Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 502

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-300

CIRCUIT OPERATION
If the select switch of the shift switch assembly is set
to the sport mode, battery positive voltage will be
applied to the PCM (terminal number 109). If the shift
switch of the shift switch assembly is set to "UP" or
"DOWN" position, battery positive voltage will be
applied to the PCM (terminal number 122, 110).

COMMENT
The cause is probably a malfunction of the Park/
Neutral position switch circuit, shift switch assembly
circuit or a defective PCM.

TROUBLESHOOTING HINTS (The most likely

causes for this case:)

•

Malfunction of the Park/Neutral position switch

•

Malfunction of the shift switch assembly select
switch

AC001844

CONNECTOR: B-41

DIPSTICK

AB

AC001729 AN

CONNECTOR: C-41

AC001657

CONNECTOR: C-61 <2.4L ENGINE> OR
C-63 <3.0L ENGINE>

PCM

AN

AC001691

CONNECTORS: C-101, C-107

C-101

JUNCTION BLOCK
(FRONT VIEW)

C-107

AN

AC001741

CONNECTOR: C-27

AK

AC001741

CONNECTOR: C-28

AM

AC001741

CONNECTOR: C-65

AP

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-301

•

Malfunction of the shift switch assembly shift
switch (Up)

•

Malfunction of the shift switch assembly shift
switch (Down)

•

Damaged harness, connector

•

Malfunction of the PCM

DIAGNOSIS

Required Special Tool:
MB991502: Scan Tool (MUT-II)

STEP 1. Using scan tool MB991502, check data list item 67:
Select Switch, item 68: Shift Switch (Up), item 69: Shift
Switch (Down).

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to "ON" position.
(3) Set scan tool MB991502 to data reading mode for following

items.

a. item 67: Select Switch
b. item 68: Shift Switch (Up)

c. item 69: Shift Switch (Down)

•

The switches above are displayed, depending on the
selector lever condition as shown in the table.

(4) Turn the ignition switch to "LOCK" (OFF) position.

Q: Is the switch operating properly?

YES : This malfunction is intermittent. Refer to GROUP 00,

How to Use Troubleshooting/Inspection Service
Points

−

How to Cope with Intermittent Malfunction

P.00-6

.

NO : If completely NG: Go to Step 2. If item 68 and item 69

both are NG: Go to Step 4. If only item 67 is NG: Go
to Step 7. If only item 68 is NG: Go to Step 24. If only
item 69 is NG: Go to Step 28.

SELECTOR
LEVER
OPERATION

DATA LIST ITEM

67

68

69

D range

OFF

OFF

OFF

Sport mode

ON

OFF

OFF

Upshift and hold
the selector lever

ON

ON

OFF

Downshift and
hold the selector
lever

ON

OFF

ON

AC001252AE

16 PIN

MB991502

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-302

STEP 2. Check connectors C-65 at shift switch assembly
and C-61 <2.4L Engine> or C-63 <3.0L Engine> at PCM for
damage.
Q: Are the connectors in good condition?

YES : Go to Step 3.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

.

AC001741

CONNECTOR: C-65

AP

AC001657

CONNECTOR: C-61 <2.4L ENGINE> OR
C-63 <3.0L ENGINE>

PCM

AN

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-303

STEP 3. Using scan tool MB991502, check data list item 67:
Select Switch, item 68: Shift Switch (Up), item 69: Shift
Switch (Down).

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to "ON" position.
(3) Check the following items in the data list.

a. item 67: Select Switch
b. item 68: Shift Switch (Up)

c. item 69: Shift Switch (Down)

The switches above are displayed, depending on the

selector lever condition as shown in the table.

(4) Turn the ignition switch to "LOCK" (OFF) position.

Q: Is the switch operating properly?

YES : This malfunction is intermittent. Refer to GROUP 00,

How to Use Troubleshooting/Inspection Service
Points

−

How to Cope with Intermittent Malfunction

P.00-6

.

NO : Replace the PCM.

STEP 4. Check the shift switch assembly.
Refer to

P.23A-351

, Transaxle Control.

Q: Is the switch operating properly?

YES : Go to Step 5.
NO : Replace the shift switch assembly. Refer to

P.23A-

349

, Transaxle Control.

SELECTOR
LEVER
OPERATION

DATA LIST ITEM

67

68

69

D range

OFF

OFF

OFF

Sport mode

ON

OFF

OFF

Upshift and hold
the selector lever

ON

ON

OFF

Downshift and
hold the selector
lever

ON

OFF

ON

AC001252AE

16 PIN

MB991502