Tachometer - Fluctuates and/or Bounces: Overview

NO: 08-04-98

GROUP: Electrical

DATE: Jan. 30, 1998

SUBJECT:
Tachometer Fluctuates And/Or Bounces

MODELS:
1997-1998 (PL) Neon

THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A TACHOMETER, BUILT PRIOR TO DECEMBER 12, 1997 (MDH 1212XX).

SYMPTOM/CONDITION:
Tachometer fluctuates and/or bounces as much as 300 to 1000 RPM while driving at a steady speed/RPM.

DIAGNOSIS:
Using the Mopar Diagnostic System (MDS) or the Diagnostic Scan Tool (DRB Ill) with the appropriate Diagnostic Procedures Manual, verify all engine/transmission systems are functioning as designed. If Diagnostic Trouble Codes (DTC's) are present, record them on the repair order and repair as necessary before proceeding further with this bulletin. Using an ohmmeter, check the resistance between the PCM case and the battery ground. If the resistance is less than 1 ohm, refer to the appropriate Powertrain Diagnostic Manual for further tachometer diagnostics. If the resistance is more than 1 ohm, perform the Repair Procedure.

POLICY: Reimbursable within the provisions of the warranty.

TIME ALLOWANCE:
Labor Operation No: 08-19-01-98 0.3 Hrs.

FAILURE CODE: XX - Service Adjustment