361-76055-0 Tohatsu BRACKET, CHOKE SOLENOID

Table 1
Diagnostic Codes    
J1939 Code    Description    
100-10     Engine Oil Pressure : Abnormal Rate of Change    
102-10     Engine Intake Manifold #1 Pressure : Abnormal Rate of Change    
3509-3     Sensor Supply Voltage 1 : Voltage Above Normal    
3509-4     Sensor Supply Voltage 1 : Voltage Below Normal    
3510-3     Sensor Supply Voltage 2 : Voltage Above Normal    
3510-4     Sensor Supply Voltage 2 : Voltage Below Normal    Background InformationRefer to Illustration 1 and Illustration 2. There are two sensor supplies inside the ECM. Each sensor supply provides 5 VDC to a different connector on the ECM.Sensor supply 1 provides operating voltage for the engine sensors via the P2 connector. The engine sensors are divided into four groups. A terminal on the P2 connector provides 5 VDC for each group of sensors.Sensor supply 2 provides operating voltage for sensors that are provided by the OEM via the P1 connector.100-10 (J1939) Code - This code indicates that the 5 volt supply is missing from the harness connector for the oil pressure sensor. The engine must be running in order for this code to become active. During normal engine operation, the oil pressure fluctuates slightly. When the 5 volt supply is missing from the oil pressure sensor, the signal from the oil pressure sensor goes to a midrange value. The signal does not fluctuate. If the signal from the oil pressure sensor remains abnormally steady for more than 30 seconds, the Engine Control Module (ECM) activates this code. A snapshot is triggered. While this code is active, the ECM uses a default value for the oil pressure.102-10 (J1939) Code - This code indicates that the 5 volt supply is missing from the harness connector for the intake manifold pressure sensor. The engine must be running in order for this code to become active. During normal engine operation, the intake manifold pressure fluctuates slightly. When the 5 volt supply is missing from the intake manifold pressure sensor, the signal from the intake manifold pressure sensor goes to a midrange value. The signal does not fluctuate. If the signal from the intake manifold pressure sensor remains abnormally steady for more than 30 seconds, the ECM activates this code. A snapshot is triggered. While this code is active, the ECM sets the value of the intake manifold pressure to 100 kPa (14.5 psi). As a result, engine power is reduced.3509-3 (J1939) Code - This code indicates that the voltage of the P2 5 volt supply is above normal. During normal engine operation, the 5 volt supply should not exceed 5.16 VDC. If the 5 volt supply exceeds this value for more than one second, a snapshot is triggered.3509-4 (J1939) Code - This code indicates that the voltage of the P2 5 volt supply is below normal. During normal engine operation, the 5 volt supply should not go below 4.84 VDC. If the 5 volt supply goes below this value for more than one second, a snapshot is triggered.3510-3 (J1939) Code - This code indicates that the voltage of the P1 5 volt supply is above normal. During normal engine operation, the 5 volt supply should not exceed 5.16 VDC. If the 5 volt supply exceeds this value for more than one second, a snapshot is triggered. Engine power is reduced.3510-4 (J1939) Code - This code indicates that the voltage of the P1 5 volt supply is below normal. During normal engine operation, the 5 volt supply should not go below 4.84 VDC. If the 5 volt supply goes below this value for more than one second, a snapshot is triggered. Engine power is reduced.The following components can cause problems with the power supply:
Electrical connector or wiring
Sensor
ECMThe most likely cause of a problem is a problem with an electrical connector or wiring. The least likely cause is a problem with the ECM.Diagnostics on the Caterpillar Electronic Technician (ET)Wiggle Test - The wiggle test allows you to monitor the status of the power supply while you wiggle the wiring. This helps to identify faulty electrical connections.The wiggle test cannot be used to troubleshoot -10 codes. For additional information regarding the wiggle test, refer to the documentation that accompanies your Cat ET software.
Illustration 1 g02140418
Schematic diagram for sensor supply 1
Illustration 2 g02139841
Schematic diagram for sensor supply 2Test Step 1. Identify the Diagnostic CodeIdentify the diagnostic code.Results:
Logged -10 code. - Proceed to Test Step 3.
Logged 3509-3 or 3509-4 code - Proceed to Test Step 2.
Active 3509-3 code - Proceed to Test Step 4.
Active 3509-4 code - Proceed to Test Step 6.
Logged 3510-3 or 3510-4 code - Proceed to Test Step 10.
Active 3510-3 code - Proceed to Test Step 11.
Active 3510-4 code - Proceed to Test Step 14.Test Step 2. Wiggle the Wiring and Look for ProblemsCarefully following this procedure is a good way to identify the root cause of an intermittent problem.
Configure Cat ET for the wiggle test. Start the wiggle test.Note: Problems with the circuit must exist for at least one second before a diagnostic code for the 5 volt supply becomes active.
Slowly wiggle all of the wiring and the connectors between the P2 connector and each sensor. Pay particular attention to the wiring near each connector. As you wiggle the wiring, observe the wiring and the connectors. Look for these problems:
Loose connectors or damaged connectors
Moisture on the connectors or the wiring
Damage that is caused by excessive heat
Damage that is caused by chafing
Improper routing of wiring
Damaged insulationExpected Result:A "5 Volt Supply" diagnostic code becomes active when the wiring is wiggled.Results:
Yes - A "5 Volt Supply" diagnostic code becomes active when the wiring is wiggled.Repair: Repair the wiring, when possible. Replace parts, if necessary. Verify that the problem is resolved.STOP
No - A "5 Volt Supply" diagnostic code does not become active when the wiring is wiggled.Repair: There may be a problem with the P2 connector. Perform the following procedure:
Pull on each power wire at the back of the P2 connector in order to verify that the crimp is OK and