- Symptom List

Strategy Based Diagnostics
1. Perform A Diagnostic System Check in Engine Controls before using the symptom tables, if applicable.
2. Review the system operations in order to familiarize yourself with the system functions.

All diagnosis on a vehicle should follow a logical process. Strategy based diagnostics is a uniform approach for repairing all systems. The diagnostic flow may always be used in order to resolve a system problem. The diagnostic flow is the place to start when repairs are necessary.

Visual/Physical Inspection
^ Inspect for aftermarket devices which could affect the operation of the Engine.
^ Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
^ Check for the correct oil level, proper oil viscosity, and correct filter application.
^ Verify the exact operating conditions under which the concern exists. Note factors such as engine RPM, ambient temperature, engine temperature, amount of engine warm-up time, and other specifics.
^ Compare the engine sounds, if applicable to a known good engine and make sure you are not trying to correct a normal condition.

Intermittent
Test the vehicle under the same conditions that the customer reported in order to verify the system is operating properly.

Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
^ Base Engine Misfire without Internal Engine Noises Base Engine Misfire Without Internal Engine Noises

^ Base Engine Misfire with Abnormal Internal Lower Engine Noise Base Engine Misfire With Abnormal Internal Lower Engine Noises

^ Base Engine Misfire with Abnormal Valve Train Noise Base Engine Misfire With Abnormal Valve Train Noise

^ Base Engine Misfire with Coolant Consumption Base Engine Misfire With Coolant Consumption

^ Base Engine Misfire with Excessive Oil Consumption Base Engine Misfire With Excessive Oil Consumption

^ Engine Compression Test Testing and Inspection

^ Engine Noise on Start-Up, but Only Lasting a Few Seconds Engine Noise on Start-Up, But Only Lasting A Few Seconds

^ Upper Engine Noise, Regardless of Engine Speed Upper Engine Noise Regardless of Engine Speed

^ Lower Engine Noise, Regardless of Engine Speed Lower Engine Noise Regardless of Engine Speed

^ Engine Noise Under Load Engine Noise Under Load

^ Engine Will Not Crank - Crankshaft Will Not Rotate Engine Will Not Crank - Crankshaft Will Not Rotate

^ Oil Consumption Diagnosis Oil Consumption Diagnosis

^ Oil Pressure Diagnosis and Testing Testing and Inspection

^ Oil Leak Diagnosis Oil Leak Diagnosis

^ Drive Belt Chirping Diagnosis Drive Belt Chirping

^ Drive Belt Squeal Diagnosis Drive Belt Squeal

^ Drive Belt Whine Diagnosis Drive Belt Whine

^ Drive Belt Rumbling Diagnosis Drive Belt Rumbling

^ Drive Belt Vibration Diagnosis Drive Belt Vibration

^ Drive Belt Falls Off Diagnosis Drive Belt Falls Off

^ Drive Belt Excessive Wear Diagnosis Drive Belt Excessive Wear

^ Drive Belt Tensioner Diagnosis Testing and Inspection