Symptom-Driven Diagnostics Index

Electrical Pretest ProceduresSymptomPage #
Power-up Sequence TestTransmission fails to power up at ignitionPower-Up Sequence
Isolation ProceduresSymptomPage #
Start Enable Relay Contact TestEngine cranking issues without any fault codesStart Enable Relay Contact Test
Brake Switch Functionality TestTransmission does not engage a gear from Neutral (N)Brake Switch Functionality Test
Transmission Shift Complaint TestShift complaint exists without any fault codesTransmission Shift Complaint
J1939 Vehicle Data Link TestNo J1939 communicationJ1939 Vehicle Data Link Test