System Operation
- Ensure engine is at normal operating temperature. Ensure idle speed is 650-750 RPM. Ensure transmission is in Neutral. Turn A/C off. Connect Fused Jumper Wire (09843-18020) between terminals TE1 and E1 of DLC No. 1 located at front of air intake chamber. See Fig 1. DLC No. 1 is located right of intake air chamber.
- Engine speed should increase to about 1000 RPM for about 5 seconds then return to idle (650-750 RPM). If engine speed is as specified, go to AIR ASSIST SYSTEM . If engine speed is not as specified, disconnect jumper wire from DLC No. 1. Check IAC valve operation. Replace IAC valve as necessary. If IAC valve is okay, check for open or short in IAC valve wiring. See appropriate wiring diagram in
WIRING DIAGRAMS article. Repair wiring as necessary. If wiring is okay, replace ECM.
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