1. ETACS-ECU Signal Cannot Be Checked With Scan Tool

CIRCUIT OPERATION
The ETACS-ECU signal is sent to the data link connector A trouble can be diagnosed by connecting the scan tool to the data link connector

TECHNICAL DESCRIPTION (COMMENT)
The cause may be a malfunction of the data link check circuit or of the scan tool

TROUBLESHOOTING HINTS
- Malfunction of the ETACS-ECU
- Malfunction of the scan tool
- Damaged harness wires or connectors

DIAGNOSIS
Required Special Tool
MB991502: Scan Tool (MUT-II)







STEP 1. Check the harness wire between data link connector C-23 and ETACS-ECU connector C-82.
1. Remove the instrument panel side cover [LH].
2. Check the harness wire between data link connector C-23 and ETACS-ECU connector C-82.
If any harness wire between data link connector C-23 and ETACS-ECU connector C-82 is damaged, repair it.
Then go to Step 2.
If the harness wires are not damaged, replace the ETACS-ECU or scan tool. Then go to Step 2.

STEP 2. Check symptoms
Confirm that the ETACS-ECU input signal can be checked using the scan tool.