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• Do not exceed the limits shown in the table below: FUNCTION INPUT LIMIT Volts 0 - 500 peak volts AC Ohms (resistance)* 0 - 1.12 megohms Frequency Measured 0 - 10 kHz Temperature -58 - 1100°F * Ohms cannot be measured if voltage is present. Ohms can be measured only in a non-powered • Voltage between any terminal and ground must • Use caution when measuring voltage above 25v • The circuit being tested must be protected by a • Use the low current shunt to measure circuits up • When testing for the presence of voltage or cur- • When measuring current, connect the meter in • Disconnect the live test lead before disconnecting • When using the meter function, keep the t away from spark plug or coil wires to avoid measuring error from outside interference. 4.3 WARNINGS AND CAUTIONS 4.3.1 ROAD TEST WARNINGS Some complaints will require a test drive as part of the repair verification procedure. The purpose of CAUTION: BEFORE ROAD TESTING A VEHICLE, BE SURE THAT ALL COMPONENTS ARE REASSEMBLED. DURING THE TEST DRIVE, DO NOT TRY TO THE DRBIII T SCREEN WHILE IN MOTION. DO NOT HANG THE DRBIII T FROM THE REAR VIEW MIRROR OR OPERATE IT HAVE AN ASSISTANT AVAILABLE TO OPERATE THE DRBIII T . 4.3.2 VEHICLE DAMAGE CAUTIONS Before disconnecting any control module, make sure the ignition is “off”. Failure to do so could When testing voltage or continuity at any control module, use the terminal side (not the wire end) of Be careful when performing electrical tests so as to prevent accidental shorting of terminals. Such 5.0 REQUIRED TOOLS AND DRBIII t (diagnostic read-out box) scan tool fuel pressure adapter (C-6631) or #6539 with probe #6801 CAUTION: A 12 VOLT TEST LIGHT SHOULD BE USED FOR THE FOLLOWING CIRCUITS, DAMAGE TO THE POWERTRAIN • 5 Volt Supply • 8 Volt Supply • J1850 PCI Bus • CCD Bus • CKP Sensor Signal • CMP Sensor Signal • Vehicle Speed Sensor Signal • O2 Sensor Signal 13 GENERAL INFORMATION |