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3 CHECK VACUUM SOURCE TO EGR VALVE
Without CONSULT-II
1. Warm engine up to normal operating temperature.
2. Disconnect vacuum hose to EGR valve.
3. Check for vacuum existence at idle.
SEF337V
Vacuum should not exist at idle.
4. Disconnect EGRC-solenoid valve harness connector. (The 1st trip DTC for EGRC-solenoid valve will be displayed, but
ignore it.)
5. Check for vacuum existence when revving engine from 2,000 rpm up to 4,000 rpm.
Vacuum should exist when revving engine.
OK or NG
OK 䊳 GO TO 4.
NG 䊳 GO TO 5.
4 CHECK EGR VALVE
쐌 Apply vacuum to EGR vacuum port with a hand vacuum pump.
MEF137D
EGR valve spring should lift.
쐌 Check for sticking.
OK or NG
OK 䊳 GO TO 11.
NG 䊳 Repair or replace EGR valve.
DTC P0400 EGR FUNCTION (CLOSE)
KA24DE
Diagnostic Procedure (Cont’d)
EC-334
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