Infiniti G37 Coupe. Manual — part 971
PCS
B260A IGNITION RELAY
PCS-53
< COMPONENT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
CHECK IGNITION RELAY (IPDM E/R) CIRCUIT
1.
Disconnect IPDM E/R harness connector E5.
2.
Check continuity between IPDM E/R harness connector and BCM harness connector.
3.
Check continuity between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair harness or connector.
4.
CHECK INTERMITTENT INCIDENT
GI-38, "Intermittent Incident"
.
>> INSPECTION END
BCM
Ground
Voltage [V]
Connector
Terminal
M121
47
Ground
Battery voltage
IPDM E/R
BCM
Continuity
Connector
Terminal
Connector
Terminal
E5
27
M121
47
Existed
IPDM E/R
Ground
Continuity
Connector
Terminal
E5
27
Ground
Not existed
PCS-54
< COMPONENT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
B2611 ACC RELAY
B2611 ACC RELAY
Description
INFOID:0000000001675273
BCM turns ON the ACC relay to supply ACC power to each ECU when the power supply position changes to
ACC.
BCM check ACC relay ON request for consistency with the actual ACC relay operation status.
DTC Logic
INFOID:0000000001675274
DTC DETECTION LOGIC
NOTE:
• If DTC B2611 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
.
• If DTC B2611 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
.
*: Electronic goods: Personal computer, CD player...
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE–1
1.
Turn the power supply position to ACC under the following conditions, and wait for at least 2 seconds.
A/T models
-
A/T selector lever is in the P or N position
-
Do not depress brake pedal
M/T models
-
Do not depress clutch pedal
2.
Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES
>> Go to
NO
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE–2
1.
Turn the power supply position ACC to OFF under the following conditions, and wait for at least 2 sec-
onds.
A/T models
-
A/T selector lever is in the P or N position
-
Do not depress brake pedal
M/T models
-
Do not depress clutch pedal
2.
Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES
>> Go to
NO
>> GO TO 3.
3.
CHECK CIGARETTE LIGHTER SOCKET CONDITION
Check if the customer uses to connect some electronic goods* to the Cigarette lighter socket.
*: Electronic goods: Personal computer, CD player...
Has electronic good been connected to Cigarette lighter socket?
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
B2611
ACC RELAY
BCM detects a difference of signal for 2 seconds or
more between the following information.
• ACC relay ON/OFF operation
• ACC relay feedback.
• Harness or connectors
(ACC relay feed back circuit is
open or shorted)
• Some electronic goods* connect to
the cigarette lighter socket
PCS
B2611 ACC RELAY
PCS-55
< COMPONENT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
YES
>> DTC detection is possible.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000001675275
1.
INSPECTION START
Confirm that the electronic good* connect to the cigarette lighter socket.
*: Electronic good: Personal computer, CD player...
Does electronic good connect to the cigarette lighter socket?
YES
>> Disconnect the electronic good, and perform once again the DTC confirmation procedure. Refer
to
NO
>> GO TO 2.
2.
CHECK ACCESSORY RELAY FEED BACK INPUT SIGNAL
1.
Turn ignition switch OFF.
2.
Disconnect BCM harness connector M123.
3.
Check voltage between BCM harness connector and ground under the following conditions.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 3.
3.
CHECK ACCESSORY RELAY POWER SUPPLY CIRCUIT
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 4.
NO
>> Check harness open or short between accessory relay and battery.
4.
CHECK FUSE
Check 10A fuse [No. 19, located fuse block (J/B)].
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace fuse.
5.
CHECK ACCESSORY RELAY FEEDBACK CIRCUIT
1.
Check continuity between accessory relay harness connector and BCM harness connector.
2.
Check continuity between accessory relay harness connector and ground.
BCM
Ground
Condition
Voltage (V)
Connector
Terminal
M123
122
Ground
Ignition switch
OFF
0
ACC
Battery voltage
Accessory relay
Ground
Voltage (V)
Terminal
5
Ground
Battery voltage
Accessory relay
BCM
Continuity
Terminal
Connector
Terminal
3
M123
122
Existed
PCS-56
< COMPONENT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
B2611 ACC RELAY
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair harness or connector.
6.
CHECK INTERMITTENT
GI-38, "Intermittent Incident"
>> INSPECTION END
Accessory relay
Ground
Continuity
Terminal
3
Ground
Not existed
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