Diagnostic Aids

WARNING: This page is about a different car, the 1995 Lincoln Mark VIII. However, it is still accessible from the selected car via links, so may be relevant.

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

Throttle plate linkage.
Test conditions.

Check For Codes 121, 122 & 123

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

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 or linkage is binding, repair as necessary and repeat QUICK TEST .