Infiniti QX56 (JA60). Manual — part 285
P1824 TRANSFER MOTOR
DLN-63
< COMPONENT DIAGNOSIS >
[ATX14B]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
Without CONSULT-III
1. Start engine.
2. Check voltage between transfer control unit harness connector
terminal and ground.
MOTOR
RELAY
MON
• Accelerator ped-
al depressed
• Vehicle stopped
• Engine running
• Brake pedal de-
pressed
4WD shift switch: 2WD
OFF
4WD shift switch: AUTO or
4LO (A/T selector lever P or N
position)
OFF
(ON for approx.
2 sec. after
shifting to P and
N.)
4WD shift switch: AUTO or
4LO (Except for A/T selector
lever P or N position)
ON
4WD shift switch: 4H (A/T se-
lector lever P position)
OFF
(ON for approx.
2 sec. after
shifting to P.)
4WD shift switch: 4H (Except
for A/T selector lever P posi-
tion)
ON
Monitored
item
Condition
Display value
(Approx.)
Connector
Terminal
Condition
Voltage (Approx.)
E142
14 -
Ground
• Accelera-
tor pedal
depressed
• Vehicle
stopped
• Engine
running
• Brake
pedal de-
pressed
4WD shift switch:
2WD
Battery voltage
4WD shift switch:
AUTO or 4LO (A/T
selector lever P or N
position)
Battery voltage
(0V for approx. 2
sec. after shifting
to P and N.)
4WD shift switch:
AUTO or 4LO (Ex-
cept for A/T selector
lever P or N position)
0V
4WD shift switch: 4H
(A/T selector lever P
position)
Battery voltage
(0V for approx. 2
sec. after shifting
to P.)
4WD shift switch: 4H
(Except for A/T se-
lector lever P posi-
tion)
0V
SDIA2735E
DLN-64
< COMPONENT DIAGNOSIS >
[ATX14B]
P1824 TRANSFER MOTOR
Are the inspection results normal?
YES
>> GO TO 7.
NO
>> GO TO 2.
2.
CHECK TRANSFER MOTOR RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Connect transfer control unit harness connector.
3. Disconnect transfer motor relay.
4. Check voltage between transfer motor relay harness connector
terminals and ground.
5. Turn ignition switch ON. (Do not start engine.)
6. Check voltage between transfer motor relay harness connector
terminals and ground.
Are the inspection results normal?
YES
>> GO TO 3.
NO
>> Check the following. If any items are damaged, repair
or replace damaged parts.
• 20A fuse (No. 58 located in the fuse and relay box).
• 10A fuse (No. 26 located in the fuse and fusible link box).
• Harness for short or open between battery and transfer motor relay harness connector E154 ter-
minal 5.
• Harness for short or open between transfer shut off relay harness connector E69 terminal 3 and
transfer motor relay harness connector E153 terminal 2.
E143
41 -
Ground
• Accelera-
tor pedal
depressed
• Vehicle
stopped
• Engine
running
• Brake
pedal de-
pressed
4WD shift switch:
2WD
0V
4WD shift switch:
AUTO or 4LO (A/T
selector lever P or N
position)
0V
(Battery voltage
for approx. 2 sec.
after shifting to P
and N.)
4WD shift switch:
AUTO or 4LO (Ex-
cept for A/T selector
lever P or N position)
Battery voltage
4WD shift switch: 4H
(A/T selector lever P
position)
0V
(Battery voltage
for approx. 2 sec.
after shifting to P.)
4WD shift switch: 4H
(Except for A/T se-
lector lever P posi-
tion)
Battery voltage
Connector
Terminal
Condition
Voltage (Approx.)
Connector
Terminal
Voltage (Approx.)
E153
2 - Ground
0V
E154
5 - Ground
Battery voltage
WDIA0169E
Connector
Terminal
Voltage (Approx.)
E153
2 - Ground
Battery voltage
E154
5 - Ground
WDIA0170E
P1824 TRANSFER MOTOR
DLN-65
< COMPONENT DIAGNOSIS >
[ATX14B]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
• Battery and ignition switch.
3.
CHECK TRANSFER MOTOR RELAY
1. Turn ignition switch OFF.
2. Remove transfer motor relay. Refer to
DLN-16, "Component Parts Location"
.
3. Apply 12V direct current between transfer motor relay terminals
1 and 2.
4. Check continuity between relay terminals 3 and 5.
Are the inspection results normal?
YES
>> GO TO 4.
NO
>> Replace the transfer motor relay.
4.
CHECK TRANSFER MOTOR CONTROL CIRCUIT
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Remove transfer motor relay.
3. Disconnect transfer control unit harness connector and transfer motor.
4. Check continuity between the following terminals.
-
Transfer control unit harness connector E142 terminal 14 and
transfer motor relay harness connector E153 terminal 1.
-
Transfer control unit harness connector E143 terminal 41 and
transfer motor relay harness connector E154 terminal 3.
-
Transfer control unit harness connector E143 terminal 41 and
transfer motor harness connector F57 terminal 14.
Also check harness for short to ground and short to power.
Are the inspection results normal?
YES
>> GO TO 5.
NO
>> Repair or replace damaged parts.
5.
CHECK TRANSFER MOTOR GROUND CIRCUIT
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect transfer motor harness connector.
Condition
Continuity
12V direct current supply between terminals 1 and 2
Yes
OFF
No
LDIA0098E
SDIA2738E
Continuity should exist.
WDIA0143E
DLN-66
< COMPONENT DIAGNOSIS >
[ATX14B]
P1824 TRANSFER MOTOR
3. Check continuity between transfer motor harness connector F57
terminal 15 and ground.
Also check harness for short to ground and short to power.
Are the inspection results normal?
YES
>> GO TO 6.
NO
>> Repair open circuit or short to ground or short to power
in harness or connectors.
6.
CHECK TRANSFER MOTOR
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect transfer motor harness connector.
3. Apply 12V direct current between transfer motor terminals 14
and 15.
Does transfer motor operate?
YES
>> GO TO 7.
NO
>> Replace transfer motor. Refer to
.
7.
CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to
Are the inspection results normal?
YES
>> GO TO 8.
NO
>> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
8.
CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
Are the inspection results normal?
YES
>> Inspection End.
NO
>> Replace transfer control unit. Refer to
DLN-130, "Removal and Installation"
.
Component Inspection
INFOID:0000000005148828
TRANSFER MOTOR RELAY
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Remove transfer motor relay. Refer to
DLN-16, "Component Parts Location"
.
3. Apply 12V direct current between transfer motor relay terminals
1 and 2.
4. Check continuity between relay terminals 3 and 5.
5. If inspection results are abnormal replace transfer motor relay.
TRANSFER MOTOR
Continuity should exist.
SDIA2740E
LDIA0097E
Condition
Continuity
12V direct current supply between terminals 1 and 2
Yes
OFF
No
LDIA0098E
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