Mitsubishi Eclipse. Manual - part 689

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-37

STEP 8. Check the auto-cruise control switch.
(1) Disconnect auto-cruise control switch. (Refer to 

P.17-92

.)

(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.17-92

.). Then 

check that diagnostic trouble code 15 is not output.

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

P.17-92

.). Then check that diagnostic trouble code 15 

is not output.

SWITCH 
POSITION

TERMINAL 
CONNECTOR 
OF TESTER

SPECIFIED 
CONDITION

"MAIN" switch 
"OFF"

1 

− 2

Open circuit

"MAIN" switch "ON" 1 

− 2

Approximately 3.9 k

Ω

"CANCEL" switch 
"ON"

2 

− 3

Less than 2 ohms

"RESUME" switch 
"ON"

2 

− 3

Approximately 910 

Ω

"SET" switch "ON"

2 

− 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

17-38

STEP 9. Check the output circuit voltage at auto-cruise 
control-ECU connector C-20 (terminal numbers 9 and 12) 
by backprobing.
(1) Do not disconnect auto-cruise control-ECU connector C-20.
(2) Turn the ignition switch to the "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 the "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.17-92

.). Then 

check that diagnostic trouble code 15 is not output.

NO :  Go to Step 10.

STEP 10. Check auto-cruise control-ECU connector C-20.
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 11.

STEP 11. Check the clock spring.
Refer to GROUP 52B, Air Bag Modules and Clock Spring 

P.52B-146

.

Q: Is the clock spring damaged?

YES : Replace the clock spring. Refer to GROUP 52B, Air 

Bag Modules and Clock Spring 

P.52B-146

. Then 

check that diagnostic trouble code 15 is not output.

NO :  Go to Step 12.

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

AC103149AB

C-20 CONNECTOR
HARNESS SIDE VIEW

AC001451

CONNECTOR: C-20

AB

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-39

STEP 12. Check auto-cruise control switch connector 
C-82, clock spring connector C-84 and C-96.
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 13.

STEP 13. Check the harness wire between auto-cruise 
control switch connector C-82 (terminal numbers 2 and 3) 
and auto-cruise control-ECU connector C-20 (terminal 
numbers 9 and 12).
Q: Is any harness wire between auto-cruise control switch 

connector C-82 (terminal numbers 2 and 3) and 
auto-cruise control-ECU connector C-20 (terminal 
numbers 9 and 12) 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.17-92

.). 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.

AC106551AB

CONNECTORS: C-82, C-84, C-96

C-96

C-84

C-82

CLOCK SPRING

AC001451

CONNECTOR: C-20

AB

AC106551AC

CONNECTORS: C-82

CLOCK SPRING

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-40

DIAGNOSIS

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

P.17-92

.) 

Check that diagnostic trouble code 16 is not output.

DTC 17: Throttle Position Sensor and Idle Position Signal System

AC304741AB

Throttle Position Sensor System Circuit

AC103106AB

CONNECTOR: B-07 <2.4L ENGINE>

AC103107

CONNECTOR: B-07 <3.0L ENGINE>

AC