Nissan Leaf. Instruction — part 535
EVC-164
< DTC/CIRCUIT DIAGNOSIS >
P0AA1 SYSTEM MAIN RELAY +
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.
• 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 SYSTEM MAIN RELAY DRIVE POWER VOLTAGE
1. Turn power switch OFF.
2. Disconnect Li-ion battery harness connector.
3. Check the voltage between Li-ion battery harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK SYSTEM MAIN RELAY DRIVE CIRCUIT
1. Disconnect VCM harness connector.
2. Check harness for short to power, between Li-ion battery harness connector and VCM harness connector.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-53, "Intermittent Incident"
.
NO
>> Repair or replace error-detected parts.
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
Relay
+
−
Voltage
Li-ion battery
Connector
Terminal
System main relay 1
B89
17
Ground
0 V
System main relay 2
14
Pre-charge relay
11
+
−
Voltage
Li-ion battery
Connector
Terminal
B89
17
Ground
0 V
14
11
P0AA1 SYSTEM MAIN RELAY +
EVC-165
< DTC/CIRCUIT DIAGNOSIS >
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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.
4.
CHECK ELECTRIC COMPRESSOR
1. Disconnect electric compressor high voltage harness connector.
2. Check the short circuit between electric compressor terminals.
With heat pump system
Without heat pump system
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace electric compressor. And then, GO TO 9. Refer to
HA-37, "Removal and Installation"
HA-95, "Removal and Installation"
(Without heat pump system).
5.
CHECK PTC HEATER
1. Disconnect Li-ion battery harness connector (H19).
2. Check the short circuit between Li-ion battery terminals.
Standard
: 5 V or less
JPCIA0296ZZ
Electric compressor
Resistance
+
−
Terminal
1
2
3 k
Ω or more
Electric compressor
Resistance
+
−
Terminal
1
3
3 k
Ω or more
EVC-166
< DTC/CIRCUIT DIAGNOSIS >
P0AA1 SYSTEM MAIN RELAY +
With heat pump system
Without heat pump system
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace PTC heater. And then, GO TO 9. Refer to
HAC-198, "Removal and Installation"
[(Auto A/
C (with heat pump)] or
HAC-359, "Removal and Installation"
[(Auto A/C (without heat pump)].
6.
CHECK HIGH VOLTAGE HARNESS-1
1. Disconnect Li-ion battery harness connector (H3).
2. Check the short circuit between Li-ion battery harness connector terminals.
With heat pump system
Without heat pump system
Is the inspection result normal?
YES
>> The high voltage harness within Li-ion battery may be shorted. Check the related circuits. And
then, GO TO 9.
NO
>> GO TO 7.
7.
CHECK TRACTION MOTOR INVERTER
1. Remove PDM (Power Delivery Module). Refer to
VC-112, "Removal and Installation"
2. Check the short circuit between traction motor inverter termi-
nals.
Is the inspection result normal?
YES
>> GO TO 8.
Connected to:
Li-ion battery
Resistance
Connector
+
−
Terminal
PTC heater
H19
40
41
3 k
Ω or more
Connected to:
Li-ion battery
Resistance
Connector
+
−
Terminal
PTC heater
H19
40
41
3 k
Ω or more
Connected to:
Li-ion battery
Resistance
Connector
+
−
Terminal
PDM (Power Delivery
Module)
H3
37
38
3 k
Ω or more
Connected to:
Li-ion battery
Resistance
Connector
+
−
Terminal
PDM (Power Delivery
Module)
H3
37
38
3 k
Ω or more
Resistance
: more than 3 k
Ω
JSCIA0696ZZ
P0AA1 SYSTEM MAIN RELAY +
EVC-167
< DTC/CIRCUIT DIAGNOSIS >
D
E
F
G
H
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B
EVC
N
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NO
>> Replace traction motor inverter. And then, GO TO 9. Refer to
TMS-103, "Removal and Installa-
.
8.
CHECK HIGH VOLTAGE HARNESS-2
1. Remove high voltage harness from PDM (Power Delivery Module). Refer to
.
2. Check the short circuit between high voltage harness connector (Li-ion battery side) and high voltage har-
ness connector [PDM (Power Delivery Module) side].
With heat pump system
Without heat pump system
3. Check the short circuit between high voltage harness connector (electric compressor side) and high volt-
age harness connector [PDM (Power Delivery Module) side].
with heat pump system
Without heat pump system
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Replace malfunctioning harness. And then, GO TO 9.
9.
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
Li-ion battery
H5
38
39
3 k
Ω or more
Connected to:
PDM (Power Delivery Module)
Resistance
Connector
+
−
Terminal
Li-ion battery
H18
38
39
3 k
Ω or more
Connected to:
PDM (Power Delivery Module)
Resistance
Connector
+
−
Terminal
Electric compressor
H22
42
41
3 k
Ω or more
Connected to:
PDM (Power Delivery Module)
Resistance
Connector
+
−
Terminal
Electric compressor
H7
41
42
3 k
Ω or more
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