Capacity TJ5000 DOT - 4-5 DIAGNOSTICS

Capacity of Texas, Inc.
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4-5 D IAGNOSTICS
4-5.1 S YSTEM D IAGNOSTICS
The alphanumeric display on the speedometer (Figure 3-2) can
be used to display diagnostic codes from the engine control
unit (ECU). There are three diagnostic functions available:
• Driver-Initiated Diagnostics
• Manual Diagnostics
• Fault Display
4-5.2 D RIVER -I NITIATED D IAGNOSTICS
This function exercises all display modules automatically
when initiated. To initiate this function, perform the following
steps:
a. Stop vehicle and set parking brake.
b. Press the Mode button on the gauge until it displays
“DIAGTST”.
c. Press the Set button. The display will read “AUTO”
indicating it is in automatic diagnostic mode.
d. Press the Set button again to start the test. The gauges
will all move in unison to mid-scale, to full-scale, back to
mid-scale, and then back to zero. All indicator LEDs
(Figure 2-2) will flash and then turn on.
4-5.3 M ANUAL D IAGNOSTIC
This function is similar to the Driver-Initiated Diagnostic
mode, except the operator can select individual modules to
test. To initiate this function, perform the following steps:
a. Stop vehicle and set parking brake.
b. Press the Mode button on the gauge until it displays
“DIAGTST”.
c. Press the Set button twice, until the display reads
“MANUAL” indicating it is in manual mode.
d. Press the Mode button to cycle through the individual
modules to test. When the desired module’s name is dis-
played, press the Set button to start the test.