Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Instruction - page 37

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

6E–143

Circuit Description

The ECM is calculates an injection quantity and an
injection timing using the various sensors (crankshaft
position sensor, camshaft position sensor, engine
coolant temperature sensor, etc.). The timing control
valve (TCV) operation performs an injection timing
decision.
The TCV performs as a variable throttle, using the rapid
opening and closing cycle of the valve needle in the
TCV.
The TCV is assembled in the injection pump. The signal
of desired injection timing and actual injection timing are
exchanged via the CAN-bus between the PSG and
ECM.
If the timer position is out of tolerance (deviation or
fluctuation), DTC P0216 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.

• Insufficient air bleeding of fuel line.
Check for the following conditions:

• Insufficient air bleeding of fuel line inside, clogged

fuel filter or pinched fuel pipe/hose may cause the
DTC store or improper engine performance.

• 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 “Actual Injection Start” display on the Tech2 while
moving connectors and wiring harness related to the
sensor.

Diagnostic Trouble Code (DTC) P0216 (Symptom Code A) (Flash Code 54)

Injection Timing Control Circuit Malfunction (Timer Deviation)

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 P0216 (Symptom Code A) 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 P0216 (Symptom Code A) stored in this
ignition cycle?

Go to Step 4

Refer to

Diagnostic Aids

4

Replace the injection pump assembly.
Is the action complete?

Verify repair

6E–144

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

Diagnostic Trouble Code (DTC) P0216 (Symptom Code B) (Flash Code 54)

Injection Timing Control Circuit Malfunction (Timer Fluctuation)

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 P0216 (Symptom Code B) 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 P0216 (Symptom Code B) stored in this
ignition cycle?

Go to Step 4

Refer to

Diagnostic Aids

and Go to Step

4

4

Perform the air bleeding in the fuel line sufficiently.

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 P0216 (Symptom Code B) restored in
this ignition cycle?

Go to Step 5

Verify repair

5

Visually/physically inspect for the following conditions.

• Restrict fuel supply system. Check for a pinched

fuel hose/pipe.

• Check for a condition that causes fuel waxing or

icing, such as the customer is using an incorrect
fuel type in winter season or water mixed with the
fuel.

If a problem is found, repair as necessary.
Was a problem found?

Verify repair

Go to Step 6

6

Replace the fuel filter.
Was the problem solved?

Verify repair

Go to Step 7

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

6E–145

7

Remove the eye bolt with gauze filter from the
injection pump and check for the following conditions.

• Objects blocking at the gauze filter. Check for a

condition that causes contaminated fuel, such as
the customer is using an aftermarket fuel filter or
extended maintenance interval.

• Check for a condition that causes fuel waxing or

icing, such as the customer is using an incorrect
fuel type in winter season or water mixed with the
fuel.

If a problem is found, repair as necessary.
Was the problem found?

Replace the eye

bolt with gauze

filter and verify

repair

Go to Step 8

8

Replace the injection pump assembly.
Is the action complete?

Verify repair

Step

Action

Value(s)

Yes

No

6E–146

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

DIAGNOSTIC TROUBLE CODE (DTC) P0251 (SYMPTOM CODE 6)

(FLASH CODE 53) INJECTION PUMP MALFUNCTION

DIAGNOSTIC TROUBLE CODE (DTC) P0251 (SYMPTOM CODE 7)

(FLASH CODE 53) INJECTION PUMP MALFUNCTION

DIAGNOSTIC TROUBLE CODE (DTC) P0251 (SYMPTOM CODE 9)

(FLASH CODE 53) INJECTION PUMP MALFUNCTION

DIAGNOSTIC TROUBLE CODE (DTC) P0251 (SYMPTOM CODE A)

(FLASH CODE 53) INJECTION PUMP MALFUNCTION

DIAGNOSTIC TROUBLE CODE (DTC) P0251 (SYMPTOM CODE B)

(FLASH CODE 53) INJECTION PUMP MALFUNCTION

DIAGNOSTIC TROUBLE CODE (DTC) P0251 (SYMPTOM CODE D)

(FLASH CODE 53) INJECTION PUMP MALFUNCTION

DIAGNOSTIC TROUBLE CODE (DTC) P0251 (SYMPTOM CODE E)

(FLASH CODE 53) INJECTION PUMP MALFUNCTION

45

16 15 14 13 12 11 10 9

8 7 6 5 4 3 2 1

Battery
Voltage

Battery
Voltage

0.5
RED/
YEL

2.0
BLU/
RED

7

PSG(Pump Control Unit)

Injection
Pump

2

1

5

8

0.5
WHT

2.0
BLU/
RED

0.5
BLU/
BLK

0.5
RED

0.5
ORG

100

3

58

99

105

91

0.5
PNK

6

2.0
BLK

µP

CAN
Controller

Batt

Batt

IC

µP

0.5
BLU

Stop
Light
10A

1.25
BLK

µP

Engine
Control
Module
(ECM)

ECM
Main Relay

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