Diagnostic Item 11

DIAGNOSTIC ITEM 11: Diagnose when the scan tool cannot receive the data sent by ABS-ECU or ABS/TCL-ECU .

CAUTION: When servicing a CAN bus line, ground yourself by touching a metal object such as an unpainted water pipe. If you fail to do so, a component connected to the CAN bus line may be damaged.

FUNCTION
The diagnostic result demonstrates that "the scan tool cannot receive the sent data from ABS-ECU or ABS/TCL-ECU " when the scan tool MB991958 checks the periodically sent data from each ECU and cannot receive ABS-ECU or ABS/TCL-ECU data only.

TROUBLE JUDGEMENT CONDITIONS
Scan tool MB991958 judges the trouble when the periodically sent data from ABS-ECU or ABS/TCL-ECU cannot be received and sent.

TROUBLESHOOTING HINTS
- The wiring harness may be defective [open circuit between ABS-ECU or ABS/TCL-ECU and joint connector (3) ]
- The connector may be defective [poor connection of joint connector (3) or ABS-ECU or ABS/TCL-ECU connector]
- Power supply circuit malfunction of ABS-ECU or ABS/TCL-ECU
- The ABS-ECU or ABS/TCL-ECU may be defective (internal open circuit)
- The ABS-ECU or ABS/TCL-ECU may be defective

DIAGNOSIS
Diagnose the ABS system. Refer to ABS - ABS diagnosis.