display INFINITI QX56 2009 Factory Service Manual

PCS-4
< BASIC INSPECTION >[IPDM E/R]
DIAGNOSIS AND REPAIR WORKFLOW
8. DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE
Inspect according to Diagnostic Procedure of the system.
NOTE:
The Diagnostic Procedure described based on open circuit inspection. A short circuit inspection is also
required for the circuit check in the Diagnostic Procedure.
Is malfunctioning part detected?
YES >> GO TO 9
NO >> Check voltage of related BCM terminals using CONSULT-III.
9. REPAIR OR REPLACE THE MALFUNCTIONING PART
1. Repair or replace the malfunctioning part.
2. Reconnect parts or connectors disconnected during Diagnostic Procedure again after repair and replace- ment.
3. Check DTC. If DTC is displayed, erase it.
>> GO TO 10
10. FINAL CHECK
When DTC was detected in step 2, perform DTC Confirmation Procedure or Component Function Check
again, and then check that the malfunction have been fully repaired.
When symptom was described from the customer, refer to confirmed symptom in step 3 or 4 and check that
the symptom is not detected.
OK or NG
NG (DTC is detected)>>GO TO 8
NG (Symptom remains)>>GO TO 6
OK >> Inspection End
Revision: December 20092009 QX56

PCS-14
< FUNCTION DIAGNOSIS >[IPDM E/R]
DIAGNOSIS SYSTEM (IPDM E/R)
CONSULT - III Func tion (IPDM E/R)
INFOID:0000000003776497
APPLICATION ITEM
CONSULT-III performs the following functi ons via CAN communication with IPDM E/R.
SELF DIAGNOSTIC
Refer to PCS-31, "DTCIndex".
DATA MONITOR
Monitor item
Any of the following components do not operate
• Front wipers
•Tail lamps
• License plate lamps
• Parking lamps
•Front fog lamps
• Headlamps (Hi, Lo) Perform auto active test.
Does the applicable system
operate?YES BCM signal input system
NO • Lamp or front wiper motor
malfunction
• Lamp or front wiper motor ground circuit
• Harness or connector be-
tween IPDM E/R and appli-
cable system
• IPDM E/R (integrated relay
malfunction)
A/C compressor does not operate Perform auto active test.
Does the A/C compressor op-
erate?YES
• BCM signal input circuit
• CAN communication signal
between BCM and ECM
• CAN communication signal between ECM and IPDM E/
R
NO • Magnetic clutch malfunction
• Harness or connector be-
tween IPDM E/R and mag-
netic clutch
• IPDM E/R (integrated relay malfunction)
Cooling fan does not operate Perform auto active test.
Does the cooling fan operate?YES
• ECM signal input circuit
• CAN communication signal
between ECM and IPDM E/
R
NO • Cooling fan motor malfunc-
tion
• Harness or connector be- tween IPDM E/R and cool-
ing fan
• IPDM E/R (integrated relay malfunction)
Symptom
Inspection contentsPossible cause
Diagnosis mode Description
ECU Identification Allows confirmation of IPDM E/R part number.
Self Diagnostic Result Displays the diagnosis results judged by IPDM E/R.
Data Monitor Displays the real-time input/output data from IPDM E/R input/output data.
Active Test IPDM E/R can provide a drive signal to electronic components to check their operations.
CAN Diag Support Monitor The results of transmit/receive diagnosis of CAN communication can be read.
Revision: December 20092009 QX56

PCS
DIAGNOSIS SYSTEM (IPDM E/R)PCS-15
< FUNCTION DIAGNOSIS > [IPDM E/R]
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ACTIVE TEST
Te s t i t e m
Monitor Item
[Unit] MAIN SIG-
NALS Description
MOTOR FAN REQ
[1/2/3/4] ×Displays the status of the cooling fan speed request signal received from ECM via
CAN communication.
A/C COMP REQ
[OFF/ON] ×Displays the status of the A/C request signal received from AV control unit via
CAN communication.
TAIL&CLR REQ
[OFF/ON] ×
Displays the status of the position light request signal received from BCM via CAN
communication.
HL LO REQ
[OFF/ON] ×Displays the status of the low beam request signal received from BCM via CAN
communication.
HL HI REQ
[OFF/ON] ×Displays the status of the high beam request signal received from BCM via CAN
communication.
FR FOG REQ
[OFF/ON] ×
Displays the status of the front fog lamp request signal received from BCM via
CAN communication.
FR WIP REQ
[STOP/1LOW/LOW/HI] ×Displays the status of the front wiper request signal received from BCM via CAN
communication.
WIP AUTO STOP
[STOP P/ACT P] ×
Displays the status of the front wiper auto stop signal judged by IPDM E/R.
WIP PROT
[OFF/Block] ×
Displays the status of the front wiper fail-safe operation judged by IPDM E/R.
ST RLY REQ
[OFF/ON] Displays the status of the starter request signal received from ECM via CAN com-
munication.
IGN RLY
[OFF/ON] ×
Displays the status of the ignition relay judged by IPDM E/R.
RR DEF REQ
[OFF/ON] ×
Displays the status of the rear defogger request signal received from AV control
unit via CAN communication.
OIL P SW
[OPEN/CLOSE] Displays the status of the oil pressure switch judged by IPDM E/R.
DTRL REQ
[OFF] Displays the status of the daytime light request signal received from BCM via CAN
communication.
HOOD SW
[OPEN/CLOSE] Displays the status of the hood switch judged by IPDM E/R.
THFT HRN REQ
[OFF/ON] Displays the status of the theft warning horn request signal received from BCM
via CAN communication.
HORN CHIRP
[OFF/ON] Displays the status of the horn reminder signal received from BCM via CAN com-
munication.
Test item
Operation Description
REAR DEFOGGER OFF
OFF
ON Operates rear window defogger relay.
FRONT WIPER OFF
OFF
LO Operates the front wiper relay.
HI Operates the front wiper relay and front wiper high relay.
MOTOR FAN 1O
FF
2O FF
3 Operates the cooling fan relay.
4 Operates the cooling fan relay.
Revision: December 20092009 QX56

PCS
U1000 CAN COMM CIRCUITPCS-17
< COMPONENT DIAGNOSIS > [IPDM E/R]
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COMPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000003776498
Refer to
LAN-4, "System Description".
DTC LogicINFOID:0000000003776499
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
Diagnosis ProcedureINFOID:0000000003776500
1. PERFORM SELF DIAGNOSTIC
1. Turn ignition switch ON and wait for 2 seconds or more.
2. Check “SELF-DIAG RESULTS” of IPDM E/R.
Is
“CAN COMM CIRCUIT” displayed?
YES >> Refer to LAN-5, "CAN Communication Control Circuit".
NO >> Refer to GI-38, "
Intermittent Incident".
DTCCONSULT-III display
description DTC Detection Condit
ion Possible cause
U1000 CAN COMM CIRCUIT When IPDM E/R cannot communicate CAN
communication signal continuously for 2
seconds or more In CAN communication system, any item (or items)
of the following listed below is malfunctioning.
• Receiving (TCM)
• Receiving (ECM)
• Receiving (BCM)
• Receiving (Combination meter)
Revision: December 20092009 QX56

PCS-30
< ECU DIAGNOSIS >[IPDM E/R]
IPDM E/R (INTELLIGENT POWER DI
STRIBUTION MODULE ENGINE ROOM)
If No CAN Communication Is Available With BCM
IGNITION RELAY MALFUNCTION DETECTION FUNCTION
• IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it.
• IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the excitation
coil circuit.
• If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay for 10 minutes to alert the user to the ignition relay malfunction when the ignition switch is turned OFF.
NOTE:
The tail lamp turns OFF when the ignition switch is turned ON.
FRONT WIPER CONTROL
IPDM E/R detects front wiper stop posit ion by a front wiper auto stop signal.
When a front wiper auto stop signal is in the conditions listed below, IPDM E/R stops power supply to wiper
after repeating a front wiper 10 second activation and 20 second stop five times.
NOTE:
This operation status can be confirmed on the IPDM E/R “DATA MONITOR” that displays “Block” for the item
“WIP PROT” while the wiper is stopped.
STARTER MOTOR PROTECTION FUNCTION
IPDM E/R turns OFF the starter control relay to protect the starter motor when the starter control relay remains
active for 90 seconds.
Control part Fail-safe in operation
Cooling fan • Turns ON the cooling fan relay when the ignition switch is turned ON
• Turns OFF the cooling fan relay when the ignition switch is turned OFF
Control part
Fail-safe in operation
Headlamp • Turns ON the headlamp low relay when the ignition switch is turned ON
• Turns OFF the headlamp low relay when the ignition switch is turned OFF
• Headlamp high LH/RH relays OFF
•Parking lamps
• License plate lamps
• Tail lamps • Turns ON the tail lamp relay when the ignition switch is turned ON
• Turns OFF the tail lamp relay when the ignition switch is turned OFF
Front wiper • The status just before activation of fail-safe control is maintained until the ignition
switch is turned OFF while the front wiper is operating at LO or HI speed.
• The wiper is operated at LO speed until the ignition switch is turned OFF if the fail- safe control is activated while the front wipe r is set in the INT mode and the front wiper
motor is operating.
Rear window defogger Rear window defogger relay OFF
A/C compressor A/C relay OFF
Front fog lamps Front fog lamp relay OFF
Ignition switch Ignition relayTail lamp relay
ON ON —
OFF OFF —
Ignition switchFront wiper switch Auto stop signal
ON OFF
Front wiper stop position signal cannot be
input 10 seconds.
ON The signal does not change for 10 seconds.
Revision: December 20092009 QX56

PCS
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PCS-31
< ECU DIAGNOSIS > [IPDM E/R]
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DTC IndexINFOID:0000000003776507
NOTE:
The details of TIME display are as follows.
• CRNT: The malfunctions that are detected now
• 1 - 39: The number is indicated when it is normal at
present and a malfunction was detected in the past. It
increases like 0 → 1 → 2 · · · 38 → 39 after returning to the normal condition whenever IGN OFF → ON. It is
fixed to 39 until the self-diagnosis results are erased if it is over 39. It returns to 0 when a malfunction is
detected again in the process.
CONSULT-III display Fail-safe
TIMENOTERefer to
No DTC is detected.
further testing
may be required. ————
U1000: CAN COMM CIRCUIT ×CRNT 1 – 39 PCS-17
Revision: December 20092009 QX56

PG-44
< COMPONENT DIAGNOSIS >
HARNESS
A3 M6 W/10 : To E10A3 M82 W/2 : Circuit breaker-2
A2 M7 B/5 : Passenger select unlock relay G4 M84 W/16 : To B101
A3 M8 W/16 : To D2 A3 M85 W/3 : Tilt motor assembly
A2 M9 BR/24 : To D1 B3 M86 W/2 : Tilt motor assembly
A3 M10 Y/4 : To E29 B3 M87 B/5 : Rear power vent window relay (open)
A3 M11 B/1 : Parking brake switch B3 M89 B/5 : Rear power vent window relay (close)
C3 M12 GR/6 : Key switch and ignition knob switch B3 M91 W/16 : To E26
D3 M13 BR/2 : Front passenger air bag OFF indicator A2 M92 B/6 : Power liftgate switch
A2 M14 GR/6 : Diode-3 D1 M93 W/24 : Display unit
B3 M15 W/4 : Steering lock solenoid A2 M95 W/6 : Rear power vent window switch
A2 M16 GR/6 : ADP steering switch A2 M96 BR/6 : Pedal adjusting switch
B2 M17 W/8 : Steering angle sensor C2 M98 W/16 : A/C and AV switch assembly
C2 M18 W/40 : BCM (body control module) C3 M99 BR/2 : Foot lamp LH
C2 M19 W/15 : BCM (body control module) F4 M100 BR/2 : Foot lamp RH
C2 M20 B/15 : BCM (body control module) E3 M104 W/4 : Aux jack
C3 M21 W/4 : NATS antenna AMP. F2 M105 Y/2 : Front passenger air bag module
C3 M22 W/16 : Data link connector F2 M106 O/2 : Front passenger air bag module
B1 M23 W/12 : Combination meter F3 M107 B/5 : Front blower relay
C1 M24 W/40 : Combination meter D5 M108 B/6 : Yaw rate/ side/ decel G sensor
F2 M25 B/4 : Remote keyless entry receiver A1 M109 BR/2 : Front tweeter LH
B2 M26 W/6 : Ignition switch D2 M110 BR/2 : Center speaker
B2 M28 W/16 : Combination switch F2 M111 BR/2 : Front tweeter RH
B2 M29 Y/6 : Combination switch (spiral cable) C2 M112 BR/14 : BOSE speaker amp.
B3 M30 GR/8 : Combination switch (spiral cable) C2 M113 BR/23 : BOSE speaker amp.
G4 M31 SMJ : To E152 A2 M116 GR/8 : Sonar system OFF switch
C3 M32 W/4 : In-vehicle sensor A2 M117 GR/8 : Rear sonar system OFF switch
B3 M33 W/32 : Automatic drive position control unit B1 M118 B/2 : Front sonar buzzer
B3 M34 W/16 : Automatic drive position control unit F2 M120 W/4 : Remote keyless entry receiver
C5 M35 Y/28 : Air bag diagnosis sensor unit F4 M122 W/4 : Variable blower control (front)
G4 M36 SMJ : To B149 C3 M123 W/2 : Tire pressure warning check connector
G3 M37 B/1 : Fuse block (J/B) D2 M139 B/2 : Diode-1
G3 M38 B/2 : Fuse block (J/B) D1 M140 B/2 : Diode-2
D3 M39 W/8 : Fuse block (J/B) C2 M141 GR/8 : 4WD shift switch
A3 M40 SMJ : To B69 E1 M142 B/6 : Mode door motor (front)
D2 M42 W/20 : AV control unit E3 M143 B/6 : Air mix door motor (passenger)
D2 M43 W/12 : AV control unit C1 M144 B/6 : Defroster door motor
D2 M44 W/32 : AV control unit E3 M146 GR/2 : Intake sensor
D3 M45 W/40 : AV control unit D3 M147B/6 : Air mix doo r motor (driver)
B1 M47 B/2 : Sonar buzzer D2 M148 W/4 : Headlamp aiming switch
D2 M49 B/26 : A/C auto amp. D3 M149 W/4 : Clock
D2 M50 L/26 : A/C auto amp. B1 M150 W/2 : Ignition keyhole illumination
B3 M51 L/4 : Trailer tow relay 1 A3 M158 W/10 : To D3
B2 M52 W/2 : Combination switch (spiral cable) Console sub-harness
D3 M53 B/3 : Front power socket LH D4 M201 W/16 : To M56
E3 M54 B/3 : Front power socket RH (for cigarette
lighter) D4 M202 BR/24 : To M64
Revision: December 20092009 QX56

PWC-10
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM)INFOID:0000000004064497
APPLICATION ITEM
CONSULT-III performs the following functions via CAN communication with BCM.
SYSTEM APPLICATION
BCM can perform the following functions for each system.
NOTE:
It can perform the diagnosis modes except the following for all sub system selection items.
RETAINED PWR
RETAINED PWR : CONSULT-III Function (BCM - RETAINED PWR)INFOID:0000000004064498
Data monitor
Diagnosis mode Function Description
WORK SUPPORT Changes the setting for each system function.
SELF-DIAG RESULTS Displays the diagnosis results judged by BCM. Refer to BCS-51, "DTC Index"
.
CAN DIAG SUPPORT MNTR Monitors the reception status of CAN communication viewed from BCM.
DATA MONITOR The BCM input/output signals are displayed.
ACTIVE TEST The signals used to activate each device are forcibly supplied from BCM.
ECU IDENTIFICATION The BCM part number is displayed.
CONFIGURATION  Enables to read and save the vehicle specification.
 Enables to write the vehicle specification when replacing BCM.
System Sub system selection item Diagnosis mode
WORK SUPPORT DATA MONITOR ACTIVE TEST
BCM BCM ×
Door lock DOOR LOCK ×××
Rear window defo gger REAR DEFOGGER ×
Warning chime BUZZER ××
Interior room lamp timer INT LAMP ×××
Remote keyless entry system MULTI REMOTE ENT ××
Exterior lamp HEAD LAMP ×××
Wiper and washer WIPER ×××
Turn signal and hazard warning lamps FLASHER ××
Air conditioner AIR CONDITONER ×
Intelligent Key system INTELLIGENT KEY ×
Combination switch COMB SW ×
Immobilizer IMMU ××
Interior room lamp battery saver BATTERY SAVER ×××
Back door open TRUNK ××
RAP (retained accessory power) RETAINED PWR ×××
Signal buffer system SIGNAL BUFFER ××
TPMS (tire pressure monitoring sys-
tem) AIR PRESSURE MONITOR
×××
Vehicle security system PANIC ALARM ×
Revision: December 20092009 QX56

RF-8
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM)INFOID:0000000005867481
APPLICATION ITEM
CONSULT-III performs the following functions via CAN communication with BCM.
SYSTEM APPLICATION
BCM can perform the following functions for each system.
NOTE:
It can perform the diagnosis modes except the following for all sub system selection items.
RETAINED PWR
RETAINED PWR : CONSULT-III Function (BCM - RETAINED PWR)INFOID:0000000005867482
Data monitor
Diagnosis mode Function Description
WORK SUPPORT Changes the setting for each system function.
SELF-DIAG RESULTS Displays the diagnosis results judged by BCM. Refer to RF-29, "
DTCIndex".
CAN DIAG SUPPORT MNTR Monitors the reception status of CAN communication viewed from BCM.
DATA MONITOR The BCM input/output signals are displayed.
ACTIVE TEST The signals used to activate each device are forcibly supplied from BCM.
ECU IDENTIFICATION The BCM part number is displayed.
CONFIGURATION • Enables to read and save the vehicle specification.
• Enables to write the vehicle specification when replacing BCM.
System
Sub system selection item Diagnosis mode
WORK SUPPORT DATA MONITOR ACTIVE TEST
BCM BCM ×
Door lock DOOR LOCK ×××
Rear window defogger REAR DEFOGGER ×
Warning chime BUZZER ××
Interior room lamp timer INT LAMP ×××
Remote keyless entry system MULTI REMOTE ENT ××
Exterior lamp HEAD LAMP ×××
Wiper and washer WIPER ×××
Turn signal and hazard warning lamps FLASHER ××
Air conditioner AIR CONDITONER ×
Intelligent Key system INTELLIGENT KEY ×
Combination switch COMB SW ×
Immobilizer IMMU ××
Interior room lamp battery saver BATTERY SAVER ×××
Back door open TRUNK ××
RAP (retained accessory power) RETAINED PWR ×××
Signal buffer system SIGNAL BUFFER ××
TPMS (tire pressure monitoring sys-
tem) AIR PRESSURE MONITOR
×××
Vehicle security system PANIC ALARM ×
Revision: December 20092009 QX56

BCM (BODY CONTROL MODULE)RF-29
< ECU DIAGNOSIS >
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DTC Inspection Priority ChartINFOID:0000000005867492
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
DTC IndexINFOID:0000000005867493
NOTE: Details of time display
• CRNT: Displays when there is a malfunction now or after returning to the normal condition until turning igni-
tion switch OFF → ON again.
• 1 - 39: Displayed if any previous ma lfunction is present when current conditi on is normal. It increases like 1
→ 2 → 3...38 → 39 after returning to the normal condition whenever ignition switch OFF → ON. The counter
remains at 39 even if the number of cycles exceeds it. It is counted from 1 again when turning ignition switch
OFF → ON after returning to the normal condi tion if the malfunction is detected again.
Display contents of CONSULT Fail-safe Cancellation
U1000: CAN COMM CIRCUIT I nhibit engine crankingWhen the BCM re-establishes communication with the other mod-
ules.
U1010: CONTROL UNIT (CAN) Inhibit engine cranking When the BCM re-start communicating with the other modules.
Priority DTC
1 • U1000: CAN COMM CIRCUIT
• U1010: CONTROL UNIT (CAN)
2 • B2190: NATS ANTENNA AMP
• B2191: DIFFERENCE OF KEY
• B2192: ID DISCORD BCM-ECM
• B2193: CHAIN OF BCM-ECM
• B2013: STRG COMM 1
• B2552: INTELLIGENT KEY
• B2590: NATS MALFUNCTION
3 • C1729: VHCL SPEED SIG ERR
• C1735: IGNITION SIGNAL
4 • C1704: LOW PRESSURE FL
• C1705: LOW PRESSURE FR
• C1706: LOW PRESSURE RR
• C1707: LOW PRESSURE RL
• C1708: [NO DATA] FL
• C1709: [NO DATA] FR
• C1710: [NO DATA] RR
• C1711: [NO DATA] RL
• C1712: [CHECKSUM ERR] FL
• C1713: [CHECKSUM ERR] FR
• C1714: [CHECKSUM ERR] RR
• C1715: [CHECKSUM ERR] RL
• C1716: [PRESSDATA ERR] FL
• C1717: [PRESSDATA ERR] FR
• C1718: [PRESSDATA ERR] RR
• C1719: [PRESSDATA ERR] RL
• C1720: [CODE ERR] FL
• C1721: [CODE ERR] FR
• C1722: [CODE ERR] RR
• C1723: [CODE ERR] RL
• C1724: [BATT VOLT LOW] FL
• C1725: [BATT VOLT LOW] FR
• C1726: [BATT VOLT LOW] RR
• C1727: [BATT VOLT LOW] RL
Revision: December 20092009 QX56