0304579 JOHNSON COVER, By-pass, upper

Table 1
Diagnostic Codes Table
Code Conditions which Generate this Code System Response
101-3 Crankcase Air Pressure Sensor : Voltage Above Normal The Electronic Control Module (ECM) detects signal voltage that is above normal for one second.
The ECM has been powered for at least three seconds. The code is logged.
The value of the parameter is set to zero.
101-4 Crankcase Air Pressure Sensor : Voltage Below Normal The ECM detects signal voltage that is below normal for one second.
The ECM has been powered for at least three seconds.
110-3 Engine Coolant Temperature Sensor : Voltage Above Normal The ECM detects signal voltage that is above normal for one second.
The ECM has been powered for at least three seconds. The code is logged.
The value of the parameter is set to −40 °C (−40 °F).
110-4 Engine Coolant Temperature Sensor : Voltage Below Normal The ECM detects signal voltage that is below normal for one second.
The ECM has been powered for three seconds.
273-3 Turbocharger Outlet Pressure Sensor : Voltage Above Normal The ECM detects signal voltage that is above normal for one second.
The ECM has been powered for at least three seconds. The code is logged.
The value of the parameter is set to zero.
273-4 Turbocharger Outlet Pressure Sensor : Voltage Below Normal The ECM detects signal voltage that is below normal for one second.
The ECM has been powered for three seconds.
274-3 Atmospheric Pressure Sensor : Voltage Above Normal The ECM detects signal voltage that is above normal for one second.
The ECM has been powered for at least three seconds. The code is logged.
The value of the parameter is set to 45 kPa (6.5 psi).
274-4 Atmospheric Pressure Sensor : Voltage Below Normal The ECM detects signal voltage that is below normal for one second.
The ECM has been powered for three seconds.
275-3 Right Turbocharger Inlet Pressure Sensor : Voltage Above Normal The ECM detects signal voltage that is above normal for one second.
The ECM has been powered for at least three seconds. The code is logged.
The value of the parameter is set to 45 kPa (6.5 psi).
275-4 Right Turbocharger Inlet Pressure Sensor : Voltage Below Normal The ECM detects signal voltage that is below normal for one second.
The ECM has been powered for three seconds.
276-3 Left Turbocharger Inlet Pressure Sensor : Voltage Above Normal The ECM detects signal voltage that is above normal for one second.
The ECM has been powered for at least three seconds. The code is logged.
The value of the parameter is set to 45 kPa (6.5 psi).
276-4 Left Turbocharger Inlet Pressure Sensor : Voltage Below Normal The ECM detects signal voltage that is below normal for one second.
The ECM has been powered for three seconds.
542-3 Engine Oil Pressure Sensor - Before Oil Filter : Voltage Above Normal The ECM detects signal voltage that is above normal for one second.
The ECM has been powered for at least three seconds. The code is logged.
The value of the parameter is set to 500 kPa (75 psi).
542-4 Engine Oil Pressure Sensor - Before Oil Filter : Voltage Below Normal The ECM detects signal voltage that is below normal for one second.
The ECM has been powered for three seconds.
543-3 Engine Oil Pressure Sensor - After Oil Filter : Voltage Above Normal The ECM detects signal voltage that is above normal for one second.
The ECM has been powered for at least three seconds. The code is logged.
The value of the parameter is set to 500 kPa (75 psi).
543-4 Engine Oil Pressure Sensor - After Oil Filter : Voltage Below Normal The ECM detects signal voltage that is below normal for one second.
The ECM has been powered for three seconds. System OperationUse this procedure to troubleshoot any suspect problems with the following sensors:
Atmospheric pressure sensor
Coolant temperature sensor
Crankcase pressure sensor
Filtered engine oil pressure sensor
Left turbocharger inlet pressure sensor
Right turbocharger inlet pressure sensor
Turbocharger outlet pressure sensor
Unfiltered engine oil pressure sensorThe supply voltage is routed to terminal A of each sensor connector. The sensor return is routed to terminal B of each sensor connector. The sensor signal is routed to terminal C of each sensor connector. The ECM provides short circuit protection for the internal power supply. A short circuit to the battery will not damage the internal power supply.The ECM performs an automatic calibration of these sensors whenever the ECM is powered and the engine is off for at least five seconds. During an automatic calibration, the ECM calibrates pressure sensors to the value of the atmospheric pressure sensor and against an acceptable offset pressure range.The ECM continuously outputs a pull-up voltage on the input terminal from an analog sensor. The ECM uses this pull-up voltage in order to detect an open or a short in the signal circuit. When the ECM detects the presence of a voltage that is above the normal range of the sensor on the signal circuit, the ECM will generate an open circuit diagnostic code -3 for that sensor. When the ECM detects the absence of the pull-up voltage on the signal circuit, the ECM will generate a short circuit diagnostic code -4 for that sensor. The presence of pull-up voltage at the sensor connector indicates that the wires from the sensor connector to the ECM are not open or shorted to ground.
Illustration 1 g01543834
Typical schematic
Illustration 2 g01234146
Location of ECM connectors
Illustration 3 g01572094
P1 ECM connector
(P1-2) 5 V sensor supply
(P1-3) Sensor return
(P1-7) Coolant temperature sensor
(P1-16) Filtered engine oil pressure sensor
(P1-17) Unfiltered engine oil pressure sensor
(P1-18) 5 V sensor supply
(P1-35) Sensor return
Illustration 4 g01572093
P2 ECM connector
(P2-36) Turbocharger outlet pressure sensor
(P2-37) Atmospheric pressure sensor
(P2-38) Left turbocharger inlet pressure sensor
(P2-39) Right turbocharger inlet pressure sensor
(P2-46) Crankcase pressure sensor
Illustration 5 g01094844