Test A: No Communication With Front Electronic Module
WARNING: This page is about a different car, the 2001 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Ignition switch must be cycled from LOCK to RUN position to enable Switched System Power (SSP) feature. Always enable SSP feature before proceeding with test procedures.
- Turn ignition switch to LOCK position. Disconnect Front Electronic Module (FEM) 12-pin harness connector C201c. Disconnect FEM 20-pin harness connector C201f. FEM is located behind driver's side kick panel. See Fig 1 . Turn ignition switch to RUN position. Measure voltage between ground and FEM harness connector C201c terminal No. 6 (Orange/Green wire). Measure voltage between ground and FEM harness connector C201f terminal No. 1 (Orange/Yellow wire). See Fig 2 . If battery voltage exists at both terminals, go to next step. If battery voltage does not exist at either terminal, repair power distribution circuit as necessary. See POWER DISTRIBUTION article in WIRING DIAGRAMS. Clear DTCs. Retest system operation.
- Turn ignition switch to LOCK position. Disconnect FEM 17-pin harness connector C201a. Measure resistance between ground and appropriate FEM harness connector terminals. See FRONT ELECTRONIC MODULE TERMINAL IDENTIFICATION
table. See Fig 2
. If all resistances are less than 5 ohms, repair module communications concern. See MODULE COMMUNICATIONS NETWORK - LS article. If any resistance is 5 ohms or more, repair open in appropriate wire between ground and FEM. See GROUND DISTRIBUTION article in WIRING DIAGRAMS.FRONT ELECTRONIC MODULE TERMINAL IDENTIFICATION
Connector Terminal No. Wire Color C201a 11 Black/Red C201a 13 Black/Red C201a 14 Black/Red C201a 15 Black/Red C201c 12 Black/Red