Symptom Diagnosis

When a diagnostic code cannot be confirmed or problem cannot be confirmed in appropriate article;

For GS300 BASIC TESTING

For SC300 BASIC TESTING

For SC400 BASIC TESTING

Find basic symptom. For example, vehicle engine will not start. Appropriate heading matching vehicle symptom is DOES NOT START. Listed under DOES NOT START are more specific conditions. Find specific condition which best describes vehicle malfunction. Perform checks in order given. DO NOT skip steps.

For GS300 TESTS W/CODES

For SC300 TESTS W/CODES

For SC400 TESTS W/CODES

This article includes trouble shooting for the following symptoms:

• Does Not Start
• Difficult To Start
• Poor Idling
• Poor Driveability
• Engine Stall