Section 4 TM   9-2320-363-20-1 E. CODE 6X (X=1 to 6) - INJECTOR RESPONSE TIME TOO LONG (Cent’d.) STEP/SEQUENCE 6X-1 6 Check for Good Ground Line l Read resistance between socket C of the 6-way power harness connector and a good ground. l Also read resistance between socket D of the 6-way power harness connector and a good ground. 6X-1 7 Check Return Line l Disconnect both 5-way injector harness  connectors  at  the  ECM. l Read resistance between   sockets G and L of the 5-way injector harness   connector. l Also read resistance between sockets A and E of the other 5-way, injector harness connector. 6X-30 Verify Repairs l Turn ignition off. l Reconnect  all  connectors. l Turn ignition on. . Clear codes. l Note status of “Check Engine” light. l If "Check Engine” light does not stay on, start engine and run for 1 minute or until “Check Engine” light comes on. Stop engine. l Read historical codes. RESULT I WHAT TO DO NEXT Both  readings ^I-Go  to  6X-17. are less than or equal to 5 ohms. Either  reading -Ground line (ckt #150) is open. is greater than Contact Direct Support. 5 ohms. Either  reading - Injector Driver Return line is greater than 5 ohms. (ckt #619 or #620) is  open. Contact  Direct  Support. Both  readings -GO to 6X-10. are less than or equal to 5 ohms. Code 25 (no codes). ^A-Repairs  are  complete. Code 6X (and -All  system  diagnostics  are any other codes). complete. Please review this section from the first step to find the  error. Any  other  codes -Go to START-1, page 3-121, to except Code 6X. service other codes. 3-329