Nissan Terrano r20e. Manual — part 18
Overrun Clutch Solenoid Valve
DESCRIPTION
The overrun clutch solenoid valve is activated by the TCM in
response to signals sent from the park/neutral position switch, over-
drive control switch, vehicle speed and throttle (accelerator) posi-
tion sensors. The overrun clutch operation will then be controlled.
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code
Malfunction is detected when ...
Check items
(Possible cause)
:
OVERRUN CLUTCH S/V
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
:
6th judgement flicker
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE
After the repair, perform the following procedure to confirm the
malfunction is eliminated.
1)
Start engine.
2)
Select “SELF-DIAG RESULTS” mode with CONSULT-II.
3)
Drive vehicle under the following conditions:
Selector lever in “D” position, overdrive control switch in
“OFF” position and vehicle speed higher than 10 km/h (6
MPH).
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1)
Start engine.
2)
Drive vehicle under the following conditions:
Selector lever in “D” position, overdrive control switch in
“OFF” position and vehicle speed higher than 10 km/h (6
MPH).
3)
Perform self-diagnosis.
Refer to SELF-DIAGNOSTIC PROCEDURE (Without
CONSULT-II), AT-15.
SAT341H
YAT351
TROUBLE DIAGNOSIS FOR OVERRUN CLUTCH S/V
AT-69
DIAGNOSTIC PROCEDURE
CHECK GROUND CIRCUIT.
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord assembly
connector in engine compartment.
3. Check resistance between terminal
q
3
and ground.
Resistance: 20 - 40
Ω
OK
E
NG
1. Remove control valve
assembly. Refer to
AT-113.
2. Check the following items:
I
Overrun clutch solenoid
valve
Refer to “COMPONENT
INSPECTION” below.
I
Harness of terminal cord
assembly for short or open
CHECK POWER SOURCE CIRCUIT.
1. Turn ignition switch to “OFF” position.
2. Disconnect TCM harness connector.
3. Check resistance between terminal
q
3
and TCM harness connector terminal
q
20
.
Resistance:
Approximately 0
Ω
If OK, check harness for short to
ground and short to power.
4. Reinstall any part removed.
OK
E
NG
Repair open circuit or short
to ground or short to power
in harness or connector.
Perform “SELF-DIAGNOSIS CODE
CONFIRMATION PROCEDURE”, AT-69.
OK
E
NG
1. Perform TCM input/output
signal inspection.
2. If NG, recheck TCM pin
terminals for damage or
loose connection with har-
ness connector.
INSPECTION END
COMPONENT INSPECTION
Overrun clutch solenoid valve
I
For removal, refer to AT-113.
Resistance check
I
Check resistance between terminal
q
3
and ground.
Solenoid valve
Terminal No.
Resistance
(Approx.)
Overrun clutch
solenoid valve
q
3
Ground
20 - 40
Ω
Operation check
I
Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal
q
3
and ground.
YAT308
YAT309
YAT310
YAT311
H
H
H
TROUBLE DIAGNOSIS FOR OVERRUN CLUTCH S/V
Overrun Clutch Solenoid Valve (Cont’d)
AT-70
Wiring Diagram — AT — TCV
YAT277
TROUBLE DIAGNOSIS FOR T/C CLUTCH SOL/V
AT-71
Torque Converter Clutch Solenoid Valve
DESCRIPTION
The torque converter clutch solenoid valve is activated, with the
gear in D
4
, by the TCM in response to signals sent from the vehicle
speed and throttle (accelerator) position sensors. Torque converter
clutch piston operation will then be controlled.
Lock-up operation, however, is prohibited when A/T fluid tempera-
ture is too low.
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code
Malfunction is detected when ...
Check items
(Possible cause)
:
T/C CLUTCH SOL/V
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
T/C clutch solenoid valve
:
7th judgement flicker
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Remarks: Specification data are reference values.
Monitor item
Condition
Specification
Torque converter clutch solenoid valve
duty
Lock-up “OFF”
"
Lock-up “ON”
Approximately
4%
"
Approximately
94%
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE
After the repair, perform the following procedure to confirm the
malfunction is eliminated.
1)
Start engine.
2)
Select “SELF-DIAG RESULTS” mode with CONSULT-II.
3)
Drive vehicle in D
1
,
D
2
,
D
3
,
D
4
,
D
4
lock-up
position.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1)
Start engine.
2)
Drive vehicle in D
1
,
D
2
,
D
3
,
D
4
,
D
4
lock-up
position.
3)
Perform self-diagnosis.
Refer to SELF-DIAGNOSTIC PROCEDURE (Without
CONSULT-II), AT-15.
SAT342HA
SAT818H
TROUBLE DIAGNOSIS FOR T/C CLUTCH SOL/V
AT-72
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