Nissan Terrano r20e. Manual — part 16
DIAGNOSTIC PROCEDURE
Perform diagnostic test mode II (self-
diagnostic results) for engine control.
Refer to EC section [“Malfunction Indicator
Lamp (MIL)”, “ON BOARD DIAGNOSTIC
SYSTEM DESCRIPTION”].
OK
E
NG
Check throttle (accelerator)
position sensor circuit for
engine control. Refer to
EC section [“TROUBLE
DIAGNOSIS FOR “THRTL
(ACCEL) POSI SEN”].
CHECK INPUT SIGNAL.
1. Turn ignition switch to “ON” posi-
tion.
(Do not start engine.)
2. Select “ECU INPUT SIGNALS” in
Data Monitor.
3. Read out the value of “THRTL
POS SEN”.
Voltage:
Fully-closed throttle:
Approximately 0.5V
Fully-open throttle:
Approximately 4V
----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------
1. Turn ignition switch to “ON” posi-
tion. (Do not start engine.)
2. Check voltage between TCM ter-
minals
q
32
and
q
42
while accelerator
pedal is depressed slowly.
Voltage:
Fully-closed throttle valve:
Approximately 0.4V
Fully-open throttle valve:
Approximately 4V
(Voltage rises gradually in
response to throttle position)
OK
E
NG
Check harness for short or
open between ECM and
TCM regarding throttle
(accelerator) position sen-
sor circuit. (Main harness)
CHECK THROTTLE (ACCELERATOR)
POSITION SWITCH.
Refer to “CHECK THROTTLE (ACCEL-
ERATOR) POSITION SWITCH”, AT-88.
OK
E
NG
Repair or replace dam-
aged parts.
Perform “SELF-DIAGNOSIS CODE CON-
FIRMATION PROCEDURE”, AT-60.
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
YAT299
H
H
H
H
TROUBLE DIAGNOSIS FOR THROTTLE POSI SEN
Throttle (Accelerator) Position Sensor (Cont’d)
AT-61
Wiring Diagram — AT — SSV/A
YAT280
TROUBLE DIAGNOSIS FOR SHIFT SOLENOID/V A
AT-62
Shift Solenoid Valve A
DESCRIPTION
Shift solenoid valves A and B are turned “ON” or “OFF” by the TCM
in response to signals sent from the park/neutral position switch,
vehicle speed and throttle position sensors. Gears will then be
shifted to the optimum position.
Gear position
1
2
3
4
Shift solenoid valve A
ON
OFF
OFF
ON
Shift solenoid valve B
ON
ON
OFF
OFF
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code
Malfunction is detected when ...
Check items
(Possible cause)
:
SHIFT SOLENOID/V A
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
Shift solenoid valve A
:
4th 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 in D
1
,
D
2
position.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1)
Start engine.
2)
Drive vehicle in D
1
,
D
2
position.
3)
Perform self-diagnosis.
Refer to SELF-DIAGNOSTIC PROCEDURE (Without
CONSULT-II), AT-15.
SAT341H
YAT343
TROUBLE DIAGNOSIS FOR SHIFT SOLENOID/V A
AT-63
DIAGNOSTIC PROCEDURE
CHECK GROUND CIRCUIT.
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord assembly con-
nector in engine compartment.
3. Check resistance between terminal
q
2
and ground.
Resistance: 20 - 40
Ω
OK
E
NG
1. Remove control valve
assembly. Refer to
AT-113.
2. Check the following
items:
I
Shift solenoid valve A
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
2
and TCM harness connector terminal
q
11
.
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 CON-
FIRMATION PROCEDURE”, AT-63.
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
COMPONENT INSPECTION
Shift solenoid valve A
I
For removal, refer to AT-139.
Resistance check
I
Check resistance between terminal
q
2
and ground.
Solenoid valve
Terminal No.
Resistance
(Approx.)
Shift solenoid
valve A
q
2
Ground
20 - 40
Ω
Operation check
I
Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal
q
2
and ground.
YAT300
YAT301
YAT302
YAT303
H
H
H
TROUBLE DIAGNOSIS FOR SHIFT SOLENOID/V A
Shift Solenoid Valve A (Cont’d)
AT-64
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