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 L4-2.4L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONSYMPTOM RELATED DIAGNOSTIC PROCEDURESINSPECTION PROCEDURE 32
2005 Mitsubishi Lancer L4-2.4L SOHC
Inspection Procedure 32
2005 Mitsubishi Lancer L4-2.4L SOHCSECTION Inspection Procedure 32
Ignition Switch-ST System and Transmission Range Switch System
COMMENT
- If the selector lever is moved to "P" or "N" range and the ignition switch is turned to "START" position, battery positive voltage is supplied to PCM (terminal No. 51) through the ignition switch and transmission range switch. Because of this, the PCM detects that the engine is cranking.
- The transmission range switch detects the transmission range (P, N or other ranges) and converts it to a voltage signal (high or low). Then the transmission range switch sends that signal to the PCM.
TROUBLESHOOTING HINTS (The most likely caused for this code to be set are:)
- Malfunction of the ignition switch.
- Malfunction of the transmission range switch.
- Improper connector contact, open circuit or short-circuit in the harness wire.
- PCM failed.
DIAGNOSIS
STEP 1. Check harness connector B-16 at transmission range switch for damage.
Q: Is the harness connector in good condition?
YES: Go to Step 2.
NO: Repair or replace it. Refer to Harness Connector Inspection. Then confirm that the malfunction symptom is eliminated.
STEP 2. Check the transmission range switch.
Refer to On-vehicle Service - Essential Service - Transmission range switch continuity check.
Q: Are there any abnormalities?
YES: Repair or replace it. Then confirm that the malfunction symptom is eliminated.
NO: Go to Step 3.
STEP 3. Measure the power supply voltage at transmission range switch connector B-16.
1. Disconnect the connector B-16 and measure at the harness side.
2. Turn the ignition switch to the "START" position.
3. Measure the voltage between terminal No.10 and ground.
- Voltage should be battery positive voltage.
4. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts) present?
YES: Go to Step 4.
NO: Check connector C-105 and C-123 at intermediate connector for damage and repair or replace as required. Refer to Harness Connector Inspection. If intermediate connector is in good condition, repair harness wire between ignition switch connector C-208 (terminal No.5) and transmission range switch connector B-16 (terminal No.10) because of open circuit. Then confirm that the malfunction symptom is eliminated.
STEP 4. Check connector C-136 at PCM for damage.
Q: Is the connector in good condition?
YES: Go to Step 5.
NO: Repair or replace it. Refer to Harness Connector Inspection. Then confirm that the malfunction symptom is eliminated.
STEP 5. Check for open circuit and short circuit to ground and harness damage between transmission range switch connector B-16 (terminal No.9) and PCM connector C-136 (terminal No.51).
Q: Is the harness wire in good condition?
YES: Replace the PCM. Then confirm that the malfunction symptom is eliminated.
NO: Repair it. Then confirm that the malfunction symptom is eliminated.
Ignition Switch-ST And Transmission Range Switch Circuit Part 1:
Ignition Switch-ST And Transmission Range Switch Circuit Part 2:
COMMENT
- If the selector lever is moved to "P" or "N" range and the ignition switch is turned to "START" position, battery positive voltage is supplied to PCM (terminal No. 51) through the ignition switch and transmission range switch. Because of this, the PCM detects that the engine is cranking.
- The transmission range switch detects the transmission range (P, N or other ranges) and converts it to a voltage signal (high or low). Then the transmission range switch sends that signal to the PCM.
TROUBLESHOOTING HINTS (The most likely caused for this code to be set are:)
- Malfunction of the ignition switch.
- Malfunction of the transmission range switch.
- Improper connector contact, open circuit or short-circuit in the harness wire.
- PCM failed.
DIAGNOSIS
STEP 1. Check harness connector B-16 at transmission range switch for damage.
Q: Is the harness connector in good condition?
YES: Go to Step 2.
NO: Repair or replace it. Refer to Harness Connector Inspection. Then confirm that the malfunction symptom is eliminated.
STEP 2. Check the transmission range switch.
Refer to On-vehicle Service - Essential Service - Transmission range switch continuity check.
Q: Are there any abnormalities?
YES: Repair or replace it. Then confirm that the malfunction symptom is eliminated.
NO: Go to Step 3.
STEP 3. Measure the power supply voltage at transmission range switch connector B-16.
1. Disconnect the connector B-16 and measure at the harness side.
2. Turn the ignition switch to the "START" position.
3. Measure the voltage between terminal No.10 and ground.
- Voltage should be battery positive voltage.
4. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts) present?
YES: Go to Step 4.
NO: Check connector C-105 and C-123 at intermediate connector for damage and repair or replace as required. Refer to Harness Connector Inspection. If intermediate connector is in good condition, repair harness wire between ignition switch connector C-208 (terminal No.5) and transmission range switch connector B-16 (terminal No.10) because of open circuit. Then confirm that the malfunction symptom is eliminated.
STEP 4. Check connector C-136 at PCM for damage.
Q: Is the connector in good condition?
YES: Go to Step 5.
NO: Repair or replace it. Refer to Harness Connector Inspection. Then confirm that the malfunction symptom is eliminated.
STEP 5. Check for open circuit and short circuit to ground and harness damage between transmission range switch connector B-16 (terminal No.9) and PCM connector C-136 (terminal No.51).
Q: Is the harness wire in good condition?
YES: Replace the PCM. Then confirm that the malfunction symptom is eliminated.
NO: Repair it. Then confirm that the malfunction symptom is eliminated.
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.