0327969 JOHNSON NUT

Table 1
J1939 Code and Description Comments
51-9
Engine Throttle Position : Abnormal Update Rate The engine ECM is not communicating properly with the throttle actuator over the CAN data link.
The code is logged.
173-9
Engine Exhaust Gas Temperature : Abnormal Update Rate The engine ECM is not communicating properly with the Exhaust Temperature Module (ETM) over the Global CAN data link.
The code is logged.
633-9
Engine Fuel Actuator 1 Control Command : Abnormal Update Rate The engine ECM is not communicating properly with the fuel actuator valve.
The code is logged.
898-9
Engine Requested Speed/Speed Limit : Abnormal Update Rate The "Desired Speed Input Configuration" must be set to "CAN" for the code to be set.
The engine ECM is not communicating properly with the HMI display interface over the CAN data link.
The code is logged.
3221–9
Aftertreatment #1 Intake Wide-Range O2 Reading Stable : Abnormal Update Rate The ECM is not communicating properly with the oxygen sensor that is at the catalyst inlet.
The code is logged.
3226-9
Aftertreatment #1 Outlet NOx : Abnormal Update Rate The ECM is not communicating properly with the NOx sensor that is at the catalyst outlet..
The code is logged.
3542-9
Requested Engine Control Mode : Abnormal Update Rate The "Engine State Control Input Configuration" must be set to "CAN" for the code to be set.
The ECM is not communicating properly with the EMCP over the CAN data link.
The code is logged. 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
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 resistorsIf a -9 abnormal update rate diagnostic is active for the oxygen sensor circuit, verify the 24 VDC switched power to the voltage converter is present at the voltage converter input B. If the converter is not powered by the 24 VDC switched power, the 12 VDC regulated oxygen sensor power supply will also not be enabled.The voltage converter converts a filtered 24 VDC from the battery to 12 VDC that is used by the sensor circuit. The voltage convertor is powered and enabled by a 24 VDC switched power supply from the engine ECM. The voltage converter provides 12 VDC to each of the oxygen sensors.Note: Ensure that the correct part number for the NOx sensor is used. Installing a NOx sensor that is not an exact replacement or authorized service replacement will result in a loss of communication to the sensor.
Illustration 1 g06303063
For the complete circuit details, refer to the full schematic.
Illustration 2 g06302719
For the complete circuit details, refer to the full schematic.
Table 2
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 to Test Step 2.
2. Check the Part Number of the Affected Component
A. Locate the part number for the component that was identified by the active diagnostic.
B. Verify that the part number for the component is correct for the application.
Part Number
Result: The part number is correct for the application.
Proceed to Test Step 3.
Result: The part number is incorrect for the application.
Repair: Replace the component with the correct part number.
Note: Refer to Special Instruction , REHS8151 for special handling instructions if replacing a NOx sensor.
If the problem is not resolved, proceed to Test Step 3.
3. Check for Incorrect Configuration Parameters
A. Use Cat ET to verify that the correct parameters are being used.
Note: Refer to Troubleshooting , Configuration Parameters.
Result: The parameters are correct.
Proceed to Test Step 4.
Result: The parameters are not correct.
Repair: Input the correct parameters.
If the problem is not resolved, proceed to Test Step 4.
4. Check for Battery Voltage at the Affected Component
A. Turn the power to the ON position.
B. Measure the voltage between the following terminals on the wiring harness connector for the affected component:
- Battery (+) and Battery (-)
Battery Voltage
Result: There was battery voltage between the battery (+) and battery (-) terminals at the wiring harness connector.
Proceed to Test Step 5.
Result: There was not battery voltage between the battery (+) and battery (-) terminals at the wiring harness connector. There is an open or a short in the wiring harness.
Repair: Repair or replace the wiring harness.
If the problem is not resolved, proceed to Test Step 5.
5. Check the Termination Resistors for the J1939 Data Link
A. Turn the main disconnect switch to the OFF position.
B. At the affected component, measure the resistance between the following CAN data link terminals:
- CAN (+) and CAN (-)
60 10 Ohms
Result: The resistance is 60 10 Ohms. The termination resistors are OK.
Proceed to Test Step 6.
Result: The resistance is less than 50 Ohms. There are more than 2 termination resistors installed in the wiring harness or a short circuit has been detected.
Repair: Repair or replace damaged components.
If the problem is not resolved, proceed to Test Step 6.
Result: The resistance is approximately 120 10 Ohms. There is a problem with a termination resistor or a termination resistor is missing.
Repair: Check the resistance on each terminating resistor. Replace the failed termination resistor.
If the problem is not resolved, proceed to Test Step 6.
Result: The resistance is greater than 130 ohms. There is a problem with the wiring harness between the ECM and the next connection