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HOMESERVICE MANUALSMITSUBISHI2001MONTERO XLSREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC DIAGNOSTIC PROCEDURESIGNITION CHECKSDISTRIBUTORLESS IGNITION SYSTEM (DIS) - V6POWER TRANSISTOR
2001 Mitsubishi Montero XLS

Power Transistor

2001 Mitsubishi Montero XLSSECTION Power Transistor
CAUTION: Power transistor test must be performed in less than 10 seconds to prevent coil from burning and power transistor from breaking.
  1. Disconnect power transistor 6-pin and 3-pin connectors. To test section of power transistor that controls cylinders No. 1 and 4 of ignition coil, connect negative end of 1.5-volt battery to terminal No. 4 of power transistor and positive end to terminal No. 3. See Fig 1 .
  2. Using an analog ohmmeter, check for continuity between power transistor terminals No. 4 and 13 (connect negative ohmmeter probe to terminal No. 13). Continuity should exist. With positive end of 1.5-volt battery disconnected, there should be no continuity. Replace power transistor if it fails test.
  3. To test section of power transistor that controls cylinders No. 2 and 5 of ignition coil, connect negative end of 1.5-volt battery to terminal No. 4 of power transistor and positive end to terminal No. 2.
  4. Using an analog ohmmeter, check for continuity between power transistor terminals No. 4 and 12 (connect negative ohmmeter probe to terminal No. 12). Continuity should exist. With positive end of 1.5-volt battery disconnected, there should be no continuity. Replace power transistor if it fails test.
  5. To test section of power transistor that controls cylinders No. 3 and 6 of ignition coil, connect negative end of 1.5-volt battery to terminal No. 4 of power transistor and positive end to terminal No. 1.
  6. Using an analog ohmmeter, check for continuity between terminals No. 4 and 11 of power transistor (connect negative ohmmeter probe to terminal No. 11). Continuity should exist. With positive end of 1.5-volt battery disconnected, there should be no continuity. Replace power transistor if it fails test.
Fig 1: Identifying Power Transistor Terminals (Montero & Montero Sport)
G95D31032Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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