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Test Requirements Ensure all fuses are okay, battery voltage is at least 11.5 volts and fuel pump relay is okay. Ensure all electrical Test Procedure 1. Connect Scan Tool . See RETRIEVING DIAGNOSTIC TROUBLE CODES . Go to next step. 2. Turn ignition on. Using scan tool, check IAT sensor temperature value. If IAT sensor temperature value deviates greatly from underhood ambient temperature, go to step 5 . If IAT sensor temperature value is 3. Turn ignition off. Disconnect IAT sensor harness connector. For IAT sensor location. See 4. Erase DTC memory. Test drive vehicle. If DTC P0112/16496 or DTC P0113/16497 returns, go to step 8 . If DTC P0112/16496 or DTC P0113/16497 does not return, test is complete. Perform ECM relearn 5. If IAT sensor temperature value is extremely low, approximately -50°F (-46°C), possible cause is open circuit or short to positive. Go to next step. If IAT sensor temperature value is extremely high, 6. Disconnect IAT sensor harness connector. For IAT sensor location. See COMPONENT LOCATIONS . Using a jumper wire, bridge IAT sensor harness connector terminals No. 1 and 2. Using scan tool, 7. Disconnect IAT sensor harness connector. For IAT sensor location. See COMPONENT LOCATIONS . Using scan tool, observe IAT sensor temperature value. If after disconnecting IAT sensor harness temperature of 67.1°F (19.5°C). For harness connector terminal wire colors, see NOTE: Engine must be cold before performing test procedure. NOTE: Next test step tests IAT sensor through its full range.
2003 Volkswagen New Beetle GLS 2002-2003 ENGINE PERFORMANCE Self-Diagnostics - 1.8L Turbo
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