Diagnostic Aids

WARNING: This page is about a different car, the 1994 Mercury Grand Marquis, 1994 Lincoln Town Car, 1994 Lincoln Mark VIII, and 1994 Ford Crown Victoria. 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.

1) Check For Codes 23, 53, 63, 121, 122 & 123 Disconnect the cruise control servo wiring harness connector (if equipped). Perform KOEO SELF-TEST. If Code 23, 53, 63, 121, 122 or 123 is present, perform appropriate CIRCUIT TEST. Refer to the DIAGNOSTIC CODE-TO-TEST REFERENCE MENUS , and diagnostic codes as necessary. 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.