Mitsubishi Galant 9G. Manual — part 450

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-18

STEP 2. Measure the power supply voltage at auto-cruise
control switch connector C-302 by backprobing.
(1) Remove the air bag module (driver’s side). (Refer to

GROUP 52B, Air Bag Modules and Clock Spring

P.52B-369

).

(2) Connect the negative (

−) battery cable.

(3) Do not disconnect auto-cruise control switch connector

C-302.

(4) Turn the ignition switch to the "ON" position.
(5) The "CRUISE" (MAIN) switch to the "OFF" position.

(6) Measure the power supply voltage between auto-cruise

control switch connector C-302 terminal 2 and ground by
backprobing.

(7) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.7 and 5.0 volts?

YES : Go to Step 9.
NO : Go to Step 3.

AC305235AB

C-302 (Y)

CONNECTOR: C-302

C-302 HARNESS

CONNECTOR:

COMPONENT SIDE

CLOCK

SPRING

1 2 3

AC205053 AC

C-302 HARNESS
CONNECTOR:
HARNESS SIDE

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

17-19

STEP 3. Measure the power supply voltage at PCM
connector B-19.
(1) Disconnect all the connectors from the PCM.

(2) Connect special tool MB991923 between the PCM and the

body-side harness connector.

(3) Turn the ignition switch to the "ON" position.
(4) The "CRUISE" (MAIN) switch to the "OFF" position.

AC305710

B-19 HARNESS

CONNECTOR:

COMPONENT SIDE

AC

B-19 (B)

CONNECTOR: B-19

AIR CLEANER

PCM

AC209793AI

PCM

MB991923

BODY SIDE
HARNESS

SPECIAL TOOL 18-PIN CONNECTOR
(PCM CONNECTOR B-19)

B-19 (B)

4 3 2 1

7 6 5

8 9

11 10

14 13 12

18 17 16 15

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

17-20

(5) Measure the power supply voltage between special tool

18-pin connector terminal 12 (PCM connector B-19 terminal
12) and ground.

(6) Turn the ignition switch to the "LOCK" (OFF) position.
(7) Disconnect special tool MB991923 between the PCM and

the body-side harness connector.

(8) Reconnect all the connectors to the PCM.
Q: Is the measured voltage between 4.7 and 5.0 volts?

YES : Go to Step 6.
NO : Go to Step 4.

STEP 4. Check PCM connector B-19 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 5.
NO : Repair or replace the faulty connector. (Refer to

GROUP 00E, Harness Connector Inspection

P.00E-2

). Install the air bag module (driver’s side).

(Refer to GROUP 52B, Air Bag Modules and Clock
Spring

P.52B-369

). Then go to Step 18.

AC209616 AB

SPECIAL TOOL 18-PIN
CONNECTOR:
COMPONENT SIDE

AC305710

B-19 HARNESS

CONNECTOR:

COMPONENT SIDE

AC

B-19 (B)

CONNECTOR: B-19

AIR CLEANER

PCM

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-21

STEP 5. Check the harness for short circuit to ground
between the PCM connector B-19 terminal 12 and the
auto-cruise control switch connector C-302 terminal 2.
(1) Disconnect PCM connector B-19 and measure at the

harness connector side.

(2) Turn the ignition switch to the "LOCK" (OFF) position.

(3) Measure the continuity between PCM connector B-19

terminal 12 and ground.

(4) Reconnect PCM connector B-19.
Q: Is the measured continuity open circuit?

YES : Install the air bag module (driver’s side). (Refer to

GROUP 52B, Air Bag Modules and Clock Spring

P.52B-369

). Then go to Step 17.

NO : Go to Step 6.

AC305710

B-19 HARNESS

CONNECTOR:

COMPONENT SIDE

AC

B-19 (B)

CONNECTOR: B-19

AIR CLEANER

PCM

AC209263AD

B-19 HARNESS
CONNECTOR:
COMPONENT SIDE