Test G: Speedometer/Tachometer Is Inoperative
NOTE:
Instrument cluster receives vehicle speed signal from Powertrain Control Module (PCM) through the Standard Corporate Protocol (SCP) bus circuit. PCM receives vehicle speed signal from output shaft sensor.
Perform dealer test mode. See DEALER TEST MODE under SELF-DIAGNOSTIC SYSTEM. If fuel gauge operated properly during "GAGE" portion of test, repair vehicle speed input from PCM (retrieve codes from PCM). See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If fuel gauge did not operated properly during "GAGE" portion of test, replace instrument cluster.