Nissan Leaf. Manual — part 580
EVC-344
< DTC/CIRCUIT DIAGNOSIS >
P31E0 HIGH VOLTAGE CIRCUIT INTERLOCK ERROR
P31E0 HIGH VOLTAGE CIRCUIT INTERLOCK ERROR
Description
INFOID:0000000010120808
The connection detecting circuit is used to detect the connection status of the PDM (Power Delivery Module)
cover and the bus bar cover of PDM (Power Delivery Module).
The connection detecting circuit consists of two circuits (i.e. power supply circuit and signal input circuit).
When the PDM (Power Delivery Module) cover and the bus bar cover are installed normally, their protrusions
press the internal switch of PDM (Power Delivery Module). Accordingly, the connection detecting circuit is
energized and a voltage signal is input.
DTC Logic
INFOID:0000000010120809
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-1
With CONSULT
1. Turn power switch ON at least 5 seconds.
2. Check self-diagnostic result.
Is DTC detected?
YES
>> Proceed to
EVC-344, "Diagnosis Procedure"
NO
>> GO TO 3.
3.
PERFORM DTC CONFIRMATION PROCEDURE-2
With CONSULT
1. Set the vehicle to READY at least 10 seconds.
2. Check self-diagnostic result.
Is DTC detected?
YES
>> Proceed to
EVC-344, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010120810
DANGER:
Since hybrid vehicles and electric vehicles contain a high voltage battery, there is the risk of
electric shock, electric leakage, or similar accidents if the high voltage component and vehicle are
handled incorrectly. Be sure to follow the correct work procedures when performing inspection and
maintenance.
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P31E0
HV SYSTEM INTERLOCK
ERROR
(High voltage system inter-
lock error)
VCM detects an excessively low voltage of the connection
detecting circuit for 2.5 seconds during READY.
• Harness or connectors
(Connection detection circuit
is open or shorted.)
• PDM (Power Delivery Mod-
ule)
VCM detects an excessively low voltage of the connection
detecting circuit for 0.5 seconds during power switch ON.
P31E0 HIGH VOLTAGE CIRCUIT INTERLOCK ERROR
EVC-345
< DTC/CIRCUIT DIAGNOSIS >
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WARNING:
• Be sure to remove the service plug in order to disconnect the high voltage circuits before perform-
ing inspection or maintenance of high voltage system harnesses and parts.
• To prevent the removed service plug from being connected by mistake during the procedure, always
carry it in your pocket or put it in the tool box.
• Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses
before beginning work on the high voltage system.
• Clearly identify the persons responsible for high voltage work and ensure that other persons do not
touch the vehicle. When not working, cover high voltage parts with an insulating cover sheet or sim-
ilar item to prevent other persons from contacting them.
• Refer to
EVC-10, "High Voltage Precautions"
CAUTION:
• Never bring the vehicle into the READY status with the service plug removed unless otherwise
instructed in the Service Manual. A malfunction may occur if this is not observed.
• Erase DTC after the work is completed.
1.
OVERALL FUNCTION CHECK
With CONSULT
1. On the CONSULT screen, select “EV/HEV” >> “DATA MONITOR” >> “HV INTERLOCK (DC/DC)”.
2. Check that “On” is displayed.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-53, "Intermittent Incident"
.
NO
>> GO TO 2.
2.
PRECONDITIONING
WARNING:
Disconnect high voltage. Refer to
GI-33, "How to Disconnect High Voltage"
Check voltage in high voltage circuit. (Check that condenser are discharged.)
1. Lift up the vehicle and remove the Li-ion battery under covers. Refer to
2. Disconnect high voltage harness connector and PTC heater harness connector from front side of Li-ion
battery. Refer to
EVB-181, "Removal and Installation"
.
3. Measure voltage between high voltage harness connector terminals and PTC heater harness connector
terminals.
DANGER:
Touching high voltage components without using the appropriate protective equipment will
cause electrocution.
CAUTION:
For voltage measurements, use a tester which can measure to 500 V or higher.
>> GO TO 3.
3.
CHECK CONNECTION DETECTING CIRCUIT POWER SUPPLY
Standard
: 5 V or less
JPCIA0296ZZ
EVC-346
< DTC/CIRCUIT DIAGNOSIS >
P31E0 HIGH VOLTAGE CIRCUIT INTERLOCK ERROR
1. Disconnect PDM (Power Delivery Module) harness connector.
2. Reconnect 12V battery negative terminal.
3. Turn power switch ON.
4. Check the voltage between PDM (Power Delivery Module) harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 4.
4.
CHECK CONNECTION DETECTING CIRCUIT POWER SUPPLY CIRCUIT
1. Turn power switch OFF.
2. Disconnect VCM harness connector.
3. Check the harness for short to power, between PDM (Power Delivery Module) harness connector and
VCM harness connector.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace error-detected parts.
5.
CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to
GI-53, "Intermittent Incident"
.
Inspection result normal?
YES
>> Replace VCM. Refer to
EVC-423, "Removal and Installation"
.
NO
>> Repair or replace error-detected parts.
6.
CHECK CONNECTION DETECTING CIRCUIT SIGNAL CIRCUIT
1. Turn power switch OFF.
2. Disconnect VCM harness connector.
3. Check the harness for short to power, between PDM (Power Delivery Module) harness connector and
VCM harness connector.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace error-detected parts.
7.
CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to
GI-53, "Intermittent Incident"
.
Inspection result normal?
YES
>> GO TO 8.
NO
>> Repair or replace error-detected parts.
8.
REPLACE VCM
+
−
Voltage
PDM (Power Delivery Module)
Connector
Terminal
F23
12
Ground
3 – 7 V
+
−
Voltage
PDM (Power Delivery Module)
Connector
Terminal
F23
12
Ground
0 V
+
−
Voltage
PDM (Power Delivery Module)
Connector
Terminal
F23
15
Ground
0 V
P31E0 HIGH VOLTAGE CIRCUIT INTERLOCK ERROR
EVC-347
< DTC/CIRCUIT DIAGNOSIS >
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1. Replace VCM. Refer to
EVC-423, "Removal and Installation"
.
2. Reconnect harness connector and parts disconnected.
3. Perform DTC Confirmation Procedure. Refer to
.
Is DTC P31E0 detected again?
YES
>> Replace PDM (Power Delivery Module). Refer to
VC-112, "Removal and Installation"
NO
>> INSPECTION END
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