Powertrain Management: Tools and Equipment

The system requires a data link connector read-out (Scan) tool, tachometer, test light, ohmmeter, digital voltmeter with 10 megohms impedance (J-39200), vacuum gage and jumper wires for diagnosis. A test light or voltmeter must be used when specified in the procedures. They must NOT be interchanged. For more complete information on the operation of these tools, see the manufacturer's instructions.






DIGITAL MULTIMETER: J-39200 OR EQUIVALENT

Voltmeter
Voltage position measures amount of voltage when connected in parallel to an existing circuit. A digital voltmeter with 10 megohm input impedance is used because this type of meter will not load down the circuit and result in faulty readings. Some circuits require accurate low voltage readings, and some circuits in the engine control module have a very high resistance.


Ammeter
When used as ammeter, this meter also accurately measures extremely low current flow. Refer to meter instructions for more information.

^ Selector must be set properly for both function and range. DC is used for most automotive measurements.

Ohmmeter
Measures resistance of circuit directly in ohms. Refer to meter instructions for more information.

^ OL Display in all ranges indicates open circuit.
^ Zero display in all ranges indicates a short circuit.
^ Intermittent connection in circuit may be indicated by digital reading that will not stabilize on circuit.

Range Switch
200 - Reads ohms directly
2K, 20K, 200K - Reads ohms in thousands 2M and 20M - Reads ohms in millions






VACUUM PUMP J-23738 (20 IN. HYDRAGYRUM MINIMUM)
Use gage to monitor manifold engine vacuum and the hand pump to check vacuum sensors, solenoids and valves.






UNPOWERED TEST LIGHT J-34142-A
Used to check wiring for complete circuit and short to ground or voltage.






TACHOMETER
Use inductive trigger signal pickup type to check revolution per minute.


MULTIPORT FUEL INJECTION (MFI) DIAGNOSTIC KIT J-34730-B
Used to diagnose MFI systems. The kit includes:

^ Fuel Pressure Gage - to check fuel pump pressure and compare injector pressure drop for equal fuel distribution.
^ Injector Test Light - to check electrical circuit to an injector.
^ Injector Test- to energize each fuel injector for a precise amount of time to perform injector balance test in CHART C-2A by checking each injector's pressure drop using pressure gage.






FUEL PRESSURE GAGE J-34730-B
Used to check and monitor fuel line pressure of port fuel system.


INJECTOR TEST LIGHT J-34730-B
Used to check electrical circuit to a port fuel injector.

INJECTOR TESTER J-34730-B
Used to energize each fuel injector for a precise amount of time to perform injector balance test in CHART C-2A by checking each injector's pressure drop using pressure gage.






SPARK TESTER J-26792
Use to check available secondary ignition voltage. Also called an ST125.






CONNECTOR TEST ADAPTER KIT J-35616
Used to make electrical test connections in current Weather Pack, Metri-Pack and Micro-Pack style terminals.






CIRCUIT TESTER J-34636
Used to check all relays and solenoids before connecting them to a new engine control module. Measures the circuit resistance and indicates pass or fail via green or red LED. Amber LED indicates current polarity. Can also be used as a non-powered continuity checker.






METRI-PACK TERMINAL REMOVER J-35689-A
Used to remove 150 series Metri-Pack "pull-to-seat" terminals from connectors.

Description:

IDLER AIR CONTROL (IAC) SYSTEM DRIVER J-37027-A
Used to test IAC motor for correct functioning and proper response to commands.

Description:

WEATHER PACK TERMINAL REMOVER J-28742-A
Used to remove Terminals from Weather Pack connectors.






ENGINE CONTROL MODULE CONNECTOR TERMINAL REMOVER J-33095
Used to remove terminal from Micro-Pack connectors.






INTAKE MANIFOLD DIAGNOSTIC PLATE J-39185
Used to fuel rail pressure test and fuel injector balance test.