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Home >> Mercedes Benz >> 1999 >> C280 >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Windows & Sun Roof System >> Functional Tests >> Test 17: Unlock Signal Verification
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Test 17: Unlock Signal Verification

Connect Hand-Held Tester (HHT) to Data Link Connector (DLC) located in engine bay. Monitor door control module readings. Point transmitter key at passenger's door handle and unlock vehicle. If YES is displayed on HHT, system is okay. If NO is displayed on HHT, perform TEST 3: RIGHT FRONT DOOR IR RECEIVER VOLTAGE SUPPLY  under SYSTEM TESTS. Transmitter key may not belong to this vehicle.