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Nissan Terrano r20e. Manual - part 6

Item

Display

Monitor item

Description

Remarks

ECU
input

signals

Main

signals

ASCD-OD cut signal

ASCD

⋅

OD CUT

[ON/OFF]

—

Status of ASCD

⋅

OD release signal is

displayed.
ON ... OD released
OFF ... OD not released

This is displayed even when no
ASCD is mounted.

Kickdown switch

KICKDOWN SW
[ON/OFF]

—

ON/OFF status, computed from sig-
nal of kickdown SW, is displayed.

This is displayed even when no
kickdown switch is equipped.

A/T mode switch

POWER SHIFT SW
[ON/OFF]

—

ON/OFF state computed from signal
of SPORT shift SW is displayed.

Closed throttle position
switch

CLOSED THL/SW
[ON/OFF]

—

ON/OFF status, computed from sig-
nal of closed throttle (accelerator)
position SW, is displayed.

Wide open throttle posi-
tion switch

W/O THRL/P-SW
[ON/OFF]

—

ON/OFF status, computed from sig-
nal of wide open throttle (accelera-
tor) position SW, is displayed.

A/T mode switch

HOLD SW
[ON/OFF]

—

ON/OFF status, computed from sig-
nal of SNOW shift SW, is displayed.

Gear position

GEAR

—

Gear position data used for compu-
tation by TCM, is displayed.

Selector lever position

SLCT LVR POSI

—

Selector lever position data, used
for computation by TCM, is dis-
played.

A specific value used for control is
displayed if fail-safe is activated due
to error.

Vehicle speed

VEHICLE SPEED
[km/h] or [mph]

—

Vehicle speed data, used for com-
putation by TCM, is displayed.

Throttle (accelerator)
position

THROTTLE POSI
[/8]

—

Throttle (accelerator) position data,
used for computation by TCM, is
displayed.

A specific value used for control is
displayed if fail-safe is activated due
to error.

Line pressure duty

LINE PRES DTY
[%]

—

Control value of line pressure sole-
noid valve, computed by TCM from
each input signal, is displayed.

Torque converter clutch
solenoid valve duty

TCC S/V DUTY
[%]

—

Control value of torque converter
clutch solenoid valve, computed by
TCM from each input signal, is dis-
played.

Shift solenoid valve A

SHIFT S/V A
[ON/OFF]

—

Control value of shift solenoid valve
A, computed by TCM from each
input signal, is displayed.

Control value of solenoid is displayed
even if solenoid circuit is discon-
nected.
The “OFF” signal is displayed if sole-
noid circuit is shorted.

Shift solenoid valve B

SHIFT S/V B
[ON/OFF]

—

Control value of shift solenoid valve
B, computed by TCM from each
input signal, is displayed.

Overrun clutch solenoid
valve

OVERRUN/C S/V
[ON/OFF]

—

Control value of overrun clutch sole-
noid valve computed by TCM from
each input signal is displayed.

Self-diagnosis display
lamp
(SPORT indicator lamp)

SELF-D DP LMP
[ON/OFF]

—

Control status of SPORT indicator
lamp is displayed.

X: Applicable
—: Not applicable

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Diagnosis by CONSULT-II (Cont’d)

AT-21

Introduction

The TCM receives a signal from the vehicle-speed sensor, throttle
(accelerator) position sensor or park/neutral position switch and
provides shift control or lock-up control via solenoid valves.
Input and output signals must always be correct and stable in the
operation of the A/T system. The A/T system must be in good
operating condition and be free of valve seizure, solenoid valve
malfunction, etc.
It is much more difficult to diagnose a problem that occurs intermit-
tently rather than continuously. Most intermittent problems are
caused by poor electric connections or improper wiring. In this
case, careful checking of suspected circuits may help prevent the
replacement of good parts.
A visual check only may not find the cause of the problems. A road
test with CONSULT-II or a circuit tester connected should be per-
formed. Follow the “Work Flow”. Refer to AT-26.
Before undertaking actual checks, take a few minutes to talk with
a customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such problems, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A “Diagnostic Worksheet” like the
example (AT-24) should be used.
Start your diagnosis by looking for “conventional” problems first.
This will help troubleshoot driveability problems on an electronically
controlled engine vehicle.

SAT631IA

SAT632I

SEF234G

TROUBLE DIAGNOSIS — Introduction

AT-22

Diagnostic Worksheet

INFORMATION FROM CUSTOMER

KEY POINTS
WHAT ......................... Vehicle & A/T model
WHEN ......................... Date, Frequencies
WHERE ...................... Road conditions
HOW ........................... Operating conditions, Symptoms

Customer name

MR/MS

Model & Year

VIN

Trans. model

Engine

Mileage

Incident Date

Manuf. Date

In Service Date

Frequency

Continuous

Intermittent

(

times a day)

Symptoms

Vehicle does not move.

(

Any position

Particular position)

No up-shift

(

1st

2nd

3rd

O/D)

No down-shift

(

O/D

3rd

2nd

1st)

Lockup malfunction

Shift point too high or too low.

Shift shock or slip

(

Lockup

Any drive position)

Noise or vibration

No kickdown

No pattern select

Others

(

)

SPORT indicator lamp

Blinks for about 8 seconds.

Continuously lit

Not lit

Malfunction indicator lamp
(MIL)

Continuously lit

Not lit

TROUBLE DIAGNOSIS — Introduction

AT-23

DIAGNOSTIC WORKSHEET

Read the Fail-safe and listen to customer complaints.

AT-5

A/T FLUID CHECK

AT-27

Leakage (Follow specified procedure)

Fluid condition

Fluid level

Perform STALL TEST and LINE PRESSURE TEST.

AT-27,

AT-30

Stall test — Mark possible damaged components/others.

Torque converter one-way clutch

Reverse clutch

Forward clutch

Overrun clutch

Forward one-way clutch

Low & reverse brake

Low one-way clutch

Engine

Line pressure is low

Clutches and brakes except high
clutch and brake band are OK

Line pressure test — Suspected parts:

Perform all ROAD TEST and mark required procedures.

AT-32

4-1. Check before engine is started.

AT-33

SELF-DIAGNOSTIC PROCEDURE — Mark detected items.

Vehicle speed sensor

⋅

A/T (Revolution sensor), AT-50.

Vehicle speed sensor

⋅

MTR, AT-54.

Throttle (accelerator) position sensor, AT-60.

Shift solenoid valve A, AT-63.

Shift solenoid valve B, AT-66.

Overrun clutch solenoid valve, AT-69.

Torque converter clutch solenoid valve, AT-88.

A/T fluid temperature sensor and TCM power source, AT-76.

Engine speed signal, AT-80.

Line pressure solenoid valve, AT-84.

Park/neutral position, overdrive control, A/T check and throttle

(accelerator) position switches, AT-88.

Battery

Others

4-2. Check at idle

AT-35

1. SPORT Indicator Lamp Does Not Come On, AT-92.

2. SPORT or SNOW Indicator Lamp Does Not Come On, AT-95.

3. O/D OFF Indicator Lamp Does Not Come On, AT-95.

4. SPORT Indicator Lamp Does Not Come On, AT-96.

5. Engine Cannot Be Started In “P” And “N” Position, AT-97.

6. In “P” Position, Vehicle Moves Forward Or Backward When Pushed, AT-97.

7. In “N” Position, Vehicle Moves, AT-98.

8. Large Shock. “N”

“R” Position, AT-99.

9. Vehicle Does Not Creep Backward In “R” Position, AT-100.

10. Vehicle Does Not Creep Forward In “D”, “2” Or “1” Position, AT-101.

4-3. Cruise test

AT-36,

AT-39

Part-1

11. Vehicle Cannot Be Started From D

, AT-102.

12. A/T Does Not Shift: D

Or Does Not Kickdown: D

, AT-103.

13. A/T Does Not Shift: D

, AT-104.

14. A/T Does Not Shift: D

, AT-105.

15. A/T Does Not Perform Lock-up, AT-106.

16. A/T Does Not Hold Lock-up Condition, AT-107.

17. Lock-up Is Not Released, AT-107.

18. Engine Speed Does Not Return To Idle (Light Braking D

), AT-108.

TROUBLE DIAGNOSIS — Introduction

Diagnostic Worksheet (Cont’d)

AT-24

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