P1902
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Some of the following symptoms may be observed:
Further DTCs in Trionic (P1901, P1923 or P1908).
Further codes in TCM (P1921).
Engine will not start.
Cruise control not working.
Radio not working.
Central locking system not working.
Remote control not working.
No Bus Data From TWICE. See Fault Tracing 3:5 Bus and Diagnostic Communication.
Fault symptoms
Some of the following symptoms may be observed:
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Further DTCs in Trionic (P1901, P1923 or P1908).
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Further codes in TCM (P1921).
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Cruise control not working.
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Central locking system not working.
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Remote control not working.
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Conditions
The following conditions apply for this DTC:
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Engine running and no communication for longer than 10 sec.
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Diagnostic help
Fault diagnosis concerns an intermittent electrical fault in the power supply to the transmitting control module or any of the bus leads.
Checking the wiring
Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Observe the multimeter, diagnostic tool or test lamp during the check.
