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Symptom Tree t112
| Cause | Correction |
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Programmable parameters or selected features are not correct |
Check the programmable parameters and the selected features with an electronic service tool. Set the parameters and features again, if necessary. Refer to Procedure 019-078 in Section 19. Check the J1939 multiplexing programmable parameters. Set the multiplexing parameters according to OEM guidelines. Refer to Multiplexing Troubleshooting Service Bulletin 4021378. |
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Electronic control module (ECM) calibration is malfunctioning |
Verify that the electronic control module (ECM) calibration is correct. Check the calibration revision history for applicable fixes to the calibration stored in the ECM. Refer to the calibration history spreadsheet Click here to see ecm_calibration_rev_history.xls on QuickServe™ Online Internet Website or the INCAL™ calibration CD. Compare the calibration stored in the ECM with the engine rating and the Control Parts List (CPL), Bulletin 4021326 or 4021327. If necessary, calibrate the ECM. Refer to the appropriate electronic service tool manual and Procedure 019-032 in Section 19. |
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Vehicle speed sensor (VSS) or circuit is malfunctioning |
Use an electronic service tool and appropriate electronic service tool manual to monitor the vehicle speed, while the vehicle is not moving. If the monitor shows speed, check the sensor and circuit. Refer to Procedure 019-090, Procedure 019-091, and Procedure 019-093 in Section 19. |
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Clutch switch or circuit is malfunctioning |
Check the clutch switch adjustment, switch, and circuit. Refer to Procedure 019-009 or Procedure 019-010 in Section 19. |
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Engine brake on/off switch or circuit is malfunctioning |
Check the engine brake on/off switch and circuit. Refer to Procedure 019-034 and Procedure 019-035 in Section 19. |
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Vehicle brake switch or circuit is malfunctioning |
Check the vehicle brake switch and circuit. Refer to Procedure 019-088 and Procedure 019-089. |
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Cruise control/PTO on/off switch or circuit is malfunctioning |
Check the cruise control/PTO on/off switch and the circuit. Refer to Procedure 019-021 and Procedure 019-022 in Section 19. |
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Cruise control/PTO selector switch or circuit is malfunctioning |
Check the cruise control/PTO selector switch and circuit. Refer to Procedure 019-023 and Procedure 019-024 in Section 19. |
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