Circuit Description The turbocharger wastegate is a vacuum actuated valve used to control the exhaust gas heat sent to the turbo. The wastegate pulse width modulated solenoid meters the vacuum level at the wastegate valve actuator as commanded by the PCM. When the PCM is commanding the wastegate solenoid ON, the voltage potential of the… Read More »
C ircuit Description The EGR flow is controlled by the vacuum actuated EGR va l ve. The EGR pulse width modulated solenoid meters the vacuum level at the EGR valve actuator as commanded by the PCM. When the PCM is commanding the EGR solenoid ON, the voltage potential of the circuit will be low (near… Read More »
C ircuit Description A dash light is illuminated by the PCM if the diagnostics has detected certain errors related to the accelerator pedal position (APP) sensor. When the PCM is commanding the Service Throttle Soon lamp ON, the voltage potential of the circuit will be low (near 0 volts). When the PCM is commanding the… Read More »
Circuit Description The EGR flow is controlled by the vacuum actuated EGR valve. The EGR vent so l enoid purges to atmosphere the vacuum level at the EGR val ve actuator as commanded by the PCM. This is done when the EGR flow is desired to turn off quickly. When the PCM is commanding the… Read More »
Refer to Glow Plug Controls Circuit Description A dash light (Wait To Start) is illuminated by the PCM when the glow plugs are commanded ON. When the PCM is commanding the Wait To Start lamp ON, the voltage potential of the circuit will be low (near 0 volts). When the PCM is commanding the Wait… Read More »
Circuit Description A dash light is illuminated by the PCM if diagnostics have detected certain errors related to the engine performance or engine sensor status. When the PCM is commanding the MIL ON, the voltage potential of the circuit will be low (near 0 volts), When the PCM is commanding the MIL OFF, the voltage… Read More »
Circuit Description The PCM provides a 5 vol t supply for use in powering up sensors. This test monitors the voltage present at terminals BRD13 (shared by Boost, EGR control pressure/BARO and crankshaft position sensors) and BRD14 (optical/fuel temperature sensor (cam/hl.res). Conditions for Running the DTC The ignition switch in the ON position. Conditions for… Read More »
Circuit Description This test checks for mismatched (incorrect) passwords between the Passlock module and PCM. Whenever the Passlock module or PCM are replaced, a theft learn procedure must be followed in order for the new password to be learned. Conditions for Running the DTC The ignition switch in the ON position. Conditions for Setting the… Read More »
C ircuit Description This diagnostic test checks for the Enable Password Learning Flag indicating the PCM is in learn password mode. This mode allows the PCM to learn the password from the Passlock module at assembly or when being serviced. The password needs to be learned whenever the PCM or the Passlock module is replaced,… Read More »
Circuit Description The Passlock Module receives the code from the hall effect sensor in the steering column and compares it to the code the Passlock module learned at the first power up at the factory. If this code matches the code stored in the Passlock module, the Passlock module will send a fuel continue message… Read More »