Nissan Leaf. Manual — part 992
PCS
DIAGNOSIS AND REPAIR WORK FLOW
PCS-51
< 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-47, "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 in Service Man-
ual. 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-53, "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
PCS-52
< 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-53, "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.
PCS
B2614 ACC RELAY CIRCUIT
PCS-53
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
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DTC/CIRCUIT DIAGNOSIS
B2614 ACC RELAY CIRCUIT
DTC Logic
INFOID:0000000010120317
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1. Turn power switch to ACC, and wait for 1 second or more.
2. Perform Self Diagnostic Result of BCM with CONSULT.
Is DTC B2614 detected?
YES
>> Go to
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010120318
Regarding Wiring Diagram information, refer to
.
1.
CHECK ACCESSORY RELAY CONTROL SIGNAL
Check voltage between BCM connector M23 and ground.
Is the inspection result normal?
YES
>> Replace BCM. Refer to
BCS-72, "Removal and Installation"
NO
>> GO TO 2.
2.
CHECK ACCESSORY RELAY CONTROL SIGNAL CIRCUIT
1. Turn power switch OFF.
2. Disconnect BCM connector M23.
3. Remove accessory relay.
4. Check continuity between BCM connector M23 and accessory relay.
5. Check continuity between BCM connector M23 and ground.
CONSULT Display
DTC Detection Condition
Possible Cause
ACC RELAY REQ F/B
[B2614]
The following status is compared, and does not
agree for 1 second or more.
• State of accessory relay control judgment in
BCM
• State of accessory relay control signal
• Harness or connectors (Accessory relay con-
trol signal circuit)
• BCM
• Accessory relay
BCM
Ground
Condition
Voltage
(Approx.)
Connector
Terminal
M23
96
—
Power switch OFF
0 - 0.5
Power switch ACC or ON
Battery voltage
BCM
Accessory relay
Continuity
Connector
Terminal
Terminal
M23
96
Coil upstream side
Yes
BCM
Ground
Continuity
Connector
Terminal
M23
96
—
No
PCS-54
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
B2614 ACC RELAY CIRCUIT
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace harness or connectors.
3.
CHECK ACCESSORY RELAY
Perform the accessory relay component inspection. Refer to
PCS-54, "Component Inspection"
Is the inspection result normal?
YES
>> Replace BCM. Refer to
BCS-72, "Removal and Installation"
NO
>> Replace accessory relay.
Component Inspection
INFOID:0000000010120319
1.
CHECK ACCESSORY RELAY
1. Turn power switch OFF.
2. Remove accessory relay.
3. Check continuity between accessory relay terminals.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace accessory relay.
Accessory relay terminals
Condition
Continuity
3 and 5
Battery voltage applied to
terminal 1 and ground to
terminal 2
Yes
Voltage and ground re-
moved
No
PBIB0098E
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