Isuzu KB P190. Manual — part 1438

9A1-70 RESTRAINT CONTROL SYSTEM

Step Action

Yes

No

8

1. Ignition switch is at “LOCK”.

2. Measure the resistance from the instrument meter cluster

harness connector "SRS" warning lamp circuit terminal to the
SRS control unit harness connector terminal “4”.

Is the resistance 5.0 ohms or less?

Go to Step 9

Replace the SRS

harness.

Go to Step 10

9

1. Disconnect the instrument meter cluster harness connector.

2. Measure the resistance from the "METER" fuse to the

instrument meter cluster harness connector "SRS" warning
lamp power supply circuit terminal.

Is the resistance 5.0 ohms or less?

Service instrument

meter cluster.

Install instrument

meter cluster.

Go to Step 10

Replace the "SRS"

warning lamp

power supply

circuit harness.

Go to Step 10

10

1. Reconnect all components and ensure all components are

properly mounted.

2. Clear the diagnostic trouble codes.
Is this step finished?

Go to the “SRS

Diagnostic System

Check”

―

RESTRAINT CONTROL SYSTEM 9A1-71

DTC B0062 (Flash Code 62) Battery Voltage Too High

RTW79ALF000301

Circuit Description

When the ignition switch is turned “ON", the SRS
control unit judge to "Ignition 1" voltage is normal or not.

DTC Will Set When

The "Ignition 1" voltage is above 21.4V.

Action Taken

The SRS control unit turns “ON” the “SRS” warning
lamp and sets a diagnostic trouble code.

DTC Will Clear When

The “Ignition 1" voltage comes to below 16.5V.

DTC Chart Test Description

Number(s) below refer to circled number(s) on the
diagnostic chart.
2. This test determines whether the SRS control unit is

malfunctioning.

9A1-72 RESTRAINT CONTROL SYSTEM

DTC B0062 (Flash Code 62) Battery Voltage Too High

Step Action

Yes

No

1

Was the “SRS Diagnostic System Check” performed?

Go to Step 2

Go to the “SRS

Diagnostic System

Check”

2

1. Ignition switch is at “LOCK”.

2. Disconnect the SRS control unit.

3. Ignition switch “ON”.

4. Measure voltage on SRS control unit harness connector from

terminal “1” to terminal “3” (ground).

Is voltage on terminal “1” below 16.5V?

Ignition switch is at

“LOCK”.

Replace the SRS

control unit.

Go to Step 3

Inspect the

Charging System.

Refer to the

"Engine Electrical"

section.

Go to Step 3

3

1. Reconnect all the components and ensure all components

are properly mounted.

2. Clear diagnostic trouble codes.
Is this step finished?

Go to the “SRS

Diagnostic system

Check”

―

RESTRAINT CONTROL SYSTEM 9A1-73

DTC B0063 (Flash Code 63) Battery Voltage Too Low

RTW79ALF000301

Circuit Description

When the ignition switch is turned “ON", the SRS
control unit judge to "Ignition 1" voltage is normal or not.

DTC Will Set When

The "Ignition 1" voltage is below 7.2V.

Action Taken

The SRS control unit turns “ON” the “SRS” warning
lamp and sets a diagnostic trouble code.

DTC Will Clear When

The “Ignition 1" voltage comes to above 10.6V.

DTC Chart Test Description

Number(s) below refer to circled number(s) on the
diagnostic chart.
4. This test determines whether the malfunction is in

the “Ignition 1” circuit.

5. This test determines whether the malfunction is in

the “Ignition 1” circuit.