(Table 219, contd)
Diagnostic Codes for the Solenoid Valves
J1939 Code PDL Code
Code Description
(code descriptions may
vary)
Comments
1188-6 526-6
Engine Turbocharger 1 Waste-
gate Drive : Current Above
Normal
The ECM detects the following conditions:
A high current condition in the output from the ECM to the solenoid in the
wastegate regulator
There are no active 168 diagnostic codes.
The ECM has been powered for at least 2 seconds.
The warning lamp will come on once the diagnostic code has been active for
30 seconds. The diagnostic code will be logged.
The engine will be derated while this diagnostic code is active. After the engine
derate has been activated, the electronic service tool will indicate “Turbo Pro-
tection Derate Active” .
This diagnostic code detects a fault in the circuit for the wastegate regulator.
This fault is most likely to be caused by a high side short to ground or a low
side short to power.
Follow the troubleshooting procedure in order to identify the root cause of the fault.
The following background information is related
to this procedure:
Electronically Controlled Wastegate
The engine has a turbocharger with an electronically
controlled wastegate. Typically, the wastegate is a
mechanical valve that is used in the turbocharger in
order to regulate the intake manifold pressure to a set
value.
The control system for the electronically controlled
wastegate precisely regulates the intake manifold
pressure by using a wastegate regulator to control
the wastegate.
The required intake manifold pressure is calculated
by the software that is contained in the ECM. The
ECM uses the wastegate regulator to control the
wastegate in order to provide the precise value of
intake manifold pressure. The solenoid in the
wastegate regulator is controlled by a PWM signal
from the ECM.
Suction Control Valve for the High-Pressure Fuel
Pump
The high-pressure fuel pump is equipped with a
suction control valve. The suction control valve
precisely controls the amount of fuel that enters the
high-pressure fuel pump.
The amount of fuel that is required is calculated by
the software that is contained in the ECM. The
solenoid in the suction control valve is controlled by a
PWM signal from the ECM.
410 UENR4469-36
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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