4 Runner 4WD L4-2.7L (3RZ-FE) (1996)
EGR Backpressure Transducer: Testing and 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 the EGR valve and EGR vacuum modulator.
3. CONNECT TOYOTA HAND-HELD TESTER OR OBD II SCAN TOOL
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Connect the TOYOTA hand-held tester or OBD II scan tool to the DLC3.
Please refer to the TOYOTA hand-held tester or OBD II scan tool operators manual for further details.
4. INSPECT OPERATION OF VSV AND EGR VACUUM MODULATOR
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Select the active test mode on the TOYOTA hand-held tester (VSV is closed.).
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If you have no TOYOTA hand-held tester, check these procedures:
(1) Remove the 3-way connector with the vacuum hose.
(2) Connect the vacuum hose (from port Q of EGR vacuum modulator) to the EGR valve.
(3) Plug the vacuum hose (from VSV for EGR).