Mitsubishi Galant. Manual — part 365

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-30

STEP 3. Check the clock spring.
Refer to GROUP 52B, Air Bag Modules and Clock Spring

P.52B-67

.

Q: Is the clock spring damaged?

YES : Replace the clock spring.

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

P.52B-67

.

Then check that diagnostic trouble code 15 is not
output.

NO : Go to Step 4.

STEP 4. Check clock spring connector C-61.
Q: Is any connector damaged?

YES : Repair or replace connector.

Refer to GROUP 00E, Harness Connector Inspection

P.00E-2

.

Then check that diagnostic trouble code 15 is not
output.

NO : Check the harness wire between multi-purpose fuse

No.13 and auto-cruise control switch connector C-64
for open circuit or damage.
Then repair if necessary.
Then check that diagnostic trouble code 15 is not
output.

STEP 5. Check the output circuit voltage at auto-cruise
control switch connector C-64 by backprobing.
(1) Do not disconnect auto-cruise control switch connector C-

64.

(2) Turn the ignition switch to "ON" position.
(3) Measure the voltage between terminal 2 and ground by

backprobing.

•

Voltage should be battery positive voltage.
(MAIN switch is at the "ON" position.)

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

backprobing.

•

Voltage should be between 6.8 and 7.2 volts.
(MAIN switch is at the "ON" position.)

•

Voltage should be between 3.5 and 5.0 volts.
(All switches are at the "OFF" position.)

•

Voltage should be between 0.4 and 2.3 volts.
("SET" switch is at the "ON" position)

•

Voltage should be between 2.3 and 3.5 volts.
("RESUME" switch is at the "ON" position.)

•

Voltage should be between 1 volt or less.
("CANCEL" switch is at the "ON" position.)

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

Q: Is the voltage within specifications?

YES : Go to Step 8.
NO : Go to Step 6.

AC004585

CONNECTOR: C-61

AB

1 2

3

ACX01913 AD

C-64 CONNECTOR
HARNESS SIDE VIEW

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-31

STEP 6. Check auto-cruise control switch connector C-64.
Q: Is the connector damaged?

YES : Repair or replace connector.

Refer to GROUP 00E, Harness Connector Inspection

P.00E-2

.

Then check that diagnostic trouble code 15 is not
output.

NO : Go to Step 7.

STEP 7. Check the auto-cruise control switch.
(1) Disconnect auto-cruise control switch.
(2) Measure the resistance between the terminals when each

of the "SET", "RESUME", "CANCEL" and MAIN switch is
pressed.

Q: Is the values measured correspond to those in the table

below?
YES : Check that diagnostic trouble code 15 is not output.

If diagnostic trouble code 15 is output, replace the
auto-cruise control-ECU. (Refer to

P.17-74

.)

Then check that diagnostic trouble code 15 is not
output.

NO : Replace the auto-cruise control switch. (Refer to

P.17-74

.)

Then check that diagnostic trouble code 15 is not
output.

AC004584

CONNECTOR: C-64

AB

SWITCH
POSITION

RESISTANCE BETWEEN TERMINALS

MAIN switch
"OFF"

Terminal 1 and 2

Less than 2 ohm

MAIN switch
"ON"

Terminal 1 and 2

Approximately 3.9 k

Ω

"CANCEL"
switch "ON"

Terminal 2 and 3

Approximately 0

Ω

"RESUME"
switch "ON"

Terminal 2 and 3

Approximately 910

Ω

"SET" switch
"ON"

Terminal 2 and 3

Approximately 220

Ω

ACX01178 AB

OFF

OFF

OFF

OFF

ON

ON

ON

ON

CAN

MAIN

RES

SET

1

2

3

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-32

STEP 8. Check the output circuit voltage at auto-cruise
control-ECU connector C-52 by backprobing.
(1) Do not disconnect auto-cruise control-ECU connector C-52.
(2) Turn the ignition switch to "ON" position.
(3) Measure the voltage between terminal 12 and ground by

backprobing.

•

Voltage should be battery positive voltage.
(The MAIN switch is at the "ON" position.)

(4) Measure the voltage between terminal 9 and ground by

backprobing.

•

Voltage should be between 6.8 and 7.2 volts.
(MAIN switch is at the "ON" position.)

•

Voltage should be between 3.5 and 5.0 volts.
(All switches are at the "OFF" position.)

•

Voltage should be between 0.4 and 2.3 volts.
("SET" switch is at the "ON" position.)

•

Voltage should be between 2.3 and 3.5 volts.
("RESUME" switch is at the "ON" position.)

•

Voltage should be between 1 volt or less.
("CANCEL" switch is at the "ON" position.)

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

Q: Is the voltage within specifications?

YES : Check that diagnostic trouble code 15 is not output.

If diagnostic trouble code 15 is output, replace the
auto-cruise control-ECU. (Refer to

P.17-74

.)

Then check that diagnostic trouble code 15 is not
output.

NO : Go to Step 9.

STEP 9. Check auto-cruise control-ECU connector C-52.
Q: Is the connector damaged?

YES : Repair or replace connector.

Refer to GROUP 00E, Harness Connector Inspection

P.00E-2

.

Then check that diagnostic trouble code 15 is not
output.

NO : Go to Step 10.

STEP 10. Check the clock spring.
Refer to GROUP 52B, Air Bag Modules and Clock Spring

P.52B-67

.

Q: Is the clock spring damaged?

YES : Replace the clock spring.

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

P.52B-67

.

Then check that diagnostic trouble code 15 is not
output.

NO : Go to Step 11.

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

ACX01900AD

C-52 CONNECTOR
HARNESS SIDE VIEW

AC004572AB

CONNECTOR: C-52

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

17-33

STEP 11. Check auto-cruise control switch connector C-
64, clock spring connector C-61.
Q: Is any connector damaged?

YES : Repair or replace connector.

Refer to GROUP 00E, Harness Connector Inspection

P.00E-2

.

Then check that diagnostic trouble code 15 is not
output.

NO : Go to Step 12.

STEP 12. Check the harness wire between auto-cruise
control switch connector C-64 and auto-cruise control-
ECU connector C-52.
Q: Is any harness wire between auto-cruise control switch

connector C-64 and auto-cruise control-ECU connector
C-52 damaged?
YES : Repair harness wire and then check that diagnostic

trouble code 15 is not output.

NO : Check that diagnostic trouble code 15 is not output.

If diagnostic trouble code 15 is output, replace the
auto-cruise control-ECU. (Refer to

P.17-74

.)

Then check that diagnostic trouble code 15 is not
output.

DTC 16: Auto-cruise Control-ECU

DTC SET CONDITIONS
This code is output when a problem is found on the
cancel status hold circuit or microcomputer operation
monitor circuit, which is incorporated in the auto-
cruise control-ECU.

TROUBLESHOOTING HINTS
Malfunction of the auto-cruise control-ECU.

DIAGNOSIS
Replace the auto-cruise control-ECU. (Refer to

P.17-74

.)

Check that diagnostic trouble code 16 is not output.

AC004583AB

C-64

C-61

CONNECTORS: C-61, C-64

AC004584

CONNECTOR: C-64

AB

AC004572AB

CONNECTOR: C-52