Mitsubishi Montero (2004+). Manual — part 894

AUTOMATIC TRANSMISSION DIAGNOSIS

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AUTOMATIC TRANSMISSION

23A-151

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LOGIC FLOW CHARTS (Monitor Sequence)

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DTC SET CONDITIONS

Check Conditions, Judgement Criteria

• Transmission range switch: multiple signal. (30

seconds)

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OBD-II DRIVE CYCLE PATTERN
Start the engine, keep the vehicle stopped in P, R, N
and D ranges respectively for more than one minute,
and turn "LOCK" (OFF) the ignition switch. Then
restart the engine, and stop the vehicle in P, R, N and
D ranges respectively for more than one minute.

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TROUBLESHOOTING HINTS (THE MOST LIKELY
CAUSES FOR THIS CODE TO BE SET ARE:)

• Malfunction of the transmission range switch

• Malfunction of the ignition switch

• Damaged harness, connector

• Malfunction of the PCM

AC205064

START

Is there no
input signal?

Yes

No

Continuous failure
for 30 secs.

Yes

Yes

Yes

No

No

No

Continuous failure
for 30 secs.

Is there more than
one input signal?

Malfunction

Good

Malfunction

END

AUTOMATIC TRANSMISSION DIAGNOSIS

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AUTOMATIC TRANSMISSION

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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. Check the transmission range switch.
Measure the resistance between the terminals for each trans-
mission range as indicated in the table below.

Q: Is the measured resistance less than 2 ohms for each

selector position?
YES : Go to Step 2.
NO : Replace the transmission range switch. Refer to

GROUP 23B, Transmission

P.23B-14

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STEP 2. Check transmission range switch connector C-04
for loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Are the connector and terminals in good condition?

YES : Go to Step 3.
NO : Repair or replace the damaged components. Refer to

GROUP 00E, Harness Connector Inspection

P.00E-2

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TRANSMISSION
RANGE

TERMINAL
CONNECTION OF
TESTER

SPECIFIED
CONDITION

P

1

− 7

Less than 2 ohms.

R

7

− 8

N

2

− 7

D

3

− 7

ACX01187AD

P

R

N

D

AC204395

CONNECTOR : C-04

AF

C-04 (B)

4
9

5

10

3
8

2
7

6

1

AUTOMATIC TRANSMISSION DIAGNOSIS

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AUTOMATIC TRANSMISSION

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STEP 3. Check PCM connector D-134 for loose, corroded
or damaged terminals, or terminals pushed back in the
connector.
Q: Are the connector 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

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AC204681AC

CONNECTOR: D-134

D-134 (GR)

61 62

63 64

65 66 67 68 69 70 71 72 73

82

89

81

88

80

79

78

77

87

86

85

76

75

74

84

83

AUTOMATIC TRANSMISSION DIAGNOSIS

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AUTOMATIC TRANSMISSION

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STEP 4. Measure the transmission range switch output
voltage at PCM connector D-134 by backprobing. ("P"
position)
(1) Do not disconnect connector D-134.
(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal 66 and ground by

backprobing.

• When transmission range is "P," voltage should mea-

sure battery positive voltage.

• When transmission range is "R," voltage should mea-

sure 0.5 volt or less.

• When transmission range is "N," voltage should mea-

sure 0.5 volt or less.

• When transmission range is "D," voltage should mea-

sure 0.5 volt or less.

Q: Is the measured voltage within the specified range?

YES : Go to Step 9.
NO : Turn the ignition switch to the "LOCK" (OFF) position.

Go to Step 5.

AC204681AC

CONNECTOR: D-134

D-134 (GR)

61 62

63 64

65 66 67 68 69 70 71 72 73

82

89

81

88

80

79

78

77

87

86

85

76

75

74

84

83

AC204918 BF

D-134 HARNESS CONNECTOR :
HARNESS SIDE

76

85

65

72

71

73

82

75

81

74

63 64

66

70

69

68

67

78

87

79

88 89

80

77

86

62

61

83 84