Infiniti M (2012 year). Manual — part 4
PCS
POWER DISTRIBUTION SYSTEM
PCS-51
< WIRING DIAGRAM >
[POWER DISTRIBUTION SYSTEM]
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JRMWC4741GB
2012 M
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PCS-52
< BASIC INSPECTION >
[POWER DISTRIBUTION SYSTEM]
DIAGNOSIS AND REPAIR WORK FLOW
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORK FLOW
Work Flow
INFOID:0000000007798071
OVERALL SEQUENCE
DETAILED FLOW
JMKIA8652GB
2012 M
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PCS
DIAGNOSIS AND REPAIR WORK FLOW
PCS-53
< BASIC INSPECTION >
[POWER DISTRIBUTION SYSTEM]
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1.
GET INFORMATION FOR SYMPTOM
1.
Get detailed information from the customer about the symptom (the condition and the environment when
the incident/malfunction occurs).
2.
Check operation condition of the function that is malfunctioning.
>> GO TO 2.
2.
CHECK DTC
1.
Check DTC.
2.
Perform the following procedure if DTC is detected.
-
Record DTC and freeze frame data (Print them out using CONSULT.)
-
Erase DTC.
-
Study the relationship between the cause detected by DTC and the symptom described by the customer.
3.
Check related service bulletins for information.
Are any symptoms described and any DTC detected?
Symptom is described, DTC is detected>>GO TO 3.
Symptom is described, DTC is not detected>>GO TO 4.
Symptom is not described, DTC is detected>>GO TO 5.
3.
CONFIRM THE SYMPTOM
Try to confirm the symptom described by the customer.
Also study the normal operation and fail-safe related to the symptom.
Verify relation between the symptom and the condition when the symptom is detected.
>> GO TO 5.
4.
CONFIRM THE SYMPTOM
Try to confirm the symptom described by the customer.
Verify relation between the symptom and the condition when the symptom is detected.
>> GO TO 6.
5.
PERFORM DTC CONFIRMATION PROCEDURE
Perform DTC CONFIRMATION PROCEDURE for the detected DTC, and then check that DTC is detected
again. At this time, always connect CONSULT to the vehicle, and check self diagnostic results in real time.
If two or more DTCs are detected, refer to
BCS-56, "DTC Inspection Priority Chart"
, and determine trouble
diagnosis order.
NOTE:
• Freeze frame data is useful if the DTC is not detected.
• Perform Component Function Check if DTC CONFIRMATION PROCEDURE is not included on Service
Manual. This simplified check procedure is an effective alternative though DTC cannot be detected during
this check.
If the result of Component Function Check is NG, it is the same as the detection of DTC by DTC CONFIR-
MATION PROCEDURE.
Is DTC detected?
YES
>> GO TO 7.
NO
>> Check according to
GI-44, "Intermittent Incident"
.
6.
DETECT MALFUNCTIONING SYSTEM BY SYMPTOM DIAGNOSIS
Detect malfunctioning system according to SYMPTOM DIAGNOSIS based on the confirmed symptom in step
4, and determine the trouble diagnosis order based on possible causes and symptom.
Is the symptom described?
YES
>> GO TO 7.
NO
>> Monitor input data from related sensors or check voltage of related module terminals using CON-
SULT.
7.
DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE
2012 M
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PCS-54
< BASIC INSPECTION >
[POWER DISTRIBUTION SYSTEM]
DIAGNOSIS AND REPAIR WORK FLOW
Inspect according to Diagnostic Procedure of the system.
Is malfunctioning part detected?
YES
>> GO TO 8.
NO
>> Check according to
GI-44, "Intermittent Incident"
.
8.
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 detected, erase it.
>> GO TO 9.
9.
FINAL CHECK
When DTC is detected in step 2, perform DTC CONFIRMATION PROCEDURE again, and then check that the
malfunction is repaired securely.
When symptom is described by the customer, refer to confirmed symptom in step 3 or 4, and check that the
symptom is not detected.
Is DTC detected and does symptom remain?
YES-1 >> DTC is detected: GO TO 7.
YES-2 >> Symptom remains: GO TO 4.
NO
>> Before returning the vehicle to the customer, always erase DTC.
2012 M
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PCS
B2614 ACC RELAY CIRCUIT
PCS-55
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
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DTC/CIRCUIT DIAGNOSIS
B2614 ACC RELAY CIRCUIT
DTC Logic
INFOID:0000000006887735
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn the power supply position to ACC under the following conditions, and wait for 2 second or more.
-
Selector lever is in the P position
-
Do not depress brake pedal
2.
Check “Self-diagnosis result” of BCM with CONSULT.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006887736
1.
CHECK ACCESSORY RELAY POWER SUPPLY-1
1.
Turn ignition switch OFF.
2.
Disconnect accessory relay.
3.
Check voltage between accessory relay harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK ACCESSORY RELAY POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect BCM connector.
3.
Check continuity between accessory relay harness connector and BCM harness connector.
4.
Check continuity between accessory relay harness connector and ground.
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
B2614
BCM
An immediate operation of accessory relay is re-
quested by BCM, but there is no response for more
than 2 second.
• Harness or connectors
(Accessory relay circuit is open or
shorted)
• BCM
• Accessory relay
(+)
(–)
Condition
Voltage (V)
(Approx.)
Accessory relay
Terminal
1
Ground
Ignition switch
OFF
0
ACC or ON
12
Accessory relay
BCM
Continuity
Terminal
Connector
Terminal
1
M123
96
Existed
2012 M
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PCS-56
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
B2614 ACC RELAY CIRCUIT
Is the inspection result normal?
YES
>> Replace BCM. Refer to
BCS-82, "Removal and Installation"
NO
>> Repair or replace harness.
3.
CHECK ACCESSORY RELAY GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Check continuity between accessory relay harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair accessory relay ground circuit.
4.
CHECK ACCESSORY RELAY POWER SUPPLY CIRCUIT-2
1.
Turn ignition switch ACC.
2.
Check voltage between accessory relay harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Check continuity open or short between accessory relay and battery.
5.
CHECK ACCESSORY RELAY
PCS-56, "Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace accessory relay.
6.
CHECK INTERMITTENT INCIDENT
GI-44, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000006887737
1.
CHECK ACCESSORY RELAY
1.
Turn ignition switch OFF.
2.
Remove accessory relay.
Accessory relay
Ground
Continuity
Terminal
1
Not existed
Accessory relay
Ground
Continuity
Terminal
2
Existed
(+)
(–)
Voltage (V)
(Approx.)
Accessory relay
Terminal
5
Ground
Battery voltage
2012 M
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PCS
B2614 ACC RELAY CIRCUIT
PCS-57
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
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3.
Check the continuity between accessory relay terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace accessory relay
Terminals
Condition
Continuity
3 and 5
12 V direct current supply between terminals 1 and 2
Existed
No current supply
Not existed
PBIB0098E
2012 M
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PCS-58
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
B2615 BLOWER RELAY CIRCUIT
B2615 BLOWER RELAY CIRCUIT
DTC Logic
INFOID:0000000006887738
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON under the following conditions, and wait for 1 second or more.
-
Selector lever is in the P position
-
Do not depress brake pedal
2.
Check “Self-diagnosis result” of BCM with CONSULT.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006887739
1.
CHECK BLOWER RELAY POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect blower relay.
3.
Check voltage between blower relay harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK BLOWER RELAY POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect BCM connector.
3.
Check continuity between blower relay harness connector and BCM harness connector.
4.
Check continuity between blower relay harness connector and ground.
Is the inspection result normal?
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
B2615
BCM
BCM detects a difference of signal for 1 second or
more between the following items.
• Blower relay ON/OFF request
• Blower relay feedback
• Harness or connectors
(Blower relay circuit is open or
shorted)
• BCM
• Blower relay
(+)
(–)
Condition
Voltage (V)
(Approx.)
Blower relay
Terminal
1
Ground
Ignition switch
OFF or ACC
0
ON
Battery voltage
Blower relay
BCM
Continuity
Terminal
Connector
Terminal
1
M123
106
Existed
Blower relay
Ground
Continuity
Terminal
1
Not existed
2012 M
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PCS
B2615 BLOWER RELAY CIRCUIT
PCS-59
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
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YES
>> GO TO 6.
NO
>> Repair or replace harness.
3.
CHECK BLOWER RELAY GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Check continuity between blower relay harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair blower relay ground circuit.
4.
CHECK BLOWER RELAY POWER SUPPLY CIRCUIT-2
1.
Turn ignition switch ON.
2.
Check voltage between blower relay harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Check continuity open or short between blower relay and battery.
5.
CHECK BLOWER RELAY
PCS-59, "Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace blower relay.
6.
CHECK INTERMITTENT INCIDENT
GI-44, "Intermittent Incident"
.
>> INSPECTION END
Component Inspection
INFOID:0000000006887740
1.
CHECK BLOWER RELAY
1.
Turn ignition switch OFF.
2.
Remove blower relay.
3.
Check the continuity between blower relay terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace blower relay
Blower relay
Ground
Continuity
Terminal
2
Existed
(+)
(–)
Voltage (V)
(Approx.)
Blower relay
Terminal
5
Ground
Battery voltage
Terminals
Condition
Continuity
3 and 5
12 V direct current supply between terminals 1 and 2
Existed
No current supply
Not existed
PBIB0098E
2012 M
-------------------------------------------------------------------------------------------------------------------------------------------------------------
PCS-60
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
B2616 IGNITION RELAY CIRCUIT
B2616 IGNITION RELAY CIRCUIT
DTC Logic
INFOID:0000000006887741
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON under the following conditions, and wait for 1 second or more.
-
Selector lever is in the P position
-
Do not depress brake pedal
2.
Check “Self-diagnosis result” with CONSULT.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006887742
1.
CHECK IGNITION RELAY POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect ignition relay.
3.
Check voltage between ignition relay harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK IGNITION RELAY POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect BCM connector.
3.
Check continuity between ignition relay harness connector and BCM harness connector.
4.
Check continuity between ignition relay harness connector and ground.
Is the inspection result normal?
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
B2616
BCM
An immediate operation of ignition relay is request-
ed by BCM, but there is no response for more than
1 second
• Harness or connectors
(Ignition relay circuit is open or
shorted)
• BCM
• Ignition relay
(+)
(–)
Condition
Voltage (V)
(Approx.)
Ignition relay
Terminal
2
Ground
Ignition switch
OFF or ACC
0
ON
Battery voltage
Ignition relay
BCM
Continuity
Terminal
Connector
Terminal
2
M123
99
Existed
Ignition relay
Ground
Continuity
Terminal
2
Not existed
2012 M
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PCS
B2616 IGNITION RELAY CIRCUIT
PCS-61
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
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YES
>> Replace BCM. Refer to
BCS-82, "Removal and Installation"
NO
>> Repair or replace harness.
3.
CHECK IGNITION RELAY GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Check continuity between ignition relay harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair ignition relay ground circuit.
4.
CHECK IGNITION RELAY POWER SUPPLY CIRCUIT-2
1.
Turn ignition switch ON.
2.
Check voltage between ignition relay harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Check continuity open or short between ignition relay and battery.
5.
CHECK IGNITION RELAY
PCS-61, "Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace ignition relay.
6.
CHECK INTERMITTENT INCIDENT
GI-44, "Intermittent Incident"
.
>> INSPECTION END
Component Inspection
INFOID:0000000006887743
1.
CHECK IGNITION RELAY
1.
Turn ignition switch OFF.
2.
Remove ignition relay.
3.
Check the continuity between ignition relay terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace Ignition relay
Ignition relay
Ground
Continuity
Terminal
1
Existed
(+)
(–)
Voltage (V)
(Approx.)
Ignition relay
Terminal
5
Ground
Battery voltage
Terminals
Condition
Continuity
3 and 5
12 V direct current supply between terminals 1 and 2
Existed
No current supply
Not existed
PBIB0098E
2012 M
-------------------------------------------------------------------------------------------------------------------------------------------------------------
PCS-62
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
B2618 BCM
B2618 BCM
DTC Logic
INFOID:0000000006887744
DTC DETECTION LOGIC
NOTE:
• If DTC B2618 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
.
• If DTC B2618 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
.
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON under the following conditions, and wait for 1 second or more.
-
Selector lever is in the P or N position
-
Do not depress brake pedal
2.
Check “Self-diagnosis result” of BCM with CONSULT.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006887745
1.
INSPECTION START
1.
Turn ignition switch ON.
2.
Select “Self-diagnosis result” of BCM with CONSULT.
3.
Touch “ERASE”.
4.
Perform DTC Confirmation Procedure.
See
.
Is the 1st trip DTC B2618 displayed again?
YES
>> Replace BCM. Refer to
BCS-82, "Removal and Installation"
NO
>> INSPECTION END
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
B2618
BCM
An immediate operation of ignition relay (IPDM E/R) is re-
quested by BCM, but there is no response for more than
1 second
BCM
2012 M
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PCS
B261A PUSH-BUTTON IGNITION SWITCH
PCS-63
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
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B261A PUSH-BUTTON IGNITION SWITCH
DTC Logic
INFOID:0000000006887746
DTC DETECTION LOGIC
NOTE:
• If DTC B261A is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
• If DTC B261A is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Press the push-button ignition switch under the following conditions, and wait for 1 second or more.
-
Selector lever is in the P or N position
-
Do not depress brake pedal
2.
Check “Self-diagnosis result” of BCM with CONSULT.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006887747
1.
CHECK IGNITION SWITCH OUTPUT SIGNAL (PUSH-BUTTON IGNITION SWITCH)
1.
Disconnect push-button ignition switch connector and IPDM E/R connector.
2.
Check voltage between push-button ignition switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (BCM)
1.
Disconnect BCM connector.
2.
Check continuity between BCM harness connector and push-button ignition switch harness connector.
3.
Check continuity between push-button ignition switch harness connector and ground.
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
B261A
PUSH-BTN IGN SW
BCM detects a difference of signal for 1 second or
more between the following items.
• Push-button ignition switch signal
• Push-button ignition switch status signal (CAN)
• Harness or connectors
(Push-button ignition switch circuit
is open or shorted.)
• BCM
• IPDM E/R
(+)
(–)
Voltage (V)
(Approx.)
Push-button ignition switch
Connector
Terminal
M50
4
Ground
12
BCM
Push-button ignition switch
Continuity
Connector
Terminal
Connector
Terminal
M123
100
M50
4
Existed
Push-button ignition switch
Ground
Continuity
Connector
Terminal
M50
4
Not existed
2012 M
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PCS-64
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
B261A PUSH-BUTTON IGNITION SWITCH
Is the inspection result normal?
YES
>> Replace BCM. Refer to
BCS-82, "Removal and Installation"
NO
>> Repair or replace harness.
3.
CHECK IGNITION SWITCH OUTPUT SIGNAL (IPDM E/R)
Check voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES
>> Replace IPDM E/R.
NO
>> GO TO 4.
4.
CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (IPDM E/R)
1.
Disconnect IPDM E/R connector.
2.
Check continuity between IPDM E/R harness connector and push-button ignition switch harness connec-
tor.
3.
Check continuity between push-button ignition switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace harness.
5.
CHECK INTERMITTENT INCIDENT
GI-44, "Intermittent Incident"
>> INSPECTION END
(+)
(–)
Voltage (V)
(Approx.)
IPDM E/R
Connector
Terminal
E5
30
Ground
12
IPDM E/R
Push-button ignition switch
Continuity
Connector
Terminal
Connector
Terminal
E5
30
M50
4
Existed
Push-button ignition switch
Ground
Continuity
Connector
Terminal
M50
4
Not existed
2012 M
-------------------------------------------------------------------------------------------------------------------------------------------------------------
PCS
B26F1 IGNITION RELAY
PCS-65
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
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B26F1 IGNITION RELAY
DTC Logic
INFOID:0000000006887748
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON under the following conditions, and wait for 2 seconds or more.
-
Selector lever is in the P or N position
-
Do not depress brake pedal
2.
Check “Self-diagnosis result” with CONSULT.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006887749
1.
CHECK IPDM E/R SELF-DIAGNOSTIC RESULT
1.
Turn ignition switch ON.
2.
Erase the DTC of IPDM E/R.
3.
Turn ignition switch OFF.
4.
Turn ignition switch ON and check the DTC again.
Is DTC detected?
YES
>> Repair or replace the malfunctioning part. Refer to
NO
>> GO TO 2.
2.
CHECK IGNITION RELAY (IPDM E/R) CONTROL SIGNAL
Check voltage between BCM harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace BCM. Refer to
BCS-82, "Removal and Installation"
3.
CHECK IGNITION RELAY (IPDM E/R) CONTROL SIGNAL CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect BCM and IPDM connectors.
3.
Check continuity between BCM harness connector and IPDM E/R harness connector.
Is the inspection result normal?
YES
>> Replace IPDM E/R.
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
B26F1
IGN RELAY OFF
BCM transmits the ignition relay control signal
(ON: 0 V) or ignition switch ON signal (ON)
(CAN), but does not receives ignition switch
ON signal (ON) (CAN) from IPDM E/R.
• Harness or connectors
(ignition relay circuit is open)
• BCM
• IPDM E/R
(+)
(–)
Condition
Voltage (V)
(Approx.)
BCM
Connector
Terminal
M123
98
Ground
Ignition switch
ON
0
BCM
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
M123
98
E5
18
Existed
2012 M
-------------------------------------------------------------------------------------------------------------------------------------------------------------
PCS-66
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
B26F1 IGNITION RELAY
NO
>> Repair or replace harness.
2012 M
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