CONTROL GP-JOYSTICK 2713096 - Caterpillar

If Cat® Electronic Technician (ET) will not communicate with the ECM, refer to Troubleshooting, "Electronic Service Tool Does Not Communicate" before you begin this procedure. The procedure will verify that electrical power is being supplied to the ECM and to the service tool connector.The data links are used to communicate information between the engine ECM and other control modules that are a part of the application. Cat ET also communicates with the ECM via the data links.The service tool connector contains connections for electrical power and for the data links.Cat ET may display the following error message:"The version of the ECM is not recognized and the integrity of the changed parameters and displayed data is not guaranteed."This message indicates one of the following conditions:
The flash file in the ECM is newer than the version of Cat ET.
The latest version of Cat ET has not been installed.-9 Detected Problems
Loss of device battery power or ground
Loss of device keyswitch power supply
An invalid configuration parameter
Software incompatibility between two or more ECM's on the network
Hardware incompatibility between CAN-based system components
Damaged CAN data link wiring
Missing or damage terminating resistorsNOx Sensor Power Supply Enablement ConditionsA Cat ET service test, for overriding the power supply may be available for diagnostic testing purposes. If an override is unavailable, starting and running the engine in accordance with the sensor buffer power-on requirements will be necessary.The buffer is powered by the ECM after the following conditions are verified:
No diagnostic codes related to the NOX sensor are active
Engine speed above 500 rpm
Engine accumulated run time duration up to 3 minutes to remove moisture from sensor.
The calculated power on delay time has expired.An active diagnostic code is probably caused by a problem with a connector or harness for the CAN data link or the power supply. The next likely cause is a problem with the NOX sensor group. The least likely cause is a problem with the ECM.
Table 2
Component Electrical Checkout
NOx Sensor ET Service Test Override Parameter for the NOx sensor power supply
Illustration 1 g06123547
For the complete circuit details, refer to the full schematic.
Illustration 2 g06123566
For the complete circuit details, refer to the full schematic.
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 -9 code is active or logged.
Proceed