0335044 EVINRUDE FRAME, Rear

Table 1
J1939 Code and Description Comments
1180-3
Engine Turbocharger 1 Turbine Inlet Temperature : Voltage Above Normal The ECM detects a duty cycle that is greater than 96 percent for ten seconds.
The code is logged.
1180-4
Engine Turbocharger 1 Turbine Inlet Temperature : Voltage Below Normal The ECM detects a duty cycle that is less than 4 percent for ten seconds.
The code is logged.
1180-8
Engine Turbocharger 1 Turbine Inlet Temperature : Abnormal Frequency, Pulse Width, or Period The ECM detects a sensor frequency that is greater than 600 Hz or less than 400 Hz.
Illustration 1 g06488169
For the complete circuit details, refer to the full schematic.
Table 2
Troubleshooting Test Steps Values Results
1. Check for Active Codes and Logged Codes
A. Connect the Cat® Electronic Technician (Cat ET) Service Tool to the service tool connector.
B. Monitor the diagnostic codes on Cat ET. Check and record any diagnostic codes.
Note: Wait at least 30 seconds for the diagnostic codes to become active.
C. Determine if a diagnostic code has occurred several times.
Note: A diagnostic code that is logged several times is an indication of an intermittent problem. Most intermittent problems are the result of a bad connection between a socket and a pin in a connector. There could also be a bad connection between a wire and a terminal.
D. Look for one or more of the following diagnostic codes that are active or logged:
- 1180-3
- 1180-4
- 1180-8
Codes
Result: A code is not active or logged.
Repair: There may be an intermittent problem in the harness or in a connector. If an intermittent problem is suspected, refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct procedures for inspecting electrical connectors.
Result: A code is active or logged.
The ECM detects a problem in one of the circuits for the exhaust temperature sensors.
Proceed to Test Step 2.
2. Check the Digital Supply Voltage at the Sensor Connector
Note: If there is a code for the 8 volt power supply, proceed to Troubleshooting, "Sensor Supply - Test" before proceeding.
A. Turn the main disconnect switch to the OFF position.
B. Disconnect the suspect sensor at the sensor connector.
C. Restore the electrical power to the ECM.
D. Measure the supply voltage on the harness side of the sensor connector. Measure the voltage between terminal 1 and terminal 2 for the suspect sensor.
8.0 0.4 VDC
Result: The supply voltage is 8.0 0.4 VDC. The supply voltage is OK.
Proceed to Test Step 4.
Result: The supply voltage is not 8.0 0.4 VDC. The supply voltage is Not OK.
Determine the cause of the open circuit and remedy the problem.
Verify that the repair eliminated the problem.
3. Check the duty cycle for the Suspect Sensor at the Sensor Connector
A. Remove the electrical power to the ECM.
B. Remove the sensor signal wire from terminal 3 on the sensor side of the sensor connector.
C. Restore the electrical power to the ECM.
D. Measure the duty cycle between the loose signal wire and terminal 2 (Supply return) of the sensor connector.
E. Restore the wiring to the original configuration.
10 to 90 percent.
Result: The duty cycle is between 10 percent to 90 percent. The duty cycle is OK.
Proceed to Test Step 5.
Result: The duty cycle is not OK.
Repair: Replace the sensor.
Verify that the repair eliminated the problem.
4. Check the Duty Cycle for the Suspect Sensor at the ECM
A. Turn the main disconnect switch to the OFF position.
B. Disconnect the L-C1 ECM connectors.
C. Remove the signal wire for the suspect sensor from terminal location 68 of the L-C2 ECM connector.
G. Measure the duty cycle between the removed sensor signal wire and the (Supply return), terminal location 92 of the L-C2 ECM connector.
I. Restore all wiring to the original configuration.
10 to 90 percent.
Result: The duty cycle is between 10 percent to 90 percent. The duty cycle is OK.
Repair: The duty cycle is correct. The sensor is producing the correct signal. There is a problem with the ECM. Replace the ECM. Refer to Troubleshooting, "Test ECM Mode".
Verify that the repair eliminated the problem.
Result: The duty cycle is not OK.
Repair: The sensor signal is OK at the sensor connector, but the sensor signal is not reaching the ECM. There is a problem in the wiring between the sensor connector and the ECM. Repair the connectors and/or wiring between the sensor connector and the ECM.
Verify that the repair eliminated the problem.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).