INTRODUCTION TO LOGIC TREE TROUBLESHOOTING (CONT)

TM 10-3930-673-34

2-6. INTRODUCTION TO LOGIC TREE TROUBLESHOOTING (CONT)

(d) Isolate the system where the malfunction occurs, then locate the defective component within

the system.

(e) Use the test instruments specified to help you isolate the problem.

2-7. GENERAL TROUBLESHOOTING INSTRUCTIONS

NOTE

The troubleshooting makes use of the Simplified Test Equipment for Internal

Combustion Engines-Reprogrammable (STE/ICE-R) and conventional methods for

testing and fault isolation.

a. Simplified Test Equipment for Internal Combustion Engines - Reprogrammable (STE/ICE-R). STE/

ICE-R tests are incorporated into the standard troubleshooting test to aid in fault isolation. The STE/ICE-R

acts as a conventional digital multimeter to measure voltage, current, and resistance. It can also measure

pressure, speed, compression unbalance, engine power, and some specialized battery and starter evaluations.

The STE/ICE-R is powered by the forklift battery. The complete system includes a test meter (VTM), cables,

transit case, and technical publications. The STE/ICE-R can make TK mode measurements while connected

to the batteries. STE/ICE-R tests are referenced.

b. General Electrical Troubleshooting Procedures.

WARNING

Remove rings, bracelets, wristwatches, neck chains, etc., before working on any vehicle.

Jewelry can catch on equipment and cause injury, or may short across an electrical

circuit and cause severe burns or electrical shock.

CAUTION

Use proper sized test leads when checking for resistance, continuity, or voltage at

connectors or damage to equipment can result.

NOTE

The piece of electrical test equipment used will be referred to as the "multimeter." The

multimeter's red test lead will be referred to as the "positive (+) multimeter lead." The

multimeter's black test lead will be referred to as the "negative () multimeter lead."

If your multimeter does not operate in the way described in the following steps, learn

how it operates before performing troubleshooting.

Multimeter leads must remain in contact with the circuit being tested for a minimum

of three seconds to obtain a reading.

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