Nissan Leaf. Manual — part 576
EVC-328
< DTC/CIRCUIT DIAGNOSIS >
P31D5 PRE-CHARGE RELAY
with heat pump system
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Replace malfunctioning harness. And then, GO TO 10.
9.
CHECK PDM (POWER DELIVERY MODULE)
Check the short circuit between PDM (Power Delivery Module) terminals.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Replace PDM (Power Delivery Module). And then, GO TO 10. Refer to
10.
REPLACE BATTERY JUNCTION BOX
Replace battery junction box. Refer to
EVB-206, "BATTERY JUNCTION BOX AND BATTERY HARNESS :
>> INSPECTION END
Connected to:
PDM (Power Delivery Module)
Resistance
Connector
+
−
Terminal
Electric compressor
H7
41
42
3 k
Ω or more
PDM (Power Delivery Module)
Resistance
+
−
Terminal
38
39
3 k
Ω or more
P31D6 F/S RELAY
EVC-329
< DTC/CIRCUIT DIAGNOSIS >
D
E
F
G
H
I
J
K
L
M
A
B
EVC
N
O
P
P31D6 F/S RELAY
DTC Logic
INFOID:0000000010120794
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
• Turn power switch OFF and wait at least 90 seconds.
CAUTION:
During this period, never perform vehicle handling such as opening and closing of doors. If some
kind of vehicle handling is performed, then wait another 90 seconds or more from the time of the
vehicle handling.
• Make sure that 12V battery voltage is 11 V or more.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1. Turn power switch ON and wait at least 5 seconds.
2. Check DTC.
Is DTC detected?
YES
>> Proceed to
EVC-329, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010120795
1.
CHECK F/S RELAY OUTPUT VOLTAGE-1
1. Turn power switch OFF.
2. Check the voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-53, "Intermittent Incident"
.
NO
>> GO TO 2.
2.
CHECK F/S RELAY DRIVE CIRCUIT VOLTAGE-1
Check the voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P31D6
F/S RELAY
(Fail-safe relay)
VCM detected the F/S relay stuck
• Harness or connectors
• IPDM E/R
• VCM
+
−
Voltage
IPDM E/R
Connector
Terminal
E15
55
Ground
0 V
+
−
Voltage
IPDM E/R
Connector
Terminal
E15
60
Ground
12V battery volt-
age
EVC-330
< DTC/CIRCUIT DIAGNOSIS >
P31D6 F/S RELAY
YES
>> GO TO 5.
NO
>> GO TO 3.
3.
CHECK F/S RELAY DRIVE CIRCUIT VOLTAGE-2
1. Disconnect VCM harness connector.
2. Check the voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES
>> Replace VCM. Refer to
EVC-423, "Removal and Installation"
.
NO
>> GO TO 4.
4.
CHECK F/S RELAY DRIVE CIRCUIT
1. Disconnect IPDM E/R harness connector.
2. Check harness for short to ground, between VCM harness connector and IPDM E/R harness connector.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-53, "Intermittent Incident"
.
NO
>> Repair or replace error-detected parts.
5.
CHECK F/S RELAY OUTPUT VOLTAGE-2
1. Disconnect IPDM E/R harness connector.
2. Check the voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
PCS-29, "Removal and Installation"
NO
>> GO TO 6.
6.
CHECK F/S RELAY OUTPUT VOLTAGE-3
1. Disconnect VCM harness connector.
2. Check the voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES
>> Replace VCM. Refer to
EVC-423, "Removal and Installation"
.
NO
>> Check harness for short to power, between VCM harness connector and IPDM E/R harness con-
nector.
+
−
Voltage
IPDM E/R
Connector
Terminal
E15
60
Ground
12V battery volt-
age
+
−
Continuity
IPDM E/R
Connector
Terminal
E15
60
Ground
Not existed
+
−
Voltage
IPDM E/R
Connector
Terminal
E15
55
Ground
0 V
+
−
Voltage
IPDM E/R
Connector
Terminal
E15
55
Ground
0 V
P31D7 F/S RELAY
EVC-331
< DTC/CIRCUIT DIAGNOSIS >
D
E
F
G
H
I
J
K
L
M
A
B
EVC
N
O
P
P31D7 F/S RELAY
DTC Logic
INFOID:0000000010120796
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
• Turn power switch OFF and wait at least 90 seconds.
CAUTION:
During this period, never perform vehicle handling such as opening and closing of doors. If some
kind of vehicle handling is performed, then wait another 90 seconds or more from the time of the
vehicle handling.
• Make sure that 12V battery voltage is 11 V or more.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1. Set the vehicle to READY and wait at least 5 seconds.
2. Check DTC.
Is DTC detected?
YES
>> Proceed to
EVC-331, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010120797
1.
CHECK FUSE
1. Turn power switch OFF.
2. Pull out #64 fuse.
3. Make sure that fuse is not fusing.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace the fuse after repairing the applicable circuit.
2.
CHECK 12V BATTERY POWER SUPPLY
1. Insert the fuse which pulled out.
2. Disconnect IPDM E/R harness connector (E9).
3. Check the voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Check 12V battery power supply routing circuit.
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P31D7
F/S RELAY
(Fail-safe relay)
VCM detected the F/S relay open
• Harness or connectors
• IPDM E/R
• VCM
+
−
Voltage
IPDM E/R
Connector
Terminal
E9
2
Ground
12V battery volt-
age
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