REAR WINDOW DEFOGGER
GW-57
C
D
E
F
G
H
J
K
L
MA
B
GW
Revision: 2006 November2007 350Z
Ground is supplied
to BCM terminal 52
through body grounds M30, and M66.
to unified meter and A/C amp. terminal 29 and 30
through body grounds M30 and M66.
to internal CPU of IPDM E/R terminal 38 and 60
through body grounds E17, E43, B102 (with VDC system or navigation system) and F152 (without VDC
system and navigation system).
When A/C controller (rear window defogger switch) is turned ON,
Rear window defogger switch signals are transmitted,
through A/C controller terminal 87
to unified meter and A/C amp.
Then ground is supplied
to BCM terminal 9
through unified meter and A/C amp. terminal 38
through unified meter and A/C amp. terminal 30
through body grounds M30 and M66.
Then BCM recognizes that rear window defogger switch is turned ON.
Then it sends rear window defogger switch signals to IPDM E/R via DATA LINE (CAN H, CAN L).
When IPDM E/R receives rear window defogger switch signals,
Ground is supplied
to rear window defogger relay terminal 2
through IPDM E/R terminal 52
through internal CPU of IPDM E/R
through IPDM E/R terminal 60
through body grounds E17, E43, B102 (with VDC system or navigation system), F152 (without VDC sys-
tem and navigation system), and then rear window defogger relay is energized.
When rear window defogger relay is turned ON,
Signals are transmitted
to rear window defogger terminal 1
through rear window defogger relay terminals 5 and 7 (For Coupe)
through rear window defogger relay terminal 5. (For Roadster)
Rear window defogger terminal 2 is grounded through body ground D212. (For Coupe)
Rear window defogger terminal 2 is grounded through body ground B5, B6 and T14. (For Roadster)
With power and ground supplied, rear window defogger filaments heat and defog the rear window.
When rear window defogger relay is turned ON,
Power is supplied
through rear window defogger relay terminals 5 and 7 (For Coupe)
through rear window defogger relay terminal 7 (For Roadster)
through fuse block (J/B) terminal 2C
through 10A fuse [No. 8, located in the fuse block (J/B)]
through fuse block (J/B) terminal 5B
to door mirror defogger (Driver side and passenger side) terminal 2.
Door mirror defogger (Driver side and passenger side) terminal 1 is grounded through body grounds M30 and
M66.
With power and ground supplied, door mirror defogger filaments heat and defog the mirror.
When rear window defogger relay is turned ON,
Power is supplied
through rear window defogger relay terminals 5 and 7 (For Coupe)
through rear window defogger relay terminal 5. (For Roadster)
to unified meter and A/C amp. terminal 56
Then ground is supplied
GW-70
REAR WINDOW DEFOGGER
Revision: 2006 November2007 350Z
Check IPDM E/R OperationNIS0005R
1. CHECK IPDM E/R OPERATION
With CONSULT-III
Check IPDM E/R “REAR DEFOGGER” in “ACTIVE TEST” mode with CONSULT-III.
Refer to GW-68, "
ACTIVE TEST" .
YES or NO
YES >> GO TO diagnosis/service procedure 3 in “Trouble Diagnosis Symptom Chart”. Refer to GW-69 .
NO >> GO TO diagnosis/service procedure 4 in “Trouble Diagnosis Symptom Chart”. Refer to GW-69
.
Check Rear Window Defogger Switch CircuitNIS0005S
1. CHECK REAR WINDOW DEFOGGER SWITCH OPERATION
With CONSULT-III
Check (“REAR DEF SW” and “IGN ON SW”) in DATA MONITOR mode with CONSULT-III. Refer to GW-68,
"DATA MONITOR" .
With out CONSULT-III
1. Turn ignition switch ON.
2. Check voltage between BCM connector ground.
OK or NG
OK >> Rear window defogger switch check is OK.
NG >> GO TO 2.
2. REAR WINDOW DEFOGGER SWITCH SIGNAL CIRCUIT HARNESS CONTINUITY INSPECTION
1. Turn ignition switch OFF.
2. Disconnect BCM connector and unified meter and A/C amp.connector.
3. Check continuity between BCM connector M90 terminal 9 and unified meter and A/C amp. connector M50
terminal 38.
4. Check continuity between BCM harness connector M90 terminal
9 and ground
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.When “ACTIVE TEST” is performed, does rear defogger switch indicator illuminate?
When rear defogger switch is turned to ON
REAR DEF SW :ON
When ignition switch is turned to ON
IGN ON SW :ON
ConnectorTerminal (Wire color)
ConditionVoltage (V)
(Approx.)
(+) (–)
M90 9 (L/R) GroundRear window
defogger switch: ON 0
: OFF 5
PIIA6208E
9 (L/R) – 38 (L/R) : Continuity should exist
9 (L/R) – Ground : Continuity should not exist
PIIB0806E
REAR WINDOW DEFOGGER
GW-71
C
D
E
F
G
H
J
K
L
MA
B
GW
Revision: 2006 November2007 350Z
3. CHECK BCM OUTPUT SIGNAL
1. Connect BCM connector.
2. Turn ignition switch ON.
3. Check voltage between BCM connector M90 terminal 9 and
ground.
OK or NG
OK >> Replace unified meter and A/C amp.
NG >> Replace BCM.
Check Rear Window Defogger Power Supply CircuitNIS0005T
1. CHECK FUSE
Check 10A fuse [No. 12, located in fuse block (J/B)].
NOTE:
Refer to GW-56, "
Component Parts and Harness Connector Location" .
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-
4, "POWER SUPPLY ROUTING CIRCUIT" .
2. REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT INSPECTION
1. Turn ignition switch OFF.
2. Remove rear window defogger relay.
3. Check voltage between rear window defogger relay connector
B34 terminal 1 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.9 (L/R) – Ground :Approx. 5V
PIIA6208E
1 (G/R) – Ground : Battery voltage
PIIA2377E
