P1622
Read the instructions below then
start the fault diagnostic procedure.
Symptom: No bus communication with the MIU.
No Bus Data From MIU.
Fault symptoms
No bus communication with the MIU.
Conditions
The following conditions are applicable:
Trionic:
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•
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No communication for 10 seconds
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Diagnostic help
Some of the following symptoms
may
be observable:
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Additional DTCs in TCM (P1623)
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Additional DTCs in Trionic (P1623)
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Cruise control not working
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Radiator fan runs continuously
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MIU instrumentation and lighting not working
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Check wiring harness.
Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short-circuits in the leads. Observe the multimeter, test lamp or diagnostic tool during the test.
