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TSB Revision DIAGNOSTIC TROUBLE CODE PROCEDURES 13Ac-537 STEP 8. Using scan tool MB991502, read the diagnostic YES : Retry the troubleshooting. P0642 Throttle Position Sensor Power Supply . TECHNICAL DESCRIPTION • PCM checks the TPS power voltage for abnormal conditions. . DTC SET CONDITIONS Check Conditions • Battery positive voltage is higher than 6.3 volts. Judgement Criteria • TPS power voltage should be 4.1 volts or less for 0.5 seconds. . TROUBLESHOOTING HINTS (The most likely • PCM failed. DIAGNOSIS Required Special Tool: • MB991502: Scan Tool (MUT-II) STEP 1. Using scan tool MB991502, read the diagnostic CAUTION To prevent damage to scan tool MB991502, always turn the YES : Replace the PCM. Refer to GROUP 00, How to Use Troubleshooting/ ACX01539 16-PIN MB991502 AC ACX01539 16-PIN MB991502 AC |