Infiniti QX56 (JA60). Manual — part 280
P1817 ACTUATOR MOTOR
DLN-43
< COMPONENT DIAGNOSIS >
[ATX14B]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
Are the inspection results normal?
YES
>> GO TO 5.
NO
>> Replace the transfer shut off relay. Refer to
DLN-16, "Component Parts Location"
.
5.
CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND TRANSFER SHIFT RELAY
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the transfer control device (actuator motor) har-
ness connector.
3. Remove transfer shift high relay and transfer shift low relay.
4. Check continuity between the following terminals.
-
Transfer control unit harness connector E143 terminal 33 and
transfer control device (actuator motor) harness connector F58
terminal 21.
-
Transfer control unit harness connector E143 terminal 42 and
transfer control device (actuator motor) harness connector F58
terminal 24.
-
Transfer control unit harness connector E142 (A) terminal 4 and
transfer shift high relay harness connector E46 (B) terminal 1.
-
Transfer control unit harness connector E142 (A) terminal 13
and transfer shift low relay harness connector E47 (C) terminal
1.
-
Transfer control unit harness connector E143 (A) terminal 33
and transfer shift high relay harness connector E46 (B) terminal
3.
-
Transfer control unit harness connector E143 (A) terminal 42
and transfer shift low relay harness connector E47 (C) terminal
3.
Also check harness for short to ground and short to power.
Are the inspection results normal?
YES
>> GO TO 6.
NO
>> Repair or replace damaged parts.
6.
CHECK ACTUATOR MOTOR
1. Remove transfer control device. Refer to
DLN-136, "Removal and Installation"
SDIA2710E
WDIA0314E
Continuity should exist.
WDIA0315E
DLN-44
< COMPONENT DIAGNOSIS >
[ATX14B]
P1817 ACTUATOR MOTOR
2. Check operation by applying battery voltage to transfer control
device (actuator motor) terminals 21 and 24.
CAUTION:
• Do not operate actuator motor for more than 1 second.
• Change the actuator motor position to HIGH when install-
ing.
• Be careful not to overheat the harness.
3. Check resistance between transfer control device (actuator
motor) terminals 21 and 24.
Are the inspection results normal?
YES
>> GO TO 7.
NO
>> Replace transfer control device (actuator motor).
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:0000000005148806
TRANSFER SHIFT RELAY
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Remove transfer shift high relay and transfer shift low relay. Refer to
DLN-16, "Component Parts Loca-
3. Apply 12V direct current between transfer shift relay terminals 1
and 2.
4. Check continuity between relay terminals 3 and 4, 3 and 5.
5. If NG, replace transfer shift relay.
TRANSFER CONTROL DEVICE
1. Remove transfer control device. Refer to
DLN-136, "Removal and Installation"
Terminal
Actuator motor
21 (Battery voltage) - 24 (Ground)
Clockwise rotation
24 (Battery voltage) - 21 (Ground)
Counterclockwise rotation
21 - 24 : Approx. 0.2
Ω
WDIA0224E
SDIA2726E
Terminal
Condition
Continuity
3 - 4
12V direct current supply between terminals 1 and 2
No
OFF
Yes
3 - 5
12V direct current supply between terminals 1 and 2
Yes
OFF
No
WIIA0291E
P1817 ACTUATOR MOTOR
DLN-45
< COMPONENT DIAGNOSIS >
[ATX14B]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
2. Check operation by applying battery voltage to transfer control
device (actuator motor) terminals 21 and 24.
CAUTION:
• Do not operate actuator motor for more than 1 second.
• Change the actuator motor position to HIGH when install-
ing.
• Be careful not to overheat the harness.
3. Check resistance between transfer control device (actuator
motor) terminals 21 and 24.
4. If NG, replace transfer control device (actuator motor).
Terminal
Actuator motor
21 (Battery voltage) - 24 (Ground)
Clockwise rotate
24 (Battery voltage) - 21 (Ground)
Counterclockwise rotate
WDIA0224E
21 - 24 : Approx. 0.2
Ω
SDIA2726E
DLN-46
< COMPONENT DIAGNOSIS >
[ATX14B]
P1818 ACTUATOR POSITION SWITCH
P1818 ACTUATOR POSITION SWITCH
Description
INFOID:0000000005148807
The actuator position switch detects the current actuator motor range. DTC P1818 will set if either of the fol-
lowing occur:
• Improper signal from actuator position switch is input due to open or short circuit.
• Malfunction is detected in actuator position switch.
DTC Logic
INFOID:0000000005148808
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1818 detected?
YES
>> Perform diagnosis procedure. Refer to
.
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000005148809
Regarding Wiring Diagram information, refer to
DLN-89, "Wiring Diagram - ALL-MODE 4WD SYSTEM -"
.
1.
CHECK ACTUATOR POSITION SWITCH SIGNAL
With CONSULT-III
1. Start engine.
2. Select DATA MONITOR mode for ALL MODE AWD/4WD with CONSULT-III.
3. Read out the value of SHIFT POS SW1 and SHIFT POS SW2.
Without CONSULT-III
1. Start engine.
DTC
CONSULT-III
Diagnostic item is detected when...
Reference
[P1818]
SHIFT ACT POSI SW
• Improper signal from actuator position
switch is input due to open or short cir-
cuit.
• Malfunction is detected in the actuator
position switch.
Refer to
.
Monitored item
Condition
Display value
SHIFT POS SW1
• Vehicle stopped
• Engine running
• A/T selector lever
N position
• Brake pedal de-
pressed
4WD shift switch: 4LO
ON
4WD shift switch:
2WD, AUTO or 4H
OFF
SHIFT POS SW2
• Vehicle stopped
• Engine running
• A/T selector lever
N position
• Brake pedal de-
pressed
4WD shift switch: 4H,
AUTO or 2WD
ON
4WD shift switch: 4LO
OFF
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