0391536 JOHNSON PROPELLER, 15-1/2 X 13

Table 1
Diagnostic Codes Table
J1939 Code and Description Conditions that Generate this Code System Response
678-3
ECU 8 Volts DC Supply : Voltage Above Normal The digital sensor supply voltage is above normal for one second. The code is logged.
All affected 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 one second.
3358-21
Engine Exhaust Gas Recirculation Inlet Pressure : Data Drifted Low The ECM detects no 5 VDC supply to the Nox Reduction System (NRS) Engine Exhaust Gas Recirculation Inlet Pressure : Data Drifted Lowabsolute pressure sensor. The code is logged.
3509-3
5 Volt Sensor DC Power Supply : Voltage Above Normal This code indicates that the voltage of the sensor supply is above normal. During normal engine operation, the supply voltage must not exceed 5.16 V. The code is logged.
All affected sensors are set to default values.
3509-4
5 Volt Sensor DC Power Supply : Voltage Below Normal This code indicates that the voltage of the 5 V supply is below normal. During normal engine operation, the 5 V supply must not drop below 4.84 V. The code is logged.
All affected sensors are set to default values.
3510-3
Sensor Supply Voltage 2 : Voltage Above Normal This code indicates that the voltage of sensor supply 2 is above normal. During normal engine operation, the supply voltage must not exceed 5.16 V. The code is logged.
All affected sensors are set to default values.
3510-4
Sensor Supply Voltage 2 : Voltage Below Normal This code indicates that the voltage of the 5 V supply is below normal. During normal engine operation, the 5 V supply must not drop below 4.84 V. The code is logged.
All affected sensors are set to default values.
3563-21
Engine Intake Manifold #1 Absolute Pressure : Data Drifted Low
Left -hand sensor The ECM detects no 5 V supply to the intake manifold pressure sensor #1. The code is logged.
5422-21
Engine Intake Manifold #2 Absolute Pressure : Data Drifted Low
Right -hand sensor The ECM detects no 5 V supply to the intake manifold pressure sensor #2. The code is logged. System OperationThe Electronic Control Module (ECM) supplies a regulated voltage of 5.0 0.2 VDC to the following sensors:
Engine oil pressure sensor
Barometric pressure sensor
Crankcase pressure sensor
Intake manifold pressure sensor #1 (left-hand)
Intake manifold pressure sensor #2 (right-hand)
NRS absolute pressure sensor
Fuel pressure sensor before the filter
Fuel pressure sensor after the filter
NRS delta pressure sensor
Auxiliary #1 Pressure SensorThe ECM supplies a regulated voltage of 8.0 0.4 VDC to each of the throttle position 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 -21 code becomes active when the ECM determines that the 5 V supply is missing at the pressure sensor. The ECM sets the value of the suspect sensor to the default value.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 three diagnostic codes are active, one of the sensors may be damaged. Repair the sensor supply and check for any active sensor diagnostic codes in order to determine if a sensor has been damaged.
Illustration 1 g03884993
Illustration 2 g02160270
Schematic for the 8 V sensors
Test Step 1. Inspect the Electrical Connectors and the Wiring
Remove the electrical power from the ECM.
Illustration 3 g02138858
Location of the ECM connectors (left side engine view)
(1) J1/P1 ECM connectors
(2) J2/P2 ECM connectors
Thoroughly inspect connectors (1) and (2). Inspect all of the connectors that are associated with the sensors. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Illustration 4 g02138860
Terminal locations at the P1 ECM connector for the analog sensor supply and the digital sensor supply
(P1-2) Analog sensor supply
(P1-3) Analog sensor return
(P1-4) Digital sensor supply
(P1-5) Digital sensor return
Illustration 5 g03885108
Terminal locations at the P2 ECM connector for the analog sensor supplies
(P2-30) Analog sensor return
(P2-72) Analog sensor supply
(P2-80) Analog sensor supply
(P2-81) Analog sensor supply
(P2-83) Analog sensor return
(P2-93) Analog sensor return
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connectors that are associated with the circuit.
Check the allen head screw for each of the ECM connectors for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Check the harness and wiring for abrasion and for pinch points from the sensors back to the ECM. Expected Result:All connectors, pins, and sockets are coupled and/or inserted and the harness and wiring are free of corrosion, of abrasion and of pinch points.Results:
OK - The harness and connectors appear to be OK. Proceed to Test Step 2.
Not OK - There is a problem with the connectors and/or wiring.Repair: Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the seals are properly in place and ensure that the connectors are coupled.Verify that the repair eliminates the problem.STOPTest Step 2. Check for Diagnostic Codes that are Active or Logged
Connect Caterpillar Electronic Technician (ET) to the service tool connector.
Restore electrical power to the ECM.
Monitor the active diagnostic code screen on Cat ET. Check and record any diagnostic codes that are active or logged. Look for the following diagnostic codes:
678-3
678-4
3358-21
3509-3
3509-4
3510-3
3510-4
2131-4
3563-21
5422-21Note: Wait at least 30 seconds in order for the diagnostic codes to become active.
Remove the electrical power from the ECM. Expected Result: