Diagnostic Tests: Notes

CAUTION: Ensure to turn the ignition switch to OFF position and disconnect the negative battery cable before any repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc. will cause the MIL to illuminate. Ensure to route and secure wiring harnesses properly after repair and to connect and lock the connectors securely after work. A loose (unlocked) connector will cause the MIL to illuminate due to the open circuit. Ensure the connector is free from water, grease, dirt, bent terminals, etc. Certain systems and components, especially those related to OBD, may use a new style slide-locking type harness connector.

CAUTION: Perform all resistance and voltage tests using a Digital Volt-Ohmmeter (DVOM) with minimum 10-megohm impedance, unless stated otherwise in test procedures. Ensure ignition switch is in OFF position when performing resistance tests.

NOTE: For identification of circuits, terminals and wire colors referenced in the following testing, see referenced circuit diagrams and/or ENGINE PERFORMANCE in appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL.