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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSMITSUBISHI2005LANCER L4-2.4L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSCRANKSHAFT POSITION SENSORTESTING AND INSPECTION
2005 Mitsubishi Lancer L4-2.4L SOHC
Crankshaft Position Sensor: Testing and Inspection
2005 Mitsubishi Lancer L4-2.4L SOHCSECTION Testing and Inspection
CAMSHAFT POSITION SENSOR AND CRANKSHAFT POSITION SENSOR
Required Special Tools:
- MB991709: Test Harness
- MB991658: Test Harness
Measurement Method
1. Disconnect the camshaft position sensor connector and connect the test harness special tool (MB991709) between the separated connector. (All terminals should be connected.)
2. Connect the oscilloscope probe to camshaft position sensor connector terminal No.2.
3. Disconnect the crankshaft position sensor intermediate connector and connect the test harness special tool (MB991658) between the separated connector.
4. Connect the oscilloscope probe to crankshaft position sensor connector terminal No.2 (black clip of special tool).
Alternate method (Test harness not available)
1. Connect the oscilloscope probe to ECM or PCM terminal 71. (Check the camshaft position sensor signal wave pattern.)
2. Connect the oscilloscope probe to ECM or PCM terminal 70. (Check the crankshaft position sensor signal wave pattern.)
Standard Wave Pattern
Wave Pattern Observation Points
Check that cycle time T becomes shorter when the engine speed increased.
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 disc.
- Wave pattern characteristics
Wave pattern is displaced to the left or right.
Required Special Tools:
- MB991709: Test Harness
- MB991658: Test Harness
Measurement Method
1. Disconnect the camshaft position sensor connector and connect the test harness special tool (MB991709) between the separated connector. (All terminals should be connected.)
2. Connect the oscilloscope probe to camshaft position sensor connector terminal No.2.
3. Disconnect the crankshaft position sensor intermediate connector and connect the test harness special tool (MB991658) between the separated connector.
4. Connect the oscilloscope probe to crankshaft position sensor connector terminal No.2 (black clip of special tool).
Alternate method (Test harness not available)
1. Connect the oscilloscope probe to ECM
2. Connect the oscilloscope probe to ECM
Standard Wave Pattern
Wave Pattern Observation Points
Check that cycle time T becomes shorter when the engine speed increased.
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 disc.
- Wave pattern characteristics
Wave pattern is displaced to the left or right.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.