Not Using J 42958 Cruise Control Tester

Diagnostic Chart (Part 1 Of 3):

Diagnostic Chart (Part 2 Of 3):

Diagnostic Chart (Part 3 Of 3):

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.
^ EMI on the speed sensor signal circuit may cause erratic cruise control operation.

CONDITIONS FOR ENABLING CRUISE CONTROL
The vehicle speed is greater than 40 km/h (25 mph).