Diagnostic Symptom Instructions - Begin Here
Diagnosis by SymptomThe Diagnosis by Symptom Index gives the technician diagnostic information, direction and suggests possible components, using a symptom as a starting point.
The Diagnosis by Symptom Index is divided into two categories: Electrical Routines, indicated by 200 series numbers, and Hydraulic/Mechanical Routines, indicated by 300 series numbers. The Electrical Routines list the possible electrical components that could cause or contribute to the symptom described. The Hydraulic/Mechanical Routines list the possible hydraulic or mechanical components that could cause or contribute to the symptom described.
Diagnosis by Symptom Chart - Directions
Diagnosis By Symptom Index:
Diagnosis By Symptom Index:
1. Using the Diagnosis by Symptom Index, select the Symptom/Concern that best describes the condition.
2. Turn to the Routine indicated in the Diagnosis by Symptom Index.
3. Always begin diagnosis of a symptom by using the following:
a. Preliminary inspections
b. Verification of condition
C. Check the fluid level
d. Perform other test procedures as directed
4. Then begin with the Electrical Routine, if indicated. Follow the reference or action required statements. Always perform the On-Board Diagnostic Tests as required. Never skip steps. Service as required. If the concern is still present after electrical diagnosis then proceed to the Hydraulic/Mechanical Routine listed.
CAUTION: Not all concerns and conditions with electrical components will set a Diagnostic Trouble Code (DTC). Be aware that the components listed may still be the cause. Verify proper function of those components prior to proceeding to the Hydraulic/Mechanical Routine listed.
5. The Hydraulic/Mechanical Routines list possible hydraulic or mechanical components that could cause the concern. These components are listed in the removal sequence and by most likely concern. All components listed must be inspected to ensure proper repair.