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 MANUALSMITSUBISHI2005LANCER L4-2.0L SOHCREPAIR AND DIAGNOSISTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSCONNECTOR MEASUREMENT SERVICE POINTS
2005 Mitsubishi Lancer L4-2.0L SOHC
Connector Measurement Service Points
2005 Mitsubishi Lancer L4-2.0L SOHCSECTION Connector Measurement Service Points
Turn the ignition switch to the "LOCK" (OFF) position when connecting and disconnecting the connectors. Turn the ignition switch to the "ON" position when measuring if there are no instructions to the contrary.
IF INSPECTING WITH THE CONNECTOR CONNECTED
Required Special Tool:
MD998459: Test Harness
Waterproof Connectors
Be sure to use special tool, MD998459. Never insert a test probe from the harness side, as this will reduce the waterproof performance and result in corrosion.
Ordinary (non-waterproof) Connectors
Check by inserting the multi-meter test probe from the harness side. Note that if the connector (control unit, etc.) is too small to permit insertion of the test probe, it should not be forced; use the backprobing tool for this purpose.
IF INSPECTING WITH THE CONNECTOR DISCONNECTED
- From front side of the connector
Required Special Tool:
MB991219: Inspection Harness (Included in MB991223, Harness Set)
The inspection harness for connector pin contact pressure should be used. The test probe should never be forcibly inserted, as it may cause a defective contact.
- From back side of the connector (SRS-ECU harness side connector)
Since the SRS-ECU harness connector is plated to improve conductivity, observe the warning below when checking this connector.
WARNING: Insert the backprobing tool into the connector from the harness side, and connect the tester to the backprobing tool. If any tool other than the backprobing tool is used, it may cause damage to the harness and other components. Furthermore, measurement should not be carried out by touching the backprobing tool directly against the terminals from the front of the connector. The terminals are plated to increase their conductivity, so that if they are touched directly by the backprobing tool, the plating may break, which will decrease reliability.
CAUTION: At this time, be careful not to short the connector pins with the test probes. To do so may damage the circuits inside the ECU.
Touch the pin directly with the test probe.
IF INSPECTING WITH THE CONNECTOR CONNECTED
Required Special Tool:
MD998459: Test Harness
Waterproof Connectors
Be sure to use special tool, MD998459. Never insert a test probe from the harness side, as this will reduce the waterproof performance and result in corrosion.
Ordinary (non-waterproof) Connectors
Check by inserting the multi-meter test probe from the harness side. Note that if the connector (control unit, etc.) is too small to permit insertion of the test probe, it should not be forced; use the backprobing tool for this purpose.
IF INSPECTING WITH THE CONNECTOR DISCONNECTED
- From front side of the connector
Required Special Tool:
MB991219: Inspection Harness (Included in MB991223, Harness Set)
The inspection harness for connector pin contact pressure should be used. The test probe should never be forcibly inserted, as it may cause a defective contact.
- From back side of the connector (SRS-ECU harness side connector)
Since the SRS-ECU harness connector is plated to improve conductivity, observe the warning below when checking this connector.
WARNING: Insert the backprobing tool into the connector from the harness side, and connect the tester to the backprobing tool. If any tool other than the backprobing tool is used, it may cause damage to the harness and other components. Furthermore, measurement should not be carried out by touching the backprobing tool directly against the terminals from the front of the connector. The terminals are plated to increase their conductivity, so that if they are touched directly by the backprobing tool, the plating may break, which will decrease reliability.
CAUTION: At this time, be careful not to short the connector pins with the test probes. To do so may damage the circuits inside the ECU.
Touch the pin directly with the test probe.
RENDER: 1.0x
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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.