Power Window System: Wiring Infiniti M45 II

Wiring Diagram - WINDOW

Note. For additional information, see SYSTEM WIRING DIAGRAMS article.

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1. Check that other systems using the signal of the following systems operate normally.

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1. CHECK COMMUNICATION SIGNAL Turn ignition switch OFF. Check the signal between malfunctioning door control unit connector and ground with oscilloscope. OK or NG OK >> Communication signal is OK. NG >> GO TO 2
2. CHECK COMMUNICATION CIRCUIT Disconnect driver door control unit (LCU01) and malfunctioning door control unit connector. Check continuity between driver door control unit (LCU01) and malfunctioning door control unit connector. Driver door control unit (LCU01) connector D8 terminal 5 and passenger door control unit connector D38 terminal 15. 5 (L/Y) - 15 (L/Y) : Continuity should exist. Driver door control unit (LCU01) connector D8 terminal 5 and rear LH door control unit connector D58 terminal 15. 5 (L/Y) - 15 (L/Y) : Continuity should exist. Driver door control unit (LCU01) connector D8 terminal 5 and rear RH door control unit connector D78 terminal 15. 5 (L/Y) - 15 (L/Y) : Continuity should exist. Check continuity between driver door control unit (LCU01) connector D8 terminal 5 and body ground. 5 (L/Y) - Ground : Continuity should not exist. OK or NG OK >> Replace driver door control unit (LCU01). NG >> Repair or replace harness between driver door control unit (LCU01) and malfunctioning door control unit.

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1. CHECK DRIVER DOOR CONTROL UNIT OUTPUT SIGNAL Turn ignition switch OFF. Disconnect front power window regulator (driver side) connector. Turn ignition switch ON. Check voltage between front power window regulator (driver side) connector and ground. OK or NG OK >> Replace front power window regulator (driver side). NG >> GO TO 2
2. CHECK DRIVER DOOR CONTROL UNIT CIRCUIT Turn ignition switch OFF. Disconnect driver door control unit (LCU01) connector. Check continuity between front power window regulator (driver side) connector D7 terminals 1, 2 and driver door control unit (LCU01) connector D8 terminals 11, 18. 18 (L/R) - 1 (L/R) : Continuity should exist. 11 (L/W) - 2 (L/W) : Continuity should exist. Check continuity between driver door control unit (LCU01) connector D8 terminals 11,18 and ground. 11 (L/W) - Ground : Continuity should not exist. 18 (L/R) - Ground : Continuity should not exist. OK or NG OK >> Replace driver door control unit (LCU01). NG >> Repair or replace harness between driver door control unit (LCU01) and front power window regulator (driver side).

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1. CHECK PASSENGER DOOR CONTROL UNIT OUTPUT SIGNAL Turn ignition switch OFF. Disconnect front power window regulator (passenger side) connector. Turn ignition switch ON. Check voltage between front power window regulator (passenger side) connector and ground. OK or NG OK >> Replace power window regulator (passenger side). NG >> GO TO 2
2. CHECK FRONT POWER WINDOW REGULATOR (PASSENGER SIDE) CIRCUIT Turn ignition switch OFF. Disconnect passenger door control unit connector. Check continuity between passenger door control unit connector D38 terminals 3, 14 and front power window regulator (passenger side) connector D37 terminals 1, 2. 3 (L/W) - 2 (L/W) : Continuity should exist. 14 (L/R) - 1 (L/R) : Continuity should exist. Check continuity between passenger door control unit connector D38 terminals 3, 14 and ground. 3 (L/W) - Ground : Continuity should not exist. 14 (L/R) - Ground : Continuity should not exist. OK or NG OK >> Replace passenger door control unit. NG >> Repair or replace harness between passenger door control unit and front power window regulator (passenger side).

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1. CHECK REAR DOOR CONTROL UNIT LH OR RH OUTPUT SIGNAL Turn ignition switch ON. Check voltage between rear power window regulator LH or RH connector D57 (LH) or D77 (RH) terminals 1, 2 and ground. OK or NG OK >> Replace rear power window regulator LH or RH. NG >> GO TO 2
2. CHECK REAR POWER WINDOW REGULATOR LH OR RH CIRCUIT Turn ignition switch OFF. Disconnect rear door control unit LH or RH and rear power window regulator LH or RH connector. Check continuity between rear door control unit LH or RH connector D58 (LH) or D78 (RH) terminals 3, 14 and rear power window regulator LH or RH connector D57 (LH) or D77 (RH) terminals 1, 2. 3 (L/W) - 2 (L/W) : Continuity should exist. 14 (L/R) - 1 (L/R) : Continuity should exist. Check continuity between rear door control unit LH or RH connector D58 (LH) or D78 (RH) terminals 3, 14 and ground. 3 (L/W) - Ground : Continuity should not exist. 14 (L/R) - Ground : Continuity should not exist. OK or NG OK >> Replace rear door control unit LH or RH. NG >> Repair or replace harness between rear door control unit LH or RH and rear power window regulator LH or RH.

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1. CHECK DRIVER DOOR LIMIT SWITCH SIGNAL Turn ignition switch ON. Check voltage between driver door control unit (LCU01) connector and ground. OK or NG OK >> Limit switch circuit is OK. NG >> GO TO 2
2. CHECK LIMIT SWITCH GROUND CIRCUIT Turn ignition switch OFF. Disconnect front power window regulator (driver side) connector. Check continuity between front power window regulator (driver side) connector D7 terminal 3 and ground. 3 (B) - Ground : Continuity should exist. OK or NG OK >> GO TO 3. NG >> Repair or replace harness.
3. CHECK HARNESS CONTINUITY Disconnect driver door control unit (LCU01) connector. Check continuity between driver door control unit (LCU01) connector D8 terminal 7 and front power window regulator (driver side) connector D7 terminal 4. 7 (PU) - 4 (PU) : Continuity should exist. Check continuity between driver door control unit (LCU01) connector D8 terminal 7 and ground. 7 (PU) - Ground : Continuity should not exist. OK or NG OK >> GO TO 4. NG >> Repair or replace harness between driver door control unit (LCU01) and front power window regulator (driver side).
4. CHECK DRIVER DOOR CONTROL UNIT OUTPUT SIGNAL Connect driver door control unit (LCU01) connector. Turn ignition switch ON. Check voltage between driver door control unit (LCU01) connector D8 terminal 7 and ground. 7(PU) - Ground : Approx. 5V OK or NG OK >> Replace front power window regulator (driver side). NG >> Replace driver door control unit (LCU01).

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1. CHECK PASSENGER DOOR LIMIT SWITCH SIGNAL Turn ignition switch ON. Check voltage between passenger door control unit connector and ground. OK or NG OK >> Limit switch circuit is OK. NG >> GO TO 2
2. CHECK LIMIT SWITCH GROUND CIRCUIT Turn ignition switch OFF. Disconnect front power window regulator (passenger side) connector. Check continuity between front power window regulator (passenger side) connector D37 terminal 3 and ground. 3 (B) - Ground : Continuity should exist. OK or NG OK >> GO TO 3. NG >> Repair or replace harness.
3. CHECK HARNESS CONTINUITY Disconnect passenger door control unit connector. Check continuity between passenger door control unit connector D38 terminal 1 and front power window regulator (passenger side) connector D37 terminal 4. 1 (PU) - 4 (PU) : Continuity should exist. Check continuity between passenger door control unit connector D38 terminal 1 and ground. 1 (PU) - Ground : Continuity should not exist. OK or NG OK >> GO TO 4. NG >> Repair or replace harness between passenger door control unit and front power window regulator (passenger side).
4. CHECK PASSENGER DOOR CONTROL UNIT OUTPUT SIGNAL Connect passenger door control unit connector. Turn ignition switch ON. Check voltage between passenger door control unit connector D38 terminal 1 and ground. 1 (PU) - Ground : Approx. 5V OK or NG OK >> Replace front power window regulator (passenger side). NG >> Replace passenger door control unit.

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1. CHECK FRONT POWER WINDOW REGULATOR (DRIVER SIDE) POWER SUPPLY Turn ignition switch ON. Check voltage between driver door control unit (LCU01) connector D8 terminal 4 and ground. 4 (W) - Ground : Approx. 10V OK or NG OK >> GO TO 2. NG >> Replace driver door control unit (LCU01).
2. CHECK HARNESS CONTINUITY Turn ignition switch OFF. Disconnect driver door control unit (LCU01) and front power window regulator (driver side) connector. Check continuity between driver door control unit (LCU01) connector D8 terminal 4 and front power window regulator (driver side) connector D7 terminal 5. 4 (W) - 5 (W) : Continuity should exist. OK or NG OK >> GO TO 3. NG >> Repair or replace harness between driver door control unit (LCU01) and front power window regulator (driver side).
3. CHECK ENCODER GROUND Check continuity between front power window regulator (driver side) connector D7 terminal 3 and ground. 3 (B) - Ground : Continuity should exist. OK or NG OK >> GO TO 4. NG >> Repair or replace harness.
4. CHECK ENCODER SIGNAL Connect driver door control unit (LCU01) and front power window regulator (driver side) connector. Turn ignition switch ON. Check the signal between driver door control unit (LCU01) connector and ground with oscilloscope. OK or NG OK >> Encoder switch circuit is OK. NG >> GO TO 5
5. CHECK ENCODER CIRCUIT Turn ignition switch OFF. Disconnect driver door control unit (LCU01) and front power window regulator (driver side) connector. Check continuity between driver door control unit (LCU01) connector D8 terminal 1 and front power window regulator (driver side) connector D7 terminal 6. 1 (G) - 6 (G) : Continuity should exist. Check continuity between driver door control unit (LCU01) connector D8 terminal 1 and ground. 1 (G) - Ground : Continuity should not exist. OK or NG OK >> Replace front power window regulator (driver side) NG >> Repair or replace harness between driver door control unit (LCU01) and front power window regulator (driver side).

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1. CHECK FRONT POWER WINDOW REGULATOR (PASSENGER SIDE) POWER SUPPLY Turn ignition switch ON. Check voltage between passenger door control unit connector D38 terminal 4 and ground. 4 (W) - Ground : Approx. 10V OK or NG OK >> GO TO 2. NG >> Replace passenger door control unit.
2. CHECK HARNESS CONTINUITY Turn ignition switch OFF. Disconnect passenger door control unit and front power window regulator (passenger side) connector. Check continuity between driver door control unit (LCU01) connector D38 terminal 4 and front power window regulator (passenger side) connector D37 terminal 5. 4 (W) - 5 (W) : Continuity should exist. OK or NG OK >> GO TO 3. NG >> Repair or replace harness between passenger door control unit and front power window regulator (passenger side).
3. CHECK ENCODER GROUND Check continuity between front power window regulator (passenger side) connector D37 terminal 3 and ground. 3 (B) - Ground : Continuity should exist. OK or NG OK >> GO TO 4. NG >> Repair or replace harness.
4. CHECK ENCODER SIGNAL Connect passenger door control unit and front power window regulator (passenger side) connector. Turn ignition switch ON. Check the signal between passenger door control unit connector and ground with oscilloscope. OK or NG OK >> Encoder switch circuit is OK. NG >> GO TO 5.
5. CHECK ENCODER CIRCUIT Turn ignition switch OFF. Disconnect passenger door control unit and front power window regulator (passenger side) connector. Check continuity between passenger door control unit connector D38 terminal 12 and front power window regulator (passenger side) connector D37 terminal 6. 12 (G) - 6 (G) : Continuity should exist. Check continuity between passenger door control unit connector D38 terminal 12 and ground. 12 (G) - Ground : Continuity should not exist. OK or NG OK >> Replace front power window regulator (passenger side) NG >> Repair or replace harness between passenger door control unit and front power window regulator (passenger side).

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1. CHECK POWER SUPPLY CIRCUIT Turn ignition switch OFF. Disconnect driver door control unit (LCU01) connector. Check voltage between driver door control unit (LCU01) connector D8 terminal 14 and ground. 14 (Y/G) - Ground : Battery voltage OK or NG OK >> GO TO 2. NG >> Check the following. 40A fusible link (letter H. located in fuse and fusible link box). Harness for open or short between driver control unit (LCU01) and fuse.
2. CHECK GROUND CIRCUIT Check continuity between driver door control unit (LCU01) connector D8 terminal 15 and ground. 15 (B) - Ground : Continuity should exist. OK or NG OK >> INSPECTION END NG >> Repair or replace harness.

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1. CHECK POWER SUPPLY CIRCUIT Turn ignition switch OFF. Disconnect passenger door control unit connector. Check voltage between passenger door control unit connector D38 terminal 10 and ground. 10 (W/R) - Ground : Battery voltage OK or NG OK >> GO TO 2. NG >> Check the following. 40A fusible link (letter H, located in fuse and fusible link box). Harness for open or short between passenger control unit and fuse.
2. CHECK GROUND CIRCUIT Check continuity between passenger door control unit connector D38 terminal 11 and ground. 11 (B) - Ground : Continuity should exist. OK or NG OK >> INSPECTION END NG >> Repair or replace harness.

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1. CHECK POWER SUPPLY CIRCUIT Turn ignition switch OFF. Disconnect rear door control unit connector. Check voltage between rear door control unit LH or RH connector D58 or D78 terminal 10 and ground. 10 (Y/B) - Ground : Battery voltage OK or NG OK >> GO TO 2. NG >> Check the following. 40A fusible link (letter H, located in fuse and fusible link box). Harness for open or short between rear control unit LH or RH and fuse.
2. CHECK GROUND CIRCUIT Check continuity between rear door control unit LH or RH connector D58 or D78 terminal 11 and ground. 11 (B) - Ground : Continuity should exist. OK or NG OK >> INSPECTION END NG >> Repair or replace harness.

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1. CHECK DOOR SWITCH INPUT SIGNAL With CONSULT-II Check door switch in "DATE MONITOR" mode with CONSULT-II. When door is opened : DOOR SW ON When door is closed : DOOR SW OFF Without CONSULT-II Check all door switches in switch monitor mode. Refer to Remote keyless entry system "SWITCH MONITOR " OK or NG OK >> Door switch is OK. NG >> GO TO 2.
2. CHECK DOOR SWITCH Turn ignition switch OFF. Disconnect door switch connector. Check continuity between following terminals and ground. OK or NG OK >> Check harness for open and short between door switch and BCM. NG >> Check door switch ground condition.

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1. CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL Check voltage between driver door control unit (LCU01) connector and ground. OK or NG OK >> Further inspection is necessary. Refer to symptom chart. NG >> GO TO 2.
2. CHECK DOOR KEY CYLINDER SWITCH CIRCUIT Turn ignition switch OFF. Disconnect driver door control unit (LCU01) and front door key cylinder switch connector. Check continuity between driver door control unit (LCU01) connector D8 terminal 9, 10 and front door key cylinder switch connector D12 terminals 1, 3. 9 (PU/W) - 1 (PU/W) : Continuity should exist. 10 (GY) - 3 (GY) : Continuity should exist. OK or NG OK >> GO TO 3. NG >> Repair or replace harness between driver door control unit (LCU01) and front door key cylinder switch.
3. CHECK DOOR KEY CYLINDER SWITCH GROUND Check continuity between front door key cylinder switch connector D12 terminal 2 and ground. 2 (B) - Ground : Continuity should exist. OK or NG OK >> GO TO 4. NG >> Repair or replace harness.
4. CHECK DOOR KEY CYLINDER SWITCH Check continuity between front door key cylinder switch terminal 1, 3 and 2. OK or NG OK >> Check the condition of the harness and the connector. NG >> Replace door key cylinder switch.