Isuzu N-Series. Service manual — part 291
HSA (HILL START AID) 5A5-43
0.5BR
0.3W/B
PARKING
BRAKE
HSA CONTROL UNIT
B-51
18
5
B-51
J-9
FRAME
P
ARKING BRAKE SWITCH
12
2
0.3W/V
0.3W/V
3
4
10
3
0.5W/B
0.3W/B
0.5W/B
0.5W/R
0.5B
0.5W/B
WITH
HBB
W/O
HBB
0.3W/R
B-285
8
H-5
H-5
RELAY ;
BUZZER
SHORT CONNECTOR
X-33
9
7
X-33
8
X-33
H-12
J-128
J-128
4
3
2
J-128
1
J-128
N-6
1
HBB
LEVEL
SWITCH
DIODE
BOX
0.5B
30
B-7
B-285
HEADLIGHT BRACKET (LH)
2B
3B
METER
N5A3031E
5A5-44 HSA (HILL START AID)
Symptom: HSA Indicator Lamp Does not Come On (HSA Does not Operate)
Step
Action
Value
YES
NO
1
Refer to “Symptom: HSA does not operate”.
Is this step completed?
—
—
HSA (HILL START AID) 5A5-45
Symptom: HSA Indicator Lamp Does not Come On (HSA Does Operate)
Step
Action
Value
YES
NO
1
Does the meter operate normally?
—
2
Is the HSA indicator lamp normal?
—
3
Is the fuse “F-16” normal?
—
4
Repair the open circuit between the fuse “F-
16” and 18 “B-51” (meter).
Is the repair completed?
—
5
Replace the fuse.
Is the repair completed?
—
6
Measure the battery voltage between the HSA
control unit connector terminal 12 “B-285” and
the body ground (with connector discon-
nected). Is the measurement completed?
20V or more
7
Replace the bulb.
Is the repair completed?
—
8
Replace the HSA control unit.
Is the repair completed?
—
9
Repair the open circuit between 2 “B-52”
(meter) and 12 “B-285”.
Is the repair completed?
—
10
After HSA repair, make sure no trouble is
found during self-diagnosis.
Is this step completed?
—
—
5A5-46 HSA (HILL START AID)
N5A3032E
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