Visual/Physical Check

NOTE: Use the connector test adapter kit J 35616-A for any test that requires probing the following items:

The PCM harness connectors
The electrical center fuse/relay cavities
The component terminals
The component harness connector

Using this kit will prevent damage caused by the improper probing of connector terminals.

Several of the symptom procedures call for a careful inspection. This can lead to correcting a condition without further tests and can save valuable time. This inspection should include the following areas:

Inspect the PCM grounds for being clean, tight, and in their proper location. Refer to Master Electrical Component List and Power and Grounding Component Views in Wiring Systems.
Inspect the vacuum hoses for splits, kinks, and proper connections, as shown on Vehicle Emission Control Information label. Inspect thoroughly for any type of leak or restriction. Refer to Emission Hose Routing Diagram .
Inspect the air intake ducts for being collapsed, damaged areas, looseness, improper installation, or leaking, especially between the mass air flow (MAF) sensor and the throttle body.
Inspect for air leaks at throttle body mounting area, MAF sensor and intake manifold sealing surfaces.
Inspect the wiring harness for poor connections, pinches, cuts, or other damage.
Inspect for loose, damaged, or missing sensors/components.

Use the following tables when diagnosing a symptom complaint: