Test Requirements
Ensure battery is okay. 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.
Test Procedure
1. Check Climate Control Module (J255) for DTC(s). See appropriate AUTOMATIC A/C-HEATER
SYSTEM article, under HVAC. If no DTCs are present, go to next step. If DTC(s) are present, repair as
necessary. After repairs, erase DTC memory. Verify repair. Test is complete. Perform ECM relearn
procedure. See TEST DRIVE RELEARN PROCEDURE .
2. Check wiring between Climate Control Module (J255) and ECM (J220) for open or short circuits. See
appropriate WIRING DIAGRAM under ENGINE PERFORMANCE in SYSTEM WIRING
DIAGRAMS. See Fig. 61 , Fig. 62 and Fig. 63 . If wiring is okay, go to next step. If wiring 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 .
3. If no DTCs are present, go to next step. If DTC(s) are present, repair as necessary. After repairs, erase
DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See TEST DRIVE
RELEARN PROCEDURE . Check centralized matching resistor in ECM. Turn ignition off. Connect
ECM to test box, leave ECM harness connector disconnected from test box. Connect Test Box (VAG
1598/31). See CONNECTING VAG TEST BOX . Using DVOM, check resistance between test box
sockets No. 58 and 60. Resistance should be 60-72 ohms. If resistance is not 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 P1690/18098, DTC P1691/18099, DTC P1692/18100 & DTC P1693/18101
NOTE:
Engine control module communicates with all control modules capable of
transferring data via a CAN (Controller Area Network) data bus. Data bus-
compatible control modules are connected together via two data bus wiring
twisted together (CAN high and CAN low) and exchange information
(messages). If information is not available in the CAN data bus from any one of
the control modules in the CAN data bus system it will be recognized as a
malfunction by the engine control module as well as other CAN data bus control
modules. The CAN data bus requires a matching resistor to function fault-free.
This central matching resistor is located in the engine control module.
NOTE:
Automatic A/C-Heater System is referred to by Volkswagen as the Climatronic
system and is a fully automatic climate control system.
NOTE:
Instrument Cluster Control Module (J285) and Can Data Bus OBD Interface
(J533) are integral parts of the instrument cluster. If instrument cluster is
replaced, Can Data Bus OBD Interface (J533) must be coded. See CAN DATA
BUS OBD INTERFACE (J533) CODING .
2003 Volkswagen New Beetle GLS
2002-2003 ENGINE PERFORMANCE Self-Diagnostics - 1.8L Turbo
Helpmelearn Repair Manuals
Wednesday, December 14, 2005 8:45:00 AM
Page 294
© 2004 Mitchell Repair Information Company, LLC.