Nissan Terrano r20e. Instruction — 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
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст