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Home >> Jeep >> 1993 >> Grand Cherokee Base, 5.2 Y, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - 2.5L & 4.0L >> Introduction

Engine Controls - System/Component Tests - 2.5L & 4.0L: Introduction

NOTE: For Grand Cherokee with 5.2L engine, see I - 5.2L SYS/COMP TESTS article in this section.

Before testing separate components or systems, perform procedures in F - 2.5L & 4.0L BASIC TESTING article in this section. Since many computer-controlled and monitored components set a trouble code if they malfunction, also perform procedures in G - 2.5L & 4.0L TESTS W/ CODES article in this section.

NOTE: Testing individual components does not isolate possible short or open circuits. Unless stated otherwise in test procedure, perform all voltage tests with a Digital Volt-Ohmmeter (DVOM) having a minimum 10-megohm input impedance. Use ohmmeter to isolate wiring harness short or open circuits.
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