Infiniti QX4 (R50). Manual — part 47
SAT341H
Description
NBAT0068
The overrun clutch solenoid valve is activated by the TCM in
response to signals sent from the inhibitor switch, overdrive con-
trol switch, vehicle speed and throttle position sensors. The over-
run clutch operation will then be controlled.
TCM TERMINALS AND REFERENCE VALUE
NBAT0068S02
Remarks: Specification data are reference values.
Terminal
No.
Wire color
Item
Condition
Judgement
standard
(Approx.)
20
L/B
Overrun clutch
solenoid valve
When overrun clutch solenoid valve operates.
Battery volt-
age
When overrun clutch solenoid valve does not
operate.
0V
ON BOARD DIAGNOSIS LOGIC
NBAT0068S03
Diagnostic trouble code
Malfunction is detected when ...
Check item (Possible cause)
: O/R CLTCH SOL/CIRC
TCM detects an improper voltage drop
when it tries to operate the solenoid
valve.
I
Harness or connectors
(The solenoid circuit is open or shorted.)
I
Overrun clutch solenoid valve
: P1760
SAT014K
SAT020K
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NBAT0068S01
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCE-
DURE” has been previously conducted, always turn ignition
switch “OFF” and wait at least 5 seconds before conducting
the next test.
TESTING CONDITION:
Always drive vehicle on a level road to improve accuracy of
test.
After the repair, perform the following procedure to confirm the
malfunction is eliminated.
With CONSULT-II
1)
Turn ignition switch “ON” and select “DATA MONITOR” mode
for “ENGINE” with CONSULT-II.
2)
Start engine.
3)
Accelerate vehicle to a speed of more than 10 km/h (6MPH)
in “D” position (OD “ON”).
4)
Release accelerator pedal completely in “D” position (OD
“OFF”).
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1760 OVERRUN CLUTCH SOLENOID VALVE
Description
AT-185
With GST
Follow the procedure “With CONSULT-II”.
DTC P1760 OVERRUN CLUTCH SOLENOID VALVE
Description (Cont’d)
AT-186
Wiring Diagram — AT — OVRCSV
NBAT0200
MAT741A
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1760 OVERRUN CLUTCH SOLENOID VALVE
Wiring Diagram — AT — OVRCSV
AT-187
Diagnostic Procedure
NBAT0069
1
CHECK VALVE RESISTANCE
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord assembly connector on the right side of transfer assembly.
3. Check resistance between terminal 4 and ground.
SAT170J
Is resistance approx. 20 - 40
Ω
?
Yes
©
GO TO 3.
No
©
GO TO 2.
2
CHECK VALVE OPERATION
1. Remove control valve assembly.
Refer to AT-273.
2. Check the following items:
I
Overrun clutch solenoid valve
Refer to “Component Inspection”, AT-189.
I
Harness of terminal cord assembly for short or open
OK or NG
OK
©
GO TO 3.
NG
©
Repair or replace damaged parts.
3
CHECK POWER SOURCE CIRCUIT
1. Turn ignition switch to “OFF” position.
2. Disconnect TCM harness connector.
3. Check resistance between terminal 4 and TCM harness connector terminal 20. Refer to wiring diagram — AT —
OVRCSV.
Continuity should exist.
If OK, check harness for short to ground and short to power.
4. Reinstall any part removed.
OK or NG
OK
©
GO TO 4.
NG
©
Repair open circuit or short to ground or short to power in harness or connectors.
4
CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-185.
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 5.
DTC P1760 OVERRUN CLUTCH SOLENOID VALVE
Diagnostic Procedure
AT-188
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