EDI DIAGNOSIS SERVICE MANUAL NUMBER 22
Page 5E-44 90-860074--1 FEBRUARY 2002
Microcontroller Fault
Scan Code: P1615
Blink Code: 1311
Malfunction Indicator Lamp: OFF
75343
CIRCUIT DESCRIPTION:
As part of self-diagnosis the ECM is capable of determining if failures have occurred to
circuits within the ECM. If defects exists the ECM sets this code.
DIAGNOSTIC HELP:
Verify the following:
• Replace the ECM.
Recognition by the ECM of Microprocessor Fault influences engine performance as follows:
• No loss of power.
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