ENTRY KEYPAD FOR A SHORT TO GROUND Disconnect: Keyless Entry Keypad C500. Measure the resistance between each DDM C501d pin, harness side and ground using the following chart: DDM C501D CIRCUIT CHART DDM C501d Circuit 19 8-AA70 (WH/GN) 20 10-AA70 (GY/OG) 21 7-AA70 (YE/GN) Is each resistance greater than 10,000 ohms? Yes : INSTALL a new keyless entry keypad. REFER to «KEYLESS ENTRY KEYPAD»(ref-207573-S41165592092005113000000) . CLEAR the DTCs. REPEAT the self-test. No : REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.
  6. J6 CHECK THE FACTORY KEYLESS CODE Enter the following diagnostic mode on the diagnostic tool: Monitor the DDM key code PID. Record the code. Does the recorded code match the code on the factory sticker or wallet card? Yes : GO to J7. No : CHECK the operation of the factory code retrieved from the DDM. If OK, NOTIFY customer of the correct code. If still inoperative, CLEAR the DTCs. REPEAT the self-test and GO to J7.
  7. J7 CHECK THE KEYLESS ENTRY KEYPAD OPERATION Key in OFF position. Disconnect: DDM C501d. Measure the resistance between each DDM C501d pin, harness side and ground while pressing the associated keyless entry keypad button using the following chart: DDM C501D CIRCUIT CHART DDM C501d Circuit Keypad Buttons 19 8-AA70 (WH/GN) 1/2, 3/4 and 5/6 20 10-AA70 (GY/OG) 5/6 and 7/8 21 7-AA70 (YE/GN) 3/4 and 9/0 Is each resistance less than 5 ohms with the associated button pressed? Yes : GO to J10 . No : GO to J8.
  8. J8 CHECK CIRCUIT 9-AA70 (BN/GN) FOR AN OPEN Disconnect: DDM C501c. Disconnect: Keyless Entry Keypad C500. Measure the resistance between the keyless entry keypad C500-6, circuit 9-AA70 (BN/GN), harness side and the DDM C501c-20, circuit 9-AA70 (BN/GN), harness side. Is the resistance less than 5 ohms? Yes : GO to J9. No : REPAIR the circuit. TEST the system for normal operation.
  9. J9 CHECK THE KEYLESS ENTRY KEYPAD CIRCUITS FOR AN OPEN Measure the resistance between each DDM C501d pins, harness side and the associated keyless entry keypad C500 pins using the following chart: DDM C501D CIRCUIT CHART DDM C501d Circuit Keyless Entry Keypad C500 pin 19 8-AA70 (WH/GN) pin 1 pin 20 10-AA70 (GY/OG) pin 3 pin 21 7-AA70 (YE/GN) pin 7 Is each resistance less than 5 ohms? Yes : INSTALL a new keyless entry keypad. REFER to «KEYLESS ENTRY KEYPAD»(ref-207573-S36272667092005113000000) . CLEAR the DTCs. REPEAT the self-test No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  10. J10 CHECK FOR CORRECT DDM OPERATION Disconnect all DDM connectors. Check for: corrosion pushed-out pins Connect all DDM 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 DDM. REFER to «MODULE COMMUNICATIONS NETWORK - LS»(ref-207567) . CLEAR the DTCs. REPEAT the self-test. No : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test
  1. remote transmitter battery
  2. remote transmitter programming
  3. remote transmitter
  4. aftermarket systems
  5. high power devices
  6. TV/radio transmission towers
  7. DDM
  1. remote transmitter battery
  2. remote transmitter programming
  3. DDM
  1. Door ajar switches
  2. driver door module (DDM)
  3. Vehicle speed sensor (VSS) message from ABS module
  4. Digital transmission range sensor message from the powertrain control module (PCM)
  1. Driver door ajar switch
  2. Passenger door ajar switch
  3. driver door module (DDM)
  1. remote transmitter battery
  2. remote transmitter programming
  3. remote transmitter association with a memory position
  4. DDM
  1. remote transmitter battery
  2. remote transmitter programming
  3. remote transmitter association with a memory position
  4. DDM
  1. DDM DTC B2425 RKE out of synch
  2. aftermarket systems
  3. high power devices
  4. TV/radio transmission towers
  5. remote transmitter
  6. DDM
  7. remote transmitter button pressed a substantial amount of times while outside the range of the vehicle
  1. remote transmitter
  2. DDM