875285T 1 Mercury ALTERNATOR

Table 1
J1939 Code and Description CDL Code and Description Comments
100-21
Engine Oil Pressure : Data Drifted Low 100-21
Engine Oil Pressure Sensor : Data Drifted Low The 5 VDC supply to the sensor has been lost.
The code is logged.
101-21
Engine Crankcase Pressure : Data Drifted Low 101-21
Crankcase Air Pressure Sensor : Data Drifted Low The 5 VDC supply to the sensor has been lost.
The code is logged.
108-21
Barometric Pressure : Data Drifted Low 3528-21
Barometric Pressure Sensor : Data Drifted Low The 5 VDC supply to the sensor has been lost.
The code is logged.
678-3
ECU 8 Volts DC Supply : Voltage Above Normal 41-3
8 Volt DC Supply : Voltage Above Normal The code is logged.
678-4
ECU 8 Volts DC Supply : Voltage Below Normal 41-4
8 Volt DC Supply : Voltage Below Normal The code is logged.
1208–21
Engine Pre-filter Oil Pressure : Data Drifted Low 542–21
Engine Pre-filter Oil Pressure : Data Drifted Low The 5 VDC supply to the sensor has been lost.
The code is logged.
3509-3
Sensor Supply Voltage 1 : Voltage Above Normal 262-3
5 Volt Sensor DC Power Supply : Voltage Above Normal All sensors are set to default values.
The code is logged.
3509-4
Sensor Supply Voltage 1 : Voltage Below Normal 262-4
5 Volt Sensor DC Power Supply : Voltage Below Normal All sensors are set to default values.
The code is logged.
3510-3
Sensor Supply Voltage 2 : Voltage Above Normal 2131-3
5 Volt Sensor DC Power Supply #2 : Voltage Above Normal Engine power may be derated.
The code is logged.
3510-4
Sensor Supply Voltage 2 : Voltage Below Normal 2131-4
5 Volt Sensor DC Power Supply #2 : Voltage Below Normal Engine power may be derated.
The code is logged.
3511–11
Sensor Supply Voltage 3 : Other Failure Mode 5067–11
Aftertreatment #1 Sensor Supply #1 : Other Failure Mode Engine power may be derated.
The code is logged.
3512–11
Sensor Supply Voltage 4 : Other Failure Mode 5068–11
Aftertreatment #1 Sensor Supply #2 : Other Failure Mode Engine power may be derated.
The code is logged.
3513–11
Sensor Supply Voltage 5: Other Failure Mode 5069–11
Aftertreatment #2 Sensor Supply #1 : Other Failure Mode Engine power may be derated.
The code is logged.
3514–11
Sensor Supply Voltage 6: Other Failure Mode 5070–11
Aftertreatment #2 Sensor Supply #2 : Other Failure Mode Engine power may be derated.
The code is logged.
3563-21
Engine Intake Manifold #1 Absolute Pressure : Data Drifted Low 1785-21
Intake Manifold Pressure Sensor : Data Drifted Low The 5 VDC supply to the sensor has been lost.
The code is logged.
5422–21
Engine Intake Manifold #2 Absolute Pressure : Data Drifted Low 3031–21
Intake Manifold #2 Pressure Sensor : Data Drifted Low The 5 VDC supply to the sensor has been lost.
The code is logged.
5578–21
Engine Fuel Delivery Absolute Pressure : Data Drifted Low 289–21
Fuel Pressure Sensor - Before Fuel Filter : Data Drifted Low The 5 VDC supply to the sensor has been lost.
The code is logged.
5580-21
Engine Filtered Fuel Delivery Absolute Pressure : Data Drifted Low 460-21
Fuel Pressure Sensor - After Fuel Filter : Data Drifted Low The 5 VDC supply to the sensor has been lost.
The code is logged. The Electronic Control Module (ECM) supplies a regulated voltage of 5.0 0.2 VDC to the sensors.The 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.Note: The sensors are not protected from overvoltage. A short from the supply line to the +Battery may damage the sensors. If any of the diagnostic codes are active, a sensor may have been damaged. Repair the sensor supply and check for any active sensor diagnostic codes to determine if a sensor has been damaged.
Illustration 1 g06104265
Engine ECM
Illustration 2 g06104962
Selective Catalyst Reduction (SCR) Controller
Illustration 3 g06104945
Engine ECM with PWM sensors
Illustration 4 g03740995
Sensor connector
(1) Sensor supply
(2) Sensor return
(3) Signal
Table 2
Sensor Supply Sensor Supply ECM Location
Sensor Supply #1 Sensors on A5:E4 engine ECM J2 connector or A5:E2 aftertreatment controller J2 connector
Sensor Supply #2 Sensors on A5:E4 engine ECM J1 connector Probable Causes
Codes
SensorRecommended Actions
Table 3
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Determine if a code is active or logged.
Codes
Result: A -3 or -4 code is active or logged. Note which ECM is reporting the active code.
Proceed to Test Step 2.
Result: A -21 code is active or logged.
Proceed to Test Step 3.
2. Check for a Failed Sensor
A. Connect Cat ET.
B. Disconnect a sensor on the affected sensor supply circuit.
C. Use Cat ET to monitor following:
- Codes
D. Connect the affected sensor to the wiring harness.
E. Repeat Step B through Step D for each sensor on the affected sensor supply.
Sensor
Result: The affe