Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMITSUBISHI2004GALANT V6-3.8L (6G75)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULEDIAGRAMS
2004 Mitsubishi Galant V6-3.8L (6G75)
Engine Control Module: Diagrams
2004 Mitsubishi Galant V6-3.8L (6G75)SECTION Diagrams
CHECK AT THE POWERTRAIN CONTROL MODULE (PCM)
1. Disconnect the PCM connectors B-19, B-20, B-21, B-22 and B-23, and connect check harness special tool MB991923 between the PCM connectors.
2. Measure the voltage between each check harness connector terminal and check harness connector ground terminal (No. 25 or No. 29).
TERMINAL VOLTAGE CHECK CHART
NOTE: *1: The average voltage through an analog voltmeter is described (because the average voltage is too stable to be shown on a digital voltmeter).
NOTE: Vehicles for Canada, the headlight, taillight, etc remain lit even when the lighting switch is in "OFF" position but is no problem for checks.
1. Disconnect the PCM connectors B-19, B-20, B-21, B-22 and B-23, and connect check harness special tool MB991923 between the PCM connectors.
2. Measure the voltage between each check harness connector terminal and check harness connector ground terminal (No. 25 or No. 29).
Check Harness Special Tool MB991923 Connector Terminal Arrangement Part 1:
Check Harness Special Tool MB991923 Connector Terminal Arrangement Part 2:
Check Harness Special Tool MB991923 Connector Terminal Arrangement Part 3:
Check Harness Special Tool MB991923 Connector Terminal Arrangement Part 4:
Check Harness Special Tool MB991923 Connector Terminal Arrangement Part 5:
Check Harness Special Tool MB991923 Connector Terminal Arrangement Part 6:
TERMINAL VOLTAGE CHECK CHART
NOTE: *1: The average voltage through an analog voltmeter is described (because the average voltage is too stable to be shown on a digital voltmeter).
NOTE: Vehicles for Canada, the headlight, taillight, etc remain lit even when the lighting switch is in "OFF" position but is no problem for checks.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.