Corolla Wagon L4-96.8 1587cc 1.6L DOHC (4A-FE) (1996)
EGR Valve: Testing and Inspection
EGR SYSTEM INSPECTION
1. INSPECT AND CLEAN FILTER IN EGR VACUUM MODULATOR
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Remove the cap and filter.
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Check the filter for contamination or damage.
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Using compressed air, clean the filter.
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Reinstall the filter and cap.
HINT: Install the filter with the coarser surface facing the atmospheric side (outward).
2. INSTALL VACUUM GAUGE
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Using a 3-way connector, connect a vacuum gauge to the hose between EGR valve and VSV.
3. INSPECT SEATING OF EGR VALVE
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Start the engine and check that the engine starts and runs at idle.
4. CONNECT TERMINALS TE1 AND E1 OF DATA LINK CONNECTOR 1
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Using SST, connect terminals TE1 and E1 of the data link connector 1. SST 09843-18020
5. INSPECT VSV OPERATION WITH COLD ENGINE
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The engine coolant temperature should be below 47 °C (117 °F).
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Check that the vacuum gauge indicates zero at 2,500 rpm.
6. INSPECT OPERATION OF VSV AND EGR VACUUM MODULATOR WITH HOT ENGINE
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Warm up the engine to above 53 °C (127 °F).
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Check that the vacuum gauge indicates low vacuum at 2,500 rpm.