Engine Controls - System & Component Testing: Introduction
CAUTION:
On Accord and Prelude models, when substituting a known-good PCM, immobilizer code must be rewritten to replacement PCM using Honda PGM tester, or engine will not start.
NOTE:
For testing and diagnosis of Variable Valve Timing (VTEC) system, see DTC P1253 or DTC P1259 in TESTS W/CODES - INTRODUCTION
article.
Before testing separate components or systems, perform procedures in BASIC TESTING article. Since many computer-controlled and monitored components set Diagnostic Trouble Code (DTC) if they malfunction, also perform procedures in TESTS W/CODES - INTRODUCTION article.
NOTE:
Before disconnecting battery, obtain anti-theft code for radio. After battery is reconnected, CODE will appear on radio display. Enter 5-digit anti-theft code using select buttons and radio will begin working. If code is entered wrong 3 times, leave radio on at least one hour and enter code correctly. Any time radio power is lost, pre-selected radio stations will have to be set. For more information, see owners manual.
NOTE:
Perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test procedure. Testing individual components does not isolate shorts or opens. Use ohmmeter to isolate wiring harness shorts or opens.