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 MANUALSMITSUBISHI2004DIAMANTE V6-3.5L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSCRANKSHAFT POSITION SENSORTESTING AND INSPECTION
2004 Mitsubishi Diamante V6-3.5L SOHC
Crankshaft Position Sensor: Testing and Inspection
2004 Mitsubishi Diamante V6-3.5L SOHCSECTION Testing and Inspection
CAMSHAFT POSITION SENSOR AND CRANKSHAFT POSITION SENSOR
Measurement Method
1. Disconnect the distributor (camshaft position sensor) connector and connect the special tool (test harness: MB991348) in between. (All terminals should be connected.)
2. Connect the analyzer special patterns pickup to distributor connector terminal 5.
3. Disconnect the crankshaft position sensor connector and connect the special tool (test harness: MD998478) in between.
4. Connect the analyzer special patterns pickup to crankshaft position sensor connector terminal 2.
Alternate method (Test harness not available)
1. Connect the analyzer special patterns pickup to PCM terminal 56. (When checking the camshaft position sensor signal wave pattern)
2. Connect the analyzer special patterns pickup to PCM terminal 45. (When checking the crankshaft position sensor signal wave pattern)
Examples of Abnormal Wave Patterns
- Example 1
CAUSE OF PROBLEM
Sensor interface malfunction
WAVE PATTERN CHARACTERISTICS
Rectangular wave pattern is output even when the engine is not started.
- Example 2
CAUSE OF PROBLEM
Loose timing belt
Abnormality in sensor disk
WAVE PATTERN CHARACTERISTICS
Wave pattern jumps to the left or right.
Measurement Method
1. Disconnect the distributor (camshaft position sensor) connector and connect the special tool (test harness: MB991348) in between. (All terminals should be connected.)
2. Connect the analyzer special patterns pickup to distributor connector terminal 5.
3. Disconnect the crankshaft position sensor connector and connect the special tool (test harness: MD998478) in between.
4. Connect the analyzer special patterns pickup to crankshaft position sensor connector terminal 2.
Alternate method (Test harness not available)
1. Connect the analyzer special patterns pickup to PCM terminal 56. (When checking the camshaft position sensor signal wave pattern)
2. Connect the analyzer special patterns pickup to PCM terminal 45. (When checking the crankshaft position sensor signal wave pattern)
Examples of Abnormal Wave Patterns
- Example 1
CAUSE OF PROBLEM
Sensor interface malfunction
WAVE PATTERN CHARACTERISTICS
Rectangular wave pattern is output even when the engine is not started.
- Example 2
CAUSE OF PROBLEM
Loose timing belt
Abnormality in sensor disk
WAVE PATTERN CHARACTERISTICS
Wave pattern jumps to the left or right.
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.