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Component Tests and General Diagnostics|Page 2060 > < Component Tests and General Diagnostics|Page 2058
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Connectors

CIRCUIT OPERATION

The ETACS-ECU uses the input signals from the driver's and passengers door lock key cylinder switch to operate the following devices or functions.

TECHNICAL DESCRIPTION (COMMENT)

The driver's and passenger's door lock key cylinder switch input signals is used to operate the following devices or functions:

-

Central door locking system

-

Theft-alarm system

If the signal fails, these devices will not work normally.

TROUBLESHOOTING HINTS

-

Malfunction of the driver's or passenger's door lock key cylinder switch

-

Malfunction of the ETACS-ECU

-

Damaged harness wires or connectors

DIAGNOSIS

Required Special Tools:

-

MB91223: Test Harness Set

-

MB991502: Scan Tool (MUT-II)

-

MB991529: Diagnostic Trouble Code Check Harness

STEP 1. Check the location of malfunction.

Q: Which door key switch signal is not input? 

Driver's door: Go to Step 2.
Passenger's door: Go to Step 8.

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