Operation CHARM: Car repair manuals for everyone.

Preparation

1. Check and correct as necessary, the engine coolant, engine oil, and ATF levels before testing.
2. Warm up the engine thoroughly to raise the ATF temperature to operating level 60 - 70°C (140 - 158°F).
3. Engage the parking brake and use wheel chocks at the front and rear of the wheels.
4. Connect a tachometer to the engine.