Engine Controls - Revised DTC P1653 & PCM Message Charts

File In Section: 6E Engine Fuel & Emission

Bulletin No.: 71-65-60

Date: September, 1997

SERVICE MANUAL UPDATE

Subject:
Section 6E - Engine Controls Revised PCM Message and DTC P1653 Diagnosis

Models:
1996-98 Oldsmobile Aurora with 4.0L Engine
(VIN C - RPO L47)

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This bulletin is being issued to revise the 1996 thru 1998 Engine Control Section with the following information:

^ DTC P1653 A/C Compressor Clutch Control Circuit

Add to the 1997 Engine Controls section the following diagnostic information:

^ PCM Message Diagnosis - Low Engine Oil Level Message

This diagnostic information was not included in the service manual.