How is the EGRVR circuit tested for a short to power (HE113)?

With the breakout box installed and PCM disconnected, turn the key on with the engine off and measure voltage between PCM Test Pin 47 and ground, then key off. If voltage was less than 1.0 volt, go to HE114; otherwise repair the short circuit, restore the vehicle, and rerun the Quick Test.

Which PCM pins are used to check the EGRVR circuit for a short to ground (HE114)?

Measure resistance between PCM Test Pin 47 and PCM Test Pins 24 and 103. Each resistance should be greater than 10,000 ohms.

When does this procedure say to replace the PCM?

In test HE114, if each resistance between PCM Test Pin 47 and PCM Test Pins 24 and 103 is greater than 10,000 ohms, replace the PCM, restore the vehicle, and rerun the Quick Test.

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Ford P1409 EGR Vacuum Regulator Circuit Pinpoint Tests HE112-HE114 (PCED)

Ford PCED DTC P1409 pinpoint test HE112-HE114: EGRVR harness open/short checks

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Service procedure (PCED) for DTC P1409: HE112 checks EGRVR circuit for open (PCM pin 47, <5.0 ohms), HE113 short to power (<1.0 V), HE114 short to ground (>10,000 ohms).

AI caption January 2005 · Photo 35 of 56

This document is a screenshot of a Ford PCED (Powertrain Control/Emissions Diagnosis) manual page displayed in Microsoft Internet Explorer, showing pinpoint diagnostic test steps HE112 through HE114 (with the heading of HE120 visible) for troubleshooting the EGR vacuum regulator (EGRVR/EVR) circuit, typically associated with DTC P1409. Step HE112 checks the EGRVR circuit for an open in the harness by measuring resistance between PCM Test Pin 47 and the EGR vacuum regulator solenoid harness connector with a breakout box installed and the PCM disconnected; less than 5.0 ohms passes to HE113, otherwise the open in the EVR circuit is repaired. Step HE113 checks for a short to power by measuring voltage between PCM Test Pin 47 and ground with key on/engine off; less than 1.0 volt proceeds to HE114. Step HE114 checks for a short to ground by measuring resistance between PCM Test Pin 47 and PCM Test Pins 24 and 103; if each resistance is greater than 10,000 ohms, the instruction is to replace the PCM. Each step ends with restoring the vehicle and rerunning the Quick Test. The visible HE120 heading covers Continuous Memory DTC P1409: wiggle the EGR vacuum regulator solenoid while monitoring VPWR.

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Frequently asked questions

How do I check the EGRVR circuit for an open in the harness (test HE112)?: Install a breakout box with the PCM disconnected, then measure resistance of the EGRVR circuit between PCM Test Pin 47 and the EGR vacuum regulator solenoid harness connector. If resistance is less than 5.0 ohms, go to HE113; if not, repair the open in the EVR circuit, restore the vehicle, and rerun the Quick Test.
How is the EGRVR circuit tested for a short to power (HE113)?: With the breakout box installed and PCM disconnected, turn the key on with the engine off and measure voltage between PCM Test Pin 47 and ground, then key off. If voltage was less than 1.0 volt, go to HE114; otherwise repair the short circuit, restore the vehicle, and rerun the Quick Test.
Which PCM pins are used to check the EGRVR circuit for a short to ground (HE114)?: Measure resistance between PCM Test Pin 47 and PCM Test Pins 24 and 103. Each resistance should be greater than 10,000 ohms.
When does this procedure say to replace the PCM?: In test HE114, if each resistance between PCM Test Pin 47 and PCM Test Pins 24 and 103 is greater than 10,000 ohms, replace the PCM, restore the vehicle, and rerun the Quick Test.
What is test HE120 for?: HE120 addresses Continuous Memory DTC P1409: wiggle the EGR vacuum regulator solenoid while monitoring VPWR (only the heading is visible on this page).