Mitsubishi Montero (1998+). Manual - part 87

replace ECU.

         4) Check harness connectors to junction block and ignition

switch. Repair as necessary. If connectors are okay, check circuit

between ignition switch and junction block, and between fusible link

No. 2 and junction block. See WIRING DIAGRAMS. Repair as necessary.

         COMPONENT TESTS

         DEFOGGER RELAY TEST

         Diamante & Eclipse

         1) Remove defogger relay. See COMPONENT LOCATIONS. Ground

relay terminal No. 1, and apply battery voltage to terminal No. 3. See

Fig. 2. Check relay continuity using ohmmeter.

         2) Continuity should exist between terminals No. 2 and 5.

With voltage disconnected, continuity should not exist between

terminals No. 2 and 5. Ensure continuity exists between terminals No.

1 and 3. If continuity is not as specified, replace relay.

         Galant, Mirage & Montero Sport

         1) Remove defogger relay. See COMPONENT LOCATIONS. Ground

relay terminal No. 3, and apply battery voltage to terminal No. 1. See

Fig. 2. Check relay continuity using ohmmeter.

         2) Continuity should exist between terminals No. 2 and 5.

With voltage disconnected, continuity should not exist between

terminals No. 2and 5. Ensure continuity exists between terminals No. 1

and 3. If continuity is not as specified, replace relay.

         Montero

         1) Remove defogger relay. See COMPONENT LOCATIONS. Ground

relay terminal No. 3 and apply battery voltage to terminal No. 1. See

Fig. 3. Check relay continuity using ohmmeter.

         2) Continuity should exist between terminals No. 4 and 5.

With voltage disconnected, continuity should not exist between

terminals No. 4and 5. Ensure continuity exists between terminals No. 1

and 3. If continuity is not as specified, replace relay.

         3000GT

         1) Remove defogger relay. See COMPONENT LOCATIONS. Ground

relay terminal No. 3, and apply battery voltage to terminal No. 5. See

Fig. 4. Check relay continuity using ohmmeter.

         2) Continuity should exist between terminals No. 1 and 2.

With voltage disconnected, continuity should not exist between

terminals No. 1and 2. Ensure continuity exists between terminals No. 3

and 5. If continuity is not as specified, replace relay.

Fig. 2:  Identifying Defogger Relay Terminals (Diamante, Eclipse,

Galant, Mirage & Montero Sport)

Courtesy of Mitsubishi Motor Sales of America

Fig. 3:  Identifying Defogger Relay Terminals (Montero)

Courtesy of Mitsubishi Motor Sales of America

Fig. 4:  Identifying Defogger Relay Terminals (3000GT)

Courtesy of Mitsubishi Motor Sales of America

         DEFOGGER SWITCH TEST

NOTE:    Remove window defogger switch and disconnect switch

         connector for the following test.

         Diamante

         Rear window defogger is integral with and controlled by A/C

system ECU. To diagnose system, refer to AIR CONDITIONING & HEATING

SERVICE & REPAIR article.

         Eclipse

         Turn defogger switch to OFF position. Using ohmmeter, check

switch continuity. Continuity should be present between terminals No.

1 and 3, and terminals No. 2 and 6. Turn defogger switch to ON

position. Continuity should be present between terminals No. 1, 3 and

4, and between terminals No. 2 and 6. See Fig. 5. If continuity is not

as specified, replace switch.

         Galant

         Turn defogger switch to OFF position. Using ohmmeter, check

switch continuity. Continuity should be present between terminals No.

1 and 3. Turn defogger switch to ON position. Continuity should exist

between terminals No. 2, 4 and 6, and between terminals No. 1 and 3.

See Fig. 5. If continuity is not as specified, replace switch.

         Mirage

         Turn defogger switch to OFF position. Using ohmmeter, check

switch continuity. Continuity should be present between terminals No.

1 and 3, and terminals No. 2 and 6. Turn defogger switch to ON

position. Continuity should exist between terminals No. 1 and 3, and

terminals No. 2, 4, 5 and 6. See Fig. 5. If continuity is not as

specified, replace switch.

         Montero

         Turn defogger switch to OFF position. Using ohmmeter, check

switch continuity. Continuity should be present between terminals No.

1 and 3, and terminals No. 4 and 5. Turn defogger switch to ON

position. Continuity should exist between terminals No. 1 and 3,

terminals No. 4 and 5, and between terminals No. 2 and 6. See  Fig. 5.

If continuity is not as specified, replace switch.

         Montero Sport

         Turn defogger switch to OFF position. Using ohmmeter, check

switch continuity. Continuity should be present between terminals No.

1 and 5, and terminals No. 2 and 6. Turn defogger switch to ON

position. Continuity should be present between terminals No. 3 and 4,

terminals No. 1 and 5, and between terminals No. 2 and 6. See  Fig. 5.

If continuity is not as specified, replace switch.

         3000GT

         1) Remove defogger switch assembly from instrument cluster

bezel. With defogger switch in OFF position, check switch continuity

using ohmmeter.

         2) Continuity should exist between terminals No. 3 and 4.

With defogger switch in ON position, continuity should exist between

terminals No. 1 and 2, terminals No. 1 and 6, and between terminals

No. 3 and 4. See Fig. 6. If continuity is not as specified, replace

switch.

Fig. 5:  Identifying Defogger Switch Terminals (Eclipse, Galant,

Mirage, Montero & Montero Sport)

Courtesy of Mitsubishi Motor Sales of America

Fig. 6:  Identifying Defogger Switch Terminals (3000GT)

Courtesy of Mitsubishi Motor Sales of America

         DEFOGGER TIMER TEST

         Montero

         Remove defogger timer from interior relay block. Connect test

battery and test light to timer. See Fig. 7. Ensure test light

illuminates for about 11 seconds when battery voltage is applied to

terminal No. 3. Reapply battery voltage to terminal No. 3 and observe

test light. Test light should go off. If timer does not test as

specified, replace timer.

Fig. 7:  Identifying Defogger Timer Terminals (Montero)

Courtesy of Mitsubishi Motor Sales of America

         GRID TEST