Isuzu N-Series. Manual — part 287
HSA (HILL START AID) 5A5-27
DTC 33 Control Unit Fault
Step
Action
Value
YES
NO
1
Disconnect the connector of the HSA control
unit, and then reconnect it. When the trouble
code “33” appears again, replace the HSA
control unit.
Is the repair completed?
—
2
After HSA repair, make sure no trouble is
found during self-diagnosis.
Is this step completed?
—
—
5A5-28 HSA (HILL START AID)
DTC 36 Generator Terminal Output Does not Exist With the Clutch Engaged and Vehicle
Running
Step
Action
Value
YES
NO
1
Disconnect the HSA control unit connector “B-
285”, and start the engine. Is the voltage of
approx. 24V applied between the connector
terminal 10 “B-285” and the body ground?
Approx. 24V
2
Replace the HSA control unit.
Is the repair completed?
—
3
Repair the open circuit between the AC gen-
erator “L” terminal and 10 “B-285”.
Is the repair completed?
—
4
After HSA repair, make sure no trouble is
found during self-diagnosis.
Is this step completed?
—
—
N5A3025E
HSA (HILL START AID) 5A5-29
DTC 86 Clutch Switch Does not Turn ON With Clutch Pedal Depressed
Step
Action
Value
YES
NO
1
Is the clutch pedal play normal?
—
2
Is there improper connection or damage in the
clutch fluid pressure switch connector?
—
3
Adjust the clutch play.
Is the repair completed?
—
4
Measure the resistance of the clutch fluid
pressure switch (at the switch side connector)
(with the connector disconnected). Is the mea-
surement completed?
5
Ω or more
with clutch
pedal
released, less
than 5
Ω with
clutch pedal
depressed
5
Repair the connector.
Is the repair completed?
—
6
Measure the battery voltage between the
clutch fluid pressure switch connector terminal
1 “B-102” and the body ground (with connec-
tor disconnected). Is the measurement com-
pleted?
20 V or more
7
Replace the clutch fluid pressure switch.
Is the repair completed?
—
8
Measure the resistance between the clutch
fluid pressure switch connector terminal 2 “B-
102” and the HSA control unit connector ter-
minal 6 “B-285” (with connector discon-
nected). Is the measurement completed?
Less than 5
Ω
9
Repair the open circuit between the fuse “F-
17” and 1 “B-102”.
Is the repair completed?
—
10
Connect all the connectors, turn the starter
switch to ON, engage the clutch then disen-
gage the clutch for 5 seconds or more, and
engage the clutch for 1 minute. Does the trou-
ble code “86” appear again?
—
11
Repair the wire between 2 “B-102” and 6 “B-
285”.
Is the repair completed?
—
12
Replace the HSA control unit.
Is the repair completed?
—
13
After HSA repair, make sure no trouble is
found during self-diagnosis.
Is this step completed?
—
—
5A5-30 HSA (HILL START AID)
N5A3026E
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