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ELECTRICALS
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9.0 DIAGNOSTIC TROUBLE CODES FOR ENGINE MANAGEMENT SYSTEM:-
Sr.
No.
Displayed
DTC Code
DTC Description
Fault
cause
Probable trouble Area
1
U0001 - 8
High speed CAN
communication
bus - bus ‘OFF’.
Bus ‘OFF’ 1) Check loose connections.
2) Check connection between main and ESS ECU.
2
U0001 - 3
High speed CAN
communication
bus performance -
circuit open.
Circuit
open
1) Check loose connections.
2) Check connection between main and ESS ECU.
3
P0641 - C
Output voltage of
the sensor supply
1 is out of its
specified range -
circuit voltage out
of range.
Circuit
voltage
out
of
range
To be updated.
4
P0697 - C
Output voltage of
the sensor supply
3 is out of its
specified range -
circuit voltage out
of range.
Circuit
voltage
out
of
range
To be updated.
5
P2135 -
29
Throttle position
sensor "A" and
"B", signal not
plausible or both
throttle
position
sensors of DV−E
haven´t passed
test.
Signal
invalid
1) Loose/ Damaged connections or intermittent
fault.
2) Sensor supply line short circuit to battery/
ground.
3) Sensor signal line short circuit to battery/
ground.
4) Check the continuity from sensor connector pins
to the ECU pins.
5) Check for back out of pins at both sensor
connector and ECU connector.
6) Check for damage of pins at both sensor
connector and ECU connector.
7) Faulty ECU.
6
P0123 -
12
Throttle/pedal
position
sensor/switch "A"
circuit high.
Circuit
short to
battery
1) Loose/ damaged connections or intermittent
fault.
2) Sensor supply line short circuit to battery/
ground.
3) Sensor signal line short circuit to battery/ sensor
supply/ ground.
4) Check the continuity from sensor connector pins
to the ECU pins.
5) Check for back out of pins at both sensor
connector and ECU connector.
6) Check for damage of pins at both sensor
connector and ECU connector.
7) Faulty throttle position sensor.
8) Faulty ECU.