The following service article apply for 1993 Jeep ZJ Grand Cherokee’s ignition system faults and troubleshooting. This article discuss ignition system operation, components identification and location, diagnostic procedures and jeep zj grand cherokee ignition system schematics adjustments, removal and installation of ignition system components, maintenance, service and repair procedures as well as technical specification of ZJ Grand Cherokee 1993. The article is divided into sections as follows:

Component Identification/System Operation, contains detail information about Automatic Shut Down (ASD) , Camshaft and Crankshaft Position , Distributors, Engine Coolant Temperature , Ignition Coil, Intake Manifold Charge Air Temperature , Manifold Absolute Pressure (MAP) , Powertrain (PCM) and Throttle Position . To different ignition operating systems are used. One system is used on the 4.0L 6 cylinder engine. The other is used on the 5.2L V-8 engine. Similarities and differences between the two systems will be discussed here.

Diagnostic and Service Procedures, provides comprehensive basic ignition system diagnostics and service adjustments which covers Automatic Shut Down (ASD) , Camshaft and Crankshaft Position Test, Distributor Cap and Rotor, Engine Coolant Temperature Test, Ignition Secondary Circuit Diagnosis, Spark Plug Secondary Cables, etc.

Component Removal and Installation, covers procedures for removing and
installing the ignition system components. When removing the connector from , do not pull directly on wiring harness. Fabricate an L-shaped hook tool from
a coat hanger (approximately eight inches long). Place the hook part of tool under the connector for removal. The connector is snapped onto the . It is not
equipped with a lock type tab.

Find more information about 1993 Jeep ZJ Grand Cherokee Ignition System Faults and Troubleshooting here – 40 pages of PDF file docs. (source:

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