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Home >> Ford Truck >> 2012 >> Explorer FWD L4-2.0L Turbo >> Repair and Diagnosis >> Instrument Panel, Gauges and Warning Indicators >> Testing and Inspection >> Pinpoint Tests >> Instrumentation, Message Center, and Warning Chimes >> Diagnostic Routine F

Diagnostic Routine F




Diagnostic Routine F

Diagnostic Overview

Incorrect Tachometer Indication

Normal Operation and Fault Conditions

REFER to Tachometer .

If the RPM (Revolutions Per Minute) data is missing for 5 seconds or less or if the IPC (Instrument Panel Cluster) receives invalid RPM (Revolutions Per Minute) data for 5 seconds or less, the IPC (Instrument Panel Cluster) defaults the tachometer to the last setting, based upon the last good message received.

If the IPC (Instrument Panel Cluster) does not receive the engine RPM (Revolutions Per Minute) data from the PCM (Powertrain Control Module) for 5 seconds or less, the IPC (Instrument Panel Cluster) defaults the tachometer to the last setting, based upon the last known good RPM (Revolutions Per Minute) message.

Pinpoint Test

1. RETRIEVE THE RECORDED DTCs (Diagnostic Trouble Codes) FROM THE PCM (Powertrain Control Module) KOEO (Key ON Engine OFF) SELF-TEST

1. Using a scan tool, perform the PCM (Powertrain Control Module) KOEO (Key ON Engine OFF) self-test.

Are any DTCs (Diagnostic Trouble Codes) recorded?








2. RETRIEVE THE RECORDED DTCs (Diagnostic Trouble Codes) FROM THE IPC (Instrument Panel Cluster) SELF-TEST

1. Using a scan tool, perform the IPC (Instrument Panel Cluster) self-test.

Are any DTCs (Diagnostic Trouble Codes) recorded?








3. CARRY OUT THE TACHOMETER ACTIVE COMMAND USING THE SCAN TOOL

1. Ignition ON.

2. Using a scan tool, view the IPC (Instrument Panel Cluster) PIDs (Parameter Identifications).

3. Select the IPC (Instrument Panel Cluster) tachometer (TACH_IND) PID (Parameter Identification). Command the tachometer in 10% increments while monitoring the tachometer.

Does the tachometer indication increase by 600 RPM (Revolutions Per Minute) (optional IPC (Instrument Panel Cluster) bar graph display), 700 RPM (Revolutions Per Minute) (base IPC (Instrument Panel Cluster) or IPC (Instrument Panel Cluster) analog gauge display) for each 10% increment?








4. CHECK THE PCM (Powertrain Control Module) RPM (Revolutions Per Minute) PID (Parameter Identification)

1. Using a scan tool, view the PCM (Powertrain Control Module) PIDs (Parameter Identifications).

2. Select the PCM (Powertrain Control Module) engine RPM (Revolutions Per Minute) PID (Parameter Identification) (RPM) and set the engine RPM (Revolutions Per Minute) to 1,000, 1,500, 2,000 and 2,500 RPM (Revolutions Per Minute).

3. Monitor the engine PCM (Powertrain Control Module) RPM (Revolutions Per Minute) PID (Parameter Identification) (RPM) with the engine at 1,000, 1,500, 2,000 and 2,500 RPM (Revolutions Per Minute).

Does the tachometer indication range between 944-1,056 at 1,000 RPM (Revolutions Per Minute), 1,444-1,556 RPM (Revolutions Per Minute) at 1,500 RPM (Revolutions Per Minute), 1,944-2,056 RPM (Revolutions Per Minute) at 2,000 RPM (Revolutions Per Minute) and 2,444-2,556 RPM (Revolutions Per Minute) at 2,500 RPM (Revolutions Per Minute)?







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