Not Using J 42958 Cruise Control Tester

DIAGNOSTIC AIDS

IMPORTANT: Perform the following in order to avoid misdiagnosis.

^ 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. 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 by the Park Neutral Position Switch.
^ When an over/undercharged battery condition does not exist.
^ With normal engine RPM.
^ Without high engine RPM e.g. fuel cut off.

TEST

Cruise Control Inoperative/Malfunctioning - Steps 1-8:

Cruise Control Inoperative/Malfunctioning - Steps 9-21:

Cruise Control Inoperative/Malfunctioning - Steps 22-32:

Cruise Control Inoperative/Malfunctioning - Steps 33-43: