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DTC P0234 TC SYSTEM
EC-1187
[YD (WITH EURO-OBD)]
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EC
5. CHECK TURBOCHARGER BOOST CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR
OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals 6 and turbocharger boost control solenoid valve termi-
nals 2.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
6. CHECK TURBOCHARGE BOOST CONTROL SOLENOID VALVE
Refer to EC-1188, "
Component Inspection" .
OK or NG
OK >> GO TO 7.
NG >> Replace turbocharger boost control solenoid valve.
7. CHECK VACUUM PUMP
Refer to EM-167, "
VACUUM PUMP" .
OK or NG
OK >> GO TO 8.
NG >> Replace vacuum pump assembly.
8. CHECK TURBOCHARGER BOOST CONTROL ACTUATOR
1. Turn ignition switch OFF.
2. Install a vacuum pump to turbocharger boost control actuator.
3. Make sure that the turbocharger boost control actuator rod
moves smoothly when applying vacuum of −53.3kPa (−
533mbar, −400mmHg, −15.75inHg) and releasing it.
OK or NG
OK >> GO TO 9.
NG >> Replace turbocharger assembly.
9. CHECK TURBOCHARGER BOOST SENSOR
Refer to EC-1195, "
Component Inspection" .
OK or NG
OK >> GO TO 10.
NG >> Replace turbocharger boost sensor.
10. CHECK INTERMITTENT INCIDENT
Refer to EC-1058, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>> INSPECTION END
Continuity should exist.
MBIB1022E
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