Troubleshooting guide

SERIES 60 EGR TECHNICIAN'S GUIDE

[b] If the results in t his step cannot be a ttained, Check VPOD Input Pressure.

NOTE:

Both activations must operate their component with full travel of the linkage to hit the

stops.

Check VPOD Inp ut Pressure

Follow these steps to ch eck VPOD in put pressure:

1. Measure VPOD input pressure to port 1; ensure it is between 703 – 1296 k Pa (90 –

120 psi).

[a] If the supply pressure is not between 703 – 1296 kPa (90 – 120 psi), troubleshoot the

vehicle air system until that result is obtained.

[b] If the supply pressure is between 703 – 1296 kPa (90 — 120 psi), Check Variable

Output Pressure Device (VPOD) P/N and Supply Voltage.

Check Variable Output Pressure Device (VPOD) P/N and Supply Voltage

The following checks should be performed for the VPOD P/N and supply voltage:

1. Check VPOD label to determine if it is + 12V or + 24V compatible.

2. Unplug VPODs mating connector. A 1,000 Ohm resistor is needed for the next step. Insert

the resistor between cavity 1 and 3 for ease of checking with the VOM.

[a] Turn ignition switch ON.

[b] Measure voltage from pin 3 to pin 1.

[c] Plug in DDR and check ECM voltage.

3. Is the VPOD P/N and voltage, and ECM voltage correct?

[a] If the VPOD P/N and voltage are correct, Check VPOD Wiring..

All information subject to change without notice. (Rev. April 2004) 5-11