Mitsubishi Galant. Manual — part 450

A/T FAULTY OPERATION PREVENTION MECHANISM DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-267

A/T FA U LTY O PER ATIO N PREVEN TIO N M EC HA N ISM

DIA G NO SIS

INTRODUCTION TO A/T KEY INTERLOCK AND SHIFT LOCK MECHANISMS

M1232001600055

If the key interlock and shift lock mechanisms indicates 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 TROUBLE
SHOOTING STRATEGY

M1232001700041

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 follows the Symptom

Chart.

4. Verify malfunction is eliminated.

SYMPTOM CHART

M1232001800101

SYMPTOM PROCEDURES

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

TECHNICAL DESCRIPTION (COMMENT)

•

Lock cam or shift lock cable may be defective.

TROUBLESHOOTING HINTS

•

Malfunction of lock cam

•

Malfunction of shift lock cable

DIAGNOSIS

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

SYMPTOM

INSPECTION
PROCEDURE

REFERENCE
PAGE

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

1

P.23A-267

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

2

P.23A-268

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

3

P.23A-268

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

4

P.23A-268

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

5

P.23A-268

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

6

P.23A-269

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

7

P.23A-269

-

A/T FAULTY OPERATION PREVENTION MECHANISM DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-268

INSPECTION PROCEDURE 2: Selector Lever cannot be Moved from "P" to "R"

with Brake Pedal

Depressed when Ignition Key is at Positions Other than "LOCK" (OFF).

TECHNICAL DESCRIPTION (COMMENT)

•

Selector lever assembly, shift lock cable, key
interlock 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

DIAGNOSIS

Check items described in the column
"Troubleshooting Hints." When the brake pedal is
depressed with the ignition key at other positions
than "LOCK" (OFF), check that the selector lever can
be moved from "P" position to "R" position.

INSPECTION PROCEDURE 3: Selector Lever can be Moved from "P" to "R" with Brake Pedal
Depressed when Ignition Key is at "LOCK" (OFF) Position.

TECHNICAL DESCRIPTION (COMMENT)

•

Key interlock cable or lock cam may be defective.

TROUBLESHOOTING HINTS

•

Malfunction of lock cam

•

Malfunction of shift lock cable

DIAGNOSIS

Check items described in the column
"Troubleshooting Hints." When the brake pedal is
depressed with the ignition key at the "LOCK" (OFF),
check that the selector lever can not be moved from
"P" position to "R" position.

INSPECTION PROCEDURE 4: Selector Lever cannot be Moved from "P" to "R" Smoothly.

TECHNICAL DESCRIPTION (COMMENT)

•

Key interlock cable, shift lock cable, lock cam or
selector lever assembly may be defective.

TROUBLESHOOTING HINTS

•

Malfunction of key interlock cable

•

Malfunction of shift lock cable

•

Malfunction of lock cam

•

Malfunction of selector lever assembly

DIAGNOSIS

Check items described in the column
"Troubleshooting Hints." Check that the selector
lever can be moved from "P" position to "R" position
smoothly.

INSPECTION PRICEDURE 5: Selector Lever cannot be Moved from "R" to "P".

TECHNICAL DESCRIPTION (COMMENT)

•

Selector lever assembly or transmission control
cable may be defective.

TROUBLESHOOTING HINTS

•

Malfunction of selector lever assembly

•

Malfunction of transmission control cable

A/T FAULTY OPERATION PREVENTION MECHANISM DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-269

DIAGNOSIS

Check items described in the column
"Troubleshooting Hints." Check that the selector
lever can be moved from "R" position to "P" position.

INSPECTION PROCEDURE 6: Ignition Key cannot be Turned to "LOCK" (OFF) Position when Selector
Lever is at "P" Position.

TECHNICAL DESCRIPTION (COMMENT)

•

Lock cam, key cylinder cover or key interlock
cable may be defective.

TROUBLESHOOTING HINTS

•

Malfunction of lock cam

•

Malfunction of key interlock cable

•

Malfunction of key cylinder slider

DIAGNOSIS

Check items described in the column
"Troubleshooting Hints." Check that the ignition key
can not be turned to the "LOCK" (OFF) position with
the selector lever at "P" position.

INSPECTION PROCEDURE 7: Ignition Key can be Turned to "LOCK" (OFF) Position when Selector
Lever is at Positions Other than "P."

TECHNICAL DESCRIPTION (COMMENT)

•

Lock cam, key cylinder cover or key interlock
cable may be defective.

TROUBLESHOOTING HINTS

•

Malfunction of lock cam

•

Malfunction of key cylinder cover

•

Malfunction of key interlock cable

DIAGNOSIS

Check items described in the column
"Troubleshooting Hints." Check that the ignition key
can not be turned to the "LOCK" (OFF) position with
the selector lever at any position other than "P."

SPECIAL TOOLS

TSB Revision

AUTOMATIC TRANSAXLE

23A-270

SPECIA L TO O LS

M1231000600048

TOOL

TOOL NUMBER AND
NAME

SUPERSES-
SION

APPLICATION

MD998330 (Includes
MD998331) Oil pressure
gauge (2,942 kPa, 427
psi)

MD998330-01

Measurement of hydraulic pressure

MD998332 Adapter

MD998332-01

Connection for oil pressure gauge

MD998478 Test harness
(3 pin, triangle)

MD998478-01

Inspection using an oscilloscope

MB991502 Scan tool
(MUT-II)

MB991496-OD

Checking diagnostic trouble codes

MB991709 Test harness
set

Tool not avail-
able

Inspection using an oscilloscope

MD998900 Adapter

MD998900-01

Connection for oil pressure gauge

MB995062 Flushing tool

−

Flushing cooler and tube

MD998330

MD998332

B991502

MD998900