P1921
Read the instructions below then
start the fault diagnostic procedure.
Symptom: No bus communication with the Trionic.
No Bus data From TRIONIC.
Fault symptoms
No bus communication with the Trionic.
Diagnostic help
Some of the following symptoms
may
be observable:
|
-
|
DTC (P1622 in Trionic, if Trionic cannot be contacted)
|
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.
