Nissan Silvia. Instruction — part 33

4

CHECK TCM GROUND CIRCUIT

1. Turn ignition switch to OFF position.
2. Disconnect TCM harness connector.
3. Check continuity between TCM terminal Nos. 25, 48 and ground. Refer to “Wiring Diagram — AT — BA/FTS”, AT-127.

Continuity should exist.

If OK, check harness for short to ground and short to power.

OK or NG

OK

©

GO TO 5.

NG

©

Repair open circuit or short to ground or short to power in harness or connectors.

5

CHECK A/T FLUID TEMPERATURE SENSOR WITH TERMINAL CORD ASSEMBLY

1. Turn ignition switch to “OFF” position.
2. Disconnect solenoid valve harness connector (terminal cord assembly) E25 in engine compartment.
3. Check resistance between solenoid valve harness connector (terminal cord assembly) E25 terminals No. 6 (W) and No.

7 (B) when A/T is cold [20°C (68°F)].

SAT734JA

Is resistance approx. 2.5 k

Ω

?

Yes

©

GO TO 6.

No

©

1. Remove oil pan.
2. Check the following items:

I

A/T fluid temperature sensor
Refer to “Component Inspection”, AT-131.

I

Harness of terminal cord assembly for short or open

GI

MA

EM

LC

EC

FE

CL

MT

PD

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

TROUBLE DIAGNOSIS FOR BATT/FLUID TEMP SEN

Diagnostic Procedure (Cont’d)

AT-129

6

CHECK INPUT SIGNAL OF A/T FLUID TEMPERATURE SENSOR

With CONSULT-II

1. Start engine.
2. Select “TCM INPUT SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Read out the value of “FLUID TEMP SE”.

Voltage:

Cold [20°C (68°F)]

→

Hot [80°C (176°F)]:

Approximately 1.5V

→

0.5V

SAT614J

Without CONSULT-II

1. Start engine.
2. Check voltage between TCM harness connector M26 terminal No. 47 (W/R) and ground while warming up A/T.

Voltage:

Cold [20°C (68°F)]

→

Hot [80°C (176°F)]:

Approximately 1.5V

→

0.5V

SAT518JA

OK or NG

OK

©

GO TO 7.

NG

©

Check the following item:

I

Harness for short or open between TCM and terminal cord assembly (Main harness)

7

CHECK DTC

Perform Diagnostic Trouble Code (DTC) confirmation Procedure, AT-126.

OK or NG

OK

©

INSPECTION END

NG

©

I

Perform TCM input/output signal inspection.

I

If NG, recheck TCM pin terminals for damage or loose connection with harness con-
nector.

TROUBLE DIAGNOSIS FOR BATT/FLUID TEMP SEN

Diagnostic Procedure (Cont’d)

AT-130

SAT448K

Component Inspection

NMAT0243

A/T FLUID TEMPERATURE SENSOR

NMAT0243S01

I

For removal, refer to AT-205.

I

Check resistance.

Terminals

Connector

Terminal No. (Wire color)

Temperature

°C (°F)

Resistance

(Approx.) k

Ω

E25

6 (W)

7 (B)

20 (68)

2.5

80 (176)

0.3

GI

MA

EM

LC

EC

FE

CL

MT

PD

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

TROUBLE DIAGNOSIS FOR BATT/FLUID TEMP SEN

Component Inspection

AT-131

Description

NMAT0244

The engine speed signal is sent from the ECM to the TCM.

TCM TERMINALS AND REFERENCE VALUE

NMAT0244S01

Remarks: Specification data are reference values.

Terminal

No.

Wire color

Item

Condition

Judgement

standard

(Approx.)

39

L/OR

Engine speed
signal

Refer to EC-76, “ECM Inspection Table”.

ON BOARD DIAGNOSIS LOGIC

NMAT0244S02

Diagnostic trouble code

Malfunction is detected when ...

Check item (Possible cause)

: ENGINE SPEED SIG

TCM does not receive the proper voltage
signal from ECM.

I

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

: 9th judgement flicker

SAT014K

SAT823H

SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE

NMAT0244S04

After the repair, perform the following procedure to confirm the
malfunction is eliminated.

WITH CONSULT-II

NMAT0244S05

1)

Start engine.

2)

Select “SELF-DIAG RESULTS” mode for “A/T” with CON-
SULT-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
throttle position and driving for more than 10 seconds.

WITHOUT CONSULT-II

NMAT0244S06

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
throttle position and driving for more than 10 seconds.

3)

Perform self-diagnosis.
Refer

to

SELF-DIAGNOSTIC

PROCEDURE

(Without

CONSULT-II), AT-37.

TROUBLE DIAGNOSIS FOR ENGINE SPEED SIG

Description

AT-132