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40 Troubleshooting
Troubleshooting of electrical system (E-mode)
E-52 Blade RAISE ON is not displayed correctly with monitoring
function
(PC88MR-HBS-400-A-Z0-A)
Blade RAISE is not displayed correctly with monitoring function.
Failure
Monitoring code: 01901 Pressure Switch 2
Use "short socket adapter": 799-601-7230 for 2-pin X connector in test for cause 6.
Related
As pump controller connector uses "socket-type box" T-adapter, operating voltage cannot
information
be measured at pump controller connector.
No.
Cause
Defective blade raise
PPC oil pressure switch
1
(internal open or short
circuit)
Defective harness or
2
pump controller
Open circuit in wiring
harness (wire breakage
3
or defective contact of
connector)
Ground fault in wiring
harness (contact with
4
ground circuit)
Hot short circuit in
5
wiring harness
Pump controller is
6
defective.
40-448
Procedure, measuring location, criteria, and remarks
1. Turn starting switch to OFF position.
2. Disconnect connector P12, and connect T-adapter to male side.
3. Start engine.
4. Operate blade control lever and perform troubleshooting.
Between P12 (male) (1)
Resistance
and (2)
1. Turn starting switch to OFF position.
2. Insert T-adapter into connector P12.
3. Start engine.
4. Operate blade control lever and perform troubleshooting.
Voltage
Between P12 (2) and (1)
a If no failure is found by check on cause 2, this check is not required.
1. Turn starting switch to OFF position.
2. Disconnect connectors CP01 and P12 and connect T-adapters to each
female side.
Between CP01 (female) (55) and P12 (female) (2)
Resistance
Between P12 (female) (1) and ground (T11)
a If no failure is found by check on cause 2, this check is not required.
1. Turn starting switch to OFF position.
2. Disconnect connectors CP01 and P12, and connect T-adapter to either
female side.
Between ground and CP01 (female) (55) or P12
Resistance
(female) (2)
a If no failure is found by check on cause 2, this check is not required.
1. Turn starting switch to OFF position.
2. Disconnect connector P12, and connect T-adapter to female side.
3. Turn starting switch to ON position.
Voltage
Between P12 (female) (2) and ground
1. Turn starting switch to OFF position.
2. Disconnect connector P12, and connect T-adapter to female side.
3. Connect "short socket adapter" to female side of T-adapter.
4. Turn starting switch to ON position.
If voltage between P12 (2) and (1) is below 1 V but "Blade RAISE" is
displayed "OFF", pump controller is defective.
a After finishing test, restore connector.
Blade control lever:
NEUTRAL
Blade control lever:
Blade RAISE
Blade control lever:
NEUTRAL
Blade control lever:
Blade RAISE
Min. 1 Mz
Max. 1 z
Approxi-
mately 7 V
Max. 1 V
Max. 1 z
Max. 1 z
Min. 1 Mz
Approxi-
mately 7 V
PC88MR-10
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