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1991
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Allante V8-273 4.5L
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Sensors and Switches - Computers and Control Systems
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Vehicle Speed Sensor
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Testing and Inspection
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Component Tests and General Diagnostics
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Test A PCM Output Test (Table 1)
Test A PCM Output Test (Table 1)
Test A - Table 1:
Refer to table.
If voltages are correct, the PCM vehicle speed output to the IPC is OK. Replace the Instrument Panel Cluster (IPC) if the speedometer does not operate.