STE/ICE Instructions

TM 9-2320-279-20-1

STE/ICE Instructions

2-16. SIMPLIFIED TEST EQUIPMENT FOR INTERNAL COMBUSTION ENGINES]

(STE/ICE) INTRODUCTION. This section of troubleshooting contains procedures for operating the

S T E / I C E : and troubleshoot M977 series vehicle's internal combustion engines and

associated fuel and electrical systems. The procedures cover vehicle serviceability testing and primary fault

isolation. This part of the troubleshooting section is applicable only if STE/ICE is available. If STE/ICE is

not available, go to paragraph 2-14, Table 2-7, System Symptom Index and Table 2-8, Troubleshooting

Subject Index.

STE/ICE Maintenance. Description, operation, and organizational maintenance of STE/ICE system

is covered in TM 9-4910-571-12&P.

6. STE/ICE Tests.

(1) STE/ICE Test Chain Index. The procedures are arranged in a GO chain (Table 2-10) and a

NO-GO chain (Table 2-11). In the GO chain, the satisfactory result (YES) from each test leads to a GO to

the next test. If vehicle fails the test in the GO chain, the unsatisfactory result leads to a corrective action,

higher level of maintenance, or to the NO-GO chain. The NO-GO chain contains procedures to determine

the cause of failure and is arranged in steps detailing fault isolation and corrective action.

(2) General Use of Test Chains. The condition of a test vehicle need not be known. The absence of

malfunctions would be quickly demonstrated by satisfactory passage (in sequence) of all tests in the GO

chain (fig. 2-17). A malfunctioning vehicle will fail one or more GO chain tests, resulting in fault isolation

and corrective action. The only symptoms needed to indicate STE/ICE testing are: 1) Engine won't start, 2)

Engine won't run right.

Table. 2-10. Engine GO Chain index (Combined Mode)

Test

Number

Test Title

VTM Connections and Checkout

GO1

GO2

First Peak Test - Starter Current

Engine Start - Lubrication Check

GO3

GO4

Charging Circuit and Battery Voltage Test

GO5

Engine Warmup/Coolant Check/Oil Pressure Test/Fuel

Filter Restriction Test

GO6

Governor Check/Power Test

GO7

Idle Speed/Governor Check

GO8

Compression Unbalance Test

Table. 2-11. Engine NO-GO Chain Index (Combined Mode)

NO-GO

Test

Number

Test Title

NG05

Low Oil Pressure Check

NG20

No Crank - No Start

NG30

Engine Crank- No Start

NG31

Gage Test

NG50

Charging Circuit Tests

NG80

Starter Circuit Tests

NG81

Battery Tests

NG90

Governor/Power Test Fault Isolation

Engine Tightness Test

NG130

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