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EC-1612
[YD (WITHOUT EURO-OBD)]
DTC P0234 TC SYSTEM
DTC P0234 TC SYSTEM PFP:14411
Description BBS002AM
The load from the turbocharger boost control solenoid valve controls
the actuator. By changing the variable nozzle vane opening through
the rods, the intake air volume is adjusted.
The turbocharger boost control solenoid valve is moved by ON/OFF
pulse from the ECM. The longer the ON pulse, the charge air pres-
sure rises.
On Board Diagnosis Logic BBS002AN
The MI will not light up for these self-diagnoses.
NOTE:
If DTC P0234 is displayed with DTC P0652 or P0653, first perform trouble diagnosis for DTC P0652 or
P0653. Refer to EC-1691, "
DTC P0652, P0653 SENSOR POWER SUPPLY" .
Overall Function Check BBS002AO
Use this procedure to check the overall function of the turbocharger. During this check, a DTC might not be
confirmed.
1. Start engine and let it idle.
2. Make sure that turbocharger control actuator rod moves slightly
when engine is started.
3. If NG, go to EC-1614, "
Diagnostic Procedure" .
MBIB0626E
PBIB1897E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0234
0234
Turbocharger overboost
condition
ECM detects turbocharger boost pressure
is excessively high.
● Turbocharger
● Vacuum pump
● Turbocharger boost sensor
● Turbocharger boost control solenoid valve
PBIB1936E
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