relay INFINITI QX56 2011 Factory Service Manual

B26F3 STARTER CONTROL RELAYSEC-111
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B26F3 STARTER CONTROL RELAY
DTC LogicINFOID:0000000006226266
DTC DETECTION LOGIC
NOTE:
 If DTC B26F3 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
BCS-70, "
DTC Logic".
 If DTC B26F3 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
BCS-71, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Press push-button ignition switch under the following conditions to start engine.
- Selector lever: In the P position
- Brake pedal: Depressed
2. Wait 2 seconds after engine started.
3. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-111, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226267
1.CHECK DTC OF IPDM E/R
Check DTC in “Self Diagnostic Result” mode of “IPDM E/R” using CONSULT-III.
Is DTC detected?
YES >> Perform the diagnosis procedure rela ted to the detected DTC. Refer to PCS-22, "DTCIndex".
NO >> GO TO 2.
2.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B26F3 START CONT RLY ON BCM requests IPDM E/R to turn starter
control relay OFF, but BCM cannot receive
starter control relay OFF state signal from
IPDM E/R (CAN).  Harness or connectors
(CAN communication line is open or
shorted.)
IPDM E/R
Revision: 2010 May2011 QX56

SEC-112
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B26F4 STARTER CONTROL RELAY
B26F4 STARTER CONTROL RELAY
DTC LogicINFOID:0000000006226268
DTC DETECTION LOGIC
NOTE:
 If DTC B26F4 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
BCS-70, "
DTC Logic".
 If DTC B26F4 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to BCS-71, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Press push-button ignition switch under the followi ng conditions to start engine, and wait 1 second or
more.
- Selector lever: In the P position
- Brake pedal: Depressed
2. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-112, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226269
1.CHECK DTC OF IPDM E/R
Check DTC in “Self Diagnostic Result” mode of “IPDM E/R” using CONSULT-III.
Is DTC detected?
YES >> Perform the diagnosis procedure related to the detected DTC. Refer to PCS-22, "DTCIndex".
NO >> GO TO 2.
2.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B26F4 START CONT RELAY
OFF BCM requests IPDM E/R to turn starter control
relay ON, but BCM cannot
receive starter control
relay ON state signal from IPDM E/R.  Harness or connectors
(CAN communication line is open
or shorted.)
 IPDM E/R
Revision: 2010 May2011 QX56

SEC-118
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B26F9 CRANKING REQUEST CIRCUIT
B26F9 CRANKING REQUEST CIRCUIT
DTC LogicINFOID:0000000006226276
DTC DETECTION LOGIC
NOTE:
 DTC B26F9 can be detected even though the rela
ted circuit is not used in this vehicle.
 If DTC B26F9 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to BCS-70, "
DTC Logic".
 If DTC B26F9 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
BCS-71, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION
1. Start engine and wait 2 seconds or more at idle speed.
2. Drive vehicle for 2 seconds or more.
3. Check DTC in “Self Diagnostic Result ” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-118, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226277
1.CHECK CRANKING REQUEST SIGNAL
1. Turn ignition switch ON.
2. Check voltage between BCM harness connector and ground under the following conditions.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK CRANKING REQUEST SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Disconnect ECM connector.
4. Check continuity between BCM harness connector and ECM harness connector.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B26F9 CRANK REQ CIR SHORT BCM detects that the status of the following
signals does not match.
 Cranking request signal from ECM
 Starter control relay control signal from
ECM (CAN)  Harness or connectors
(Can communication line is open or
shorted.)
 Harness or connectors (Cranking request signal circuit is open
or shorted.)
ECM
BCM
(+)
(–) Condition Voltage (V)
(Approx.)
BCM
Connector Terminal
M69 64 Ground Ignition switch ON  Engine: Stopped
 Selector lever position: P
0
 Engine: Stopped
 Selector lever position: Other than P 12
Engine running 12
Revision: 2010 May2011 QX56

SEC-120
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B26FA CRANKING REQUEST CIRCUIT
B26FA CRANKING REQUEST CIRCUIT
DTC LogicINFOID:0000000006226278
DTC DETECTION LOGIC
NOTE:
 DTC B26FA can be detected even though the related circuit is not used in this vehicle.
 If DTC B26FA is displayed with DTC U1000, first
perform the trouble diagnosis for DTC U1000. Refer to
BCS-70, "
DTC Logic".
 If DTC B26FA is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
BCS-71, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION
1. Start engine and wait 2 seconds or more at idle speed.
2. Drive vehicle for 2 seconds or more.
3. Check DTC in “Self Diagnostic Result ” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-120, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226279
1.CHECK CRANKING REQUEST SIGNAL
1. Turn ignition switch ON.
2. Check voltage between BCM harness connector and ground under the following conditions.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK CRANKING REQUEST SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Disconnect ECM connector.
4. Check continuity between BCM harness connector and ECM harness connector.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B26FA CRANK REQ CIR OPEN BCM detects that the status of the following
signals does not match.
 Cranking request signal from ECM
 Starter control relay
control signal from
ECM (CAN)  Harness or connectors
(Can communication line is open or
shorted.)
 Harness or connectors (Cranking request signal circuit is open
or shorted.)
BCM
ECM
(+)
(–) Condition Voltage (V)
(Approx.)
BCM
Connector Terminal
M69 64 Ground Ignition switch ON  Engine: Stopped
 Selector lever position: P
0
 Engine: Stopped
 Selector lever position: Other than P 12
Engine running 12
Revision: 2010 May2011 QX56

B209F CRANKING REQUEST CIRCUITSEC-123
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B209F CRANKING REQUEST CIRCUIT
DTC LogicINFOID:0000000006226282
DTC DETECTION LOGIC
NOTE:
 DTC B209F can be detected even though the rela ted circuit is not used in this vehicle.
 If DTC B209F is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
PCS-28, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and wait 1 second or more at idle speed.
2. Drive vehicle for 1 second or more.
3. Check DTC in “Self Diagnostic Result” mode of “IPDM E/R” using CONSULT-III.
Is DTC detected?
YES >> Refer to SEC-123, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226283
1.CHECK CRANKING REQUEST SIGNAL
1. Turn ignition switch ON.
2. Check voltage between IPDM E/R harness connector and ground under the following conditions.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK CRANKING REQUEST SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Disconnect ECM connector.
4. Check continuity between IPDM E/R harness connector and ECM harness connector.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B209F CRANK REQ CIR OPEN When the following items do not match, a
malfunction is detected.
 Cranking request signal from ECM
 Starter contro
l relay control signal from
ECM (CAN)  Harness or connectors
(CAN communication line is open or
shorted.)
 Harness or connectors
(Cranking request signal circuit is open
or shorted.)
IPDM E/R
ECM
(+)
(–) Condition Voltage (V)
(Approx.)
IPDM E/R
Connector Terminal
E13 23 Ground Ignition switch ON  Engine: Stopped
 Selector lever position: P
0
 Engine: Stopped
 Selector lever position: Other than P 12
Engine running 12
Revision: 2010 May2011 QX56

B20A0 CRANKING REQUEST CIRCUITSEC-125
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B20A0 CRANKING REQUEST CIRCUIT
DTC LogicINFOID:0000000006226284
DTC DETECTION LOGIC
NOTE:
 DTC B20A0 can be detected although the related circuit is not used in this vehicle.
 If DTC B20A0 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
PCS-28, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and wait 1 second or more at idle speed.
2. Drive vehicle for 1 second or more.
3. Check DTC in “Self Diagnostic Result” mode of “IPDM E/R” using CONSULT-III.
Is DTC detected?
YES >> Refer to SEC-125, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226285
1.CHECK CRANKING REQUEST SIGNAL
1. Turn ignition switch ON.
2. Check voltage between IPDM E/R harness connector and ground under the following conditions.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK CRANKING REQUEST SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Disconnect ECM connector.
4. Check continuity between IPDM E/R harness connector and ECM harness connector.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B20A0 CRANK REQ CIR SHORT When the following items do not match, a
malfunction is detected.
 Cranking request signal from ECM
 Starter control relay
control signal from
ECM (CAN)  Harness or connectors
(CAN communication line is open or
shorted.)
 Harness or connectors
(Cranking request signal circuit is open or
shorted.)
 IPDM E/R
ECM
(+)
(–) Condition Voltage (V)
(Approx.)
IPDM E/R
Connector Terminal
E13 23 Ground Ignition switch ON  Engine: Stopped
 Selector lever position: P
0
 Engine: Stopped
 Selector lever position: Other than P 12
Engine running 12
Revision: 2010 May2011 QX56

B2108 STEERING LOCK RELAYSEC-127
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B2108 STEERING LOCK RELAY
DTC LogicINFOID:0000000006226286
DTC DETECTION LOGIC
NOTE:
 If DTC B2108 is displayed with DTC U1000, first per form the trouble diagnosis for DTC U1000. Refer to
PCS-22, "
DTCIndex".
 If DTC B2108 is displayed with other DTC, fi rst perform the trouble diagnosis for the other DTC.
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Press push-button ignition switch under the fo llowing conditions and wait 1 second or more.
- Selector lever: In the P position
- Brake pedal: Not depressed
2. Check DTC in “Self Diagnostic Result” mode of “IPDM E/R” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-127, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226287
1.CHECK STEERING LOCK RELAY
Check voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace IPDM E/R. Refer to PCS-32, "
Removal and Installation".
2.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B2108 STRG LCK RELAY ON IPDM E/R detects that steering lock relay is
stuck in the ON position for approximately 1
second even if IPDM E/R receives steering lock
relay OFF signal from BCM.  Harness or connectors
(CAN communication line is open
or shorted.)
IPDM E/R
(+)
(–) Condition Voltage (V)
(Approx.)
IPDM E/R
Connector Terminal
E14 46 Ground Ignition switch
OFF
A few seconds after
opening the driver door
Battery voltage
Ignition switch
LOCK Press the push-button
ignition switch
Battery voltage
Ignition switch ACC or ON 0
Revision: 2010 May2011 QX56

SEC-128
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2109 STEERING LOCK RELAY
B2109 STEERING LOCK RELAY
DTC LogicINFOID:0000000006226288
DTC DETECTION LOGIC
NOTE:
 If DTC B2109 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
PCS-32, "
Removal and Installation".
 If DTC B2109 is displayed with other DTC, firs t perform the trouble diagnosis for the other DTC.
 When IPDM E/R power supply voltage is low (Approx . 7 - 8 V for about 1 second), the DTC B2109 may be
detected.
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Press push-button ignition switch under the foll owing conditions and wait 1 second or more.
- Selector lever: In the P position
- Brake pedal: Not depressed
2. Check DTC in “Self Diagnostic Result” mode of “IPDM E/R” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-128, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226289
1.CHECK POWER SUPPLY CIRCUIT
Check IPDM E/R power supply circuit. Refer to PCS-31, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning part.
2.CHECK FUSE
1. Turn ignition switch OFF.
2. Check 10 A fuse (No. 44, located in IPDM E/R).
Is the inspection result normal?
YES >> Replace IPDM E/R. Refer to PCS-32, "Removal and Installation".
NO >> Replace the blown fuse after repairing the cause of ffected circuit if a fuse is blown.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B2109 STRG LCK RELAY OFF IPDM E/R detects that steering lock relay is
stuck in the OFF position for approximately 1
second even if IPDM E/R receives steering
lock relay ON/OFF signal from BCM.  Harness or connector
(CAN communication line is open or
shorted.)
 Harness or connector (Power supply circui t for steering lock
relay is open or shorted.)
IPDM E/R
 Battery
Revision: 2010 May2011 QX56

B210B STARTER CONTROL RELAYSEC-131
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B210B STARTER CONTROL RELAY
DTC LogicINFOID:0000000006226292
DTC DETECTION LOGIC
NOTE:
If DTC B210B is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to PCS-
28, "DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Press push-button ignition switch under the follo wing conditions to start engine, and wait 1 second or
more.
- Selector lever: In the P position
- Brake pedal: Depressed
2. Check DTC in “Self Diagnostic Result” mode of “IPDM E/R” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-131, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226293
1.CHECK DTC OF BCM
Check DTC in “Self Diagnostic Result ” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Perform the trouble diagnosis rela ted to the detected DTC. Refer to BCS-57, "DTCIndex".
NO >> GO TO 2.
2.INSPECTION START
1. Turn ignition switch ON.
2. Select “Self Diagnostic Result” mode of “IPDM E/R” using CONSULT-III.
3. Touch “ERASE”.
4. Perform DTC CONFIRMATION PROCEDURE for DTC B210B. Refer to PCS-22, "
DTCIndex".
Is DTC detected?
YES >> GO TO 3.
NO >> INSPECTION END
3.REPLACE BCM
1. Replace BCM. Refer to BCS-81, "
Removal and Installation".
2. Perform DTC CONFIRMATION PROCEDURE for DTC B210B. Refer to SEC-131, "
DTC Logic".
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace IPDM E/R. Refer to PCS-32, "
Removal and Installation".
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B210B START CONT RLY ON When comparing the following items, IPDM E/R detects
that starter control relay is stuck in the ON position for
1 second or more.
 Starter control relay
signal (CAN) from BCM
 Starter relay status signal (CAN) from BCM
 Starter control relay and starter relay status signal
(IPDM E/R input)
 Starter control relay contro l signal (IPDM E/R output)
 P/N position signal input  Harness or connectors
(CAN communication line is
open or shorted.
 IPDM E/R
BCM
Revision: 2010 May2011 QX56

SEC-132
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B210C STARTER CONTROL RELAY
B210C STARTER CONTROL RELAY
DTC LogicINFOID:0000000006226294
DTC DETECTION LOGIC
NOTE:
 If DTC B210C is displayed with DTC U1000, first
perform the trouble diagnosis for DTC U1000. Refer to
PCS-28, "
DTC Logic".
 When IPDM E/R power supply voltage is low (Approx. 7 - 8 V for about 1 second), the DTC B210C may be
detected.
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Press push-button ignition switch under the followi ng conditions to start engine, and wait 1 second or
more.
- Selector lever: In the P position
- Brake pedal: Depressed
2. Check DTC in “Self Diagnostic Result” mode of “IPDM E/R” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-132, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226295
1.CHECK DTC OF BCM
Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Perform the trouble diagnosis relat ed to the detected DTC. Refer to BCS-57, "DTCIndex".
NO >> GO TO 2.
2.INSPECTION START
1. Turn ignition switch ON.
2. Select “Self Diagnostic Result” mode of “IPDM E/R” using CONSULT-III.
3. Touch “ERASE”.
4. Perform DTC CONFIRMATION PROC EDURE for DTC B210C. Refer to SEC-132, "
DTC Logic".
Is DTC detected?
YES >> GO TO 3.
NO >> INSPECTION END
3.REPLACE BCM
1. Replace BCM. Refer to BCS-81, "
Removal and Installation".
2. Perform DTC CONFIRMATION PROC EDURE for DTC B210C. Refer to SEC-132, "
DTC Logic".
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace IPDM E/R. Refer to PCS-32, "
Removal and Installation".
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B210C START CONT RLY OFF When comparing the following items, IPDM E/R detects
that starter control relay is stuck in the OFF position for
1 second or more.
 Starter control relay
signal (CAN) from BCM
 Starter relay status signal (CAN) from BCM
 Starter control relay and starter relay status signal (IP- DM E/R input)
 Starter control relay contro l signal (IPDM E/R output)
 P/N position signal input  Harness or connectors
(CAN communication
line is open or shorted.
 IPDM E/R
BCM
Revision: 2010 May2011 QX56