Using Hybrid Electronic Cluster
Turn ignition switch to LOCK position. To enter HEC self-diagnostics, press and hold instrument cluster SELECT/RESET button. Turn ignition switch to RUN position. Within 5-8 seconds, odometer will display "tESt" to begin self-diagnostic mode. SELECT/RESET button MUST be released within 3 seconds of odometer displaying "tESt". Repeatedly press SELECT/RESET button through odometer displays until "dtc" is displayed. When odometer displays "dtc", press SELECT/RESET button again and any continuous DTCs will be displayed before odometer advances to next display. For other HEC diagnostic modes, see INSTRUMENT PANELS - ANALOG - F150 PICKUP - GASOLINE .
If DTC is retrieved, see HYBRID ELECTRONIC CLUSTER DIAGNOSTIC TROUBLE CODE TEST INDEX table. If no DTCs related to the concern are retrieved, repair by symptom. See SYMPTOM INDEX table under SYSTEM TESTS. For DTCs not covered in this article, see MODULE COMMUNICATIONS NETWORK - F150 PICKUP article. Turn ignition switch to LOCK position or press and hold SELECT/RESET button for 3 or more seconds, release to exit HEC dealer test mode.