air condition INFINITI QX56 2004 Factory Service Manual

WT-18
TROUBLE DIAGNOSES
Revision: August 20072004 QX56
Data Monitor Mode
NOTE:
Before performing the self-diagnosis, be sure to register the ID, or the actual malfunction location may be different from that displayed on
CONSULT-II.MONITOR CONDITION SPECIFICATION
VHCL SPEED Drive vehicle. Vehicle speed (km/h or MPH)
AIR PRESS FL
AIR PRESS FR
AIR PRESS RR
AIR PRESS RL

Drive vehicle for a few minutes.
Tire pressure (kPa or psi) or

Ignition switch ON and activation tool
is transmitting activation signals.
ID REGST FL1
ID REGST FR1
ID REGST RR1
ID REGST RL1
Ignition switch ONRegistration ID: DONE
No registration ID: YET
WAR NIN G LAMPLow tire pressure warning lamp on: ON
Low tire pressure warning lamp off: OFF
BUZZERBuzzer in combination meter on: ON
Buzzer in combination meter off : OFF

FRONT WIPER AND WASHER SYSTEM
WW-13
C
D
E
F
G
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L
MA
B
WW
Revision: August 20072004 QX56
Terminals and Reference Values for IPDM E/R EKS007FB
Work FlowEKS007FC
1. Confirm the symptom or customer complaint.
2. Understand the system description, refer to WW-4, "
System Description" .
3. Perform preliminary inspection, refer to WW-13, "
Preliminary Inspection" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does wiper function operate normally? If it operates normally, GO TO 6. If not, GO TO 4.
6. Inspection End.
Preliminary InspectionEKS007FD
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
Inspection procedure
1. CHECK FUSE
Check if wiper or washer fuse is blown.
35 O/B Combination switch output 2
ON

Light switch and wiper switch OFF

Wiper dial position 4
36 R/W Combination switch output 1
38 W/L Ignition switch (ON) ON — Battery voltage
39 W CAN-H ON — —
40 R CAN-L ON — —
67 B Ground — — 0V
70 W/B Battery power OFF — Battery voltage Te r m i n a l
No.Wire
colorSignal nameMeasuring condition
Reference Value (V)
(Approx.) Igni-
tion
switchOperation or condition
SKIA5292E
Te r m i n a l
No.Wire
colorSignal nameMeasuring condition
Reference value (V)
(Approx.) Ignition
switchOperation or condition
32 L Low speed signal ON Wiper switchOFF 0V
LO Battery voltage
35 L/B High speed signal ON Wiper switchOFF 0V
HI Battery voltage
43 L/Y Wiper auto stop signal ONWiper operating Battery voltage
Wiper stopped 0V
38 B Ground — — 0V
39 W CAN-H ON — —
40 R CAN-L ON — —
59 B Ground — — 0V
Unit Power source Fuse and fusible link No.
Front and rear washer motor Ignition switch ON or START 9
Front wiper relay Battery 39

WW-14
FRONT WIPER AND WASHER SYSTEM
Revision: August 20072004 QX56
OK or NG
OK >> GO TO 2.
NG >> If fuse or fusible link is blown, be sure to eliminate cause of malfunction before installing new fuse
or fusible link. Refer to PG-4, "
POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect BCM connectors.
2. Check voltage between BCM harness connector terminals and
ground.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between BCM and fuse or fusible link.
3. GROUND CIRCUIT INSPECTION (BCM)
Check for continuity between BCM terminal and ground.
OK or NG
OK >> Inspection End.
NG >> Repair/replace BCM ground circuit.
BCMIgnition switch ON or START 59
Batteryf Unit Power source Fuse and fusible link No.
BCM
(–)Ignition switch position
(+)
OFF ON
ConnectorTe r m i n a l
(wire color)
M18 38 (W/L)
Ground0V
Battery voltage
M20 70 (W/B) Battery voltage
WKIA2089E
BCM
Ignition switch
conditionContinuity
ConnectorTe r m i n a l
(wire color)
M20 67 (B) Ground OFF Yes
WKIA2090E

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FRONT WIPER AND WASHER SYSTEM
Revision: August 20072004 QX56
2. IPDM E/R TO FRONT WIPER MOTOR CIRCUIT INSPECTION
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector and front wiper motor connector.
3. Check continuity between IPDM E/R harness connector terminal
and front wiper motor harness connector terminal.
4. Check continuity between IPDM E/R harness connector terminal
and ground.
OK or NG
OK >> Connect connectors. GO TO 3.
NG >> Repair harness or connector.
3. IPDM E/R TO FRONT WIPER MOTOR AUTO STOP CIRCUIT INSPECTION
1. Turn ignition switch ON.
2. While front wiper motor is stopped and while operating, measure
voltage between IPDM E/R terminal 43 and ground.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-29, "Removal and
Installation of IPDM E/R" .
NG >> Replace front wiper motor. Refer to WW-29, "
Removal and Installation of Wiper Motor and Link-
age" .
IPDM E/R Front wiper motor
Continuity
ConnectorTe r m i n a l
(wire color)ConnectorTe r m i n a l
(wire color)
E122 43 (L/Y) E23 6 (L/Y) Yes
WKIA2084E
IPDM E/R
Continuity
Connector Terminal (wire color)
E122 43 (L/Y) Ground No
WKIA2088E
IPDM E/R
(–) ConditionVoltag e
(Approx.) (+)
ConnectorTe r m i n a l
(wire color)
E122 43 (L/Y) GroundWiper operating Fluctuating
Wiper stopped 0V
WKIA2085E

REAR WIPER AND WASHER SYSTEM
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D
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MA
B
WW
Revision: August 20072004 QX56
How to Proceed With Trouble DiagnosisEKS007FS
1. Confirm the symptoms and customer complaint.
2. Understand operation description and function description. Refer to WW-33, "
System Description" .
3. Perform the Preliminary Check. Refer to WW-41, "
Preliminary Inspection" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does the rear wiper operate normally? If YES: GO TO 6. If NO: GO TO 4.
6. Inspection End.
Preliminary InspectionEKS007FT
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
Inspection procedure
1. CHECK FUSE
Check if wiper or washer fuse is blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse or fusible link is blown, be sure to eliminate cause of malfunction before installing new fuse
or fusible link. Refer to PG-4, "
POWER SUPPLY ROUTING CIRCUIT" .
55 SB Rear wiper output circuit 1 ONRise up position (rear wiper arm on
stopper)0V (except battery voltage at ini-
tial rear wiper ON to lift arm off
stop)
A Position (full clockwise stop
position)Battery voltage
Forward sweep (counterclockwise
direction)Battery voltage
B Position (full counterclockwise stop
position)0V
Reverse sweep (clockwise direction) 0V
67 B Ground ON — 0V
70 W/B Battery power OFF — Battery voltage Te r m i -
nal No.Wire
colorSignal nameMeasuring condition
Reference Value (V)
(Approx.) Ignition
switchOperation or condition
Unit Power source Fuse and fusible link No.
Front and rear washer motor Ignition ON or START 9
BCMIgnition ON or START 59
Batteryf

WW-42
REAR WIPER AND WASHER SYSTEM
Revision: August 20072004 QX56
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect BCM connectors.
2. Check voltage between BCM harness connector terminals and
ground.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between BCM and fuse or fusible link.
3. GROUND CIRCUIT INSPECTION (BCM)
Check for continuity between the BCM terminal and ground.
OK or NG
OK >> Inspection End.
NG >> Repair/replace BCM ground circuit.
BCM
(–)Ignition switch position
(+)
OFF ON
ConnectorTe r m i n a l
(Wire color)
M18 38 (W/L)
Ground0V Battery voltage
M20 70 (W/B) Battery voltage Battery voltage
WKIA2089E
BCM
Ignition switch
conditionContinuity
ConnectorTe r m i n a l
(wire color)
M20 67 (B) Ground OFF Yes
WKIA2090E

WW-46
REAR WIPER AND WASHER SYSTEM
Revision: August 20072004 QX56
4. CHECK REAR WIPER MOTOR AUTO STOP CIRCUITS
1. Disconnect BCM connector M18.
2. Check continuity between BCM harness connector terminals
and rear wiper motor harness connector terminals.
OK or NO
OK >> GO TO 5.
NO >> Repair harness or connector.
5. CHECK REAR WIPER MOTOR AUTO STOP SWITCH GROUNDS
Check continuity between rear wiper motor harness connector D704
terminals and ground.
OK or NG
OK >> GO TO 6.
NG >> Repair harness or connector.
6. CHECK REAR WIPER OPERATING
1. Connect BCM connectors and rear wiper motor connector.
2. Turn ignition switch ON.
3. Select “RR WIPER” during "ACTIVE TEST". Refer to WW-44,
"ACTIVE TEST" . When rear wiper is operating, check voltage
between BCM connector terminals.
OK or NG
OK >> Replace rear wiper motor. Refer to WW-51, "Removal and Installation of Rear Wiper Motor" .
NG >> Replace BCM. Refer to BCS-19, "
Removal and Installation of BCM" .
BCM Rear wiper motor
Continuity
ConnectorTe r m i n a l
(wire color)ConnectorTe r m i n a l
(wire color)
M18 26 (Y/L)
D7041 (Y/L)
Ye s
M19 44 (O) 2 (O)
WKIA2093E
Rear wiper motor
Continuity
ConnectorTe r m i n a l
(wire color)
D7043 (B)
Ground Yes
5 (B)
WKIA2094E
BCM
(–) ConditionVoltage
(Approx.) (+)
ConnectorTerminal
(wire color)
M1954 (Y)
GroundOperating Fluctuating
55 (SB)End of travel
(stopped)0V
WKIA2095E