2009 INFINITI QX56 display

BCS-30
< COMPONENT DIAGNOSIS >[BCM]
U1000 CAN COMM CIRCUIT
COMPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000003776407
Refer to
LAN-44, "CAN Communication Signal Chart".
DTC LogicINFOID:0000000003776408
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000003776409
1. PERFORM SELF DIAGNOSTIC
1. Turn ignition switch ON and wait for 2 seconds or more.
2. Check “Self Diagnostic Result” of BCM.
Is
“CAN COMM CIRCUIT” displayed?
YES >> Refer to LAN-14, "Trouble Diagnosis Flow Chart".
NO >> Refer to GI-38, "Intermittent Incident"
.
DTCCONSULT-III display
description DTC Detection Condition Possible cause
U1000 CAN COMM CIRCUIT When BCM cannot communicate CAN com-
munication signal continuously for 2 sec-
onds or more. Any item (or items) of the following listed below is
malfunctioning in CAN communication system.
Transmission
 Receiving (ECM)
 Receiving (METER/M&A)
 Receiving (TCM)
 Receiving (MULTI AV)
 Receiving (IPDM E/R)
 Receiving (I-KEY)
Revision: December 20092009 QX56

BCS
U1010 CONTROL UNIT (CAN)BCS-31
< COMPONENT DIAGNOSIS > [BCM]
C
D
E
F
G H
I
J
K L
B A
O P
N
U1010 CONTROL UNIT (CAN)
DTC LogicINFOID:0000000003776410
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000003776411
1. REPLACE BCM
When “DTC:U1010” is detected, replace BCM.
>> Replace BCM. Refer to BCS-56, "Removal and Installation"
.
Special Repair RequirementINFOID:0000000003776412
1. ADDITIONAL SERVICE WHEN REPLACING BCM
>> Refer to BCS-3, "ADDITIONAL SERVICE WHEN RE PLACING CONTROL UNIT : Special Repair
Requirement".
DTCCONSULT-III display de-
scription DTC Detection Condit
ion Possible cause
U1010 CONTROL UNIT (CAN) When detecting error during the initial diagnosis of CAN control-
ler of BCM.
BCM
Revision: December 20092009 QX56

BCS
BCM (BODY CONTROL MODULE)BCS-51
< ECU DIAGNOSIS > [BCM]
C
D
E
F
G H
I
J
K L
B A
O P
N
DTC Inspection Priority ChartINFOID:0000000003776424
If some DTCs are displayed at the same time, per
form inspections one by one based on the following priority
chart.
DTC IndexINFOID:0000000003776425
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

BCS-52
< ECU DIAGNOSIS >[BCM]
BCM (BODY CONTROL MODULE)
CONSULT display Fail-safeIntelligent Key
warning lamp ON Tire pressure
monitor warning lamp ON Reference page
No DTC is detected.
further testing
may be required. ————
U1000: CAN COMM CIRCUIT — — — BCS-30
U1010: CONTROL UNIT (CAN) — — —BCS-31
B2190: NATS ANTENNA AMP — — —SEC-27
B2191: DIFFERENCE OF KEY — — — SEC-30
B2192: ID DISCORD BCM-ECM — — —SEC-31
B2193: CHAIN OF BCM-ECM — — —SEC-33
B2552: INTELLIGENT KEY — — —SEC-35
B2590: NATS MALFUNCTION — — —SEC-36
C1704: LOW PRESSURE FL — — — WT-26
C1705: LOW PRESSURE FR — — —WT-26
C1706: LOW PRESSURE RR — — —WT-26
C1707: LOW PRESSURE RL — — —WT-26
C1708: [NO DATA] FL — — —WT-14
C1709: [NO DATA] FR — — —WT-14
C1710: [NO DATA] RR — — —WT-14
C1711: [NO DATA] RL — — —WT-14
C1712: [CHECKSUM ERR] FL — — —WT-16
C1713: [CHECKSUM ERR] FR — — —WT-16
C1714: [CHECKSUM ERR] RR — — —WT-16
C1715: [CHECKSUM ERR] RL — — —WT-16
C1716: [PRESSDATA ERR] FL — — —WT-18
C1717: [PRESSDATA ERR] FR — — —WT-18
C1718: [PRESSDATA ERR] RR — — —WT-18
C1719: [PRESSDATA ERR] RL — — —WT-18
C1720: [CODE ERR] FL — — —WT-16
C1721: [CODE ERR] FR — — —WT-16
C1722: [CODE ERR] RR — — —WT-16
C1723: [CODE ERR] RL — — —WT-16
C1724: [BATT VOLT LOW] FL — — —WT-16
C1725: [BATT VOLT LOW] FR — — —WT-16
C1726: [BATT VOLT LOW] RR — — —WT-16
C1727: [BATT VOLT LOW] RL — — —WT-16
C1729: VHCL SPEED SIG ERR — — —WT-19
C1735: IGNITION SIGNAL — — — —
Revision: December 20092009 QX56

BRC-6
< BASIC INSPECTION >[VDC/TCS/ABS]
DIAGNOSIS AND REPAIR WORKFLOW
2.PERFORM THE SELF-DIAGNOSIS
Check the DTC display with the self-diagnosis function. Refer to BRC-24, "
CONSULT-III Function (ABS)".
Is there any DTC displayed?
YES >> GO TO 3
NO >> GO TO 4
3.PERFORM THE SYSTEM DIAGNOSIS
Perform the diagnosis applicable to the displayed DTC. Refer to BRC-100, "
DTC No. Index".
>> GO TO 7
4.CHECK THE SYMPTOM THAT IS NOT CONSIDERED A SYSTEM MALFUNCTION
Check that the symptom is a normal operation that is not considered a system malfunction. Refer to BRC-109,
"Description".
Is the symptom a normal operation?
YES >> Inspection End
NO >> GO TO 5
5.CHECK THE WARNING LAMP AND I NDICATOR LAMP FOR ILLUMINATION
Check that the warning lamp and indicator lamp illuminate.
• ABS warning lamp: Refer to BRC-83, "
Description".
• Brake warning lamp: Refer to BRC-84, "
Description".
• VDC OFF indicator lamp: Refer to BRC-85, "
Description".
• SLIP indicator lamp: Refer to BRC-86, "
Description".
Is ON/OFF timing normal?
YES >> GO TO 6
NO >> GO TO 2
6.PERFORM THE DIAGNOSIS BY SYMPTOM
Perform the diagnosis applicable to the symptom.
>> GO TO 7
7.REPAIR OR REPLACE THE MALFUNCTIONING PARTS
Repair or replace the specified malfunctioning parts.
>> GO TO 8
8.FINAL CHECK
Perform the self-diagnosis again, and check that the malfunction is repaired completely. After checking, erase
the self-diagnosis memory. Refer to BRC-24, "
CONSULT-III Function (ABS)".
Is no other DTC present and the repair completed?
YES >> Inspection End
NO >> GO TO 3
Revision: December 20092009 QX56

BRC-24
< FUNCTION DIAGNOSIS >[VDC/TCS/ABS]
DIAGNOSIS SYSTEM [
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)]
DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)]
CONSULT-III Function (ABS)INFOID:0000000003772500
FUNCTION
CONSULT-III can display each diagnostic item us ing the diagnostic test modes shown following.
SELF-DIAG RESULTS MODE
Operation Procedure
1. Before performing the self-diagnosis, start engine and drive vehicle at 30 km/h (19 MPH) or more for
approximately 1 minute.
How to Erase Self-d iagnosis Results
1. After erasing DTC memory, start engine and drive vehicle at 30 km/h (19 MPH) or more for approximately
1 minute as the final inspection, and make sure that the ABS warning lamp, VDC OFF indicator lamp,
SLIP indicator lamp and brake warning lamp turn OFF.
CAUTION:
If memory cannot be erased, pe rform applicable diagnosis.
NOTE:
• When the wheel sensor malfunctions, after inspecting the wheel sensor system, the ABS warning lamp,
VDC OFF indicator lamp, SLIP indicator lamp and brake warning lamp will not turn OFF even when the
system is normal unless the vehicle is driving at approximately 30 km/h (19 MPH) or more for approxi-
mately 1 minute.
• Brake warning lamp will turn ON in case of parking brake operation (when switch is ON) or of brake fluid level switch operation (when brake fluid is insufficient).
• VDC OFF switch should not stay “ON” position.
Display Item List
Refer to BRC-100, "DTC No. Index".
DATA MONITOR MODE
Display Item List
Diagnostic test mode Function
Work support This mode enables a technician to adjust some devices faster and more accurately by following
the indications on CONSULT-III.
Self-diagnostic results Self-diagnostic results can be read and erased quickly.
Data monitor Input/Output data in the ABS actuator and electric unit (control unit) can be read.
Active test Diagnostic test mode is which CONSULT-III drives some actuators apart from the ABS actuator
and electric unit (control unit) and also shifts some parameters in a specified range.
ECU part number ABS actuator and electric unit (control unit) part number can be read.
CAN diagnostic support monitor The results of transmit/receive diagnosis of CAN communication can be read.
Item
(Unit) Data monitor item selection
Remarks
ECU INPUT
SIGNALS MAIN
SIGNALS SELECTION
FROM MENU
GEAR
(1, 2, 3, 4, R) ××× Gear position judged by transmis-
sion range switch signal is dis-
played.
FR RH SENSOR
(km/h, MPH) ××× Wheel speed calculated by front RH
wheel sensor signal is displayed.
FR LH SENSOR
(km/h, MPH) ××× Wheel speed calculated by front LH
wheel sensor signal is displayed.
RR RH SENSOR
(km/h, MPH) ×××
Wheel speed calculated by rear RH
wheel sensor signal is displayed.
Revision: December 20092009 QX56

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)]
BRC-25
< FUNCTION DIAGNOSIS > [VDC/TCS/ABS]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
RR LH SENSOR
(km/h, MPH) ××× Wheel speed calculated by rear LH
wheel sensor signal is displayed.
BATTERY VOLT
(V) ××× Voltage supplied to ABS actuator
and electric unit (control unit) is dis-
played.
N POSI SIG
(ON/OFF) ––
×Shift position (ON/OFF) judged by
transmission range switch signal.
P POSI SIG
(ON/OFF) ––
×Shift position (ON/OFF) judged by
transmission range switch signal.
ACCEL POS SIG
(%) ×
– ×Throttle valve open/close status
judged by CAN communication sig-
nal is displayed.
ENGINE SPEED
(rpm) ×××
Engine speed judged by CAN com-
munication signal is displayed.
STR ANGLE SIG
(deg) ×
– ×Steering angle detected by steering
angle sensor is displayed.
YAW RATE SEN
(d/s) ××× Yaw rate detected by yaw rate sen-
sor is displayed.
SIDE G-SENSOR
(m/s
2) ×
– ×Transverse acceleration detected
by side G-sensor is displayed.
STOP LAMP SW
(ON/OFF) ××× Stop lamp switch (ON/OFF) status
is displayed.
OFF SW
(ON/OFF) ×××
VDC OFF switch (ON/OFF) status
is displayed.
ABS WARN LAMP
(ON/OFF) –
×× ABS warning lamp (ON/OFF) status
is displayed.
SLIP LAMP
(ON/OFF) –
×× SLIP indicator lamp (ON/OFF) sta-
tus is displayed.
FR LH IN SOL
(ON/OFF) –
×× Front LH IN ABS solenoid (ON/
OFF) status is displayed.
FR LH OUT SOL
(ON/OFF) –
×× Front LH OUT ABS solenoid (ON/
OFF) status is displayed.
RR RH IN SOL
(ON/OFF) –
×× Rear RH IN ABS solenoid (ON/
OFF) status is displayed.
RR RH OUT SOL
(ON/OFF) –
×× Rear RH OUT ABS solenoid (ON/
OFF) status is displayed.
FR RH IN SOL
(ON/OFF) –
×× Front RH IN ABS solenoid (ON/
OFF) status is displayed.
FR RH OUT SOL
(ON/OFF) –
×× Front RH OUT ABS solenoid (ON/
OFF) status is displayed.
RR LH IN SOL
(ON/OFF) –
×× Rear LH IN ABS solenoid (ON/OFF)
status is displayed.
RR LH OUT SOL
(ON/OFF) –
×× Rear LH OUT ABS solenoid (ON/
OFF) status is displayed.
OFF LAMP
(ON/OFF) –
×× OFF Lamp (ON/OFF) status is dis-
played.
MOTOR RELAY
(ON/OFF) –
×× ABS motor relay signal (ON/OFF)
status is displayed.
ACTUATOR RLY
(ON/OFF) –
×× ABS actuator relay signal (ON/OFF)
status is displayed.
Item
(Unit) Data monitor item selection
Remarks
ECU INPUT
SIGNALS MAIN
SIGNALS SELE
C
TION
FROM MENU
Revision: December 20092009 QX56

BRC-26
< FUNCTION DIAGNOSIS >[VDC/TCS/ABS]
DIAGNOSIS SYSTEM [
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)]
CV1
(ON/OFF) ––× Front side switch-over solenoid
valve (cut valve) (ON/OFF) status is
displayed.
CV2
(ON/OFF) ––× Rear side switch-over solenoid
valve (cut-valve) (O
N/OFF) status is
displayed.
SV1
(ON/OFF) ––× Front side switch-over solenoid
valve (suction valve) (ON/OFF) sta-
tus is displayed.
SV2
(ON/OFF) ––× Rear side switch-over solenoid
valve (suction valve) (ON/OFF) sta-
tus is displayed.
VDC FAIL SIG
(ON/OFF) ––× VDC fail signal (ON/OFF) status is
displayed.
TCS FAIL SIG
(ON/OFF) ––× TCS fail signal (ON/OFF) status is
displayed.
ABS FAIL SIG
(ON/OFF) ––×
ABS fail signal (ON/OFF) status is
displayed.
EBD FAIL SIG
(ON/OFF) ––× EBD fail signal (ON/OFF) status is
displayed.
FLUID LEV SW
(ON/OFF) ×
– ×Brake fluid level switch (ON/OFF)
status is displayed.
EBD SIGNAL
(ON/OFF) ––×
EBD operation (ON/OFF) status is
displayed.
ABS SIGNAL
(ON/OFF) ––× ABS operation (ON/OFF) status is
displayed.
TCS SIGNAL
(ON/OFF) ––× TCS operation (ON/OFF) status is
displayed.
VDC SIGNAL
(ON/OFF) ––×
VDC operation (ON/OFF) status is
displayed.
EBD WARN LAMP
(ON/OFF) ––× Brake warning lamp (ON/OFF) sta-
tus is displayed.
SLCT LVR POSI
(P, R, N, D, 4, 3, 2, 1) ××× Selector lever position judged by
transmission range switch signal.
R POSI SIG
(ON/OFF) ––× Shift position (ON/OFF) judged by
transmission range switch signal.
2WD/4WD
(2WD/4WD) ––× It
re
cognizes on software whether it
is 2WD and whether it is in 4WD
state.
BST OPER SIG
(ON/OFF) ––× Active booster operation (ON/OFF)
status is displayed.
PRESS SENSOR
(bar) ×
– ×Brake pressure detected by pres-
sure sensor is displayed (bar).
CRANKING SIG
(ON/OFF) ––× The input state of the key SW
START position signal (ON/OFF) is
displayed.
PRESS SEN 2
(bar) ––×
Brake pressure detected by pres-
sure sensor is displayed (bar).
DELTA S SEN
(mm) ––× The amount of stroke sensor move-
ments in the active booster detected
by DELTA S SEN is displayed (mm).
Item
(Unit) Data monitor item selection
Remarks
ECU INPUT
SIGNALS MAIN
SIGNALS SELECTION
FROM MENU
Revision: December 20092009 QX56