Contents Wiring diagrams Section: Testing & Diagnostics All sections

Engine Controls - Tests W/codes - Base Module: Other Mercedes-Benz S-class W140

Testing & Diagnostics 12 illustrations

SYSTEM TESTS

CAUTIONTo avoid damaging control modules all electrical testing should be done with a DVOM. DO NOT use an analog meter or test light to check control module circuits.

After verifying problem using DIAGNOSTIC TROUBLE CODE MEMORY (SECTION 11) under SELF-DIAGNOSTIC SYSTEM, perform appropriate test step(s). For aid in using diagnostic charts, see USING DIAGNOSTIC CHARTS .

PREPARATION FOR TESTS (SECTION 22)

  1. Turn ignition OFF.
  2. Disconnect socket box with contact module 1 and contact box.

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ELECTRICAL SYSTEM TESTS (SECTION 23)

Note. For aid in using diagnostic charts, see USING DIAGNOSTIC CHARTS .

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Scheme 146: Electrical System Test - Section 23 (Steps 1.0-3.0)

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Scheme 147: Electrical System Test - Section 23 (Steps 4.0-7.0)

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Scheme 148: Electrical System Test - Section 23 (Steps 8.0-10.0)

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Scheme 149: Electrical System Test - Section 23 (Steps 11.0-14.0)

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Scheme 150: Electrical System Test - Section 23 (Steps 15.0-18.0)

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Scheme 151: ELECTRICAL SYSTEM TESTS ILLUSTRATIONS (SECTION 23)

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