Doosan 25/300, Электронное руководство по обслуживанию

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Book 22772784 (9/08/06) 63
TROUBLESHOOTING STEPS
Code 71
Action Result
Step 1:
Verify P1 harness connector pins 34, 35, and 1 are firmly seated into
The connector at the WEDGE controller.
Step 2:
Verify P2 harness connector pins 37, 46, and 36 for Cummins engine
are firmly seated into the connector at the engine electronic controller.
Step 3:
Setup the digital multimeter to read ohms. (Refer to the section in this
manual on how to use the multimeter). Disconnect P1 harness
connector from the WEDGE controller. If the engine is a Cummins,
disconnect the P2 harness connector from the engine controller.
Connect one of the multimeter test leads to P1-34 and the other test
Lead to P1-35.
Meter should read
approximately 60 ohms. If so,
go to Step 5. If not, go to Step
4.
Step 4:
If you did not get the results of Step 3, there is a problem with the wiring
harness. This problem could be a defective splice, broken wire or
defective wire connection at a pin. The CANH and CANL wires should
be tested for continuity from P1 to P2. The resistor stub outs should be
tested for continuity.
Make harness repairs as
necessary.
Step 5:
Setup the multimeter to read DC volts. (Refer to the section in this
manual on how to use the multimeter). The harness should be
connected to the engine controller and the WEDGE controller.
Turn the machine power to the “ON” position, but do not start the
engine. Using insulation piercing probes (I-R P/N 22216725),
connect the
red multimeter lead to P1-34 wire and connect the black
multimeter lead to the battery negative post or one of the brown wires
on the back of the control panel.