Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Not Using J 42958 Cruise Control Tester

DIAGNOSTIC AIDS
To avoid misdiagnosis:
^ Inspect for proper operation of the brake lamps.
^ Inspect throttle linkage for mechanical binding which could cause the system to malfunction.
^ Inspect cruise control cable for adjustment, should have minimum slack.
^ Inspect for stored Diagnostic Trouble Codes (DTCs) in the PCM.
^ 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 (fuel cut-off).

TEST

Steps 1-10:




Steps 11-24:




Steps 25-38:




Steps 39-43: