EGR Control Solenoid Valve
- Start engine, and bring to full operating temperature. Disconnect vacuum hose from EGR valve, and connect a vacuum gauge. If vacuum does not exist, go to step 2). If vacuum is present, inspect EGR system hose routing. Check for short in Red wire between ECU and EGR control solenoid valve. If hose routing and wire are okay, replace solenoid valve.
- Turn off ignition. Disconnect 4-pin connector from control box. Using jumper wires, connect battery voltage to connector terminal D and ground connector terminal C. See Fig 1
. Start engine, and observe vacuum gauge. If gauge does not read approximately 8 in. Hg, go to next step. If specified vacuum does register, solenoid valve is okay.
- Remove control box cover. Disconnect lower hose on EGR control solenoid valve, and connect a vacuum gauge to hose. If gauge reads 8 in. Hg, replace EGR control solenoid valve. If specified vacuum does not register on gauge, check vacuum hose routing to CVC valve. If hose routing is okay, replace CVC valve.
Courtesy of AMERICAN HONDA MOTOR CO., INC.