Mitsubishi Galant. Manual — part 420

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

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STEP 7. Check the switch output voltage at PCM
connector C-42 by backprobing. ("D" position)
Measure the voltage between terminal 102 and ground by
backprobing.

•

When selector lever position is "P," voltage should be 0.5
volt or less.

•

When selector lever position is "R," voltage should be 0.5
volt or less.

•

When selector lever position is "N," voltage should be 0.5
volt or less.

•

When selector lever position is "D," voltage should be
battery positive voltage.

•

When selector lever position is "3," voltage should be 0.5
volt or less.

•

When selector lever position is "2," voltage should be 0.5
volt or less.

•

When selector lever position is "L," voltage should be 0.5
volt or less.

Q: Is the voltage normal?

YES : Go to Step 8.
NO : Turn the ignition switch to "LOCK" (OFF) position.

Repair it because of the harness damage between
the Park/Neutral position switch connector B-39
terminal 1 and PCM connector C-42 terminal 102.

STEP 8. Check the switch output voltage at PCM
connector C-42 by backprobing. ("3" position)
Measure the voltage between terminal 109 and ground by
backprobing.

•

When selector lever position is "P," voltage should be 0.5
volt or less.

•

When selector lever position is "R," voltage should be 0.5
volt or less.

•

When selector lever position is "N," voltage should be 0.5
volt or less.

•

When selector lever position is "D," voltage should be 0.5
volt or less.

•

When selector lever position is "3," voltage should be
battery positive voltage.

•

When selector lever position is "2," voltage should be 0.5
volt or less.

•

When selector lever position is "L," voltage should be 0.5
volt or less.

Q: Is the voltage normal?

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

Repair it because of the harness damage between
the Park/Neutral position switch connector B-39
terminal 5 and PCM connector C-42 terminal 109.

AC001906

C-42 CONNECTOR
HARNESS SIDE VIEW

AE

AC001907

C-42 CONNECTOR
HARNESS SIDE VIEW

AE

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

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STEP 9. Check the switch output voltage at PCM
connector C-42 by backprobing. ("2" position)
Measure the voltage between terminal 122 and ground by
backprobing.

•

When selector lever position is "P," voltage should be 0.5
volt or less.

•

When selector lever position is "R," voltage should be 0.5
volt or less.

•

When selector lever position is "N," voltage should be 0.5
volt or less.

•

When selector lever position is "D," voltage should be 0.5
volt or less.

•

When selector lever position is "3," voltage should be 0.5
volt or less.

•

When selector lever position is "2," voltage should be
battery positive voltage.

•

When selector lever position is "L," voltage should be 0.5
volt or less.

Q: Is the voltage normal?

YES : Go to Step 10.
NO : Turn the ignition switch to "LOCK" (OFF) position.

Repair it because of the harness damage between
the Park/Neutral position switch connector B-39
terminal 2 and PCM connector C-42 terminal 122.

STEP 10. Check the switch output voltage at PCM
connector C-42 by backprobing. ("L" position)
Measure the voltage between terminal 110 and ground by
backprobing.

•

When selector lever position is "P," voltage should be 0.5
volt or less.

•

When selector lever position is "R," voltage should be 0.5
volt or less.

•

When selector lever position is "N," voltage should be 0.5
volt or less.

•

When selector lever position is "D," voltage should be 0.5
volt or less.

•

When selector lever position is "3," voltage should be 0.5
volt or less.

•

When selector lever position is "2," voltage should be 0.5
volt or less.

•

When selector lever position is "L," voltage should be
battery positive voltage.

Q: Is the voltage normal?

YES : Go to Step 11.
NO : Turn the ignition switch to "LOCK" (OFF) position.

Repair it because of the harness damage between
the Park/Neutral position switch connector B-39
terminal 6 and PCM connector C-42 terminal 110.

AC001908

C-42 CONNECTOR
HARNESS SIDE VIEW

AE

AC001946

C-42 CONNECTOR
HARNESS SIDE VIEW

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AUTOMATIC TRANSAXLE DIAGNOSIS

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STEP 11. Using scan tool MB991502, check data list item
61: Park/Neutral Position Switch.

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 item 61:

Park/Neutral Position Switch.

•

Move the selector lever to "P," "R," "N," "D," "3," "2," "L"
positions to confirm whether the MUT-II.

(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.00-8

.

NO : Replace the PCM.

AC003081AC

MB991502

DATA LINK
CONNECTOR

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

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DTC 29: Vehicle Speed Sensor System

AC004617

Vehicle Speed Sensor System Circuit

AB

AC004308AB

CONNECTOR: C-17

AC004287

CONNECTOR: C-30

AE