ELECTRONIC TECHNICIAN (ET) TROUBLESHOOTING - Continued
Injection Actuation Pressure Sensor Test.
System Operation Description:
Use Figure 6 and Figure 8 to troubleshoot the system when the following diagnostic code is active:
164-E-02 Injector Actuation Pressure signal erratic
This procedure can be used to check the accuracy of the injection actuation pressure sensor
against a pressure gauge.
The injection actuation pressure sensor measures the pressure of the oil in the high pressure oil manifold. The
high pressure oil in the manifold is used to actuate the injectors and the high pressure oil is used to control the
fuel injection pressure. The fuel injection pressure is based on inputs from the sensors. The inputs are used by
the Electronic Control Module (ECM) for calculating the fuel injection pressure. The ECM uses the signal from the
injection actuation pressure sensor to calculate the control signal for the injection actuation pressure control valve.
Erratic, Intermittent, or Incorrect Signal.
On EMCP set ENGINE CONTROL switch to OFF/RESET. Set Battery
Disconnect Switch to OFF. Set DEAD CRANK SWITCH to OFF.
Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to NORMAL.
On EMCP set ENGINE CONTROL switch to COOL DOWN/STOP.