Hyundai HX140L, Manual

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5-39
J1939 Code Description Effect and Action
678-4
ECU 8 Volts DC Supply : Voltage
Below Normal The ECM detects the following conditions:
The 8 VDC supply is less than 7.2 VDC for more than one
second.
The ECM has been powered for more than 3 seconds.
Diagnostic code 168-4 is not active.
The ECM will log the diagnostic code and the warning lamp
will illuminate when this diagnostic code is active.
The engine may be limited to low idle.
An active diagnostic code may not cause any noticeable
effect on engine response unless the voltage drops below
6.5 VDC.
Digital Throttle Position Sensor Circuit - Test
723-8
Engine Speed Sensor #2 : Abnormal
Frequency, Pulse Width or Period The Electronic Control Module (ECM) detects the following
conditions.
A loss of signal from the secondary speed/timing sensor for
2 seconds while the signal from the primary speed/timing
sensor remained valid.
The engine has been running for more than 3 seconds.
3512 or 3483 diagnostic trouble codes are not active.
The warning lamp will come on and the diagnostic code will
be logged.
The loss of signal from the secondary speed/timing sensor
will prevent the engine from starting.
Engine Speed/Timing Sensor Circuit - Test
1075-5
Engine Electric Lift Pump For Engine
Fuel Supply : Current Below Normal The Electronic Control Module (ECM) detects the following
conditions:
There are no active 168 diagnostic codes.
The ECM is not attempting to power the relay.
The ECM has been powered for at least 2 seconds.
There is a low current condition in the EFLP relay circuit for
more than 2 seconds.
The warning light will come on.
The diagnostic code will be logged.
The ECM is unable to activate the relay for the EFLP. The
EFLP will not operate or the EFLP will operate all the time.
The engine will not operate.
Fuel Pump Relay Circuit - Test
1075-6
Engine Electric Lift Pump For Engine
Fuel Supply : Current Above Normal The ECM detects the following conditions:
There are no active 168 diagnostic codes.
The ECM is attempting to power the relay.
The ECM has been powered for at least 2 seconds.
There is a high current condition in the EFLP relay circuit
for more than 2 seconds.
The warning light will come on. The diagnostic code will be
logged.
The ECM is unable to activate the relay for the EFLP.
The EFLP will not operate or the EFLP will operate all the
time. The engine will not operate.
The ECM will continue to attempt to activate the relay. If the
current is OK for 6 seconds, then the diagnostic code will
be cleared.
Fuel Pump Relay Circuit - Test
侍#
Some fault codes are not applied to this machine.