Isuzu N-Series. Service manual — part 265
5A4-34 ABS/ASR
6
ASR lamp only comes on
when driving.
Normal if ASR off switch
has been operated.
If not, the ASR off switch
circuit is faulty.
Check the ASR off switch
itself, and the harness
between the ASR off
switch and the EHCU
connector terminal 5.
7
ASR lamp only blinks
when driving.
ASR is in operation. It is
normal.
No.
Lamp condition
Warning lamp illumination pattern
Diagnostic flow
N5A2034E
N5A2035E
ABS/ASR 5A4-35
ABS Warning Lamp does not Come on with the Starter Switch ON.
Check flow B-1-1
Step
Action
Value
YES
NO
1
Is the F-16 meter backup lamp fuse blown?
—
2
Is the warning lamp bulb blown?
—
3
1. Turn the starter switch OFF.
2. Disconnect the connector of the EHCU.
3. Turn the starter switch ON.
4. Measure the voltage between the B-51
connector terminal 18 and the J-177 con-
nector terminal 1,23.
Is the voltage within specified value?
16.5 — 34V
4
Check for continuity between the J-177 con-
nector terminal 1,23 and the body ground.
Is there continuity?
—
5
Replace the fuse.
Is this step completed?
—
—
6
Replace the warning lamp.
Is this step completed?
—
—
7
Repair the circuit for open/short circuit, and
the connector for improper connection.
Is this step completed?
—
—
8
Repair the circuit for open/short circuit, and
the connector for improper connection.
Is this step completed?
—
—
9
1. Check the suspicious circuit for improper
connection.
2. If the connection is normal, replace the
EHCU.
Is this step completed?
—
—
10
1. Install all the components, and check that
those are installed properly.
2. Clear the DTC.
Is this step completed?
—
Go to “Diagnostic
basic flow”.
—
5A4-36 ABS/ASR
ABS Warning Lamp Repeats Blinking After Turning the Starter Switch to ON.
Check flow B-1-2
Step
Action
Value
YES
NO
1
Is anything connected to the self-diagnosis
connector?
—
2
Disconnect the connection.
Is this step completed?
—
—
3
1. Turn the starter switch OFF.
2. Disconnect the connector of the EHCU.
Check for continuity between the J-177 con-
nector terminal 4 and the J-177 connector ter-
minal 1,23. Is there continuity?
—
4
Repair the circuit of the diagnosis connector
J-177 terminal 4 and the B-79 connector ter-
minal 12.
Is this step completed?
—
—
5
Is there any other trouble symptom?
—
Check according
to the check flow
of such symptom.
6
Replace the EHCU.
Is this step completed?
—
—
7
Install all the components, and check that
those are installed properly.
Is this step completed?
—
Go to “Diagnostic
basic flow”.
ABS/ASR 5A4-37
ABS Warning Lamp Repeats Blinking After Turning the Starter Switch to ON.
Check flow B-1-3
Step
Action
Value
YES
NO
1
Is anything connected to the self-diagnosis
connector?
—
2
Disconnect the connection.
Is this step completed?
—
—
3
1. Turn the starter switch OFF.
2. Disconnect the connector of the EHCU.
Is there continuity between the J-177 connec-
tor terminal 4 and the J-177 connector termi-
nal 1, 23?
—
4
Repair the circuit between the diagnosis con-
nector J-177 terminal 4 and the B-79 connec-
tor terminal 12.
Is this step completed?
—
—
5
Is there any other trouble symptom?
—
Check according
to the check flow
of such symptom.
6
Replace the EHCU.
Is this step completed?
—
—
7
Install all the components, and check that
those are installed properly.
Is this step completed?
—
Go to “Diagnostic
basic flow”.
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