Diagnostic Aids

Perform this test when instructed during QUICK TEST or if directed by other test procedures. This test is used to diagnose the following:

• Idle Air Control (IAC) Valve
• Wiring Harness Circuits (IAC & VPWR)
• Powertrain Control Module (PCM)

Fig 1: Identifying IAC Circuit & Connector Terminals (Models With 150-Pin PCM)

Courtesy of FORD MOTOR CO.

Fig 2: Identifying IAC Circuit & Connector Terminals (All Others)

Courtesy of FORD MOTOR CO.