P2427-EGR COOLING VALVE CONTROL CIRCUIT HIGH

For a complete wiring diagram Refer to Section 8W

• When Monitored:

  With the ignition on and the ECM EGR Cooler Bypass command on.

• Set Condition:

  The ECM detects excessive current on the EGR Cooler Bypass Control circuit.

Diagnostic Test

NOTE: If the ECM detects and stores a DTC, the ECM also stores the engine/vehicle operating conditions under which the DTC was set. Some of these conditions are displayed on the scan tool at the same time the DTC is displayed.

NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may assist when checking for an active DTC.

NOTE: An open Main Relay power supply to the ECM will cause multiple DTC's including this DTC to set.

NOTE: Check the ECM for other DTC's. If other DTC's are set with this DTC refer to the symptom list and perform the CHECKING THE ECM POWER AND GROUND CIRCUITS test before continuing.