Eclipse V6-3.8L (6G75) (2006)
Part 2
FUNCTION
when diagnosing the CAN bus lines, the scan tool MB991958 measures the voltage of CAN_H and CAN_L line and detects the short to power supply or
ground.
TROUBLE JUDGEMENT CONDITIONS
The scan tool MB991958 judges the trouble when it is impossible to receive the periodically sent data and the voltage of CAN_H or CAN_L line is more
than 4.0 volts.
TROUBLESHOOTING HINTS
-
The wiring harness may be defective (CAN bus lines for a short to the power supply, combination meter, ABS-ECU <vehicles without traction
control system> or ABS/TCL-ECU <vehicles with traction control system>, or open circuit in the SRS-ECU ground line).
-
Short to power supply of the connector
-
Each ECU may be defective (short to power supply in the ECU)
DIAGNOSIS
Required Special Tools:
-
MB991223: Harness Set
-
MB992006: Extra Fine Probe
-
MB991958: Scan Tool (MUT-III Sub Assembly)
-
MB991824: Vehicle Communication Interface (V.C.I.)
-
MB991827: MUT-III USB Cable
-
MB991910: MUT-III Main Harness A
-
MB991970: ABS Check Harness
STEP 1. Check the CAN bus lines for a short to the power supply. Measure the voltage at data link connector C-125.