Mitsubishi Galant 9G. Manual — part 458

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-50

STEP 21. Using scan tool MB991958, read the diagnostic
trouble codes.

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.

(Refer to

P.17-11

).

(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to read the diagnostic trouble

codes. (Refer to

P.17-11

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.
Q: Is DTC 22 set?

YES : Replace the PCM. [Refer to GROUP 13A, Power

Control Module (PCM)

P.13A-1140

] <2.4L engine> or

[Refer to GROUP 13B, Power Control Module (PCM)

P.13B-1192

] <3.8L engine>. Then go to Step 22.

NO : 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.00-14

).

STEP 22. Using scan tool MB991958, read the diagnostic
trouble codes.

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.

(Refer to

P.17-11

).

(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to read the diagnostic trouble

codes. (Refer to

P.17-11

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.
Q: Is DTC 22 set?

YES : Return to Step 1.
NO : The procedure is complete.

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-51

DTC 23: Powertrain Control Module (PCM) and Its Related Components

.

DTC SET CONDITIONS

This DTC is set when there is an failure in the PCM
and its related components.

.

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

• Malfunction of the MFI system.

• Malfunction of the A/T system.

• Malfunction of the PCM.

DIAGNOSIS

Required Special Tools:

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

• MB991824: V.C.I.

• MB991827: MUT-III USB Cable

• MB991910: MUT-III Main Harness A

STEP 1. Using scan tool MB991958, read the MFI system
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.

(Refer to

P.17-11

).

(2) Turn the ignition switch to the "ON" position.
(3) Check for MFI system diagnostic trouble code. (Refer to

GROUP 13A, MFI Diagnosis

− Diagnostic Function − How

to Read and Erase Diagnostic Trouble Code

P.13A-6

)

<2.4L engine> or (Refer to GROUP 13B, MFI Diagnosis

−

Diagnostic Function

− How to Read and Erase Diagnostic

Trouble Code

P.13B-6

) <3.8L engine>.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.
Q: Is any DTC set?

YES : Diagnose the MFI system. (Refer to GROUP 13A,

MFI Diagnosis

− Diagnostic Trouble Code Chart

P.13A-33

) <2.4L engine> or (Refer to GROUP 13B,

MFI Diagnosis

− Diagnostic Trouble Code Chart

P.13B-34

) <3.8L engine>. Then go to Step 4.

NO : Go to Step 2.

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-52

STEP 2. Using scan tool MB991958, read the A/T system
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.

(Refer to

P.17-11

).

(2) Turn the ignition switch to the "ON" position.
(3) Check for A/T system diagnostic trouble code. (Refer to

GROUP 23A, A/T Diagnosis

− Diagnostic Function − How

to Read and Erase Diagnostic Trouble Code

P.23A-15

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.
Q: Is any DTC set?

YES : Diagnose the A/T system. (Refer to GROUP 23A, A/T

Diagnosis

− Diagnostic Trouble Code Chart

P.23A-42

). Then go to Step 4.

NO : Go to Step 3.

STEP 3. Using scan tool MB991958, read the auto-cruise
control system 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.

(Refer to

P.17-11

).

(2) Turn the ignition switch to the "ON" position.
(3) Use scan tool MB991958 to read the auto-cruise control

system diagnostic trouble codes. (Refer to

P.17-11

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.
Q: Is DTC 23 set?

YES : Replace the PCM. [Refer to GROUP 13A, Power

Control Module (PCM)

P.13A-1140

] <2.4L engine> or

[Refer to GROUP 13B, Power Control Module (PCM)

P.13B-1192

] <3.8L engine>. Then go to Step 4.

NO : 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.00-14

).

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-53

STEP 4. Using scan tool MB991958, read the auto-cruise
control system 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.

(Refer to

P.17-11

).

(2) Turn the ignition switch to the "ON" position.
(3) Use scan tool MB991958 to read the auto-cruise control

system diagnostic trouble codes. (Refer to

P.17-11

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.
Q: Is DTC 23 set?

YES : Return to Step 1.
NO : The procedure is complete.

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827