Nissan Leaf. Instruction — part 574
EVC-320
< DTC/CIRCUIT DIAGNOSIS >
P31D3 M/C RELAY
Check harness for short to power, between M/C relay harness connector and A/C relay harness connector.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace error-detected parts.
4.
CHECK M/C RELAY DRIVE CIRCUIT
1. Disconnect VCM harness connector.
2. Check harness for short to ground, between M/C relay harness connector and VCM harness connector.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace error-detected parts.
5.
CHECK A/C RELAY DRIVE CIRCUIT
1. Disconnect VCM harness connector.
2. Check harness for short to power, between A/C relay harness connector and VCM harness connector.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace error-detected parts.
6.
CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to
GI-53, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace VCM. Refer to
EVC-423, "Removal and Installation"
.
NO
>> Repair or replace error-detected parts.
Component Inspection (M/C Relay)
INFOID:0000000010120789
1.
CHECK M/C RELAY
1. Turn power switch OFF.
2. Disconnect M/C relay.
+
−
Voltage
M/C relay
Connector
Terminal
E65
5
Ground
0 V
+
−
Continuity
M/C relay
Connector
Terminal
E65
1
Ground
Not existed
+
−
Voltage
A/C relay
Connector
Terminal
E52
2
Ground
0 V
P31D3 M/C RELAY
EVC-321
< DTC/CIRCUIT DIAGNOSIS >
D
E
F
G
H
I
J
K
L
M
A
B
EVC
N
O
P
3. Check the continuity between M/C relay terminals under the fol-
lowing conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace M/C relay.
Termi-
nals
Conditions
Continu-
ity
3 – 5
12 V direct current supply between terminals 1 and 2
Existed
No current supply
Not ex-
isted
PIIA2636J
EVC-322
< DTC/CIRCUIT DIAGNOSIS >
P31D4 PRE-CHARGE RELAY
P31D4 PRE-CHARGE RELAY
DTC Logic
INFOID:0000000010120790
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 10 seconds.
2. Check DTC.
Is DTC detected?
YES
>> Proceed to
EVC-322, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010120791
1.
CHECK PRE-CHARGE RELAY GROUND CIRCUIT
1. Turn power switch OFF.
2. Disconnect Li-ion battery harness connector.
3. Check the continuity between Li-ion battery harness connector and ground.
Is inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace error-detected parts.
2.
CHECK PRE-CHARGE RELAY DRIVE CIRCUIT-1
Check the resistance between Li-ion battery connector terminals.
Is the inspection result normal?
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P31D4
PRE CHARGE RELAY
(Pre-charge relay)
After operating the power switch from OFF to
READY, a break occurs in the pre-charge relay
drive circuit or resistance remains extremely high
for 2.5 seconds or more.
• Harness or connectors
• Li-ion battery J/B
• VCM
Li-ion battery
Ground
Continuity
Connector
Terminal
B24
10
Ground
Existed
Li-ion battery
Resistance
+
−
Terminal
10
11
Less than 5 k
Ω
P31D4 PRE-CHARGE RELAY
EVC-323
< DTC/CIRCUIT DIAGNOSIS >
D
E
F
G
H
I
J
K
L
M
A
B
EVC
N
O
P
YES
>> GO TO 3.
NO
>> Check the relay circuit of Li-ion battery for malfunction. If no malfunction is found, replace battery
junction box. Refer to
EVB-206, "BATTERY JUNCTION BOX AND BATTERY HARNESS : Disas-
.
3.
CHECK PRE-CHARGE RELAY DRIVE CIRCUIT-2
1. Disconnect VCM harness connector.
2. Check continuity between VCM harness connector and Li-ion battery harness connector.
3. Also check harness for short to power.
Is inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-53, "Intermittent Incident"
.
NO
>> Repair or replace error-detected parts.
+
−
Continuity
VCM
Li-ion battery
Connector
Terminal
Connector
Terminal
E61
40
B89
11
Existed
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