Test A: No Communication With Gem Module
- Ensure ignition switch is off. Connect NGS tester to Data Link Connector (DLC). Using NGS tester, read IGN_GEM PID while rotating ignition switch through all positions. If PID values agree with ignition switch positions, go to next step. If PID values do not agree with ignition switch positions, repair suspect open circuit between ignition switch and instrument panel fuse block. See WIRING DIAGRAMS . Clear DTCs and retest system.
- Disconnect instrument panel fuse/relay block Black connector C243. Measure voltage between ground and connector C243 terminal No. 11 (Tan/Black wire). See Fig 1. If voltage is more than 10 volts, go to next step. If voltage is less than 10 volts, repair Tan/Black wire circuit. Clear DTCs and retest system.
Courtesy of FORD MOTOR CO.
- Turn ignition switch to OFF position. Disconnect fuse/relay block connector C267. Reconnect C243 connector. Turn ignition on. Measure voltage between ground and connector C267 terminal No. 4. Measure voltage between ground and connector C267 terminal No. 16. See Fig 1. If voltages are more than 10 volts, go to next step. If voltages are less than 10 volts, replace fuse/relay block. Clear DTCs and retest system.
- Turn ignition switch to OFF position. Disconnect Gray GEM connector C239. Measure resistance between ground and connector C239 terminal No. 26 (Black/Light Blue wire). See Fig 2. If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, repair open in Black/Light Blue wire circuit. Clear DTCs and retest system.
Courtesy of FORD MOTOR CO.
- Measure resistance between ground and connector C239 terminal No. 14 (Black/Light Blue wire). See Fig 2. If resistance is less than 5 ohms, problem is in Module Communications network. See MODULE COMMUNICATIONS NETWORK article. If resistance is more than 5 ohms, repair open in Black/Light Blue wire circuit. Clear DTCs and retest system.