Ignition Switch Accessory Position Circuit
General electrical fault on the ignition switch accessory (terminal 75 / ACC) input. ACC tells the ECM that radio, fans, accessory loads should be powered without the engine running. With the input invalid, the body controller may misjudge accessory power timing.
Affected components
- Ignition switch
- Wiring harness
Common causes
- High likelihood: Open or shorted ACC wire
Diagnostic notes
- The malfunction indicator lamp may illuminate
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.