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 MANUALSACURA1999NSX V6-3.2L DOHC (VTEC)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTECHNICAL SERVICE BULLETINSCOMPUTERS/CONTROLS - VEHICLE TEST DRIVE PRECAUTIONS
1999 Acura NSX V6-3.2L DOHC (VTEC)
Computers/Controls - Vehicle Test Drive Precautions
1999 Acura NSX V6-3.2L DOHC (VTEC)SECTION Computers/Controls - Vehicle Test Drive Precautions
Don't Test-Drive With MIL On or D Indicator Blinking
NOTE:
This article applies to '01-03 3 2CLs, '01-06 MDXs, '99-04 3.5RLs, '05-06 RLs, '02-06 RSXs, '99-03 3.2TLs, '04-06 TLs, and '04-06 TSXs.
When the PCM detects a problem that turns on the MIL, starts the D indicator blinking, or both, it can revert to a backup mode or "limp home" mode. This mode differs depending on the A/T design, the cause of the malfunction or DTC, or both. When you test-drive a vehicle, make sure you first clear all A/T DTCs. You can't evaluate the A/T if the MIL is on, the D indicator is blinking, or both are on.
In backup mode, some A/Ts let you manually shift while others let you shift only to certain gears that apply to its particular backup mode. Here are some common symptoms you get in backup mode:
^ Harsh upshifting and downshifting
^ Vehicle starts in 2nd gear and then shifts to 4th gear
^ Vehicle starts in 2nd gear and then shifts to 3rd gear
When an A/T is in backup mode, service clients commonly complain about low power or lousy acceleration because the vehicle starts in 2nd or 4th gear.
NOTE:
This article applies to '01-03 3 2CLs, '01-06 MDXs, '99-04 3.5RLs, '05-06 RLs, '02-06 RSXs, '99-03 3.2TLs, '04-06 TLs, and '04-06 TSXs.
When the PCM detects a problem that turns on the MIL, starts the D indicator blinking, or both, it can revert to a backup mode or "limp home" mode. This mode differs depending on the A/T design, the cause of the malfunction or DTC, or both. When you test-drive a vehicle, make sure you first clear all A/T DTCs. You can't evaluate the A/T if the MIL is on, the D indicator is blinking, or both are on.
In backup mode, some A/Ts let you manually shift while others let you shift only to certain gears that apply to its particular backup mode. Here are some common symptoms you get in backup mode:
^ Harsh upshifting and downshifting
^ Vehicle starts in 2nd gear and then shifts to 4th gear
^ Vehicle starts in 2nd gear and then shifts to 3rd gear
When an A/T is in backup mode, service clients commonly complain about low power or lousy acceleration because the vehicle starts in 2nd or 4th gear.
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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.