Mitsubishi Eclipse. Manual — part 689

AUTO-CRUISE CONTROL

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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

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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

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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

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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