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.
Diagnosis Procedure
- CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I
- Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
- Check the voltage between ECM harness connector and ground.
ECM Ground Voltage Connector Terminal E16 105 Ground Battery voltage Is the inspection result normal?
YES >> GO TO 2.
NO >> Go to "Diagnosis Procedure ".
- CHECK IGNITION COIL POWER SUPPLY CIRCUIT-II
- Turn ignition switch OFF.
- Disconnect Condenser harness connector.
- Turn ignition switch ON.
- Check the voltage between condenser harness connector and ground.
Condenser Ground Voltage Connector Terminal F13 1 Ground Battery voltage Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 3.
- CHECK IGNITION COIL POWER SUPPLY CIRCUIT-III
- Turn ignition switch OFF.
- Disconnect IPDM E/R harness connector E43.
- Check the continuity between IPDM E/R harness connector and condenser harness connector.
IPDM E/R Condenser Continuity Connector Terminal Connector Terminal E14 44 F13 1 Existed - Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> Go to "Diagnosis Procedure ".
NO >> GO TO 4.
- DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E8, F1
- IPDM E/R harness connector E43
- Harness for open or short between IPDM E/R and condenser
>> Repair open circuit or short to ground or short to power in harness or connectors.
- CHECK CONDENSER GROUND CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Check the continuity between Condenser harness connector and ground.
Condenser Ground Continuity Connector Terminal F13 2 Ground Existed - Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
- CHECK CONDENSER
Refer to "Component Inspection (Condenser) ".
Is the inspection result normal?
YES >> GO TO 7.
NO >> Replace condenser.
- CHECK IGNITION COIL POWER SUPPLY CIRCUIT-V
- Reconnect all harness connectors disconnected.
- Disconnect ignition coil harness connector.
- Turn ignition switch ON.
- Check the voltage between ignition coil harness connector and ground.
Ignition coil Ground Voltage Cylinder Connector Terminal 1 F33 3 Ground Battery voltage 2 F34 3 3 F35 3 4 F36 3 Is the inspection result normal?
YES >> GO TO 8.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
- CHECK IGNITION COIL GROUND CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Check the continuity between ignition coil harness connector and ground.
Ignition coil Ground Continuity Cylinder Connector Terminal 1 F33 2 Ground Existed 2 F34 2 3 F35 2 4 F36 2 - Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 9.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
- CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- Disconnect ECM harness connector.
- Check the continuity between ECM harness connector and ignition coil harness connector.
Ignition coil ECM Continuity Cylinder Connector Terminal Connector Terminal 1 F33 1 F7 17 Existed 2 F34 1 18 3 F35 1 22 4 F36 1 21 - Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 10.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
- CHECK IGNITION COIL WITH POWER TRANSISTOR
Refer to "Component Inspection (Ignition Coil with Power Transistor) ".
Is the inspection result normal?
YES >> GO TO 11.
NO >> Replace malfunctioning ignition coil with power transistor. Refer to "EXPLODED VIEW ".
- CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".
>> INSPECTION END
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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.