Test KE: Step 1

1) Code 12: Check For RPM Drop  On 1.9 PFI engine, Code 12 indicates that during KOER Self-Test, engine was unable to reach maximum self-test RPM.

On all other models, Code 12 indicates that during KOER Self-Test engine RPM could not be controlled within self-test upper RPM limit. Possible causes for this fault are:

• Open or shorted circuit
• Sticking or binding throttle linkage
• Incorrect idle adjustment
• Throttle body or ISC solenoid contaminated
• Faulty ISC solenoid
• Faulty ECA
• Non-ECC mechanical faults that could affect RPM

Turn key off. Connect engine tachometer and start engine. Disconnect Idle Speed Control (ISC) harness. If RPM drops or if engine stalls, go to next step. If not, go to step 3).