Mitsubishi Eclipse. Manual - part 697

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-69

STEP 2. transmission range switch connector B-41.
Q: Is the connector damaged?

YES : Repair or replace connector. Refer to GROUP 00E, 

Harness Connector Inspection 

P.00E-2

. Then check 

that the malfunction is eliminated.

NO :  Go to Step 3.

STEP 3. Check the circuit at the transmission range 
switch.
(1) Disconnect the transmission range switch connector B-41.
(2) Measure the continuity transmission range switch 

connector terminals.

Q: Is the continuity meet the table above?

YES : Go to Step 4.
NO :  Replace the transmission range switch. Refer to 

GROUP 23B, Transaxle 

P.23B-10

. Then check that 

the malfunction is eliminated.

AC001482

CONNECTOR: B-41

DIPSTICK

AB

ITEM

TERMINAL CONNECTOR 
OF TESTER

SPECIFIED 
CONDITION

P

3 

− 8, 9 − 10

Less than 2 
ohms

N

4 

− 8, 9 − 10

AC005865

P

R

N

D

3

2

L

AB

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-70

STEP 4. Check the output circuit voltage at auto-cruise 
control-ECU connector C-20 (terminal number 13) by 
backprobing.
(1) Do not disconnect auto-cruise control switch connector 

C-20.

(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 13 and ground by 

backprobing.

• Voltage should be battery positive voltage. (When select 

lever is in a position other than "N" range.)

• Voltage should be 0.5 volt or less. (When select lever is 

in "N" range.)

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage within specifications?

YES : Check that the malfunction is eliminated. If the 

malfunction is not eliminated, replace the auto-cruise 
control-ECU (Refer to 

P.17-92

.). Then check that the 

malfunction is eliminated.

NO :  Go to Step 5.

STEP 5. 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 the malfunction is eliminated.

NO :  Go to Step 6.

STEP 6. Check intermediate connector C-28.
Q: Is the connector damaged?

YES : Repair or replace connector. Refer to GROUP 00E, 

Harness Connector Inspection 

P.00E-2

. Then check 

that the malfunction is eliminated.

NO :  Go to Step 7.

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

AC103109

C-20 CONNECTOR
HARNESS SIDE VIEW

AC

AC001451

CONNECTOR: C-20

AB

AC101201AB

CONNECTOR: C-28

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-71

STEP 7. Check the harness wire between transmission 
range switch connector B-41 (terminal number 10) and 
auto-cruise control-ECU connector C-20 (terminal number 
13).
Q: Is any harness wire between transmission range switch 

connector B-41 (terminal number 10) and auto-cruise 
control-ECU connector C-20 (terminal number 13) 
damaged?
YES : Repair the harness wire and then check that the 

malfunction is eliminated.

NO :  Check that the malfunction is eliminated. If the 

malfunction is not eliminated, replace the auto-cruise 
control-ECU (Refer to 

P.17-92

.). Then check that the 

malfunction is eliminated.

INSPECTION PROCEDURE 5: When the Auto-cruise Control "CANCEL" Switch is Set to ON, 
Auto-cruise Control is not Cancelled.

.

TECHNICAL DESCRIPTION (COMMENT)
The cause is probably an open-circuit in the output in 
the circuit inside the "CANCEL" switch.

.

TROUBLESHOOTING HINTS

• Malfunction of the auto-cruise control switch.

DIAGNOSIS

Replace the auto-cruise control switch. (Refer to 

P.17-92

.) 

Then check the malfunction is eliminated.

INSPECTION PROCEDURE 6: Auto-cruise Control cannot be Set.

.

TECHNICAL DESCRIPTION (COMMENT)
The fail-safe function is probably cancelling 
auto-cruise control. In this case, scan tool MB991958 
can be used to check the trouble symptoms in each 
system by checking the diagnostic trouble codes. 
The scan tool can also be used to check if the cir-
cuits of each input switch are normal or not by check-
ing the input switch codes. 

.

TROUBLESHOOTING HINTS

• Malfunction of the auto-cruise control switch.

• Malfunction of the auto-cruise control-ECU.

AC001482

CONNECTOR: B-41

DIPSTICK

AB

AC001451

CONNECTOR: C-20

AB

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-72

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (MUT-III sub assembly)

• MB991824: Vehicle Communication Interface

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

• MB991223: Harness Set

STEP 1. Can the auto-cruise control-ECU communicate 
with scan tool MB991958?

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) Using scan tool MB991958.
(2) Connect scan tool MB991958 to the data link connector.
(3)  Turn the ignition switch to the "ON" position.
Q: Can the auto-cruise control-ECU communicate with the 

scan tool?
YES : Go to Step 2.
NO :  Inspect each trouble symptom. (Refer to Inspection 

Procedure number 1 

P.17-50

.)

STEP 2. Is any diagnostic trouble code output?
Q: Is any diagnostic trouble code output?

YES : Diagnostic trouble code number 11, 12, 14, 15, 16 or 

17 is output, refer to the following. (Code number 11 

P.17-13

.) (Code number 12 

P.17-18

.) <M/T> (Code 

number 12 

P.17-21

.) <A/T> (Code number 14 

P.17-24

.) (Code number 15 

P.17-33

.) (Code number 

16 

P.17-39

.) (Code number 17 

P.17-40

.) Then check 

that the malfunction is eliminated.

NO :  Go to Step 3.

AC303127

AB

MB991911

16-PIN

MB991827

MB991824