Infiniti QX56 (JA60). Manual — part 279
P1816 TRANSMISSION RANGE SWITCH
DLN-39
< COMPONENT DIAGNOSIS >
[ATX14B]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
P1816 TRANSMISSION RANGE SWITCH
Description
INFOID:0000000005148800
The transmission range switch transmits the A/T position indicator signal (transmission range switch signal)
via CAN communication to the transfer control unit. DTC P1816 will set when the transmission range switch
signal is malfunctioning or there is a communication error.
DTC Logic
INFOID:0000000005148801
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1816 displayed?
YES
>> Perform diagnosis procedure. Refer to
.
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000005148802
1.
CHECK DTC WITH TCM
Perform self-diagnosis with TCM. Refer to
TM-32, "CONSULT-III Function (TRANSMISSION)"
.
Is any malfunction detected by self-diagnosis?
YES
>> Check the malfunctioning system.
NO
>> GO TO 2.
2.
CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to
Are inspection results normal?
YES
>> GO TO 3.
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.
3.
CHECK DTC
Drive the vehicle and then perform self-diagnosis.
Are inspection results normal?
YES
>> Inspection End.
NO
>> Perform self-diagnosis with TCM again.
DTC
CONSULT-III
Diagnostic item is detected when...
Reference
[P1816]
PNP SW/CIRC
When transmission range switch signal
is malfunctioning or communication er-
ror between the control units.
DLN-40
< COMPONENT DIAGNOSIS >
[ATX14B]
P1817 ACTUATOR MOTOR
P1817 ACTUATOR MOTOR
Description
INFOID:0000000005148803
The actuator motor receives signals from the transfer control unit and controls shift rods which shift the trans-
fer case. DTC P1817 will set when any of the following occur:
• Motor does not operate properly due to open or short circuit in actuator motor.
• Malfunction is detected in the actuator motor. (When 4WD shift switch is operated and actuator motor does
not operate)
• Malfunction is detected in transfer shift high relay or transfer shift low relay.
DTC Logic
INFOID:0000000005148804
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1817 detected?
YES
>> Perform diagnosis procedure. Refer to
.
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000005148805
Regarding Wiring Diagram information, refer to
DLN-89, "Wiring Diagram - ALL-MODE 4WD SYSTEM -"
.
1.
CHECK ACTUATOR MOTOR 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 ACT1, SHIFT AC MON1, SHIFT ACT2 and SHIFT AC MON2.
DTC
CONSULT-III
Diagnostic item is detected when...
Reference
[P1817]
SHIFT ACTUATOR
• Motor does not operate properly due
to open or short circuit in actuator mo-
tor.
• Malfunction is detected in the actuator
motor. (When 4WD shift switch is op-
erated and actuator motor is not oper-
ated)
• Malfunction is detected in transfer shift
high relay and transfer shift low relay.
Refer to
.
Monitored
item
Condition
Display
value
SHIFT ACT1
• Vehicle stopped
• Engine running
• A/T selector lever N position
• Brake pedal depressed
4WD shift switch: 4H
to 4LO (Wait function
is operating.)
ON
Except the above
OFF
SHIFT AC
MON1
• Vehicle stopped
• Engine running
• A/T selector lever N position
• Brake pedal depressed
4WD shift switch: 4H
to 4LO (Wait function
is operating.)
ON
Except the above
OFF
P1817 ACTUATOR MOTOR
DLN-41
< 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.
Are the inspection results normal?
YES
>> GO TO 7.
NO
>> GO TO 2.
2.
CHECK ACTUATOR MOTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Remove transfer shift high relay and transfer shift low relay.
SHIFT ACT2
• Vehicle stopped
• Engine running
• A/T selector lever N position
• Brake pedal depressed
4WD shift switch:
4LO to 4H (Wait func-
tion is operating.)
ON
Except the above
OFF
SHIFT AC
MON2
• Vehicle stopped
• Engine running
• A/T selector lever N position
• Brake pedal depressed
4WD shift switch:
4LO to 4H (Wait func-
tion is operating.)
ON
Except the above
OFF
Connector
Terminal
Condition
Voltage
(Approx.)
E142
4 -
Ground
• Vehicle stopped
• Engine running
• A/T selector lever
N position
• Brake pedal de-
pressed
4WD shift switch: 4H to
4LO (Wait function is
operating.)
Battery
voltage
Except the above
0V
13 -
Ground
• Vehicle stopped
• Engine running
• A/T selector lever
N position
• Brake pedal de-
pressed
4WD shift switch: 4LO
to 4H (Wait function is
operating.)
Battery
voltage
Except the above
0V
E143
33 -
Ground
• Vehicle stopped
• Engine running
• A/T selector lever
N position
• Brake pedal de-
pressed
4WD shift switch: 4H to
4LO (Wait function is
operating.)
Battery
voltage
Except the above
0V
42 -
Ground
• Vehicle stopped
• Engine running
• A/T selector lever
N position
• Brake pedal de-
pressed
4WD shift switch: 4LO
to 4H (Wait function is
operating.)
Battery
voltage
Except the above
0V
Monitored
item
Condition
Display
value
SDIA2705E
DLN-42
< COMPONENT DIAGNOSIS >
[ATX14B]
P1817 ACTUATOR MOTOR
3. Check voltage between transfer shift high relay harness connec-
tor E46 terminal 5 (A), transfer shift low relay harness connector
E47 terminal 5 (B) and ground.
4. Turn ignition switch ON. (Do not start engine.)
5. Check voltage between transfer shift high relay harness connec-
tor E46 terminal 5 (A), transfer shift low relay harness connector
E47 terminal 5 (B) 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. 57, located in the fuse and relay box).
• Harness for short or open between battery, transfer shift high relay harness connector terminal 5
and transfer shift low relay harness connector terminal 5.
3.
CHECK ACTUATOR MOTOR GROUND CIRCUIT
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. Check continuity between transfer shift high relay harness con-
nector E46 terminals 2, 4 (A) and transfer shift low relay harness
connector E47 terminals 2, 4 (B) and ground.
Also check harness for short to ground and short to power.
Are the inspection results normal?
YES
>> GO TO 4.
NO
>> Repair open circuit or short to ground or short to power
in harness or connectors.
4.
CHECK TRANSFER SHIFT RELAY
1. Turn ignition switch OFF.
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.
Connector
Terminal
Voltage (Approx.)
A: E46
5 - Ground
Battery voltage
B: E47
5 - Ground
WDIA0310E
Connector
Terminal
Voltage (Approx.)
A: E46
5 - Ground
Battery voltage
B: E47
5 - Ground
WDIA0311E
Continuity should exist.
WDIA0312E
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
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