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DTCs must be read before being erased. See RETRIEVING DIAGNOSTIC TROUBLE CODES TEST DRIVE RELEARN PROCEDURE 1. If ECM was disconnected during diagnostic procedure or diagnostic trouble codes have been cleared, go to next step. If ECM was not disconnected during diagnostic procedure and no codes are present. Perform 2. Turn ignition off. Remove test equipment. Reconnect ECM connector. Reconnect all remaining (disconnected) electrical connectors/components. Go to next step. 3. Turn ignition on for a minimum of 10 seconds. Turn ignition off. Perform a long road test. Coolant READINESS CODE Reading Readiness Code Read readiness code in display zone 2. Specified value X000XXXX. Read readiness code in display zone 4. Generating Readiness Code 1. After reconnecting ECM, it is necessary to perform relearn procedure, see TEST DRIVE RELEARN PROCEDURE . No DTCs stored. Engine coolant 50°F (10°C) minimum. 2. NOTE: When voltage supply to ECM is interrupted or diagnostic trouble codes have NOTE: Throttle Valve Control Module (J338) adapts to ECM (J220) automatically if NOTE: If test sequence is interrupted or not adhered to, readiness code will not
2003 Volkswagen New Beetle GLS 2002-2004 ENGINE PERFORMANCE Self-Diagnostics - 1.9L Turbo Diesel - Beetle, Golf & Jetta (Engine Code ALH)
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