881201 1 Mercury WATER TUBE, (13.21 Inches)(Long)

Table 1
Diagnostic Codes Table
J1939 Code and Description Conditions which Generate this Code System Response
678-3 ECU 8 Volts DC Supply : Voltage Above Normal The digital sensor supply voltage is above normal for two seconds. The code is logged.
All sensors are set to default values.
678-4 ECU 8 Volts DC Supply : Voltage Below Normal The digital sensor supply voltage is below normal for two seconds.
5580-21 Engine Filtered Fuel Delivery Absolute Pressure : Data Drifted Low The 5 VDC supply to the sensor has been lost. The code is logged.
All sensors are set to default values.
3509-3 Sensor Supply Voltage 1 : Voltage Above Normal The analog sensor supply voltage is above normal for two seconds. The code is logged.
All sensors are set to default values.
3509-4 Sensor Supply Voltage 1 : Voltage Below Normal The analog sensor supply voltage is below normal for two seconds.
3510-3 Sensor Supply Voltage 2 : Voltage Above Normal The analog sensor supply voltage is above normal for two seconds. The code is logged.
All sensors are set to default values.
3510-4 Sensor Supply Voltage 2 : Voltage Below Normal The analog sensor supply voltage is below normal for two seconds.
5422-21 Engine Intake Manifold #2 Absolute Pressure : Data Drifted Low The 5 VDC supply to the sensor has been lost. The code is logged.
All sensors are set to default values.
3563-21 Engine Intake Manifold #1 Absolute Pressure : Data Drifted Low The 5 VDC supply to the sensor has been lost. The code is logged.
All sensors are set to default values.
5578-21 Engine Fuel Delivery Absolute Pressure : Data Drifted Low The 5 VDC supply to the sensor has been lost. The code is logged.
All sensors are set to default values. System OperationThe Electronic Control Module (ECM) supplies a regulated voltage of 5.0 0.2 VDC to the following sensors:
Barometric pressure sensor
Crankcase pressure sensor
Intake manifold pressure sensor
Filtered oil pressure sensor
Unfiltered oil pressure sensor
Fuel transfer pressure sensor (filtered)
Fuel transfer pressure sensor (unfiltered)
Turbocharger compressor inlet pressure sensor (No. 1 (left side))
Turbocharger compressor inlet pressure sensor (No. 2 (right side))The ECM supplies a regulated voltage of 8.0 0.4 VDC to the following sensors:
Sensor for the left turbocharger turbine inlet temperature
Sensor for the right turbocharger turbine inlet temperatureThe supply voltage for the sensors is routed from the ECM to terminal 1 of each sensor connector. The sensor return for the sensors is routed from the ECM to terminal 2 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.If a -21 code is logged, the 5 V supply is not available at the sensor connector. During normal engine operation, each of the signals from the pressure sensors fluctuate slightly. When the 5 V supply becomes unavailable at the pressure sensor connector, the signal from that sensor floats to a midrange value. The signal will not fluctuate. If the signal from the sensor remains abnormally steady for more than 30 seconds, the ECM will activate this code.Note: The sensors are not protected from overvoltage. A short from the supply line to the +Battery may damage the sensors. If the diagnostic code 678-3, 3509-3 or 3510-3 is logged, all of the sensors may have been damaged. Repair the sensor supply and check for any active sensor diagnostic codes in order to determine if a sensor has failed.
Illustration 1 g02670159
Schematic for the analog sensors
Illustration 2 g02678957
Schematic of the PWM sensors for the sensor signal circuit
Test Step 1. Inspect the Electrical Connectors and the Wiring
Turn the main disconnect switch to the OFF position.
Illustration 3 g02721290
Location of the J1/P1 and the J2/P2 ECM connectors (typical engine view)
(1) J1/P1 ECM connector
(2) J2/P2 ECM connector
Thoroughly inspect all of the connectors that are associated with the circuit. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Illustration 4 g02705497
Terminal locations at the P1 ECM connector for the analog sensors and the digital sensors
(P1-2) Analog sensor supply
(P1-3) Analog return
(P1-5) Digital return
(P1-15) Left turbo inlet pressure
(P1-18) Digital return
(P1-27) Right turbo inlet pressure
Illustration 5 g02705536
Terminal locations at the P2 ECM connector for the analog sensors
(P2-15) Intake manifold pressure
(P2-16) Fuel transfer pressure (unfiltered)
(P2-17) Analog return
(P2-27) Fuel transfer pressure (filtered)
(P2-28) Filtered oil pressure
(P2-29) Digital supply
(P2-30) Analog return
(P2-33) Crankcase pressure
(P2-54) Analog return
(P2-65) Left turbocharger turbine inlet temperature
(P2-66) Unfiltered oil pressure
(P2-72) Analog sensor supply
(P2-73) Left turbocharger turbine inlet temperature
(P2-78) Barometric pressure
(P2-80) Analog sensor supply
(P2-81) Analog sensor supply
(P2-82) Analog sensor supply
(P2-83) Analog return
(P2-92) Digital return
(P2-93) Analog return
Illustration 6 g02756396
Terminal locations at the right rail connector for the engine starting system
(26) Right turbo inlet pressure
(28) PWM signal
(36) 8V digital supply
(38) 5V analog supply
(39) Analog return
(40) Digital return