Symptom Tree t036
Cause | Correction |
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Engine brake on/off switch is off |
Turn on the switch. |
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 Procedure 019-079 in Section 19. |
Electronic fault codes active or high counts of inactive fault codes |
Refer to Section TF for fault code troubleshooting. |
Engine brake on/off switch or circuit is malfunctioning |
Check the engine brake on/off switch and circuit. Refer to Procedures Procedure 019-034 and Procedure 019-035 in Section 19. |
Clutch switch or circuit is malfunctioning |
Check the clutch switch adjustment, switch, and circuit. Refer to Procedures Procedure 019-009, Procedure 019-010 in Section 19. |
Accelerator pedal or lever position sensor or circuit is malfunctioning |
Check for foot pedal restriction. Check the accelerator pedal or lever position sensor and circuit. Refer to Procedure Procedure 019-009 in Section 19. Procedure Refer to Procedure 019-010 in Section 19.. |
Service brake pressure switch or circuit is malfunctioning |
Check the service brake pressure switch and circuit. Refer to the OEM troubleshooting and repair manual. |
Engine electrical ground is malfunctioning |
Check engine ground to chassis and chassis ground to battery negative (-) post. Refer to the ISB Series 6.7L Engines (CM2100 and CM2150 Common Rail Fuel Systems) Service Manual, Bulletin 4021578, or the ISC and ISL Series Engines, (CM2150 Common Rail Fuel System) Service Manual, Bulletin 4021569. |
Lubricating oil leak (internal) |
Check the engine brake control valve and the engine brake piston. Refer to Procedures 020-017 and 020-019 in Section 20 in the ISB Series 6.7L Engines (CM2100 and CM2150 Common Rail Fuel Systems) Service Manual, Bulletin 4021578, or the ISC and ISL Series Engines, (CM2150 Common Rail Fuel System) Service Manual, Bulletin 4021569. |
Engine brake lubricating oil passage is restricted |
Check the engine brake assembly for restriction. Refer to Procedure 020-004 in the ISB Series 6.7L Engines (CM2100 and CM2150 Common Rail Fuel Systems) Service Manual, Bulletin 4021578, or the ISC and ISL Series Engines, (CM2150 Common Rail Fuel System) Service Manual, Bulletin 4021569. |
Engine brake adjustment is not correct |
Adjust the engine brakes. Refer to Procedure 020-004 in the ISB Series 6.7L Engines (CM2100 and CM2150 Common Rail Fuel Systems) Service Manual, Bulletin 4021578, or the ISC and ISL Series Engines, (CM2150 Common Rail Fuel System) Service Manual, Bulletin 4021569. |