Infiniti QX4 (R50). Manual — part 577
Diagnostic Procedure
NBTF0022
1
CHECK TRANSFER MOTOR AND TRANSFER MOTOR RELAY
SMT782D
Refer to “Transfer Motor” and “Transfer Motor Relay”, “COMPONENT INSPECTION”, TF-113.
OK or NG
OK
©
GO TO 3.
NG
©
GO TO 2.
2
CHECK CONTINUITY
Check the following.
I
Continuity of transfer sub-harness
Refer to “TRANSFER SWITCH ASSEMBLY SUB-HARNESS CONNECTOR”, “COMPONENT INSPECTION”, TF-114.
OK or NG
OK
©
Repair or replace transfer motor and transfer motor relay.
NG
©
Repair or replace transfer sub-harness.
3
CHECK INPUT SIGNAL
With CONSULT-II
1. Select “MAIN SIGNALS” in Data Monitor.
2. Read out ON/OFF status of “MOTOR RELAY”.
SMT975D
3. When the value is different from standard value although ON/OFF switching occurs, check the following items.
I
PNP switch, throttle position sensor and closed throttle position switch circuits
Refer to AT-99, “DTC P0705 Park/Neutral Position Switch”, AT-176, “DTC P1705 Throttle Position Sensor” and AT-184,
“Closed Throttle Position Switch (idle position)”.
OK or NG
OK
©
GO TO 4.
NG
©
1. Perform transfer control unit input/output signal inspection. Refer to “TRANSFER
CONTROL UNIT INSPECTION TABLE”, “TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION”, TF-55.
2. If NG, recheck transfer control unit pin terminals for damage or loose connection with
harness connector.
TRANSFER MOTOR AND TRANSFER MOTOR RELAY
Diagnostic Procedure
TF-70
4
CHECK TRANSFER MOTOR RELAY POWER SOURCE
1. Disconnect transfer motor relay harness connector.
2. Turn ignition switch to “ON” position.
3. Check voltage between transfer motor relay harness connector terminals 1, 3 and body ground.
Voltage: Battery voltage
SMT854DA
OK or NG
OK
©
GO TO 5.
NG
©
Check the following.
I
No. 55 fuse (20A)
I
No. 18 fuse (10A)
I
Harness continuity between fuse and transfer motor relay
GI
MA
EM
LC
EC
FE
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TRANSFER MOTOR AND TRANSFER MOTOR RELAY
Diagnostic Procedure (Cont’d)
TF-71
5
CHECK HARNESS CONTINUITY
1. Turn ignition switch to “OFF” position.
2. Check continuity between the following terminals.
I
Transfer control unit 41 and Transfer motor 14
I
Transfer control unit 41 and Transfer motor relay 2
I
Transfer control unit 14 and Transfer motor relay 4
I
Transfer motor 15 and body ground
Continuity should exist.
SMT855DA
OK or NG
OK
©
GO TO 6.
NG
©
Repair or replace harness or connector.
6
PERFORM SELF-DIAGNOSIS AGAIN
After driving for a while, perform self-diagnosis again.
Refer to “Trouble Diagnosis without CONSULT-II”, TF-27 and “Trouble Diagnosis with CONSULT-II”, TF-30.
OK or NG
OK
©
INSPECTION END
NG
©
1. Perform transfer control unit input/output signal inspection. Refer to “TRANSFER
CONTROL UNIT INSPECTION TABLE”, “TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION”, TF-55.
2. If NG, recheck transfer control unit pin terminals for damage or loose connection with
harness connector.
TRANSFER MOTOR AND TRANSFER MOTOR RELAY
Diagnostic Procedure (Cont’d)
TF-72
Diagnostic Procedure
NBTF0023
1
CHECK TRANSFER FLUID TEMPERATURE SENSOR
Refer to “2-4WD Shift Solenoid Valve and Transfer Fluid Temperature Sensor”, “COMPONENT INSPECTION”, TF-111.
OK or NG
OK
©
GO TO 3.
NG
©
GO TO 2.
2
CHECK CONTINUITY
Check the following.
I
Continuity of transfer sub-harness
Refer to “TRANSFER TERMINAL CORD ASSEMBLY SUB-HARNESS CONNECTOR”, “COMPONENT INSPECTION”,
TF-114.
OK or NG
OK
©
Repair or replace fluid temperature sensor.
NG
©
Repair or replace transfer sub-harness.
3
CHECK INPUT SIGNAL
WITH CONSULT-II
©
GO TO 4.
WITHOUT CONSULT-II
©
GO TO 5.
GI
MA
EM
LC
EC
FE
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TRANSFER FLUID TEMPERATURE SENSOR
Diagnostic Procedure
TF-73
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