Mitsubishi Eclipse. Manual — part 845

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-389

INSPECTION PROCEDURE USING AN OSCILLOSCOPE

M1231008500283

Waveform sample

TERMINAL
NO.

INSPECTION ITEM

INSPECTION REQUIREMENT

NORMAL
CONDITION
(WAVEFORM
SAMPLE)

45

Crankshaft position
sensor

Selector lever position:
N

Idling (Vehicle stopped)

Waveform A

103

Input shaft speed
sensor

Selector lever position:
3 <Vehicles without
sport mode>, Sport
mode <Vehicles with
sport mode>

Driving at constant speed of
50 km/h (31 mph) in 3rd gear
(2.4L Engine: 1,600

− 1,900

r/min, 3.0L Engine: 1,300

−

1,600 r/min)

Waveform B

104

Output shaft speed
sensor

80

Vehicle speed signal

Waveform C

129

Low-reverse solenoid
valve

• Ignition switch: ON

• Selector lever

position: 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

AC001872AE

WAVEFORM A

(V)

0

5

(ms)

AC001873AD

WAVEFORM B

(V)

0

5

(ms)

AC001872AF

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 TRANSAXLE

23A-390

A/T FAULTY OPERATION PREVENTION MECHANISM

DIAGNOSIS

INTRODUCTION TO A/T KEY INTERLOCK AND SHIFT LOCK MECHANISMS

M1232001600237

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 MECHANISMS DIAGNOSTIC
TROUBLESHOOTING STRATEGY

M1232001700234

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 transaxle key interlock and shift lock
mechanisms 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 malfunction is eliminated.

SYMPTOM CHART

M1232001800424

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-391

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-391

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-393

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

4

P.23A-393

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

5

P.23A-394

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

6

P.23A-395

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

7

P.23A-396

A/T FAULTY OPERATION PREVENTION MECHANISM DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-391

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: 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.

.

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-418

. 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-418

.

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-421

. 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 :

No action to be taken.

NO :

Replace the shift lock cable. Refer to

P.23A-421

. 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 any Position 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

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AUTOMATIC TRANSAXLE

23A-392

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 transaxle control cable.

Q: Is the connection of selector lever assembly and

shift transaxle control cable in good condition?
YES :

Go to Step 3.

NO :

Repair the connection of selector lever
assembly and shift transaxle 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-421

. 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-421

. 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-421

. 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-421

. 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 transaxle control
cable.

Q: Is the transaxle control cable installed correctly?

YES :

Go to Step 8.

NO :

Install the transaxle control cable correctly.
Refer to

P.23A-415

. 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 transaxle control cable.

Q: Is the transaxle control cable in good condition?

YES :

Repair or replace the selector lever

assembly. Refer to

P.23A-415

and

P.23A-418

. 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 transaxle control cable. Refer
to

P.23A-415

. 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.