Isuzu 4HL1, Workshop Manual

Page: 124 / 267

1A-122 Engine Control System
7
Check the PTO accelerator sensor circuit for
short.
1. Disconnect the VIM.
2. Disconnect the PTO accelerator sensor
connector.
3. At the VIM connector pins, measure the
resistance.
Was the resistance within range?
Pins 71-31:
∞ Ω
Pins 31-34:
∞ Ω
Pins 71-34:
∞ Ω
Go to Step 9 Go to Step 8
8
Repair or replace the faulty harness.
Is the action complete?
—
Verify repair and
go to Step 13 —
9
Check the PTO accelerator sensor.
1. Measure the resistance between each
sensor connector pin and ground (e.g.,
frame or body)
Was the resistance within range?
∞ Ω
Go to Step 11 Go to Step 10
10
Replace the PTO control lever (PTO
accelerator sensor).
Is the action complete?
—
Verify repair and
go to Step 13 —
11
Review the DTC.
1. Certainly connect the PTO accelerator
sensor and VIM connectors.
2. Using Tech 2, clear the DTC.
3. Perform test run and review the DTC.
Is DTC28 detected?
—
Go to Step 12
Refer to
Diagnostic Aids
12
1. Replace the VIM.
IMPORTANT:
If necessary (for the vehicle equipped with
idle stop function), input the number of
startups to the replacing VIM.
Is the action complete?
—
Verify repair and
go to Step 13 —
13
Check DTC28 will not be set again.
1. Using Tech 2, clear the DTC.
2. Perform test run and review the DTC.
Is DTC28 detected?
—
Refer to
Diagnostic Aids
and go to Step 2
Repair is
complete
Step Action Value(s) Yes No