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Ok, spending a few minutes, The check engine light switch would make perfect sense. California smog requires an operable and illuminated check engine light with various transmission and vehicle speed codes as allowed by Executive Order. Turning off the light would be a convivence feature, Identify this diagram with red/white wire going to pin 8 of connector B74 and pin 58 of ECM. This wire will be grounded for operation of bulb. Why the wire color change? switch should only open 1 circuit(there is probably a splice back to the same red/white wire). Also included 97 terminal Id charts. Richard Stratford ?
On Sunday, July 2, 2023 at 08:19:39 PM PDT, Richard W Stratford <daritysden@...> wrote:
OK guys, who cuts wires without knowing what is going on. As my first post, check the wiring diagram... Apparently that may not be available to all, so I attached a '97 Impreza ECU diagram. Andrew had very good point that got me back here. The '97 has both OBD11 and old school connectors. The harness has been compromised so if wire color doesn't work than pinout connectors to verify continuity. ECM part number verification is a good call.? Richard Stratford ?
On Sunday, July 2, 2023 at 07:20:23 PM PDT, Wayne Sitarz <wesitarz@...> wrote:
I second Brent's call. It's for the always on CEL. I just cut the wire and used my code reader or later my TorquePro.
Terminal Identification (Engine Control Module) - ALLDATA Repairc.pdf
Terminal Identification (Engine Control Module) - ALLDATA Repairc.pdf
Terminal Identification (Engine Control Module) - ALLDATA Repairb.pdf
Terminal Identification (Engine Control Module) - ALLDATA Repairb.pdf
Terminal Identification (Engine Control Module) - ALLDATA Repair.pdf
Terminal Identification (Engine Control Module) - ALLDATA Repair.pdf
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