Repair Procedures

Service Point Target Automatic Calibration (SPTAC)

This procedure describes how to calibrate the camera using the service tool. The technician aligns the vehicle to a well-lit simulated straight road target, preferably a wall. If the LDWS camera malfunctions, the diagnostic trouble code "System Out of Calibration" is set. Calibrate within the specified tolerances. The LDWS is supplied as a field replacement together with "System Calibration". The diagnostic trouble code "Required/Variant Coding Error" is set if a replacement part is supplied directly from the supplier's production.

1. 1
   Target Selection Guidelines. The following conditions are required to successfully complete the LDWS static calibration procedure:

   • The target surface (SST: 09890-3V100) must be perpendicular to the camera in both horizontal and vertical orientation to maintain a maximum roll of 1°.
   • The target must be attached to a rigid support material to maintain flatness.
   • The target must have reflective markings (not faded or poorly painted) to represent lane features.
   • Target size: 30 cm wide and 100 cm high.
   • The installation area must NOT have hatching or text markings near the target.
   • The target must be well lit for optimal operation when using non-flickering lighting. There must be no continuous shadow cast on the target.

   

2. 2
   Automatic Calibration Service Target Procedure

   1. It is recommended to check the vehicle wheel alignment and tire pressure levels to ensure correct camera alignment to the "world" before starting calibration. The vehicle for calibration must be under the nominal production load.
   2. The windshield must be clean and free of silkscreen so that there is no obstruction to the camera.
   3. The service technician connects the diagnostic connector and starts the vehicle. The camera module must not be activated by pressing the switch.
   4. The service calibration procedure may not work correctly if a system-level fault is active.
   5. When working with a replacement ECU: the service technician initiates the SPTAC reset configuration.
   6. The service technician aligns either the vehicle to the target or the target to the vehicle.

      a.	The lower edge of the target must be at a height of 90 ± 1 cm (35.4 ± 0.4 in.) from the ground and aligned horizontally with the camera lens axis.

      b.	Position of target (A) for short distance: 0 ± 5 cm (0 ± 2 in.) (B) in front of the front bumper.

      b.	Position of target (A) for long distance: 100 ± 5 cm (39.4 ± 2 in.) (B) in front of the front bumper.

   7. The technician must ensure correct target placement and check for the "OK" message on the Global Diagnostic System (GDS).
   8. Clear all DTCs.
   9. Turn the ignition OFF, then ON.

Road Test