Mitsubishi Montero (1998+). Manual - part 82

         1) To clear trouble codes, disconnect battery cable, or use

alternative method to prevent memory loss.

         2) Turn ignition on. Turn main cruise control switch and SET

switch to ON position, and within one second, turn RES switch to ON

position. Hold stoplight switch and cruise control switch in ON

position for greater than 5 seconds. Verify codes are cleared.

         DIAGNOSTIC TESTS

         CODE 11:  VACUUM PUMP DRIVE SYSTEM

         Code 11 is displayed if release valve, control valve and

motor drive signals from vacuum pump are not input to cruise control

ECU. Probable causes are:

      *  Malfunction of vacuum pump.

      *  Malfunction of stoplight switch.

      *  Malfunction of connector.

      *  Malfunction of harness.

      *  Malfunction of cruise control ECU.

         1) Check vacuum pump. See VACUUM PUMP TEST under COMPONENT

TESTS. If vacuum pump is defective, replace vacuum pump. If vacuum

pump is okay, go to next step.

         2) Disconnect cruise control actuator harness connector A-57

or A-95. See Fig. 5. At harness side of connector, check voltage

between terminal No. 1 and ground. If battery voltage is present, go

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

switch. See BRAKELIGHT/STOPLIGHT SWITCH TEST under COMPONENT TESTS.

Replace switch if defective. Check cruise control main switch harness

connector C-01 and stoplight switch harness connector C-55. Repair as

necessary. If malfunction remains, check harness between cruise

control main switch and vacuum pump. Repair as necessary.

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

At harness side of connector, check voltage between ground and

terminals No. 12 (driving release valve), No. 13 (driving control

valve), and No. 26 (driving motor). If battery voltage is present, go

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

connectors A-57 or A-95 and C-111 as necessary. See  Figs. 5 and 24. If

malfunction remains, check and repair harness between vacuum pump and

cruise control ECU as necessary.

         4) Check cruise control ECU connector C-50. Repair as

necessary. If malfunction remains, replace cruise control ECU.

         CODE 12:  VEHICLE SPEED SENSOR SIGNAL

         Code 12 is displayed if vehicle speed signals from vehicle

speed sensor are not input to cruise control ECU when vehicle speed is

25 MPH or more. Probable causes are:

      *  Malfunction of VSS.

      *  Malfunction of connector.

      *  Malfunction of harness.

      *  Malfunction of cruise control ECU.

         1) Check vehicle speed sensor. See  VEHICLE SPEED SENSOR TEST

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

speed sensor is defective, repair or replace as necessary.

         2) Disconnect combination meter connector C-06. See  Fig. 10.

At harness side of connector, with ignition switch in ON position,

measure voltage between terminal No. 1 and ground. If voltage is 4.5

volts or more, go to next step. If voltage is less than 4.5 volts,

check cruise control ECU connector C-50 and joint connector C-130.

Repair as necessary. See Figs. 13, 16 and 28. If malfunction remains,

check harness between combination meter (instrument cluster) and

cruise control ECU. Repair as necessary.

         3) Disconnect combination meter connector C-04. See  Fig. 9.

Check for continuity at harness side between terminal No. 43 and

ground. If continuity is present, go to next step. If continuity is

not present, check harness between combination meter and ground.

Repair as necessary.

         4) Inspect combination meter connector C-04. If connector is

defective, repair as necessary. If connector is okay and malfunction

remains, replace cruise control ECU.

         CODE 14:  VACUUM PUMP POWER SUPPLY

         Code 14 is displayed when drive signals for vacuum pump

release valve, control valve and motor are not input into cruise

control ECU. Probable causes are:

      *  Malfunction of stoplight switch.

      *  Malfunction of connector.

      *  Malfunction of harness.

      *  Malfunction of cruise control ECU.

         1) Disconnect vacuum pump connector A-105. See  Fig. 6. At

harness side of connector, check voltage between terminal No. 1 and

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

voltage is not present, check stoplight switch. See

BRAKELIGHT/STOPLIGHT SWITCH TEST under COMPONENT TESTS. Replace as

necessary. If switch is okay, check connectors to combination meter,

stoplight switch and vacuum pump. Repair as necessary. If connectors

are okay and malfunction remains, check and repair circuit between

cruise control ECU and vacuum pump. If malfunction remains, replace

cruise control ECU.

         2) Check connectors and circuit between cruise control ECU

and vacuum pump. See WIRING DIAGRAMS. Repair as necessary. If

connectors and circuit are okay, replace cruise control ECU.

         CODE 15:  CRUISE CONTROL SWITCH

         Code 15 is displayed if RESUME switch or SET switch remains

on. Probable cause is malfunction of cruise control switch. Replace

cruise control switch.

         CODE 16:  CRUISE CONTROL ECU

         Code 16 is displayed if there is an abnormality in CANCEL

hold circuit or microprocessor monitor circuit in cruise control ECU.

Probable cause is malfunction of cruise control ECU. Replace cruise

control ECU.

         CODE 17:  THROTTLE POSITION SENSOR

         Code 17 is displayed if a voltage of 1.5 volts or more exists

when closed throttle position switch is ON or 0.2 volt or less exists

when closed throttle position switch is OFF for a continuous period of

4 seconds or more. Probable causes are:

      *  Malfunction of throttle position sensor.

      *  Malfunction of connector.

      *  Malfunction of harness.

      *  Malfunction of cruise control ECU.

         1) If PCM DTC P0120 (engine performance code) is also set,

see

CLOSED THROTTLE POSITION SWITCH TEST & THROTTLE POSITION SENSOR TEST

under COMPONENT TESTS. If DTC P0120 is not set, go to next step.

         2) Check cruise control ECU connector C-50. If connector is

okay, go to next step. If connector is defective, repair as necessary.

         3) If malfunction remains, inspect harness between throttle

position sensor and cruise control ECU. Repair as necessary. If

harness is okay, replace cruise control ECU.

         PIN VOLTAGE TESTS

Fig. 36:  Pin Voltage Chart (1 Of 2)

Courtesy of Mitsubishi Motor Sales of America

Fig. 37:  Pin Voltage Chart (2 Of 2)

Courtesy of Mitsubishi Motor Sales of America

         REMOVAL & INSTALLATION