Nissan Terrano r20e. Manual - part 21

 

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Nissan Terrano r20e. Manual - part 21

 

 

DIAGNOSTIC PROCEDURE

Perform diagnostic test mode II (self-
diagnostic results) for engine control.
Check ignition signal circuit condition.

OK

E

NG

Check ignition signal circuit
for engine control. Refer to
EC section [TROUBLE
DIAGNOSIS FOR “IGN
SIGNAL-PRIMARY” (DTC
21)].

CHECK INPUT SIGNAL.

1. Start engine.

2. Select “ECU INPUT SIGNALS” in

Data Monitor.

3. Read out the value of “ENGINE

SPEED”.
Check engine speed changes
according to throttle position.

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

1. Start engine.

2. Check voltage between TCM ter-

minal

q

39

and ground.

Voltage (Idle speed):

Approximately 0.8V

Voltage (2,000 rpm):

Approximately 2.2V

OK

E

NG

Check the following items:

I

Harness for short or
open between TCM and
ECM

I

Resistor

Refer to EC section
[TROUBLE DIAGNOSIS
FOR “IGN SIGNAL-PRI-
MARY” (DTC 21)].

Perform “SELF-DIAGNOSIS CODE CON-
FIRMATION PROCEDURE”, AT-80.

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

YAT320

H

H

H

TROUBLE DIAGNOSIS FOR ENGINE SPEED SIG

Engine Speed Signal (Cont’d)

AT-81

Wiring Diagram — AT — LPSV

LHD MODELS

YAT278

TROUBLE DIAGNOSIS FOR LINE PRESSURE S/V

AT-82

RHD MODELS

YAT279

TROUBLE DIAGNOSIS FOR LINE PRESSURE S/V

Wiring Diagram — AT — LPSV (Cont’d)

AT-83

Line Pressure Solenoid Valve

DESCRIPTION

The line pressure solenoid valve regulates the oil pump discharge
pressure to suit the driving condition in response to a signal sent
from the TCM.

ON BOARD DIAGNOSIS LOGIC

Diagnostic trouble code

Malfunction is detected when ...

Check items

(Possible cause)

:

LINE PRESSURE 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

Line pressure solenoid valve

:

10th judgement flicker

CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE

Remarks: Specification data are reference values.

Monitor item

Condition

Specification

Line pressure solenoid valve duty

Low line-pressure

(Small throttle opening)

"

High line-pressure

(Large throttle opening)

Approximately

29%

"

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)

With brake pedal depressed, shift the lever from “P”

,

“N”

,

“D”

,

“N”

,

“P” positions.

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

1)

Start engine.

2)

With brake pedal depressed, shift the lever from “P”

,

“N”

,

“D”

,

“N”

,

“P” positions.

3)

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

SAT341H

SAT824H

TROUBLE DIAGNOSIS FOR LINE PRESSURE S/V

AT-84

 

 

 

 

 

 

 

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