Mitsubishi Montero (1998+). Manual — part 79

Fig. 27: Identifying Junction Block Connectors & Joint Connectors:

Junction Block (Rear)

Courtesy of Mitsubishi Motor Sales of America

Fig. 28: Identifying Junction Block Connectors & Joint Connectors:

Joint Connector C-130

Courtesy of Mitsubishi Motor Sales of America

Fig. 29: Identifying Junction Block Connectors & Joint Connectors:

Joint Connector C-131

Courtesy of Mitsubishi Motor Sales of America

Fig. 30: Identifying Junction Block Connectors & Joint Connectors:

Joint Connector C-132

Courtesy of Mitsubishi Motor Sales of America

Test No. 2

Malfunction of cruise control main switch or cruise control

ECU ground circuit may be present. Probable causes are:

* Malfunction of cruise control main switch.

* Malfunction of connector.

* Malfunction of harness.

* Malfunction of cruise control ECU.

1) Check cruise control main switch. See

CRUISE CONTROL SWITCH TESTS under COMPONENT TESTS. If switch is okay,

go to next step. If switch is defective, repair or replace as

necessary.

2) Disconnect main switch connector C-01. See Fig. 8. At

harness side of connector, measure voltage between connector terminal

No. 1 and ground. If battery voltage is present, go to next step. If

battery voltage is not present, check condition of junction block

connectors C-94 and C-101. If connector(s) are defective, repair as

necessary. If connectors are okay and malfunction remains, check

harness between cruise control main switch and power supply. Repair as

necessary.

3) Check condition of cruise control main switch connector C-

01, joint connector C-132 and cruise control ECU connector C-50.

Repair as necessary. If connectors are okay and malfunction remains,

check harness between cruise control main switch and ground, and

between main switch and cruise control ECU. Repair as necessary.

4) Disconnect cruise control ECU connector C-50. See Fig. 13.

Check for continuity between ground and connector terminals No. 6, 8,

and 14. If continuity is present, go to next step. If continuity is

not present, check condition of connectors between front wiring

harness, dash wiring harness and joint connector C-132. Repair as

necessary. If malfunction remains, check harness between cruise

control main switch and power supply. Repair as necessary.

5) Check condition of cruise control ECU connector C-50.

Repair as necessary. If connector is okay and malfunction persists,

replace cruise control ECU.

Test No. 3

Malfunction of cruise control main switch or cruise control

ECU ground circuit may be present. Probable causes are:

* Malfunction of cruise control main switch.

* Malfunction of clockspring.

* Malfunction of connector.

* Malfunction of harness.

1) Check cruise control switches. See

CRUISE CONTROL SWITCH TESTS under COMPONENT TESTS. Replace any failed

switch. If switches are okay, check clockspring. See CLOCKSPRING TEST

under COMPONENT TESTS. If clockspring is okay, go to next step.

Replace clockspring if not okay.

2) Disconnect clockspring connector C-128 and measure voltage

between terminal No. 2 and ground. See Fig. 15. If battery voltage is

present, go to next step. If battery voltage is not present, check

condition of IOD connector A-09X, joint connector C-131, junction

block connector C-81, junction block connector C-94 and junction block

connector C-101. Repair as necessary. See Figs. 4, 16, 19, 21, 22, 26,

27 and 29. If connectors are okay and malfunction remains, check

harness between clockspring and power supply. Repair as necessary.

3) Check condition of cruise control ECU connector C-50 and

clockspring connector C-128. Repair as necessary. See Figs. 13 and 15.

If connectors are okay and malfunction remains, check harness between

clockspring and cruise control ECU. Repair as necessary.

Test No. 4

Malfunction of stoplight switch or stoplight circuit may be

present. Probable causes are:

* Malfunction of stoplight switch.

* Malfunction of connector.

* Malfunction of harness.

* Malfunction of cruise control ECU.

1) If stoplight does not illuminate with brake pedal

depressed, go to next step. If stoplight illuminates with pedal

depressed, replace cruise control ECU.

2) Check stoplight switch. See

BRAKELIGHT/STOPLIGHT SWITCH TEST under COMPONENT TESTS. Replace

stoplight switch as necessary. If stoplight switch is okay, go to next

step.

3) Disconnect stoplight switch connector C-55. See Fig. 14.

At harness side of connector, measure voltage between terminal No. 2

and ground. If battery voltage is present, go to next step. If battery

voltage is not present, check condition of joint connector C-131 and

junction block connector C-94. Repair as necessary. See Fig. 26. If

connectors are okay and malfunction remains, check harness between

stoplight switch and power supply. Repair as necessary.

4) Check condition of cruise control ECU connector C-50 and

stoplight switch connector C-55. Repair as necessary. If connectors

are okay and malfunction remains, check harness between stoplight

switch and cruise control ECU. Repair as necessary.

Test No. 5