1. Visual Engine/Chassis Inspection

1. VISUAL ENGINE/CHASSIS INSPECTION

Purpose:
The purpose of this test is to check the general condition of the engine and look for obvious causes of a hard start or no start condition.

Visual Engine/Chassis Inspection

Fuel Oil Coolant Electrical Hoses Leaks:

NOTE: The camshaft position (CMP) sensor, crankshaft position (CKP) sensor and the powertrain control module (PCM) connectors are the most critical electronic sensors/actuators to inspect in no start situations.

- Verify there are no fluid or pressure leaks.
- Inspect all wire connections for damage.
- Inspect the manifold absolute pressure (MAP) sensor, intake air temperature 2 (IAT2) sensor, charge air cooler (CAC) and intake for leaks.

Recommended Procedure:
Inspect the fuel system, including the fuel tank and the fuel lines for kinks, bends and/or leakage. Inspect for coolant leaks at the radiator and the heater hoses and check the coolant level. Inspect the MAP sensor, IAT2 sensor, and the CAC for leaks. Inspect wiring for correct routing and make sure no rubbing or chafing has occurred. Inspect the engine harness, PCM, and sensor connectors to make sure they are completely seated and in good condition.

Possible Causes:
- Loose or leaking fuel supply lines cause the fuel system to lose its prime
- Kinked or blocked fuel supply lines
- Fuel leaks contribute to no start conditions
- Coolant leaks indicate engine problems
- Electronic connectors may be damaged or not properly installed causing a no start condition
- Leak around MAP sensor
- Leak around IAT2 sensor
- Restricted or open CAC hose

Tools Required:
Inspection light