Page 364 - Understanding Automotive Electronics

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DIAGNOSTICS 10

Table 10.2
Temperature
Conversion Table
CODE ˚F
0 –40
8 –12
12 1
16 15
21 32
25 46
30 64
35 81
40 98
45 115
50 133
52 140
54 147
56 153
58 160
60 167
62 174
64 181
66 188
68 195
70 202
72 209
73 212
75 219

process of diagnosing a problem can be lengthy and can involve many steps.
However, without the aid of the on-board diagnostic capability of the electronic
control system, such diagnosis would take much more time and might, in
certain cases, be impossible.
On-board diagnosis has also been mandated by government regulation,
particularly if a vehicle failure could damage emission control systems. The
California Air Resources Board (CARB), which has been at the forefront of

UNDERSTANDING AUTOMOTIVE ELECTRONICS 351