Mitsubishi Montero Sport (2004+). Manual — part 713

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-417

INSPECTION PROCEDURE USING AN OSCILLOSCOPE

M1231109500119

Waveform sample

TERMINAL
NO.

INSPECTION ITEM

INSPECTION REQUIREMENT

NORMAL CONDITION
(WAVEFORM SAMPLE)

45

Crankshaft position
sensor

Transmission
range: N

Idling (Vehicle
stopped)

Waveform A

103

Input shaft speed sensor Transmission

range: 3

Driving at constant
speed of 50 km/h
(31 mph) in 3rd
gear (Engine: 1,500
− 2,000 r/min)

Waveform B

104

Output shaft speed
sensor

80

Vehicle speed sensor

Waveform C

129

Low-reverse solenoid
valve

• Ignition

switch: ON

• Transmission

range: P

• Engine:

Stopped

• Throttle

(Accelerator)
opening
angle: Less
than 1 Volt

Force drive each
solenoid valve
(Actuator test)

Waveform D

120

Underdrive solenoid
valve

106

Second solenoid valve

130

Overdrive solenoid valve

107

Torque converter clutch
control solenoid valve

AC001872AE

WAVEFORM A

(V)

0

5

(ms)

AC001873AD

WAVEFORM B

(V)

0

5

(ms)

AC001873AE

WAVEFORM C

(V)

0

12

(ms)

AC001875AD

WAVEFORM D

(V)

0

20

(ms)

40

60

A/T FAULTY OPERATION PREVENTION MECHANISM DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-418

A/T FAULTY OPERATION PREVENTION MECHANISM

DIAGNOSIS

INTRODUCTION TO A/T KEY INTERLOCK AND SHIFT LOCK MECHANISMS

M1232001600282

If the key interlock and shift lock mechanisms indi-
cates a malfunction, the key interlock cable, the shift
lock cable, or the selector lever assembly may be
defective. In this case, follow troubleshooting below.

A/T KEY INTERLOCK AND SHIFT LOCK MECHANISM DIAGNOSTIC
TROUBLESHOOTING STRATEGY

M1232001700289

Use these steps to plan your diagnostic strategy. If
your follow then carefully, you will be sure that you
have exhausted most of the possible ways to find
automatic transmission key interlock and shift lock
mechanism fault.
1. Gather information from the customer.

2. Verify that the condition described by the

customer exists.

3. Find the malfunction by following the Symptom

Chart.

4. Verify that the malfunction is eliminated.

SYMPTOM CHART <A/T FAULTY OPERATION PREVENTION MACHANISM>

M1232001800480

SYMPTOM

INSPECTION
PROCEDURE

REFERENCE
PAGE

Selector lever can be moved from "P" to "R" position without depressing
brake pedal when ignition key is at any position other than "LOCK"
(OFF) position.

1

P.23A-419

Selector lever cannot be moved from "P" to "R" position with brake
pedal depressed when ignition key is at any position other than "LOCK"
(OFF) position.

2

P.23A-419

Selector lever can be moved from "P" to "R" position with brake pedal
depressed when ignition key is at "LOCK" (OFF) position.

3

P.23A-421

Selector lever cannot be moved from "P" to "R" position smoothly.

4

P.23A-421

Selector lever cannot be moved from "P" to "R" position.

5

P.23A-423

Ignition key cannot be turned to "LOCK" (OFF) position when selector
lever is at "P" position.

6

P.23A-423

Ignition key can be turned to "LOCK" (OFF) position when selector lever
is at any position other than "P" position.

7

P.23A-424

A/T FAULTY OPERATION PREVENTION MECHANISM DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-419

SYMPTOM PROCEDURES <KEY INTERLOCK AND SHIFT LOCK MECHANISMS>

INSPECTION PROCEDURE 1: Selector Lever can be Moved from "P" to "R" Position without
Depressing Brake Pedal when Ignition Key is at Positions other than "LOCK" (OFF) Position.

.

TECHNICAL DESCRIPTION (COMMENT)
Lock cam or shift lock cable may be defective.

.

TROUBLESHOOTING HINTS

• Malfunction of lock cam

• Malfunction of shift lock cable

DIAGNOSIS

STEP 1. Check the fit of the lock cam.

Q: Is the lock cam installed correctly?

YES :

Go to Step 2.

NO :

Install the lock cam correctly. Refer to

P.23A-449

. When the brake pedal is

released with the ignition key at other
positions than "LOCK" (OFF) position,
check that the selector lever can not be
moved from "P" position to "R" position.

STEP 2. Check the lock cam.

Q: Is the lock cam in good condition?

YES :

Go to Step 3.

NO :

Replace the lock cam. Refer to

P.23A-449

.

When the brake pedal is released with the
ignition key at other positions than "LOCK"
(OFF) position, check that the selector lever
can not be moved from "P" position to "R"
position.

STEP 3. Check the fit of the shift lock cable.

Q: Is the shift lock cable installed correctly?

YES :

Go to Step 4.

NO :

Install the shift lock cable correctly. Refer to

P.23A-451

. When the brake pedal is

released with the ignition key at other
positions than "LOCK" (OFF) position,
check that the selector lever can not be
moved from "P" position to "R" position.

STEP 4. Check the shift lock cable.

Q: Is the shift lock cable in good condition?

YES :

There is no action to be taken.

NO :

Replace the shift lock cable. Refer to

P.23A-451

. When the brake pedal is

released with the ignition key at other
positions than "LOCK" (OFF) position,
check that the selector lever can not be
moved from "P" position to "R" position.

INSPECTION PROCEDURE 2: Selector Lever cannot be Moved from "P" to "R" Position with Brake
Pedal Depressed when Ignition Key is at Positions other than "LOCK" (OFF) Position.

.

TECHNICAL DESCRIPTION (COMMENT)
Selector lever assembly, shift lock cable, key inter-
lock cable, transmission control cable, or lock cam
may be defective.

.

TROUBLESHOOTING HINTS

• Malfunction of selector lever assembly

• Malfunction of shift lock cable

• Malfunction of key interlock cable

• Malfunction of transmission control cable

• Malfunction of lock cam

A/T FAULTY OPERATION PREVENTION MECHANISM DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-420

DIAGNOSIS

STEP 1. Check the connection of lock cam and
key interlock cable.

Q: Is the connection of lock cam and key interlock

cable in good condition?

YES :

Go to Step 2.

NO :

Repair the connection of lock cam and shift
lock cable. When the brake pedal is
depressed with the ignition key at other
positions than "LOCK" (OFF) position,
check that the selector lever can be moved
from "P" position to "R" position.

STEP 2. Check the connection of selector lever
assembly and shift transmission control cable.

Q: Is the connection of selector lever assembly and

shift transmission control cable in good condition?

YES :

Go to Step 3.

NO :

Repair the connection of selector lever
assembly and shift transmission control
cable. When the brake pedal is depressed
with the ignition key at other positions than
"LOCK" (OFF) position, check that the
selector lever can be moved from "P"
position to "R" position.

STEP 3. Check the fit of the shift lock cable.

Q: Is the shift lock cable installed correctly?

YES :

Go to Step 4.

NO :

Install the shift lock cable correctly. Refer to

P.23A-451

. When the brake pedal is

depressed with the ignition key at other
positions than "LOCK" (OFF) position,
check that the selector lever can be moved
from "P" position to "R" position.

STEP 4. Check the shift lock cable.

Q: Is the shift lock cable in good condition?

YES :

Go to Step 5.

NO :

Replace the shift lock cable. Refer to

P.23A-451

. When the brake pedal is

depressed with the ignition key at other
positions than "LOCK" (OFF) position,
check that the selector lever can be moved
from "P" position to "R" position.

STEP 5. Check the fit of the key interlock cable.

Q: Is the key interlock cable installed correctly?

YES :

Go to Step 6.

NO :

Install the key interlock cable correctly.
Refer to

P.23A-451

. When the brake pedal

is depressed with the ignition key at other
positions than "LOCK" (OFF) position,
check that the selector lever can be moved
from "P" position to "R" position.

STEP 6. Check the key interlock cable.

Q: Is the key interlock cable in good condition?

YES :

Go to Step 7.

NO :

Replace the key interlock cable. Refer to

P.23A-451

. When the brake pedal is

depressed with the ignition key at other
positions than "LOCK" (OFF) position,
check that the selector lever can be moved
from "P" position to "R" position.

STEP 7. Check the fit of the transmission control
cable.

Q: Is the transmission control cable installed

correctly?

YES :

Go to Step 8.

NO :

Install the transmission control cable
correctly. Refer to

P.23A-445

. When the

brake pedal is depressed with the ignition
key at other positions than "LOCK" (OFF)
position, check that the selector lever can
be moved from "P" position to "R" position.

STEP 8. Check the transmission control cable.

Q: Is the transmission control cable in good

condition?

YES :

Repair or replace the selector lever

assembly. Refer to

P.23A-445

and

P.23A-449

. When the brake pedal is

depressed with the ignition key at other
positions than "LOCK" (OFF) position,
check that the selector lever can be moved
from "P" position to "R" position.

NO :

Replace the transmission control cable.
Refer to

P.23A-445

. When the brake pedal

is depressed with the ignition key at other
positions than "LOCK" (OFF) position,
check that the selector lever can be moved
from "P" position to "R" position.