Mitsubishi Montero Sport (2004+). Manual - part 694

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-341

STEP 7. Check the harness for open circuit, short circuit to 
ground and damage between combination meter 
connector C-03 terminal 43 and PCM connector C-92 
terminal 121.

Q: Is the harness wire in good condition?

YES : Go to Step 8.
NO :  Repair or replace the harness wire.

AC202395

49

48

50

46

45

44

41 42 43

47

CONNECTOR: C-03

C-03

AB

AC202317

PCM

120

107

119

106

129 130

118

105

117

114115116

126127128

104

111

103

112

108

101102

109110

121122123

124

113

125

CONNECTOR: C-92

C-92 (GR)

AB

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-342

STEP 8. 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 56 set?

YES : Replace the PCM.
NO :  The procedure is complete.

AK303629AB

MB991911

MB991827

MB991824 

16-PIN

Continue

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-343

23A

SYMPTOM PROCEDURES <AUTOMATIC TRANSMISSION>

INSPECTION PROCEDURE 1: Engine does not Crank.

.

COMMENT
If the engine does not crank when the selector lever 
is placed in the "P" or "N" position, the cause is prob-
ably a malfunction of transmission range switch sys-
tem, transmission control cable assembly, engine 
system, torque converter or transmission oil pump.

.

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

• Malfunction of the transmission range switch

• Malfunction of the transmission control cable 

assembly

• Malfunction of the engine system

• Malfunction of the torque converter

• Malfunction of the transmission oil pump

• 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

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 A/T DTCs 27 or 28 set?

YES <DTC 27 set> : Refer to 

P.23A-123

, DTC 27: 

Transmission Range Switch System (Open Circuit).

YES <DTC 28 set> : Refer to 

P.23A-181

, DTC 28: 

Transmission Range Switch System (Short Circuit).

NO :  Go to Step 2.

AK303629AB

MB991911

MB991827

MB991824 

16-PIN

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-344

STEP 2. Check the transmission control cable assembly.

Move the selector lever to each position. The manual control 
lever position of the transmission range switch should match 
the transmission range.
Q: Is the manual control lever position correct?

YES : Go to Step 3.
NO :  Repair the transmission control cable. Refer to 

P.23A-436

, Transmission Range Switch and Control 

Cable Adjustment. Retest the system to verify the 
repair.

STEP 3. Check the engine.

Refer to GROUP 13A, Diagnosis 

− Trouble Symptom Chart − 

Starting 

P.13A-30

.

Q: Is the inspection result good?

YES : Go to Step 4.
NO :  Repair or replace the appropriate engine 

components.

STEP 4. Check the torque converter.
(1) Remove the transmission.

(2) Turn the torque converter and check for a binding or 

sticking condition. Check the ring gear for damaged or 

missing teeth.
NOTE: Since the torque converter drives the oil pump, turn-
ing the torque converter also checks for a binding oil pump. 
If either of these components are damaged the Transmis-
sion will need to be removed for inspection.

Q: Does the torque converter turn freely without any 

missing or damaged teeth?
YES : Go to Step 5.
NO :  Replace the torque converter.

STEP 5. Repair or replace the starter.
Q: Is the symptom eliminated?

YES : The procedure is complete.
NO :  Go to Step 6.

AC004273

P

P

R

N

D
3
2

L

AB

PARK/NEUTRAL
POSITION SWITCH

MANUAL
CONTROL
LEVER

AC103774

TORQUE CONVERTER

AE