Isuzu N-Series. 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?

—

—

Go to Step1

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?

—

Go to Step2

Go to Step3

2

Is the HSA indicator lamp normal?

—

Go to Step6

Go to Step7

3

Is the fuse “F-16” normal?

—

Go to Step4

Go to Step5

4

Repair the open circuit between the fuse “F-
16” and 18 “B-51” (meter).

Is the repair completed?

—

Go to Step5

Go to Step4

5

Replace the fuse.

Is the repair completed?

—

Go to Step6

Go to Step5

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

Go to Step8

Go to Step9

7

Replace the bulb.

Is the repair completed?

—

Go to Step8

Go to Step7

8

Replace the HSA control unit.

Is the repair completed?

—

Go to Step10

Go to Step8

9

Repair the open circuit between 2 “B-52”
(meter) and 12 “B-285”.

Is the repair completed?

—

Go to Step10

Go to Step9

10

After HSA repair, make sure no trouble is
found during self-diagnosis.

Is this step completed?

—

—

Go to Step10

5A5-46 HSA (HILL START AID)

N5A3032E