Nissan Terrano r20e. Manual - part 19

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

6

and ground.
Resistance: 10 - 20

Ω

OK

E

NG

1. Remove oil pan. Refer

to AT-123.

2. Check the following

items:

I

Torque converter clutch
solenoid valve
Refer to “COMPONENT
INSPECTION” on next
page.

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

6

and TCM harness connector terminal

q

3

.

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 con-
nector.

Perform “SELF-DIAGNOSIS CODE CON-
FIRMATION PROCEDURE”, AT-72.

OK

E

NG

1. Perform TCM input/

output signal inspection.

2. If NG, recheck TCM pin

terminals for damage or
loose connection with
harness connector.

INSPECTION END

YAT312

YAT313

H

H

H

TROUBLE DIAGNOSIS FOR T/C CLUTCH SOL/V

Torque Converter Clutch Solenoid Valve
(Cont’d)

AT-73

COMPONENT INSPECTION

Torque converter clutch solenoid valve

I

For removal, refer to AT-139.

Resistance check

I

Check resistance between terminal

q

6

and ground.

Solenoid valve

Terminal No.

Resistance

(Approx.)

Torque converter
clutch solenoid
valve

q

6

Ground

10 - 20

Ω

Operation check

I

Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal

q

6

and ground.

YAT314

YAT315

TROUBLE DIAGNOSIS FOR T/C CLUTCH SOL/V

Torque Converter Clutch Solenoid Valve
(Cont’d)

AT-74

Wiring Diagram — AT — BA/FTS

YAT283

TROUBLE DIAGNOSIS FOR BATT/FLUID TEMP SEN

AT-75

A/T Fluid Temperature Sensor and TCM Power
Source

DESCRIPTION

The A/T fluid temperature sensor detects the A/T fluid temperature
and sends a signal to the TCM.

ON BOARD DIAGNOSIS LOGIC

Diagnostic trouble code

Malfunction is detected when ...

Check items

(Possible cause)

:

BATT/FLUID TEMP SEN

TCM receives an excessively low or
high voltage from the sensor.

I

Harness or connectors
(The sensor circuit is open or
shorted.)

I

A/T fluid temperature sensor

:

8th judgement flicker

CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE

Remarks: Specification data are reference values.

Monitor item

Condition

Specification

A/T fluid temperature sensor

Cold [20°C (68°F)]

"

Hot [80°C (176°F)]

Approximately

1.5V

"

Approximately

0.5V

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, vehicle speed higher than
10 km/h (6 MPH), throttle opening greater than 1/8 of the
full open position, engine speed higher than 450 rpm
and driving for more than 10 minutes.

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

1)

Start engine.

2)

Drive vehicle under the following conditions:
Selector lever in “D” position, vehicle speed higher than
10 km/h (6 MPH), throttle opening greater than 1/8 of the
full open position, engine speed higher than 450 rpm
and driving for more than 10 minutes.

3)

Perform self-diagnosis.
Refer to SELF-DIAGNOSTIC PROCEDURE (Without
CONSULT-II), AT-15.

SAT342HA

SAT821H

TROUBLE DIAGNOSIS FOR BATT/FLUID TEMP SEN

AT-76