A84847
E21
Wire Harness Side:
EGR Valve Connector
Front View
A09818
Signal Waveform
10 V/
Division
GND
0.5 msec./Division
05 -- 96
--
DIAGNOSTICS
ECD SYSTEM (1ND -- TV)
COROLLA Supplement (RM1129E)
12 INSPECT ECM(EGR VOLTAGE)
(a) Disconnect the E21 EGR valve c onnector.
(b) Inspect the ECM using an oscilloscope.
(c) While repeating quick engine RPM accelerations, c heck
the waveform between the terminals of the E21 EGR
valve c onnector.
Standard:
Tester Connection
Specified Condition
(E21 -- 6) -- Body ground
Correc t wav eform s hown
(E21 -- 5) -- Body ground
Correc t wav eform s hown
(E21 -- 4) -- Body ground
Correc t wav eform s hown
(E21 -- 3) -- Body ground
Correc t wav eform s hown
(d) Reconnect the EGR v alve connector.
OK
13 CHECK FOR DEPOSIT(EGR VALVE ASSY)
OK: No deposit
NG REMOVE FOREIGN OBJECT AND CLEAN EGR
VA LV E
OK
14 CHECK FOR DEPOSIT(EGR PSSAGE)
OK: No deposit
NG REPAIR OR REPLACE MALFUNCTIONING
PARTS, COMPONENT AND AREA
OK
15 CHECK FOR EXHAUST G AS LEAKS
OK: No leakage
NG CHECK EXHAUST GAS LEAKAGE POINT
OK
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TOYOTA COROLLA REPAIR MANUAL SUPP 1129E