120H2 -- 01
A98444
DLC3
Intelligent tester II
--
EMISSION CONTROL
EGR SYSTEM (1ND -- TV)
12 -- 3
COROLLA Supplement (RM1129E)
EGR SYSTEM (1ND -- TV)
ON -- VEHICLE INSPECTION
HINT:
A malfunction causing constant operation of the EGR system may cause black or white smoke to be emitted
from the exhaust pipe.
1. INSPECT SEATING OF EGR VALVE
(a) Start the engine and check that it starts and idles.
2. INSPECT EGR SYSTEM
(a) Warm up the engine.
(b) Turn the ignition switch to OFF.
(c) Connect the intelligent tester II to the DLC3.
(d) EGR valve operation (Full Close).
(1) Disconnect the EGR valve connector.
(2) Start the engine and let it idle.
(3) Turn the intelligent tester ll ON.
(4) Select the following menu items: Powertrain / En -
gine and ECT / Data List / MAF.
(5) Check the MAF reading with the engine idling.
Standard: MAF reading is between 7.5 g/s and 9.5 g/s
(6) Stop the engine with turning the engine switch to
OFF, then connect the EGR valve connector.
(7) Clear the DTC(s).
(e) EGR valve operation (Full Open).
(1) Start the engine and let it idle.
(2) Turn the intelligent tester ll ON.
(3) Select the following menu items: Powertrain / En -
gine and ECT / Data List / MAF and EGR Step POS.
(4) Warm up the engine. The coolant temperature
should be between 75
_
C (167
_
F) and 90
_
C
(194
_
F).
(5) Check the MAF reading when EGR Step POS is
step 125.
Standard: MAF reading is between 4.0 g/s and 5.0 g/s
If the MAF reading is out of range in either step (d) -- (5) or (e)
-- (5), replace the EGR v alve.
If the MAF reading is out of range in both steps (d) -- (5) and (e)
-- (5), check the air flow meter
(f)
Stop the engine with the engine switch OFF.
(g)
Disconnect the intelligent tester ll from the DLC3.
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TOYOTA COROLLA REPAIR MANUAL SUPP 1129E