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DTC P0402 EGRC-BPT VALVE FUNCTION EC-291 [KA24DE] C D E F G H I J K L M A EC 8. CHECK EGR VALVE Refer to EC-291, "Component Inspection" OK or NG OK >> GO TO 9. NG >> Replace EGR valve. 9. CHECK INTERMITTENT INCIDENT Perform EC-120, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" >> INSPECTION END. Component Inspection UBS00D6V EGRC-BPT VALVE 1. Plug one of two ports of EGRC-BPT valve. 2. Vacuum from the other port and check leakage without applying any pressure from under EGR-BPT MASS AIR FLOW SENSOR 1. Turn ignition switch ON. 2. Start engine and warm it up to normal operating temperature. 3. Check voltage between ECM terminal 54 (mass air flow sensor *: Check for linear voltage rise in response to increases to about 4,000 rpm in 4. If the voltage is out of specification, disconnect mass air flow sensor harness connector and connect it SEF172P Conditions Voltage [V] Ignition switch ON (Engine stopped.) Less than 1.0 Idle (Engine is warmed-up to normal operating 0.9 - 1.8 2,500 rpm (Engine is warmed-up to normal 1.9 - 2.3 Idle to about 4,000 rpm* 1.3 - 1.7 to Approx. 3.0 SEF326V |