P1902
Read the instructions below then
start the fault diagnostic procedure.
Symptom: No bus communication with the TWICE.
No Bus Data From TWICE. See Fault Tracing 3:5 Bus and Diagnostic Communication.
Fault symptoms
No bus communication with the TWICE.
Condition
The following conditions are applicable:
Trionic:
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No communication for 10 seconds
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TCM:
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The automatic transmission's input shaft speed exceeded 200 rpm once during the present drive cycle.
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No communication for 6 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 Trionic (P1901, P1923 or P1908).
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Additional diagnostic trouble code in the TCM (P1921)
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Cruise Control does not work.
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Central locking system does not work.
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Remote control does not work.
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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.
