Description & Operation
The switch monitor test uses PIDs to check the operation of certain switches (and related circuits) that do not set codes.
- Turn ignition on. Connect the NGS scan tool. Refer to «EQUIPMENT HOOKUP»(ref-2846-S42406047222000041300000) . Using NGS scan tool, select PCM and enter PID/DATA MONITOR AND RECORD function.
- Select PIDs for switches in question. Operate switch while observing appropriate PID. If switch PID does not turn on and off when switch is operated, proceed with appropriate test. See «SWITCH MONITOR TEST MODE»(ref-2846-S20283551422000041300000) table. SWITCH MONITOR TEST MODE Switch Condition (NGS Reading) Test Vehicle Start (VST) Signal Ignition On (OFF); Ignition Start (ON) A Power Steering Pressure Switch (PSO SW) Engine Running, Steering In Neutral Position (OFF); Steering Turned (ON) FF A/C Switch (AC SW) Key On, A/C Off (OFF); A/C On (ON) KM Park/Neutral Position Signal (PNP) Key On, Gearshift Lever In "N" Or "P" Range (ON); Gearshift Lever Not In "N" & "P" Ranges (OFF) ..... A/C Relay (ACR) Engine Running, A/C Off (OFF); A/C On (ON) KM Cooling Fan Relay (Low) (LFAN) Engine Running, A/C Off (OFF); A/C On (ON) KF
Description
Parameter Identification (PID) mode allows technician to view data values (PCM inputs and outputs) in real time. Generic PIDs are OBD-II standard to all vehicles and any OBD-II scan tool can access. Ford Specific (non-generic) PIDs can be accessed using New Generation Star (NGS) scan tool.