Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2003 Mercury Sable, 2003 Mercury Mountaineer, 2003 Mercury Marauder, 2003 Mercury Grand Marquis, and 2003 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.

Perform this test only when directed here. This system test is intended to diagnose the following:

ETC Throttle Position (TP) sensor.
ETC throttle body control motor.
ETC throttle body assembly.
Harness Circuits: TP1, TP2, ETCREF, ETCRTN.
Powertrain Control Module (PCM).

Fig 1: Identifying ETC Motor Circuits & Connector Terminals

Courtesy of FORD MOTOR CO.

For TP sensor circuit and connector terminals, see Fig 2 .

Fig 2: Identifying TP Sensor Circuit & Connector Terminals - LS & Thunderbird

Courtesy of FORD MOTOR CO.