PINPOINT TEST QA: Unable To Activate Self-Test/Network Communication Error: Introduction
WARNING: This page does not describe the selected car, but rather 34 other vehicles, including the 2019 Lincoln Navigator, 2019 Lincoln Nautilus, 2019 Lincoln MKZ, 2019 Lincoln MKT, and 2019 Lincoln MKC. However, it is still accessible from the selected car via links, so may be relevant.
This pinpoint test is intended to diagnose the following:
- unable to communicate with the PCM
- unable to activate the PCM self-test
- incorrect self-test procedure
- harness circuits: ISP-R, PCMRC, PWRGND and VPWR
Harness Side
| Circuit | Pin |
|---|---|
| ETCREF (Electronic Throttle Control Reference Voltage) | 5 |
| ETCRTN (Electronic Throttle Control Return) | 4 |
Harness Side
| Circuit | Pin |
|---|---|
| VPWR (Vehicle Power) | B101 |
| ISP-R (Ignition Switch Position Run) | B64 |
| PCMRC (PCM Relay Control) | B25 |
| VPWR (Vehicle Power) | B102 |
| VPWR (Vehicle Power) | B100 |
| PWRGND (Power Ground) | B99 |
| PWRGND (Power Ground) | B98 |
| PWRGND (Power Ground) | B97 |
| PWRGND (Power Ground) | B96 |