Page 388 - Foton Workshop Manual - Tunland (AT)
P. 388
04-242 DIAGNOSTICS - ENGINE CONTROL SYSTEM
P1938，P1938，P1941，P2198-ECU POWER OUTPUT VOLTAGE
FAULT
P1938-ECU POWER OUTPUT VOLTAGE 1 - DATA IS VALID BUT
BELOW NORMAL OPERATING RANGE - MEDIUM SEVERITY
04 LEVEL
P1939-ECU POWER OUTPUT VOLTAGE 1 - VOLTAGE IS ABOVE
NORMAL OR SHORTED TO HIGH VOLTAGE POWER SUPPLY
P1941-ECUECU POWER OUTPUT VOLTAGE 1 - VOLTAGE IS
BELOW NORMAL OR SHORTED TO LOW VOLTAGE POWER
SUPPLY
P2198-VARIABLE GEOMETRY TURBOCHARGER ACTUATOR
DRIVE CIRCUIT - ROOT CAUSE UNKNOWN
Description
1 . The variable geometry turbocharge is powered by variable geometry turbocharger
actuator.The variable geometry turbocharger actuator is an intelligent device
that receives the information transmitted by the main engine control module
(ECM) via the J1939 data communication interface.The variable geometry
turbocharger performs autonomous diagnosis and reports failure to the main
engine ECM using the J1939 data communication interface.
Circuit Diagram
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