Rear Window Defogger: Other Infiniti M45 II

Work Flow

1. Check the symptom and customer's requests.
2. Understand the outline of system. Refer to " «SYSTEM DESCRIPTION»(ref-181225-S22872239222005080200000) ".
3. The preliminary check. Refer to " «PRELIMINARY CHECK»(ref-181225-S40772831462005080200000) ".
4. According to the trouble diagnosis chart, repair or replace the cause of the malfunction. Refer to " «TROUBLE DIAGNOSES SYMPTOM CHART»(ref-181225-S00725376642005080200000) ".
5. Does rear defogger operate normally? OK: GO TO 6. NG: GO TO 4 .
6. Inspection end.

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1. FUSE INSPECTION Check that any of the following fuses in the BCM is blown. NOTE: Refer to " «COMPONENT PARTS AND HARNESS CONNECTOR LOCATION»(ref-181225-S22218529152005080200000) ". OK or NG? OK >> GO TO 2. NG >> If fuse is blown, be sure to eliminate cause of problem before installing new fuse. Refer to "POWER SUPPLY ROUTING ".
2. POWER SUPPLY CIRCUIT INSPECTION (BCM) Turn ignition switch OFF. Disconnect the BCM connector M4, check voltage between connector terminal (refer to the "Chart" below") of the harness connector and ground. OK or NG? OK >> GO TO 3. NG >> Check harness for open and short between BCM and fuse.
3. GROUND CIRCUIT INSPECTION (BCM) Check continuity between BCM connector M4 terminals and ground. 56 (B) - Ground : Continuity should exist. 113 (B) - Ground : Continuity should exist. OK or NG? OK >> System is OK. NG >> Repair or replace harness.

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1. Turn ignition switch "OFF".
2. Connect "CONSULT-II" and CONSULT-II CONVERTER to data link connector.
3. Turn ignition switch "ON".
4. Touch "START (NISSAN BASED VHCL)".
5. Touch "IVMS" on the "SELECT SYSTEM" screen. If IVMS is not indicated, go to "CONSULT-II DATA LINK CONNECTOR (DLC) CIRCUIT ".
6. Check the model specification, and touch either "WITH SUNROOF" or "WITHOUT SUNROOF" on the "SELECT SYSCOND" screen.
7. Touch "OK". If the selection is wrong, touch "CANCEL".
8. Select the desired part to be diagnosed on the "SELECT TEST ITEM" screen.

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

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1. REAR WINDOW DEFOGGER (MULTIFUNCTION) SWITCH INSPECTION With CONSULT-II Check rear window switch "REAR DEF SW" in "DATA MONITOR" mode with CONSULT-II. When rear window defogger switch ON REAE DEF SW : ON With out CONSULT-II Turn ignition switch ON. Check voltage between BCM connector M4 terminal 10(G/R) and ground. OK or NG OK >> Rear window defogger switch check is OK. NG >> GO TO 2
2. REAR WINDOW DEFOGGER SWITCH SIGNAL CIRCUIT INSPECTION Disconnect BCM connector and multifunction switch (rear window defogger with) connector. Check continuity between BCM connector M4 terminal 10(G/R) and multifunction switch (rear defogger switch) connector M83 terminal 5(G/R). 10 (G/R) - 5(G/R) : Continuity should exist Check continuity between BCM harness connector M4 terminal 10(G/R) and ground. 10 (G/R) - ground : Continuity should not exist OK or NG OK >> GO TO 3. NG >> Repair or replace harness between BCM and multifunction switch (rear window defogger switch).
3. MULTIFUNCTION (REAR WINDOW DEFOGGER) SWITCH GROUND HARNESS INSPECTION Check continuity between multifunction (rear window defogger) switch connector M83 terminal 2 (B) and ground. 2 (B) - ground : Continuity should exist OK or NG OK >> Replace multifunction switch. NG >> Repair or replace harness between multifunction (rear window defogger) switch and ground.

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1. CHECK FUSE Turn ignition switch OFF. Check if the following fuse for Fuse block (J/B) is blown. NOTE: Refer to " «COMPONENT PARTS AND HARNESS CONNECTOR LOCATION»(ref-181225-S22218529152005080200000) ". OK or NG OK >> GO TO 2. NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse, refer to "POWER SUPPLY ROUTING ".
2. REAR WINDOW DEFOGGER AND DOOR MIRROR DEFOGGER RELAY POWER SUPPLY CIRCUIT INSPECTION Disconnect rear window defogger and door mirror defogger relay. Turn ignition switch ON. Check voltage between rear window defogger and door mirror defogger relay harness connector B8 terminal 1 (W/G) and ground. 1 (W/G) - Ground : Battery voltage OK or NG OK >> GO TO 3. NG >> Repair or replace harness between fuse block (J/B) and rear window defogger and door mirror defogger relay.
3. REAR WINDOW DEFOGGER AND DOOR MIRROR DEFOGGER RELAY INSPECTION Check continuity between terminals 3 and 5, 6 and 7. OK or NG OK >> GO TO 4. NG >> Replace rear window defogger and door mirror defogger relay.
4. REAR WINDOW DEFOGGER AND DOOR MIRROR DEFOGGER RELAY GROUND HARNESS INSPECTION Turn ignition switch OFF. Installation rear window defogger and door mirror defogger relay. Turn ignition switch ON. Check voltage between BCM connector terminal 144 (G/W) and ground. 144 (G/W) - Ground : Battery voltage OK or NG OK >> Rear window defogger and door mirror defogger circuit is OK. NG >> Repair or replace harness between rear window defogger and door mirror defogger relay and BCM.

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1. REAR WINDOW DEFOGGER POWER SUPPLY CIRCUIT INSPECTION 1 Disconnect rear window defogger connector. Turn ignition switch ON. Push the rear window defogger switch. Check voltage between rear window defogger connector and ground. OK or NG OK >> GO TO 2. NG >> GO TO 3 .
2. REAR WINDOW DEFOGGER GROUND HARNESS INSPECTION Turn ignition switch OFF. Check continuity between rear window defogger connector B421 terminal 1 (B) and ground. 1(B) - ground : Continuity should exist OK or NG OK >> Rear window defogger circuit check is OK. NG >> Repair or replace harness between rear window defogger and ground.
3. REAR WINDOW DEFOGGER GROUND HARNESS INSPECTION 2 Disconnect condenser connector. Turn ignition switch ON. Push the rear window defogger switch. Check voltage between condenser connector and ground. OK or NG OK >> Check the condenser If condenser is OK, repair or replace harness between condenser and rear window defogger. If condenser is NG, replace condenser. NG >> Repair or replace harness between rear window defogger and door mirror defogger relay and condenser.

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1. CHECK FUSE Turn ignition switch OFF. Check if the following fuse for Fuse block (J/B) is blown. NOTE: Refer to " «COMPONENT PARTS AND HARNESS CONNECTOR LOCATION»(ref-181225-S22218529152005080200000) " OK or NG OK >> GO TO 2. NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse, refer to PG- 2, "POWER SUPPLY ROUTING ".
2. DOOR MIRROR DEFOGGER POWER SUPPLY CIRCUIT INSPECTION 1 Disconnect door mirror defogger relay connector. Turn ignition switch ON. push the rear window defogger switch. Check voltage between door mirror defogger relay connector and ground. OK or NG OK >> GO TO 3. NG >> Repair or replace between harness rear window defogger and door mirror defogger relay and door mirror defogger relay.
3. DOOR MIRROR DEFOGGER RELAY INSPECTION Turn ignition switch OFF. Remove door mirror defogger relay. Check continuity between terminals 3 and 5. OK or NG OK >> GO TO 4. NG >> Replace door mirror defogger relay.
4. DOOR MIRROR DEFOGGER RELAY GROUND HARNESS INSPECTION Check continuity between door mirror defogger relay connector B10 terminal 1 (B) and ground. 1 (B) - ground : Continuity should exist OK or NG OK >> GO TO 5. NG >> Repair or replace harness between door mirror defogger relay and ground.
5. DOOR MIRROR DEFOGGER POWER SUPPLY CIRCUIT INSPECTION Check voltage between door mirror defogger relay connector B10 terminal 5 (P/B) and ground. 5 (P/B) - Ground : Battery voltage OK or NG OK >> Check the harness for open or short between door mirror defogger relay and door mirror. NG >> Repair or replace harness between fuse block (J/B) No.1 and door mirror defogger relay.

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1. DOOR MIRROR DEFOGGER POWER SUPPLY CIRCUIT INSPECTION Turn ignition switch OFF. Disconnect door mirror defogger connector. Check voltage between driver side door mirror defogger connector and ground. OK or NG OK >> GO TO 2. NG >> Repair or replace harness between door mirror defogger relay and driver side door mirror (Door mirror defogger).
2. DOOR MIRROR DEFOGGER GROUND HARNESS INSPECTION Turn ignition switch OFF. Check continuity between driver side door mirror defogger connector D2 terminal 5 (B) and ground. 5 (B) - Ground : Continuity should exist. OK or NG OK >> Check the following, if it is OK, replace driver side door mirror glass. Door mirror defogger firmament continuity check. Check the harness for open or short between door mirror defogger relay and door mirror. NG >> Repair or replace harness between driver side door mirror (Door mirror defogger) and ground.

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1. DOOR MIRROR DEFOGGER POWER SUPPLY CIRCUIT INSPECTION Turn ignition switch OFF. Disconnect passenger side door mirror defogger connector. Check voltage between passenger side door mirror defogger connector and body ground. OK or NG OK >> GO TO 2. NG >> Repair or replace harness between door mirror defogger relay and passenger side door mirror (door mirror defogger).
2. DOOR MIRROR DEFOGGER GROUND HARNESS INSPECTION Turn ignition switch OFF. Check continuity between passenger side door mirror defogger connector D32 terminal 5 (B) and body ground. 5 (B) - Ground : Continuity should exist. OK or NG OK >> Check the following, if it is OK, replace passenger side door mirror glass. Door mirror defogger firmament continuity check. Check the harness for open or short between door mirror defogger relay and door mirror. NG >> Repair or replace harness between passenger side door mirror defogger and ground.

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1. When measuring voltage, wrap tin foil around the top of the negative probe. Then press the foil against the wire with your finder.
2. Attach probe circuit tester (in Volt range) to middle portion of each filament.
3. If a filament is burned out, circuit tester registers 0 or battery voltage.
4. To locate burned out point, move probe to left and right along filament. Test needle will swing abruptly when probe passes the point.

REPAIR EQUIPMENT

1. Conductive silver composition (Dupont No.4817 or equivalent)
2. Ruler 30 cm(11.8in) long
3. Drawing pen
4. Heat gun
5. Alcohol
6. Cloth

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1. Wipe broken heat wire and its surrounding area clean with a cloth dampened alcohol.
2. Apply a small amount of conductive silver composition to tip of drawing pen. Shake silver composition container before use.
3. Place ruler on glass along broken line. Deposit conductive silver composition on break with drawing pen. Slightly overlap existing heat wire on both sides [preferably 5 mm(0.20in)] of the break.
4. After repair has been completed, check repaired wire for continuity. This check should be conducted 10 minutes after silver composition is deposited. Do not touch repaired area while test is being conducted.
5. Apply a constant stream of hot air directly to the repaired area for approximately 20 minutes with a heat gun. A minimum distance of 3cm (1.2in) should be kept between repaired area and hot air outlet. If a heat gun is not available, let the repaired area dry for 24 hours.