Corolla CE Sedan 4-Door L4-1587cc 1.6L DOHC MFI (1997)
EGR Valve: Testing and Inspection
On Vehicle Inspection
EGR SYSTEM INSPECTION
1. INSPECT AND CLEAN FILTER IN EGR VACUUM MODULATOR
(a) Remove the cap and filter.
(b) Check the filter for contamination or damage.
(c) Using compressed air, clean the filter.
(d) Reinstall the filter and cap.
HINT: Install the filter with the coarser surface facing the atmospheric side (outward).
2. INSTALL VACUUM GAUGE
Using a 3-way connector, connect a vacuum gauge to the hose between EGR valve and VSV.
3. INSPECT SEATING OF EGR VALVE
Start the engine and check that the engine starts and runs at idle.
4. CONNECT TERMINALS TE1 AND E1 OF DLC1
Using SST. connect terminals TE1 and E1 of the DLC1.
SST 09843-18020
5. INSPECT VSV OPERATION WITH COLD ENGINE
(a) The engine coolant temperature should be below 47°C (117°F).
(b) Check that the vacuum gauge indicates zero at 2,500 rpm.
6. INSPECT OPERATION OF VSV AND EGR VACUUM MODULATOR WITH HOT ENGINE
(a) Warm up the engine to above 53°C (127°F).
(b) Check that the vacuum gauge indicates low vacuum at 2.500 rpm.
