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REAR WINDOW DEFOGGER GW-73
C
D E
F
G H
J
K L
M A
B
GW
Revision: 2006 December 2006 FX35/FX45
TIWM1688E
Page 3314 of 4462

GW-74
REAR WINDOW DEFOGGER
Revision: 2006 December 2006 FX35/FX45
Terminal and Reference Value for BCMNIS001S6
Terminal and Reference Value for IPDM E/RNIS001S7
Terminal Wire
color Item Signal
Input/
Output Condition
Voltage (V)
(Approx.)
9L/W Rear window defogger
switch signal Input When rear window defogger switch is
pressed. 0
When rear window defogger switch is OFF. 5
38 W/L Ignition switch ON or START Input Ignition switch (ON or START position) Battery voltage
39 L CAN − H Input/
Output ——
40 P CAN − L Input/
Output ——
42 L/R Power source (Fuse) Input — Battery voltage
49 B Ground (signal) — — 0
52 B Ground (power) — — 0
55 G Power source (Fusible link) Input — Battery voltage
Terminal Wire
color Item Signal
Input/
Output Condition
Voltage (V)
(Approx.)
5 R Battery power supply Output — Battery voltage
6 W Battery power supply Output — Battery voltage
38 B Ground (Power) — — 0
48 L CAN − H Input/
Output ——
49 R CAN − L Input/
Output ——
52 G Rear window defogger relay
control signal Input When rear window defogger switch is ON. 0
When rear window defogger switch is
OFF. Battery voltage
60 B Ground (Signal) — — 0
Page 3315 of 4462
REAR WINDOW DEFOGGER GW-75
C
D E
F
G H
J
K L
M A
B
GW
Revision: 2006 December 2006 FX35/FX45
CONSULT-II Function (BCM)NIS001S8
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II OPERATION
Refer to GI-38, "CONSULT-II Start Procedure" .
DATA MONITOR
Display Item List
ACTIVE TEST
Display Item List
BCM diagnostic test item Check item diagnostic test mode Content
REAR DEFOGGER Data monitor Displays the input data of BCM in real time.
Active test Gives a drive signal to a load to check the operation.
Monitor item Content
REAR DEF SW Displays “Press (ON)/others (OFF)” status determined with the rear window defogger switch.
IGN ON SW Displays “IGN (ON)/OFF” status determined with the ignition switch signal.
Test item Content
REAR DEFOGGER Gives a drive signal to the rear window defogger relay to activate it.
Page 3316 of 4462

GW-76
REAR WINDOW DEFOGGER
Revision: 2006 December 2006 FX35/FX45
Work FlowNIS001S9
1. Check the symptom and customer's requests.
2. Understand the outline of system. Refer to GW-67, "
System Description" .
3. According to the trouble diagnosis chart, repair or replace the cause of the malfunction. Refer to GW-76,
"Trouble Diagnoses Symptom Chart" .
4. Does rear window defogger operate normally? YES: GO TO 5, NO: GO TO 3.
5. INSPECTION END.
Trouble Diagnoses Symptom ChartNIS001SA
Make sure other systems using the signal of the following systems operate normally.
Symptom Diagnoses / Service procedure Refer to page
Rear window defogger and door mirror defogger do not
operate. 1. Check BCM power supply and ground circuit
GW-77
2. Check IPDM E/R auto active test PG-21
3. Check rear window defogger switch circuit GW-78
4. Check rear window defogger power supply circuit GW-79
5. Replace IPDM E/ R PG-28
Rear window defogger does not operate but both of door
mirror defogger operate. 1. Check rear window defogger circuit
GW-81
2. Check filament GW-87
Door mirror defogger does not operated but both of rear
window defogger operate. 1. Check door mirror defogger power supply circuit
GW-82
Driver side door mirror defogger does not operate. 1. Check driver side door mirror defogger circuit GW-84
Passenger side door mirror defogger does not operate. 1. Check passenger side door mirror defogger circuit GW-85
Rear window defogger switch does not light, and rear win-
dow defogger is not displayed on the display.
But rear window defogger operates. 1. Check rear window defogger signal
GW-85
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REAR WINDOW DEFOGGER GW-77
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Revision: 2006 December 2006 FX35/FX45
Check BCM Power Supply and Ground Circuit NIS001SB
First perform the “SELF-DIAG RESULTS” in “BCM” with CONSULT-II, when perform the each trouble
diagnosis. Refer to BCS-14, "
CAN Communication Inspection Using CONSULT-II (Self-Diagnosis)" .
1. CHECK FUSE
Check 15A fuse [No.1, located in the fuse block (J/B)]
Check 15A fuse [No.22, located in the fuse block (J/B)]
Check 50A fusible link (letter M located in the fuse and fusible link box).
NOTE:
Refer to GW-67, "
Component Parts and Harness Connector Location" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown out, be sure to eliminate cause of malfunction before installing new fuse. Refer to PG-3, "
POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between BCM connector M3, M4 terminal 38, 42, 55 and ground.
OK or NG
OK >> GO TO 3.
NG >> Check BCM power supply circuit for open or short.
3. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check continuity between BCM connector M4 terminal 49, 52 and ground.
OK or NG
OK >> Power supply and ground circuit are OK.
NG >> Check BCM ground circuit for open or short. 38 (W/L) – Ground : Battery voltage
42 (L/R) – Ground : Battery voltage
55 (G) – Ground : Battery voltage
PIIA6160E
49 (B) – Ground : Continuity should exist.
52 (B) – Ground : Continuity should exist.
PIIA6161E
Page 3318 of 4462

GW-78
REAR WINDOW DEFOGGER
Revision: 2006 December 2006 FX35/FX45
Check Rear Window Defogger Switch Circuit NIS001SC
1. CHECK REAR WINDOW DEFOGGER SWITCH OPERATION
With CONSULT-II
Check (“REAR DEF SW”, “IGN ON SW”) in DATA MONITOR mode with CONSULT-II.
Without CONSULT-II
1. Turn ignition switch ON.
2. Check voltage between BCM connector ground.
OK or NG
OK >> Rear window defogger switch is OK.
NG >> GO TO 2.
2. CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect BCM and A/C and AV switch connector.
3. Check continuity between BCM connector M3 terminal 9 and A/ C and AV switch connector M64 terminal 16.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness. When rear window defogger switch is turned to ON
REAR DEF SW : ON
When ignition switch is turned to ON
IGN ON SW : ON
PIIA2373E
Connector Terminal (Wire color)
Condition Voltage (V)
(Approx.)
(+) (–)
M3 9 (L/W) Ground Rear window defogger
switch is pressed. 0
Rear window defogger
switch is OFF. 5
PIIA6208E
9 (L/W) – 16 (L/W) : Continuity should exist.
PIIA6209E
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REAR WINDOW DEFOGGER GW-79
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Revision: 2006 December 2006 FX35/FX45
3. CHECK BCM OUTPUT SIGNAL
1. Connect BCM connector.
2. Turn ignition switch ON.
3. Check voltage between BCM connector M3 terminal 9 and ground.
OK or NG
OK >> Replace A/C and AV switch.
NG >> Replace BCM.
Check rear Window Defogger Power Supply Circuit NIS001SD
1. CHECK FUSE
Check 10A fuse [No.12, located in the fuse block (J/B)]
Check 20A fuse (No.75, located in the IPDM E/R)
Check 20A fuse (No.80, located in the IPDM E/R)
NOTE:
Refer to GW-67, "
Component Parts and Harness Connector Location" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown out, be sure to eliminate cause of malfunction before installing new fuse, refer to
PG-3, "
POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Remove rear window defogger relay.
3. Turn ignition switch ON.
4. Check voltage between rear window defogger relay connector E13 terminals 1, 3, 6 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness. 9 (L/W) – Ground : Approx. 5
PIIA6208E
1 (OR) – Ground : Battery voltage
3 (W) – Ground : Battery voltage
6 (R) – Ground : Battery voltage
PIIA4233E
Page 3320 of 4462

GW-80
REAR WINDOW DEFOGGER
Revision: 2006 December 2006 FX35/FX45
3. CHECK REAR WINDOW DEFOGGER RELAY
Check continuity between rear window defogger terminals 3 and 5, 6
and 7.
OK or NG
OK >> GO TO 4.
NG >> Replace rear window defogger relay.
4. CHECK REAR WINDOW DEFOGGER RELAY GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Installation rear window defogger relay.
3. Turn ignition switch ON.
4. Check voltage between IPDM E/R connector and ground.
OK or NG
OK >> Rear window defogger power supply circuit is OK.
NG >> GO TO 5.
5. CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector and rear window defogger relay.
3. Check continuity between IPDM E/R connector E9 terminal 52 and rear window defogger relay connector E13 terminal 2.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace harness.
Terminal Condition Continuity
35 12V direct current supply
between terminals 1 and 2 Ye s
No current supply No
67 12V direct current supply
between terminals 1 and 2 Ye s
No current supply No
SEC202B
Connector Terminals (Wire color)
Condition Voltage (V)
(Approx.)
(+) (-)
E9 52 (G) Ground When rear window defog-
ger switch ON 0
When rear window defog-
ger switch OFF Battery
voltage
PIIA6210E
52 (G) – 2 (G) : Continuity should exist.
PIIA6211E