Volvo TAD734GE, User Manual

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Fault codes
Code 2.5, SID 21/SPN 636
Engine rpm sensor, cam disc
Reason:
• No signal.
• Abnormal frequency.
• Fault in sensor.
Reaction:
• Engine takes longer to start than normal. Engine
runs normally when running.
Action:
• Check that the engine speed sensor connector is
correctly installed.
• Check that the engine rpm sensor cable is not
damaged.
• Check that the engine rpm sensor is correctly in-
stalled in the upper timing gear cover.
• Check engine rpm sensor function.
Code 2.6, PID/SPN 190. Engine speed
Reason:
• Engine rpm too high.
Reaction:
• None.
Action:
• After the engine has stopped, trace the reason for
the high rpm.
Code 2.8, PPID 132/SPN 608
Engine rpm potentiometer connected to CIU
Reason:
• Short circuit to positive (+) or negative (-).
• Fault in sensor.
Reaction:
• Engine drops to idle rpm.
• Rpm is “frozen”.
Action:
• Check that the potentiometer is correctly con-
nected.
• Check that the potentiometer cable is not dam-
aged.
• Check potentiometer function.
Code 2.9, PID/SPN 97
Indicator for water in fuel
Reason:
• Short circuit.
• Open circuit.
• Fault in indicator.
Reaction:
• None.
Action:
• Check the indicator cables for breaks and short
circuits.
• Check indicator function. Change indicator as nec-
essary.
Code 3.1, PID/SPN 100. Oil pressure sensor
Reason:
• Short circuit to positive (+) or negative (-).
• Open circuit.
Reaction:
• None.
Action:
• Check that the oil pressure sensor cable is not
damaged.
• Check that the oil pressure sensor is correctly
connected.
Code 3.2, PID/SPN 105
Charge air temperature sensor
Reason:
• Short circuit to positive (+) or negative (-).
• Open circuit.
Reaction:
• None.
Action:
• Check that the charge air temperature sensor con-
nector is correctly installed.
• Check that the charge air temperature sensor
cable is not damaged.
• Check that the charge air temperature sensor is
correctly installed.
• Check charge air temperature sensor function.