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 MANUALSACURA1998NSX V6-3.2L DOHC (VTEC)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSTECHNICAL SERVICE BULLETINSBY SYMPTOMCAMPAIGN - ENGINE CONTROL MODULE REPLACEMENT
1998 Acura NSX V6-3.2L DOHC (VTEC)
Campaign - Engine Control Module Replacement
1998 Acura NSX V6-3.2L DOHC (VTEC)SECTION Campaign - Engine Control Module Replacement
October 19, 1998
BULLETIN NO.
93-026
YEAR
1998
MODEL
NSX
VIN APPLICATION
thru VIN JH4NA....WT000239
Product Update: NSX Engine Control Module
BACKGROUND
When the engine speed is above 5,000 rpm, the engine and vehicle may slow more rapidly than expected if the accelerator pedal is released.
CUSTOMER NOTIFICATION
All owners of affected vehicles will be mailed a notification of this campaign. An example of the customer letter is in this service bulletin.
CORRECTIVE ACTION
Replace the engine control module (ECM).
PARTS INFORMATION
Engine Control Module (manual transmission):
P/N 37820-PBY-A04RM
Engine Control Module (automatic transmission):
P/N 37820-PR7-A47RM
WARRANTY CLAIM INFORMATION
REPAIR PROCEDURE
1. Move the passenger's seat as far forward as it will go. Tilt the seat-back forward.
2. Remove the rear upper trim panel (3 clips).
3. Remove the right rear trim panel (4 clips).
4. Remove two mounting screws from the rear center trim panel, and three mounting screws from the rear side trim panel.
5. Disconnect the six connectors from the ECM.
6. Remove the four ECM mounting bolts. Remove the ECM.
7. Install the new ECM. Reconnect the six connectors.
8. Reinstall the interior panels.
9. Move the passenger's seat to its normal position.
10. Connect the PGM Tester. Enter the VIN.
11 Select the Immobilizer menu (# 5).
12. Select the Rewrite option (# 3).
13. Select the ECM (# 2).
14. Enter the PGM Tester password.
15. Press Enter to rewrite the immobilizer code in the ECM.
16. Disconnect the PGM Tester.
17. Turn the ignition switch ON. The immobilizer indicator should come on for two seconds, then go out.
18. Center-punch a completion mark above the second character (H) of the engine compartment VIN.
Disclaimer
BULLETIN NO.
93-026
YEAR
1998
MODEL
NSX
VIN APPLICATION
thru VIN JH4NA....WT000239
Product Update: NSX Engine Control Module
BACKGROUND
When the engine speed is above 5,000 rpm, the engine and vehicle may slow more rapidly than expected if the accelerator pedal is released.
CUSTOMER NOTIFICATION
All owners of affected vehicles will be mailed a notification of this campaign. An example of the customer letter is in this service bulletin.
CORRECTIVE ACTION
Replace the engine control module (ECM).
PARTS INFORMATION
Engine Control Module (manual transmission):
P/N 37820-PBY-A04RM
Engine Control Module (automatic transmission):
P/N 37820-PR7-A47RM
WARRANTY CLAIM INFORMATION
REPAIR PROCEDURE
1. Move the passenger's seat as far forward as it will go. Tilt the seat-back forward.
2. Remove the rear upper trim panel (3 clips).
3. Remove the right rear trim panel (4 clips).
4. Remove two mounting screws from the rear center trim panel, and three mounting screws from the rear side trim panel.
5. Disconnect the six connectors from the ECM.
6. Remove the four ECM mounting bolts. Remove the ECM.
7. Install the new ECM. Reconnect the six connectors.
8. Reinstall the interior panels.
9. Move the passenger's seat to its normal position.
10. Connect the PGM Tester. Enter the VIN.
11 Select the Immobilizer menu (# 5).
12. Select the Rewrite option (# 3).
13. Select the ECM (# 2).
14. Enter the PGM Tester password.
15. Press Enter to rewrite the immobilizer code in the ECM.
16. Disconnect the PGM Tester.
17. Turn the ignition switch ON. The immobilizer indicator should come on for two seconds, then go out.
18. Center-punch a completion mark above the second character (H) of the engine compartment VIN.
Disclaimer
RENDER: 1.0x
NO RELATED
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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.