Problem Symptoms Table
The suspected circuits or parts for each problem symptom are shown in the table below. Use this table to troubleshoot when, during a DTC check, a "Normal" code is displayed but the problem is still occurring. Numbers in the table show the inspection order in which the circuits or parts should be checked.
HINT:
In some cases, the problem is not detected by the diagnostic system even though a problem symptom is present. It is possible that the problem is occurring outside the detection range of the diagnostic system, or that the problem is occurring in a completely different system.
EXAMPLE OF PROBLEM SYMPTOM CHART
| Symptom | Suspect Area |
|---|---|
| Engine does not crank (Does not start) | 1. Starter & Starter relay |
| No initial combustion (Does not start) | 1. ECM power source circuit |
| 2. Fuel pump control circuit | |
| 3. Engine Control Module (ECM) | |
| No complete combustion (Does not start) | 1. Fuel pump control circuit |
| Engine cranks normally (Difficult to start) | 1. Starter signal circuit |
| 2. Fuel pump control circuit | |
| 3. Compression | |
| Cold engine (Difficult to start) | 1. Starter signal circuit |
| 2. Fuel pump control circuit | |
| Hot engine | 1. Starter signal circuit |
| 2. Fuel pump control circuit | |
| Low idle speed (Poor idle) | 1. A/C signal circuit (Compressor circuit) |
| 2. Fuel pump control circuit |