P1901

P1901
No Bus Data From DICE

Fault symptoms
No bus communication with DICE.

Condition
The following conditions are applicable:

Trionic:
^ Engine has started
^ No communication for 10 seconds

Diagnostic help
Some of the following symptoms may be observed:
^ Diagnostic trouble code P1921 or P1902 in the TCM.
^ Additional diagnostic trouble codes in Trionic (P1902, P1623 or P1622).
^ A/C not working.
^ Radiator fan runs continuously or not at all (coolant may boil).
^ Radio does not work.
^ Engine fails to start.
^ Direction indicators do not work.
^ Interior lighting does not work.
^ Intermittent wiper operation does not work.






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.