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.
Load compensation inspection
- Start the engine and let it idle.
- Connect the M-MDS to the DLC-2.
- Select the RPM PID.NOTE:
- Excludes temporary idle speed drop just after the loads are turned on.
- Verify that the engine speed is within specification under each load condition.
- If the load condition is not as specified, inspect the following:
- A/C switch and related wiring harness system (A/C request signal is always on or off) (See NO. 23 A/C DOES NOT WORK SUFFICIENTLY .) (See NO. 24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY .)
- Electrical load
- Charging system (See BATTERY INSPECTION .) (See GENERATOR INSPECTION .)
Idle-up speed [Convertible top] (MT: Neutral position, AT: P position or N position)
No load: 660-760 RPM (MT), 670-770 RPM (AT)
A/C on: 720-870 RPM (MT), 700-800 RPM (AT)
Electrical loads on: 680-780 RPM (MT), 690-790 RPM (AT)
Idle-up speed [Retractable hardtop] (MT: Neutral position, AT: P position or N position)
No load: 700-800 RPM (MT), 720-820 RPM (AT)
A/C on: 720-870 RPM (MT), 720-820 RPM (AT)
Electrical loads on: 700-800 RPM (MT), 720-820 RPM (AT)
Use the Manual With the Right Hardware
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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.