EGR Valve: Testing and Inspection
On-vehicle Inspection1. Carry out the "EGR Control Inspection"
- If not as specified, perform the further inspection for the EGR valve.
Resistance Inspection
NOTE: Perform the following test only when directed.
1. Disconnect the negative battery cable.
2. Inspect resistance of the EGR valve coils. If as specified but the "EGR Control Inspection" is failed, inspect the vacuum hoses for improper routing, kinks or leakage, and inspect "Circuit Open/Short Inspection". If not as specified, replace the EGR valve.
3. Remove the EGR valve, and inspect for any damage or clogging. If not as specified, replace the EGR valve
4. Connect the negative battery cable.
Circuit Open/Short Inspection
Open circuit
- GND circuit (EGR valve connector terminal E and PCM connector terminal 2E)
- GND circuit (EGR valve connector terminal A and PCM connector terminal 2F)
- GND circuit (EGR valve connector terminal B and PCM connector terminal 2H)
- GND circuit (EGR valve connector terminal F and PCM connector terminal 21)
- Power circuit (EGR valve connector terminal C or D and main relay connector terminal D through common connector)
Short circuit
- EGR valve connector terminal E and PCM connector terminal 2E to GND
- EGR valve connector terminal A and PCM connector terminal 2F to GND
- EGR valve connector terminal B and PCM connector terminal 2H to GND
- EGR valve connector terminal F and PCM connector terminal 2I to GND