Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 830

6E–344

TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS

Diagnostic Trouble Code (DTC) P0562 System Voltage Low

D06R200017

Circuit Description

The powertrain control module (PCM) monitors the
system voltage on the ignition feed terminal to the PCM.
A system voltage DTC will set whenever the voltage is
below a calibrated value.

Conditions for Setting the DTC

D

Ignition “ON”.

D

System voltage is below 11.5 volts for 40 seconds.

Action Taken When the DTC Sets

D

The PCM will not illuminate the malfunction indicator
lamp (MIL).

D

The PCM will store as Failure Records conditions
which were present when the DTC was set.  This
information will not be stored as Freeze Frame data.

Conditions for Clearing the MIL/DTC

D

A history DTC P0562 will clear after 40 consecutive
warm-up cycles have occurred without a fault.

D

DTC P0562 can be cleared by using the Tech 2 “Clear
Info” function or by disconnecting the PCM battery
feed.

Diagnostic Aids

If the DTC sets when an accessory is operated, check for
a poor connection or excessive current draw.

6E–345

TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS

DTC P0562 – System Voltage Low

 

Step

Action

Value(s)

Yes

No

1

Was the “On-Board Diagnostic (OBD) System Check”
performed?

—

Go to 

Step 2

Go to 

OBD

System

Check

2

Using a DVM, measure the battery voltage at the
battery.

Is the battery voltage greater than the specified value?

11.5 V

Go to 

Step 3

Charge

battery, then

go to 

Step 3

3

1. Install a Tech 2.
2. Select “Ignition Volts” on the Tech 2.
3. Start the engine and raise the engine speed to the

specified value.

4. Load the electrical system by turning on the

headlights, high blower, etc.

Is the ignition voltage approximately equal to the
specified value?

2000 RPM

12.8-14.1 V

Go to 

Step 4

Go to

Starting/Char

ging

4

1. Ignition “OFF”.
2. Disconnect the PCM connector at the PCM.
3. Using a DVM, measure the battery voltage at the

PCM connector F-20 and F-57.

Is it approximately equal to battery voltage?

—

Go to 

Step 5

Go to 

Step 6

5

1. Check for faulty connections at the PCM harness

terminals.

2. Repair as necessary.

Was a repair necessary?

—

Verify repair

Go to 

Step 7

6

Check for an open battery feed circuit to the PCM.

Is the action complete?

—

Verify repair

Go to 

Step 7

7

Replace the PCM.

IMPORTANT: The replacement PCM must be
programmed.  Refer to 

On-Vehicle Service in

Powertrain Control Module and Sensors for
procedures.

And also refer to latest Service Bulletin.

Check to see if the Latest software is released or not.
And then Down Load the LATEST PROGRAMMED
SOFTWARE to the replacement PCM.

Is the action complete?

—

Verify repair

—

6E–346

TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS

Diagnostic Trouble Code (DTC) P0563 System Voltage High

D06R200017

Circuit Description

The powertrain control module (PCM) monitors the
system voltage on the ignition feed terminals to the PCM.
A system voltage DTC will set whenever the voltage is
above a calibrated value.

Conditions for Setting the DTC

D

Ignition “ON”.

D

System voltage is above 16 volts for 40 seconds.

Action Taken When the DTC Sets

D

The PCM will ON the MIL after second trip with
detected the fault.

D

The PCM will store conditions which were present
when the DTC was set as Freeze Frame and in the
Failure Records data.

Conditions for Clearing the MIL/DTC

D

A history DTC P0563 will clear after 40 consecutive
warm-up cycles have occurred without a fault.

D

DTC P0563 can be cleared by using the Tech 2 “Clear
Info” function or by disconnecting the PCM battery
feed.

Diagnostic Aids

If the DTC sets when an accessory is operated, check for
a poor connection or excessive current draw.

6E–347

TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS

DTC P0563 – System Voltage High

 

Step

Action

Value(s)

Yes

No

1

Was the “ON-Board Diagnostic (OBD) System Check”
performed?

—

Go to 

Step 2

Go to 

OBD

System

Check

2

Using a DVM, measure the battery voltage at the
battery.

Is the battery voltage less than the specified value?

11.5 V

Go to 

Step 3

Go to 

Step 4

3

1. Charge the battery and clean the battery terminals.
2. Clean the battery ground cable connection if

corrosion is indicated.

Is the battery voltage less than the specified value?

11.5 V

Replace

battery

Go to 

Step 4

4

1. Turn “OFF” all the accessories.
2. Install a Tech 2.
3. Select the ignition voltage parameter on the Tech 2.
4. Start the engine and raise the engine RPM to the

specified value.

Is the voltage more than 2.5 volts greater than the
measurement taken in step 2 or 3?

2000 RPM

Go to

Starting/

Charging

Go to 

Step 5

5

Replace the PCM.

IMPORTANT: The replacement PCM must be
programmed.  Refer to 

On-Vehicle Service in

Powertrain Control Module and Sensors for
procedures.

And also refer to latest Service Bulletin.

Check to see if the Latest software is released or not.
And then Down Load the LATEST PROGRAMMED
SOFTWARE to the replacement PCM.

Is the action complete?

—

Verify repair

—