ABS / Air Bag 2004 User Guide
Safety Precautions
Important:
•To avoid damaging the NGIS tool or generating false data, make sure the vehicle battery is fully charged and the connection to the vehicle DLC is clean and secure.
•Never disconnect or reconnect any electrical connector while the ignition is on. Damage to the ABS control unit may result.
•Do not hammer speed rings into the hub or tap on speed sensor components (sensor, sensor rings, etc.). Speed rings must be pressed, not hammered, into the hub and striking or tapping speed sensor components can cause demagnetization or a loss of polarization, affecting the accuracy of the
speed signal returning to the ABS control unit.
•Use the recommended
•When speed sensor components have been removed, be sure to check the
•Do not mix tire sizes. Increasing the width slightly is acceptable but rolling diameter must be identical for all tires. Some manufacturers recommend tires of the same brand, style, and type. Failure to follow this precaution may cause inaccurate wheel speed readings.
•Do not expose the ABS control unit to prolonged periods of high heat: 185 degrees F/85 degrees C for 2 hours is considered a maximum limit.
•Use a recommended brake fluid, do not use silicone brake fluids in an
•Before bleeding the brake system, make sure no diagnostic codes are present.
•Do not let the master cylinder run dry during the brake bleeding procedure.
•Do not allow brake fluid to contact the motor pack or the electrical connectors.
VW Problems:
•Be aware of the following issue regarding year 2000 and 2001 VW Golf, GTI, Jetta/Bora, and Beetle air bag controllers:
•There are reports of Air bag warning lights staying on permanently after scanning with a scan tool. The Air bag controller shows DTC number 65535, indicating an internal error which cannot be cleared. This problem seems to be limited to air bag controllers with the part number