Cruise Control - Inoperative/Malfunctioning
DIAGNOSTIC AIDSIMPORTANT: Perform the following in order to avoid misdiagnosis:
^ Inspect for proper adjustment of the brake switches.
^ Inspect for proper operation of brake lamps.
^ Inspect throttle linkage for mechanical binding which could cause the system to malfunction.
^ Inspect cruise control cable adjustment, should have minimum slack.
^ Inspect for stored Diagnostic Trouble Codes (DTCs) in the PCM. Refer to Diagnostic System Check - Computers and Controls Systems in Computers and Controls Systems - 3.8 L. Initial Inspection and Diagnostic Overview
^ EMI on the speed sensor signal circuit may cause erratic cruise control operation.
CONDITIONS FOR ENABLING CRUISE CONTROL
^ When vehicle speed is more than 40 km/h (25 mph).
^ When PARK, REVERSE NEUTRAL, or 1st gear is not indicated.
^ When an over/undercharged battery condition does not exist.
^ With normal engine RPM.
^ Without high engine RPM. e.g. fuel cut-off.
TEST
Steps 1-8:
Steps 9-22:
Steps 23-34:
Steps 35-43:
