2009 INFINITI QX56 ECU

BCS-46
< ECU DIAGNOSIS >[BCM]
BCM (BODY CONTROL MODULE)
Wiring Diagram
INFOID:0000000003776423
AAMWA0236GB
Revision: December 20092009 QX56

BCS
BCM (BODY CONTROL MODULE)BCS-47
< ECU DIAGNOSIS > [BCM]
C
D
E
F
G H
I
J
K L
B A
O P
N
ABMWA0015GB
Revision: December 20092009 QX56

BCS-48
< ECU DIAGNOSIS >[BCM]
BCM (BODY CONTROL MODULE)
AAMWA0237GB
Revision: December 20092009 QX56

BCS
BCM (BODY CONTROL MODULE)BCS-49
< ECU DIAGNOSIS > [BCM]
C
D
E
F
G H
I
J
K L
B A
O P
N
ABMIA0023GB
Revision: December 20092009 QX56

BCS-50
< ECU DIAGNOSIS >[BCM]
BCM (BODY CONTROL MODULE)
Fail Safe
INFOID:0000000004064161
Fail-safe index
BCM performs fail-safe control when any DTC listed below is detected.
ABMIA0024GB
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

BR-22
< ON-VEHICLE REPAIR >
BRAKE TUBE AND HOSE
3. Remove brake tube from brake hose, using a suitable tool.
4. Remove lock plate and brake hose from bracket.
5. Remove union bolt and then remove brake hose from cylinderbody.
INSTALLATION
1. Install brake hose by aligning with the protrusion on cylinderbody, then install the union bolt and new copper washers and
tighten to specification. Refer to BR-13, "
Hydraulic Circuit".
CAUTION:
Do not reuse copper washer.
2. Insert brake hose end through bracket, then secure it to bracket with lock plate.
3. Install brake tube to brake hose, then tighten the flare nut using a suitable tool. Refer to BR-13, "
Hydraulic Circuit".
4. Refill brake fluid and bleed air. Refer to BR-17, "
Drain and Refill".
5. Install wheel and tire assembly. Refer to WT-41, "
Adjustment".
Removal and Installation of Rear Brake Piping and Brake HoseINFOID:0000000004042333
REMOVAL
1. Remove wheel and tire assembly using power tools.
2. Drain brake fluid. Refer to BR-17, "
Drain and Refill".
LFIA0213E
LFIA0214E
SFIA1137E
LFIA0213E
Revision: December 20092009 QX56