P0403-EGR SOLENOID CIRCUIT EXCESSIVE CURRENT
For a complete wiring diagram Refer to Section 8W
- When Monitored:
With the ignition on and the ECM EGR Solenoid command on.
- Set Condition:
The ECM detects excessive current on the EGR Solenoid Control circuit.
| Possible Causes |
| INTERMITTENT CONDITION |
| EGR SOLENOID |
| (K35) EGR SOLENOID CONTROL SHORTED TO VOLTAGE |
| ENGINE CONTROL MODULE - INTERNAL SHORT TO VOLTAGE |
Diagnostic Test
1. CHECK FOR ACTIVE DTCNOTE: 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.
Turn the ignition on.
With the scan tool, erase ECM DTCs.
Test drive the vehicle and monitor the scan tool for ECM DTCs.
Did this DTC set again?
Yes
- Go To 2
No
- Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
2. EGR SOLENOID
Turn the ignition off.
Disconnect the EGR Solenoid harness connector.
Turn the ignition on.
With the scan tool, erase ECM DTCs.
Monitor the scan tool for ECM DTCs.
Does the scan tool display P0403 EGR OPEN CIRCUIT?
Yes
- Replace the EGR Solenoid.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
No
- Go To 3
3. (K35) EGR SOLENOID CONTROL SHORTED TO VOLTAGE
Turn the ignition off.
Disconnect the ECM harness connectors.
Remove the ASD Relay from the PDC.
Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay connector.
Turn the ignition on.
Measure the voltage of the (K35) EGR Solenoid Control circuit.
Is the voltage below 0.5 volt?
Yes
- Replace and program the Engine Control Module in accordance with the Service Information.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
No
- Repair the (K35) EGR Solenoid Control circuit for a short to voltage.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).