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A98018
+B2
+B1
EGR1
EGR3
EGR2
EGR4
Component Side:
05 -- 122
--
DIAGNOSTICS
ECD SYSTEM (1ND -- TV)
COROLLA Supplement (RM1129E)
DTC P0403 EXHAUST G AS RECIRCULATION CONTROL
CIRCUIT
CIRCUIT DESCRIPTION
Refer to DTC P0400 on page 05 -- 117
DTC No.
DTC Detection Condition
Trouble A reas
P0403
Open or short i n E GR valve c ircuit
(The MIL i s illuminated and a DTC is set when the s ame mal -
function is detected on 2 consecutive trips*
*: One trip i s c ounted when the i gnition switch is turned from
OFF to ON and back to OFF)
S
Open or short i n E GR circuit
S
EGR v alve assembly
S
ECM
HINT:
DTC P0403 is set when the ignition switch is in the ON position.
WIRING DIAGRAM
Refer to DTC P0400 on page 05 -- 117
.
INSPECTION PROCEDURE
HINT:
Read freeze frame data using an intelligent tester ll. Freeze frame data record the engine condition when
malfunctions are detected. When troubleshooting, freeze frame data c an help determine if the v ehicle was
moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction oc -
curred.
1 I NSPECT EGR VALVE ASSY
(a) Disconnect E21 EGR v alve connector.
(b) Measure the resistance between the terminals of the
EGR valve.
Standard:
Tester Connection
Specified Condition
+B1 (5) -- EGR1 (4)
19.6
±
1.4
Ω
+B1 (5) -- EGR3 (6)
19.6
±
1.4
Ω
+B2 (2) -- EGR2 (1)
19.6
±
1.4
Ω
+B2 (2) -- EGR4 (3)
19.6
±
1.4
Ω
NG
REPLACE EGR VALVE ASSY
OK
05MS2--01
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TOYOTA COROLLA REPAIR MANUAL SUPP 1129E