How to Follow/Perform Trouble Diagnosis

NOTE:
Trouble diagnoses indicates work procedures required to diagnose problems effectively. Observe the following instructions before diagnosing.
1. Before performing trouble diagnoses, read the "Preliminary Check", the "Symptom Chart" or the "Work Flow".
2. After repairs, re-check that the problem has been completely eliminated.
3. Refer to Component Parts and Harness Connector Location for the Systems described in each section for identification/location of components and harness connectors.
4. Refer to the Circuit Diagram for quick pinpoint check. If you need to check circuit continuity between harness connectors in more detail, such as when a sub-harness is used
5. When checking circuit continuity, ignition switch should be "OFF".
6. Before checking voltage at connectors, check battery voltage.
7. After accomplishing the Diagnostic Procedures and Electrical Components Inspection, make sure that all harness connectors are reconnected as they were.






1. Work and diagnostic procedure
Start to diagnose a problem using procedures indicated in enclosed blocks, as shown in the diagram.
2. Measurement results
Required results are indicated in bold type in the corresponding block, as shown below:
These have the following meanings:
Battery voltage -> 11 - 14V or approximately 12V
Voltage: Approximately 0 V -> Less than 1 V
3. Cross reference of work symbols in the text and illustrations
Illustrations are provided as visual aids for work procedures. For example, symbol [A] indicated in the left upper portion of each illustration corresponds with the symbol in the flow chart for easy identification. More precisely, the procedure under the "CHECK POWER SUPPLY" outlined previously is indicated by illustration [A].
4. Symbols used in illustrations
Symbols included in illustrations refer to measurements or procedures. Before diagnosing a problem, familiarize yourself with each symbol.