Mitsubishi Eclipse. Manual - part 838

 

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Mitsubishi Eclipse. Manual - part 838

 

 

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-361

.

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 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 122, 110).

.

COMMENT
The cause is probably a malfunction of the transmis-
sion range switch circuit, shift switch assembly circuit 
or a defective PCM.

.

TROUBLESHOOTING HINTS (The most likely 
causes for this case:)

• Malfunction of the transmission range switch

• Malfunction of the shift switch assembly select 

switch

• 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:

•  MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

AC106814AB

CONNECTORS: C-111, C-112

JUNCTION BLOCK
(FRONT VIEW)

C-111

C-112

C-111

C-112

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-362

STEP 1. Using scan tool MB991958, read the A/T 
diagnostic trouble code.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Check for A/T diagnostic trouble code.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC 27 or 28 set?

YES <DTC 27 set> : Refer to 

P.23A-155

, DTC 27: 

Transmission Range Switch System (Open Circuit).

YES <DTC 28 set> : Refer to 

P.23A-192

, DTC 28: 

Transmission Range Switch System (Short Circuit).

NO :  Go to Step 2.

AC303127

AB

MB991911

16-PIN

MB991827

MB991824 

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-363

STEP 2. Using scan tool MB991958, check data list item 67: 
Select Switch, item 68: Shift Switch (Up), item 69: Shift 
Switch (Down).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to data reading mode for following 

items.

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

c. item 69: Shift Switch (Down)

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

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the switch operating properly?

YES : It can be assumed that 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 3.
NO <If item 68 and 69 both are NG> : Go to Step 5.
NO <If only item 67 is NG> : Go to Step 9.
NO <If only item 68 is NG> : Go to Step 17.
NO <If only item 69 is NG> : Go to Step 22.

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

AC303127

AB

MB991911

16-PIN

MB991827

MB991824 

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-364

STEP 3. Check PCM connector C-61 <2.4L Engine> or C-63 
<3.0L Engine> and shift switch assembly connector C-65 
for looser, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Are the connectors and terminals in good condition?

YES : Go to Step 4.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

AC001657

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

PCM

BC

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

AC001741

CONNECTOR: C-65

AS

C-65

 

 

 

 

 

 

 

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