go to next step. If voltage is not okay. Turn ignition off. Using DVOM check resistance of HO2S harness
connector terminal No. 3 to fuel pump relay (J17) harness connector, see appropriate WIRING
DIAGRAM under ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS. Resistance should
be a maximum of 1.5 ohms. Repair as necessary. After repairs, erase DTC memory. Verify repair. Test is
complete. Perform ECM relearn procedure. See TEST DRIVE RELEARN PROCEDURE .
6. Using DVOM and scan tool, check activation and voltage of heater circuit on HO2S. Connect DVOM
between terminals No. 3 and 4 of HO2S harness connector. See Fig. 21 . Reconnect scan tool. Start
engine and idle. Following scan tool manufacturer's instructions, use scan tool to check HO2S (G39)
heater activation. Observe scan tool in upstream HO2S heater circuit activation mode. Observe voltage on
DVOM. When scan tool shows heater circuit activation On, voltage should be 11.5-14.5 volts. When scan
tool shows heater circuit activation alternating from On to Off, voltage should alternate from 0-12 volts.
Turn ignition off. If voltage and/or activation is not okay, go to next step. If voltage and activation are
okay. Test is complete. Perform ECM relearn procedure. See TEST DRIVE RELEARN
PROCEDURE .
7.
Disconnect ECM harness connector, leave ECM disconnected from test box. Connect Test Box (VAG
1598/31) to ECM harness connector. See CONNECTING VAG TEST BOX . Using DVOM, check
resistance between HO2S harness connector No. 4 and test box socket No. 5. See Fig. 21 . Resistance
should be a maximum of 1.5 ohms. If resistance is not okay, repair as necessary. After repairs, erase DTC
memory. Verify repair. Test is complete. Perform ECM relearn procedure. See TEST DRIVE
RELEARN PROCEDURE . If resistance is okay, and all wiring is okay, replace faulty ECM. See
ENGINE CONTROL MODULE REMOVAL & INSTALLATION . After repairs, erase DTC
memory. Verify repair. Test is complete. Perform ECM relearn procedure. See TEST DRIVE
RELEARN PROCEDURE .
DTC P1114/17522: HO2 SENSOR (G130) DOWNSTREAM TWC - INTERNAL RESISTANCE TOO
HIGH
Test Requirements
Ensure all fuses are okay, battery voltage is at least 11.5 volts and fuel pump relay is okay. Ensure all electrical
accessories are off and A/C is off. Ensure engine is mechanically sound. Ensure no exhaust system leaks exist.
Ensure engine coolant temperature is at least 176°F (80°C).
Test Procedure
1. Check air induction and secondary air injection system for leaks. If no air leaks are found, go to next step.
NOTE:
Before replacing ECM check HO2S control signal. See DTC P0131/16515 &
DTC P0132/16516 . If HO2S signal is not within specifications it may set a
DTC for HO2S heater malfunction.
NOTE:
If a test ends with ECM replacement. Before replacing ECM be certain that, all
wiring, power and ground supplies are okay. See ENGINE PERFORMANCE in
SYSTEM WIRING DIAGRAMS article in ELECTRICAL and ECM GROUND &
VOLTAGE SUPPLY .
2003 Volkswagen New Beetle GLS
2002-2003 ENGINE PERFORMANCE Self-Diagnostics - 1.8L Turbo
Helpmelearn Repair Manuals
Wednesday, December 14, 2005 8:44:45 AM
Page 182
© 2004 Mitchell Repair Information Company, LLC.