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Diagnostic Aids

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Perform this circuit test when directed by other CIRCUIT TESTS. This test is only intended to diagnose:

1)  Check For Codes 121, 123 & 122

Disconnect cruise control servo wiring harness connector (if equipped). Perform KOEO SELF-TEST. If Code 121, 123 or 122 is present, go to appropriate CIRCUIT TEST. See DIAGNOSTIC TROUBLE CODE REFERENCE CHART. If Code 111 (pass code) is displayed, go to next step. If no code is displayed, go to CIRCUIT TEST QA.

2)  Check Throttle Linkage

Check throttle and linkage for sticking and binding. If throttle and linkage are okay, replace Throttle Position (TP) sensor and repeat QUICK TEST. If throttle and linkage are binding, repair as necessary and repeat QUICK TEST.