P1908
Read the instructions below then
start the fault diagnostic procedure.
Symptom: No bus communication with MIU.
No Bus Data From MIU. See Fault Tracing 3:5 Bus and Diagnostic Communication.
Fault symptoms
No bus communication with MIU.
Condition
The following conditions are applicable:
Trionic:
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No communication for 3 seconds.
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Diagnostic help
Some of the following symptoms can
perhaps
be observed:
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Additional diagnostic trouble codes in the TCM (P1902 or P1923).
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Additional diagnostic trouble codes in the Trionic (P1901, P1902 or P1923).
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Cruise Control does not work.
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Radiator fan runs continuously.
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Main instrument unit's instruments and lighting not working.
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Checking the 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.
