Nissan Leaf. Instruction — part 538
EVC-176
< DTC/CIRCUIT DIAGNOSIS >
P0AA5 SYSTEM MAIN RELAY -
Is the inspection result normal?
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 HARNESS
1. Disconnect VCM harness connector.
2. Check the continuity between VCM harness connector and Li-ion battery harness connector.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-53, "Intermittent Incident"
.
NO
>> Repair harness or connector.
+
−
Continuity
VCM
Li-ion battery
Connector
terminal
Connector
terminal
E61
28
B89
14
Existed
P0AA6 HIGH VOLTAGE SYSTEM ISOLATION
EVC-177
< DTC/CIRCUIT DIAGNOSIS >
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P0AA6 HIGH VOLTAGE SYSTEM ISOLATION
Description
INFOID:0000000010120633
Li-ion battery is equipped with the IR (Insulation resistance) sensing system. VCM receives the IR sensor sig-
nal sent from Li-ion battery controller and monitors the insulation resistance of the high voltage circuit.
DTC Logic
INFOID:0000000010120634
DTC DETECTION LOGIC
NOTE:
• DTC “P0AA6” is not detected when insulation resistance decreases between quick charge relay and quick
charge port. In this case, insulation check performed by the quick charger becomes NG, resulting in no
implementation of quick charge.
• DTC “P0AA6” is not detected when insulation resistance decreases between normal charge port and PDM
(Power Delivery Module). In this case, the “Fault” lamp of EVSE control box blinks and normal charge does
not start even when trying to perform normal charge.
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. Maintain the following conditions for at least 50 seconds.
2. Check DTC.
Is the DTC detected?
YES
>> Proceed to
EVC-178, "Diagnosis Procedure"
NO
>> GO TO 3.
3.
PERFORM DTC CONFIRMATION PROCEDURE-2
With CONSULT
1. Maintain the following conditions for at least 30 minutes.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P0AA6
HYBRID BATT VOLT SYS
ISOLATION
(Hybrid battery voltage sys-
tem isolation fault)
VCM detects a insulation resistance calculated
based on IR sensor signal sent from Li-ion battery
is 380 k
Ω or less.
• High voltage harness or connectors
• Electric compressor
• PTC heater
• Traction motor
• PDM (Power Delivery Module)
• Li-ion battery
Power switch
READY
Shift position
P range
A/C set temperature
OFF
Power switch
READY
EVC-178
< DTC/CIRCUIT DIAGNOSIS >
P0AA6 HIGH VOLTAGE SYSTEM ISOLATION
2. Check DTC.
Is DTC detected?
YES
>> Proceed to
EVC-178, "Diagnosis Procedure"
NO
>> GO TO 4.
4.
PERFORM DTC CONFIRMATION PROCEDURE-3
With CONSULT
1. Maintain the following conditions for at least 30 minutes.
2. Check DTC.
Is DTC detected?
YES
>> Proceed to
EVC-178, "Diagnosis Procedure"
NO
>> GO TO 5.
5.
PERFORM DTC CONFIRMATION PROCEDURE-4
With CONSULT
1. Shift selector lever in D position.
2. Drive the vehicle at more than 15 km (10 MPH) at least 40 seconds.
CAUTION:
Always drive vehicle at safe speed.
3. Check DTC.
Is DTC detected?
YES
>> Proceed to
EVC-178, "Diagnosis Procedure"
NO
>> GO TO 6.
6.
PERFORM DTC CONFIRMATION PROCEDURE-5
With CONSULT
1. Stop the vehicle and turn power switch OFF.
2. Connect quick charge connector.
3. Perform quick charging (charging status indicator is ON) at least 20 seconds.
4. Check DTC.
Is DTC detected?
YES
>> Proceed to
EVC-178, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010120635
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.
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.
Shift position
P range
A/C set temperature
Full cold
Power switch
READY
Shift position
P range
A/C set temperature
Full hot
P0AA6 HIGH VOLTAGE SYSTEM ISOLATION
EVC-179
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• 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 Instruction. A malfunction may occur if this is not observed.
• Erase DTC after the work is completed.
1.
CHECK HIGH VOLTAGE PART
1. Turn power switch OFF.
2. Visually check that there is no damage in each high voltage part.
Is the inspection result normal?
YES
>> GO TO 2
NO
>> Repair or replace the error-detected part.
2.
IDENTIFY THE MODE USED AT THE OCCURRENCE OF MALFUNCTION
On which DTC Confirmation Procedure is the DTC P0AA6 detected?
DTC Confirmation Procedure-1>>GO TO 12.
DTC Confirmation Procedure-2>>GO TO 3.
DTC Confirmation Procedure-3>>GO TO 6.
DTC Confirmation Procedure-4>>GO TO 8.
DTC Confirmation Procedure-5>>GO TO 10.
3.
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 4.
Standard
: 5 V or less
JPCIA0296ZZ
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