Auto-Deceleration Function Does Not Operate Or Is Not Canceled While Lever Is Operated - Komatsu PC88MR-10 Shop Manual

40 Troubleshooting
Troubleshooting of electrical system (E-mode)
E-22 Auto-deceleration function does not operate or is not canceled
while lever is operated

Auto-deceleration function does not operate or is not canceled while lever is operated.

Failure
Since set engine speed for auto-deceleration is 1,175 rpm, auto-deceleration is not
Related
actuated or canceled if engine speed set with fuel control dial is below this speed.
information
No. Cause
Defective PPC oil
1
pressure signal
40-410
(PC88MR-FPM-400-A-Z0-A)
Procedure, measuring location, criteria, and remarks
a Start engine and perform troubleshooting (with monitoring function).
a If display of monitor is incorrect, perform troubleshooting for "E-42 to 53
Monitoring function does not display *** properly".
Monitoring
code
01900
Monitoring
display
Monitoring
code
01901
Monitoring
code
01902
When lever is operated:
ON
Swing
When lever is in neutral:
OFF
When lever is operated:
ON
Travel
When lever is in neutral:
OFF
When lever is operated:
ON
Boom LOWER
When lever is in neutral:
OFF
When lever is operated:
ON
Boom RAISE
When lever is in neutral:
OFF
When lever is operated:
ON
Arm IN
When lever is in neutral:
OFF
When lever is operated:
ON
Arm OUT
When lever is in neutral:
OFF
When lever is operated:
ON
Bucket CURL
When lever is in neutral:
OFF
When lever is operated:
ON
Bucket DUMP
When lever is in neutral:
OFF
When lever is operated:
ON
Blade RAISE
When lever is in neutral:
OFF
When lever is operated:
ON
Blade LOWER
When lever is in neutral:
OFF
When lever is operated:
ON
Boom swing left
When lever is in neutral:
OFF
When lever is operated:
ON
Boom swing right
When lever is in neutral:
OFF
PC88MR-10