PINPOINT TEST QE: Electronic Throttle Control (ETC) System: Introduction
WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2008 Mercury Sable, 2008 Mercury Mountaineer, 2008 Mercury Milan, 2008 Mercury Mariner, and 2008 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Diagnose and repair the following DTCs throughDIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS
and the Workshop article respectively before entering this pinpoint test:
- P0715
- P0720
- P0731-P0735
- P0102-P0104
- P0321
- C1165
- U1027
This pinpoint test is intended to diagnose the informational powertrain control module (PCM) diagnostic trouble codes (DTCs).
The informational DTCs are the result of limited operating strategy (LOS) or failure mode effects management (FMEM) operating strategy that maintains limited vehicle function in the event of a PCM, harness, or component concern.
Circuit DTCs can be accompanied by the informational DTCs, and should be diagnosed first. Informational DTCs without circuit DTCs may or may not indicate the actual concern and should be diagnosed as a symptom.
| Pin | Circuit |
|---|---|
| 6 | SIGRTN (Signal Return) |
| 2 | VREF (Reference Voltage) |