Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 52

4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS

6E–203

or low, DTC P0560 (Symptom Code A) will be stored.

Diagnostic Aids

An intermittent may be caused by the following:

• Poor connections.

• Misrouted harness.

• Rubbed through wire insulation.

• Broken wire inside the insulation.
Check for the following conditions:

• Poor connection at ECM and PSG-Inspect harness

connectors for backed out terminals, improper
mating, broken locks, improperly formed or damaged
terminals, and poor terminal to wire connection.

• Damaged harness-Inspect the wiring harness for

damage. If the harness appears to be OK, observe
the  “System Voltage” display on the Tech2 while
moving connectors and wiring harness related to the
sensor.

Diagnostic Trouble Code (DTC) P0560 (Symptom Code 1) (Flash Code 35) 

System Voltage Too High

Step

Action

Value(s)

Yes

No

1

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

—

Go to Step 2

Go to On Board 

Diagnostic 

(OBD) System 

Check

2

1. Connect the Tech 2. 

2. Review and record the failure information. 

3. Select “F0: Read DTC Infor As Stored By ECU” in

“F0: Diagnostic Trouble Codes”. 

Is the DTC P0560 (Symptom Code 1) stored as
“Present Failure”?

—

Go to Step 3

Refer to 

Diagnostic Aids 

and Go to Step 

3

3

1. Using the Tech 2, ignition “On” and engine “Off”. 

2. Select  “F1: Clear DTC Information” in “F0:

Diagnostic Trouble Codes” with the Tech 2 and
clear the DTC information. 

3. Operate the vehicle and monitor the “F0: Read

DTC Infor As Stored By ECU” in the “F0:
Diagnostic Trouble Codes”. 

Was the DTC P0560 (Symptom Code 1) stored in this
ignition cycle?

—

Go to Step 4

Refer to 

Diagnostic Aids 

and Go to Step 

4

4

Was the battery jump start cable incorrectly
connecting?

—

Verify 

procedure

Go to Step 5

5

1.  Using the Tech 2, ignition “On” and engine “On”. 

2. Monitor the “System Voltage” in the data display. 

3. Load the electrical system by turning on the

headlights, etc.. 

Does the Tech 2 indicate correct ignition voltage?   

10 - 14V

Go to Step 6

Check the 

charging 

system

6

Is the ECM programmed with the latest software
release? 
If not, download the latest software to the ECM using
the “SPS (Service Programming System)”. 
Was the problem solved?

—

Verify repair

Go to Step 7

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4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS

7

Replace the ECM. 
Is the action complete? 
IMPORTANT: The replacement ECM must be
programmed. Refer to section of the Service
Programming System (SPS) in this manual. 
Following ECM programming, the immobiliser system
(if equipped) must be linked to the ECM. Refer to
section 11 “Immobiliser System-ECM replacement” for
the ECM/Immobiliser linking procedure.

—

Verify repair

—

Step

Action

Value(s)

Yes

No

4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS

6E–205

Diagnostic Trouble Code (DTC) P0560 (Symptom Code 2) (Flash Code 35) 

System Voltage Too Low

Step

Action

Value(s)

Yes

No

1

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

—

Go to Step 2

Go to On Board 

Diagnostic 

(OBD) System 

Check

2

1. Connect the Tech 2. 

2. Review and record the failure information. 

3. Select “F0: Read DTC Infor As Stored By ECU” in

“F0: Diagnostic Trouble Codes”. 

Is the DTC P0560 (Symptom Code 2) stored as
“Present Failure”?

—

Go to Step 3

Refer to 

Diagnostic Aids 

and Go to Step 

3

3

1. Using the Tech 2, ignition “On” and engine “Off”. 

2. Select  “F1: Clear DTC Information” in “F0:

Diagnostic Trouble Codes” with the Tech 2 and
clear the DTC information. 

3. Operate the vehicle and monitor the “F0: Read

DTC Infor As Stored By ECU” in the “F0:
Diagnostic Trouble Codes”. 

Was the DTC P0560 (Symptom Code 2) stored in this
ignition cycle?

—

Go to Step 4

Refer to 

Diagnostic Aids 

and Go to Step 

4

4

1.  Using the Tech 2, ignition “On” and engine “On”. 

2. Monitor the “System Voltage” in the data display. 

3. Load the electrical system by turning on the

headlights, etc.. 

Does the Tech 2 indicate enough ignition voltage?   

10 - 14V

Go to Step 6

Go to Step 5

5

Using the DVM and check the battery voltage at the
battery terminal. 
Does the tester indicate enough battery voltage? 

10 - 14V

Go to Step 6

Check the 

charging 

system, charge 

or replace the 

battery

6

Check for poor/faulty connection at the ECM
connector. If a poor/faulty connection is found, repair
as necessary. 
Was the problem found?

—

Verify repair

Go to Step 7

3

2

1

56

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4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS

7

Using the DVM and check the ECM main relay. 

1. Ignition “Off”, engine “Off”. 

2. Remove the ECM main relay from the relay box. 

3. Check the relay coil. 

Was the DVM indicated specified value?

Continuity

Go to Step 8

Replace ECM 

main relay and 

verify repair

8

Check for poor/faulty connection of the ECM ground at
the fender panel. If a poor/faulty connection is found,
repair as necessary. 
Was the problem found?

—

Verify repair

Go to Step 9

9

Is the ECM programmed with the latest software
release? 
If not, download the latest software to the ECM using
the “SPS (Service Programming System)”. 
Was the problem solved?

—

Verify repair

Go to Step 10

10

Replace the ECM. 
Is the action complete? 
IMPORTANT: The replacement ECM must be
programmed. Refer to section of the Service
Programming System (SPS) in this manual. 
Following ECM programming, the immobiliser system
(if equipped) must be linked to the ECM. Refer to
section 11 “Immobiliser System-ECM replacement” for
the ECM/Immobiliser linking procedure.

—

Verify repair

—

Step

Action

Value(s)

Yes

No

ECM Main Relay

3

5

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