Nissan Leaf. Instruction — part 1193
P0A44 DRIVE MOTOR A OVER SPEED
TMS-53
< DTC/CIRCUIT DIAGNOSIS >
D
E
F
G
H
I
J
K
L
M
A
B
TMS
N
O
P
P0A44 DRIVE MOTOR A OVER SPEED
DTC Logic
INFOID:0000000010120937
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always power switch OFF and wait
at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
CHECK DTC DETECTION
With CONSULT
1. Set the vehicle to READY and wait for 10 seconds or more.
2. Accelerate to 60 km/h (37 MPH).
3. Stop the vehicle.
4. Check DTC.
Is “P0A44” detected?
YES
>> Go to
.
NO-1 >> To check malfunction symptom before repair: Refer to
GI-53, "Intermittent Incident"
NO-2 >> Confirmation after repair: INSPECTION END
Diagnosis Procedure
INFOID:0000000010120938
1.
CHECK TRACTION MOTOR INVERTER HARNESS CONNECTOR
1. Power switch OFF.
2. Check the connection conditions of the traction motor inverter harness connector.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace damaged parts.
2.
CHECK TRACTION MOTOR HARNESS CONNECTOR
Check the connection conditions of the traction motor harness connector.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace damaged parts.
3.
CHECK TRACTION MOTOR RESOLVER CIRCUIT
1. Disconnect the traction motor inverter harness connector.
2. Check the resistance between traction motor inverter vehicle side harness connector terminals and
ground.
DTC
CONSULT screen terms
(Trouble diagnosis content)
Malfunction detected condition
Possible causes
P0A44
DRIVE MOTOR A OVER SPEED
(Drive Motor “A” Position Sensor
Circuit Overspeed)
If the value detected for motor speed at
the traction motor resolver is too high
• Harness or connectors
(Each circuit is open or shorted.)
• Traction motor
• Traction motor inverter
TMS-54
< DTC/CIRCUIT DIAGNOSIS >
P0A44 DRIVE MOTOR A OVER SPEED
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace damaged parts.
4.
CHECK TRACTION MOTOR RESOLVER CIRCUIT
1. Disconnect the traction motor harness connector.
2. Check the resistance between traction motor inverter vehicle side harness connector terminals and trac-
tion motor vehicle side harness connector terminals.
3. Check the harness for short.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace damaged parts.
5.
CHECK TRACTION MOTOR RESOLVER
Check the traction motor resolver. Refer to
TMS-54, "Component Inspection (Traction Motor Resolver)"
.
Is the inspection result normal?
YES
>> Replace the traction motor inverter. Refer to
TMS-103, "Removal and Installation"
.
NO
>> Replace the traction motor. Refer to
TMS-109, "Removal and Installation"
Component Inspection (Traction Motor Resolver)
INFOID:0000000010120939
1.
CHECK TRACTION MOTOR RESOLVER
1. Disconnect the traction motor connector.
2. Check the resistance between traction motor connector terminals.
Traction motor inverter
Ground
Resistance
Connector
Terminal
F13
17
Ground
100 k
Ω or more
18
19
20
21
27
Traction motor inverter
Traction motor
Resistance
Connector
Terminal
Connector
Terminal
F13
17
F14
6
1
Ω or less
18
7
19
5
20
1
21
8
27
2
Traction motor inverter
Resistance
Connector
Terminal
F13
17
18
100 k
Ω or more
20
21
19
27
P0A44 DRIVE MOTOR A OVER SPEED
TMS-55
< DTC/CIRCUIT DIAGNOSIS >
D
E
F
G
H
I
J
K
L
M
A
B
TMS
N
O
P
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace the traction motor due to malfunction in the traction motor resolver. Refer to
.
Traction motor connector
Resistance
Terminal
1
8
20 – 35
Ω
2
5
8 – 15
Ω
6
7
20 – 35
Ω
TMS-56
< DTC/CIRCUIT DIAGNOSIS >
P0A78 DRIVE MOTOR A INVERTER
P0A78 DRIVE MOTOR A INVERTER
DTC Logic
INFOID:0000000010120940
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always power switch OFF and wait
at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
CHECK DTC DETECTION
With CONSULT
1. Power switch ON and wait for 10 seconds or more.
2. Check DTC.
Is “P0A78” detected?
YES
>> Go to
NO-1 >> To check malfunction symptom before repair: Refer to
GI-53, "Intermittent Incident"
.
NO-2 >> Confirmation after repair: INSPECTION END
Diagnosis Procedure
INFOID:0000000010120941
1.
REPLACE TRACTION MOTOR INVERTER
Replace the traction motor inverter. Refer to
TMS-103, "Removal and Installation"
.
>> END
DTC
CONSULT screen terms
(Trouble diagnosis content)
Malfunction detected condition
Possible cause
P0A78
DRIVE MOTOR A INVERTER
(Drive Motor “A” Inverter Perfor-
mance)
A malfunction is detected in the
traction motor inverter (motor con-
troller)
Traction motor inverter
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