ground INFINITI QX56 2011 Factory Service Manual

DAS-512
< DTC/CIRCUIT DIAGNOSIS >[BSW]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
ADAS CONTROL UNIT
ADAS CONTROL UNIT : Diagnosis ProcedureINFOID:0000000006223967
1.CHECK ADAS CONTROL UNIT POWER SUPPLY CIRCUIT
Check voltage between ADAS control unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the ADAS control unit power supply circuit.
2.CHECK ADAS CONTROL UNIT GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect the ADAS control unit connector.
3. Check for continuity between ADAS control unit harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair the ADAS control unit ground circuit.
SIDE RADAR LH
SIDE RADAR LH : Diagnosis ProcedureINFOID:0000000006223968
1.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the side radar LH connector.
3. Check voltage between side radar LH harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the side radar LH power supply circuit.
2.CHECK GROUND CIRCUIT
Check continuity between side radar LH harness connectors and ground.
Te r m i n a l Condition
Voltag e
(Approx.)
(+) (–)
ADAS control unit
GroundIgnition
switch
Connector Terminal
B61 16 OFF 0 V
ON Battery volt-
age
ADAS control unit
GroundContinuity
Connector Terminal
B61 6 Existed
Te r m i n a l s Condition
Vo l ta g e
(Approx.)
(+) (
−)
Side radar LH
GroundIgnition switch
Connector Terminal
B74 5 OFF 0 V
ON Battery voltage
Revision: 2010 May2011 QX56

DAS
POWER SUPPLY AND GROUND CIRCUITDAS-513
< DTC/CIRCUIT DIAGNOSIS > [BSW]
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Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair the side radar LH ground circuit.
SIDE RADAR RH
SIDE RADAR RH : Diagnosis ProcedureINFOID:0000000006223969
1.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the side radar RH connector.
3. Check voltage between side radar RH harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the side radar RH power supply circuit.
2.CHECK GROUND CIRCUIT
Check continuity between side r adar RH harness connectors and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair the side radar RH ground circuit.
Side radar LH GroundContinuity
Connector Terminal
B74 2 Existed
Te r m i n a l s Condition
Vo l ta g e
(Approx.)
(+) (
−)
Side radar RH
GroundIgnition switch
Connector Terminal
B243 5 OFF 0 V
ON Battery voltage
Side radar RH GroundContinuity
Connector Terminal
B243 2 Existed
Revision: 2010 May2011 QX56

DAS-514
< DTC/CIRCUIT DIAGNOSIS >[BSW]
RIGHT/LEFT SWITCHING SIGNAL CIRCUIT
RIGHT/LEFT SWITCHING SIGNAL CIRCUIT
Diagnosis ProcedureINFOID:0000000006223970
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Check the terminals and connectors of the side radar RH for damage, bend and short (unit side and con-
nector side).
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal or connector.
2.CHECK CONTINUITY RIGHT/LEFT SWITCHING SIGNAL CIRCUIT
1. Disconnect side radar RH connector.
2. Check continuity between side radar RH harness connectors and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair harness or connector.
Side radar RH
GroundContinuity
Connector Terminal
B243 1 Existed
Revision: 2010 May2011 QX56

DAS
WARNING SYSTEMS SWITCH CIRCUITDAS-515
< DTC/CIRCUIT DIAGNOSIS > [BSW]
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WARNING SYSTEMS SWITCH CIRCUIT
Component Function CheckINFOID:0000000006223971
1.CHECK WARNING SYSTEMS SWITCH INPUT SIGNAL
1. Turn the ignition switch ON.
2. Select the DATA MONITOR item “WARN SYS SW” of “ICC/ADAS” with CONSULT-III.
3. With operating the warning systems switch, check the monitor status.
Is the inspection result normal?
YES >> Warning systems switch circuit is normal.
NO >> Refer to DAS-389, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006223972
1.CHECK WARNING SYSTEMS SWITCH SIGNAL INPUT
1. Turn the ignition switch ON.
2. Check voltage between ADAS control unit harness connector and ground.
Is the inspection result normal?
YES >> Replace the ADAS control unit. Refer to DAS-63, "Removal and Installation".
NO >> GO TO 2.
2.CHECK WARNING SYSTEMS SWITCH
1. Turn ignition switch OFF.
2. Remove warning systems switch.
3. Check warning systems switch. Refer to DAS-390, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Replace the warning systems switch. Refer to DAS-404, "
Removal and Installation".
3.CHECK WARNING SYSTEMS SWITCH GROUND CIRCUIT
Check continuity between twin switch harness connector terminal and the ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair harness or connector.
4.CHECK WARNING SYSTEM S SWITCH SIGNAL INPUT CIRCUIT FOR OPEN
1. Disconnect the ADAS control unit connector.
Monitor item Condition Monitor status
WARN SYS
SW Warning systems switch is pressed On
Warning systems switch is not pressed OFF
Te r m i n a l s
Condition
Vo l ta g e
(Approx.)
(+) (
−)
ADAS control unit
GroundWarning
systems switch
Connector Terminal
B61 1 Pressed 0 V
Released 12 V
Twin switch GroundContinuity
Connector Terminal
M127 3 Existed
Revision: 2010 May2011 QX56

DAS-516
< DTC/CIRCUIT DIAGNOSIS >[BSW]
WARNING SYSTEMS SWITCH CIRCUIT
2. Check continuity between the ADAS control unit harness connector and twin switch harness connector.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair the harnesses or connectors.
5.CHECK WARNING SYSTEMS SWITCH SI
GNAL INPUT CIRCUIT FOR SHORT
Check continuity between the ADAS control unit harness connector and ground.
Is the inspection result normal?
YES >> Replace the ADAS control unit. Refer to DAS-63, "Removal and Installation".
NO >> Repair the harnesses or connectors.
Component InspectionINFOID:0000000006223973
1.CHECK WARNING SYSTEMS SWITCH
Check continuity of warning systems switch.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace warning systems switch.
ADAS control unit Twin switch Continuity
Connector Terminal Connector Terminal
B61 1 M127 2 Existed
ADAS control unit GroundContinuity
Connector Terminal
B61 1 Not existed
Terminal Condition Continuity
23 When warning systems switch is pressed Existed
When warning systems switch is released Not existed
Revision: 2010 May2011 QX56

DAS
WARNING SYSTEMS ON INDICATOR CIRCUITDAS-517
< DTC/CIRCUIT DIAGNOSIS > [BSW]
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WARNING SYSTEMS ON INDICATOR CIRCUIT
Component Function CheckINFOID:0000000006223974
1.CHECK WARNING SYSTEMS ON INDICATOR
1. Turn the ignition switch ON.
2. Select the active test item “WARNING SY STEM IND” of “ICC/ADAS” with CONSULT-III.
3. With operating the test item, check the operation.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Refer to DAS-517, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006223975
1.CHECK WARNING ON INDICATOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect twin switch connector.
3. Turn ignition switch ON.
4. Check voltage between twin switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the warning systems ON indicator power supply circuit.
2.CHECK WARNING SYSTEMS ON INDICATOR SIGNAL FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect the ADAS control unit harness connector.
3. Check continuity between the ADAS control uni t harness connector and twin switch harness connector.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the harnesses or connectors.
3.CHECK WARNING SYSTEMS ON INDI CATOR SIGNAL CIRCUIT FOR SHORT
Check continuity between the ADAS control unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4. On : Warning systems ON indicator illuminates
Off : Warning systems ON in
dicator is turned OFF
Te r m i n a l s
Vo l ta g e
(Approx.)
(+) (
−)
Twin switch Ground
Connector Terminal
M127 8 Battery voltage
ADAS control unit Twin switch Continuity
Connector Terminal Connector Terminal
B61 4 M127 9 Existed
ADAS control unit
GroundContinuity
Connector Terminal
B61 4 Not existed
Revision: 2010 May2011 QX56

DAS
WARNING BUZZER CIRCUITDAS-519
< DTC/CIRCUIT DIAGNOSIS > [BSW]
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WARNING BUZZER CIRCUIT
Component Function CheckINFOID:0000000006223977
1.CHECK WARNING BUZZER
1. Turn the ignition switch ON.
2. Select the active test item “LDP BU ZZER” of “ICC/ADAS” with CONSULT-III.
3. With operating the test item, check the operation.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Refer to DAS-393, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006223978
1.CHECK WARNING BUZZER POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the warning buzzer connector.
3. Turn ignition switch ON.
4. Check voltage between the warning buzzer harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the warning buzzer power supply circuit.
2.CHECK WARNING BUZZER GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between the warning buzzer harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the harnesses or connectors.
3.CHECK WARNING BUZZER SIGNAL CIRCUIT FOR OPEN
1. Disconnect the ADAS control unit connector.
2. Check continuity between the ADAS control uni t harness connector and warning buzzer harness connec-
tor.
Is the inspection result normal?
On : Warning buzzer is activated.
Off : Warning buzzer is not activated.
Te r m i n a l s Vo l ta g e
(Approx.)
(+) (
−)
Warning buzzer Ground
Connector Terminal
M94 1 Battery voltage
Warning buzzer GroundContinuity
Connector Terminal
M94 3 Existed
ADAS control unit Warning buzzer Continuity
Connector Terminal Connector Terminal
B61 12 M94 2 Existed
Revision: 2010 May2011 QX56

DAS-520
< DTC/CIRCUIT DIAGNOSIS >[BSW]
WARNING BUZZER CIRCUIT
YES >> GO TO 4.
NO >> Repair the harnesses or connectors.
4.CHECK WARNING BUZZER SIGNAL CIRCUIT FOR SHORT
Check continuity between the ADAS control unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair the harnesses or connectors.
5.CHECK WARNING BUZZER OPERATION
1. Connect the warning buzzer connector.
2. Turn ignition switch ON.
3. Apply ground to warning buzzer terminal 2.
4. Check condition of the warning buzzer.
Does warning buzzer sound?
YES >> Replace the ADAS control unit.
NO >> Replace the warning buzzer.
ADAS control unit
GroundContinuity
Connector Terminal
M61 12 Not existed
Revision: 2010 May2011 QX56

DAS
BSW SYSTEM SYMPTOMSDAS-521
< SYMPTOM DIAGNOSIS > [BSW]
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SYMPTOM DIAGNOSIS
BSW SYSTEM SYMPTOMS
Symptom TableINFOID:0000000006223979
CAUTION:
Perform the self-diagnosis with CONS ULT-III before the symptom diagnosis. Perform the trouble diag-
nosis if any DTC is detected.
NOTE:
For the operational conditions of BSW, refer to DAS-410, "
System Description".
Symptom Possible cause Inspection item/Reference page
Indicator/warning lamps do not il-
luminate when ignition switch
OFF ⇒ ON. BSW warning lamp (Yellow)
does not illuminate
 BSW warning lamp signal
(CAN)
- Combination meter
- ADAS control unit
 BSW warning lamp (combina- tion meter)  ADAS control unit Active test
“BSW/BSI WARNING LAMP”
Refer to DAS-419, "
CON-
SULT-III Function (ICC/
ADAS)".
 ADAS control unit Data moni-
tor “BSW/BSI WARN LMP”
Refer to DAS-419, "
CON-
SULT-III Function (ICC/
ADAS)"
 Combination meter Data mon-
itor “BSW W/L”
Refer to MWI-30, "
CONSULT-
III Function"
All of indicator/warning
lamps do not illuminate;
 BSW warning lamp
 Warning systems ON indi-
cator  Power supply and ground cir-
cuit of ADAS control unit
 ADAS control unit
 Combination meter Power supply and ground circuit
of ADAS control unit
Refer to
DAS-512, "
ADAS CON-
TROL UNIT : Diagnosis Proce-
dure"
Warning systems ON indica-
tor (on the warning systems
switch) does not illuminate  Harness between ADAS con-
trol unit and warning systems
switch
 Warning systems switch
 ADAS control unit Warning systems ON indicator
circuit
Refer to
DAS-517, "
Diagnosis
Procedure"
BSW indicator does not turn
ON  Harness between side radar
and BSW indicator
 Side radar LH/RH
 BSW indicator Perform self-diagnosis of side ra-
dar
Refer to
DAS-429, "CONSULT-III
Function (SIDE RADAR LEFT)"
or DAS-431, "
CONSULT-III Func-
tion (SIDE RADAR RIGHT)".
BSW system is not activated.
(Indicator/warning lamps illumi-
nate when ignition switch OFF ⇒
ON.) Warning systems ON indica-
tor is not turned ON
⇔ OFF
when operating warning sys-
tems switch  Harness between ADAS con-
trol unit and waning systems
switch
 Harness between warning
systems switch and ground
 ADAS control unit
 Warning systems switch Warning systems ON indicator
circuit
Refer to
DAS-517, "
Diagnosis
Procedure".
Buzzer is not sounding  Buzzer power supply circuit
 Harness between ADAS con-
trol unit and warning buzzer
 Harness between warning
buzzer and ground
 Warning buzzer
 ADAS control unit Warning buzzer circuit
Refer to
DAS-519, "
Diagnosis
Procedure"
Revision: 2010 May2011 QX56

DIAGNOSIS SYSTEM (IPDM E/R)DEF-11
< SYSTEM DESCRIPTION >
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Concept of auto active test
 IPDM E/R starts the auto active test with the door
switch signals transmitted by BCM via CAN communica-
tion. Therefore, the CAN communication line between IPDM E/R and BCM is considered normal if the auto
active test starts successfully.
 The auto active test facilitates troubleshooting if any systems controlled by IPDM E/R cannot be operated.
Diagnosis chart in auto active test
5 Headlamp LO for 10 seconds →HI ON ⇔ OFF 5 times
6 A/C compressor (magnet clutch) ON ⇔ OFF 5 times
Operation
sequence Inspection location Operation
JMMIA0492GB
Symptom Inspection contents Possible cause
Rear window defogger does not operate Perform auto active test.
Does the rear window defog-
ger operate?YES BCM signal input circuit
NO  Rear window defogger
 Rear window defogger
ground circuit
 Harness or connector be- tween IPDM E/R and rear
window defogger
 IPDM E/R
Any of the following components do not operate
Parking lamp
 License plate lamp
Tail lamp
 Side marker lamp
 Front fog lamp
 Headlamp (HI, LO)
 Front wiper (HI, LO) Perform auto active test.
Does the applicable system
operate?YES BCM signal input circuit
NO  Lamp or motor
 Lamp or motor ground cir-
cuit
 Harness or connector be- tween IPDM E/R and appli-
cable system
 IPDM E/R
A/C compressor does not operate Perform auto active test.
Does the magnet clutch oper-
ate?YES
 A/C auto amp. signal input
circuit
 CAN communication signal
between A/C auto amp. and
ECM
 CAN communication signal
between ECM and IPDM E/
R
NO  Magnet clutch
 Harness or connector be-
tween IPDM E/R and mag-
net clutch
 IPDM E/R
Revision: 2010 May2011 QX56