Nissan Leaf. Instruction — part 537
EVC-172
< DTC/CIRCUIT DIAGNOSIS >
P0AA4 SYSTEM MAIN RELAY -
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"
(With heat pump system) or
HA-95, "Removal and Installation"
5.
CHECK PTC HEATER
1. Disconnect Li-ion battery harness connector (H19).
2. Check the short circuit between Li-ion battery terminals.
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
Standard
: 5 V or less
Electric compressor
Resistance
+
−
Terminal
1
2
3 k
Ω or more
Electric compressor
Resistance
+
−
Terminal
1
3
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
PTC heater
H19
40
41
3 k
Ω or more
P0AA4 SYSTEM MAIN RELAY -
EVC-173
< DTC/CIRCUIT DIAGNOSIS >
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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.
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
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
Connected to:
PDM (Power Delivery Module)
Resistance
Connector
+
−
Terminal
Li-ion battery
H5
38
39
3 k
Ω or more
EVC-174
< DTC/CIRCUIT DIAGNOSIS >
P0AA4 SYSTEM MAIN RELAY -
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
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
P0AA5 SYSTEM MAIN RELAY -
EVC-175
< DTC/CIRCUIT DIAGNOSIS >
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P0AA5 SYSTEM MAIN RELAY -
DTC Logic
INFOID:0000000010120631
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 wait at least 10 seconds.
2. Check self-diagnostic result.
Is DTC detected?
YES
>> Proceed to
EVC-175, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010120632
1.
CHECK SYSTEM MAIN 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 the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace error-detected parts.
2.
CHECK SYSTEM MAIN RELAY CIRCUIT
Check continuity between Li-ion battery connector terminals.
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P0AA5
HYBRID BATT NEGATIVE
CONTACTOR
(Hybrid battery negative
contactor circuit stuck
open)
VCM detects a break in the drive circuit of the sys-
tem main relay or an extremely high resistance for
2.5 seconds or more when the F/S relay is ON
with the system main relay OFF.
• Harness or connectors
• Battery J/B
+
−
Continuity
Li-ion battery
Connector
terminal
B89
13
Ground
Existed
Li-ion battery
Continuity
terminals
13
14
Existed
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