P1625
Read the instructions below then
start the fault diagnostic procedure.
Symptom: CHECK ENGINE.
Cruise control inoperative.
P-Bus Malfunction. No Bus Data From TC/ABS.
Fault symptoms
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•
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Cruise control inoperative.
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On-Board Diagnostics
Type of diagnosis:
Enable criteria:
Fault criteria:
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-
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BUS communication between ECM and ESP is down for more than 0.13 s.
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Dependents:
System reaction to a fault:
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-
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Cruise control not working.
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OK report:
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BUS communication between ECM and EPS is available for more than 4.2 s.
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Fault handling:
(See section
Fault handling III, other emissions-related components and functions
for more information)
Diagnostic help
The diagnosis concerns an electrical fault in bus communication between ECM and ESP.
Functions in the diagnostic tool related to the fault:
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-
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Read value:
Engine RPM (ECM),
Engine RPM (ESP)
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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.
