Rotor Balance Test
Rotor Balance TestWARNING
- High-voltage in the ignition system can cause strong electrical shock which can result in serious injury. Avoid direct contact to the vehicle body during the rotor balance test.
- High-voltage spark will negatively effect the engine control. To prevent this, ground the high-tension leads and keep away from sensors and wiring harnesses.
CAUTION: If the rotor balance test is performed over a long period of time, it may cause overheating or damage to the catalytic converter. Be very careful when performing the rotor balance test.
NOTE: The purpose of the rotor balance test is to find weak or non-contributing rotors. In this test, the high-tension leads are disconnected one by one to shut off the ignition on each rotor with the engine running. By carrying out the rotor balance test, a total determination of the compression pressure, air/fuel mixture, and ignition is possible.
1. Connect the WDS or equivalent to the DLC-2.
2. Access the RPM PID.
3. Start the engine.
4. Remove high-tension lead from each rotor and monitor the RPM PID value.
5. If the RPM PID does not drop, inspect the following:
- Fuel injector (FP1)(RP1)
- Spark plugs
- High-tension leads
- Ignition coil
- Compression pressure