EP Equipment CQD16, Service Manual

Page: 131 / 251

REV. 07/2016
ELECTRICAL SYSYTEM
8
117
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Enter TESTER Menu through instrument
or handheld unit to check the status of the
switches:
“ENABLE SWITCH”. Press the accelerator
pedal, if the display does not change, it
indicates there is failure with the accelerator
pedal or its circuit; (see Section 8.12)
Turn off the vehicle to check the accelerator
pedal and its wiring harness. (See Figure
90516)
Provide a voltage of 12V between accelerator
pedal harness connectors (A) and (C), check
the voltage at each port of the wiring harness
with a multimeter;
Place the accelerator pedal at original
position Measure the voltage between the
interfaces with a multimeter.
as shown in the following table:
Testing
- Check if the accelerator pedal and its wiring
harness are in good condition, and if the
connectors are connected securely.
Accelerator pedal at original position
Connection
interface
Voltage Measurement
A-C 12 V
A-B 0 V
A-E 12 V
B-C 0 V
- Press the accelerator pedal. Measure
the voltage between the interfaces with a
multimeter.
as shown in the following table:
Press the accelerator pedal
Connection
interface
Voltage Measurement
A-C 12 V
A-B
Changing within the range of 0V
to 9V with the level of pressing
A-E 12 V
B-C 0 V
8.6.4 Control Circuit Troubleshooting
Accelerator Pedal Control Circuit
(Figure 90517)
Check if the circuit is broken by using a multi-
meter:
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- Set the multimeter to ON-OFF;
Check if #26/#34/#35/#36 circuit (circuit
between accelerator pedal and drive
controller) is conducted.