2004 ISUZU TF SERIES Workshop Manual

oil additives fuse suspension 4WD instrument cluster USB port

Page 1561 of 4264

ISUZU TF SERIES 2004 Workshop Manual 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6E–189
Step Action Value(s) Yes No
11Is the ECM programmed with the latest software
release?

Page 1562 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E–190 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0243 (Symptom Code 5) (Flash Code 64)
Turbocharger Wastegate Solenoid "A" Range/Performance
Step Action Value(s) Ye

6E–190 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0243 (Symptom Code 5) (Flash Code 64)
Turbocharger Wastegate Solenoid "A" Range/Performance
Step Action Value(s) Yes No
1Was the "On-Board Diagnostic (OBD) System Check"
performed?
-Go to Step 2Go to On Board
Diagnostic
(OBD) System
Check
21. 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 P0243 (Symptom Code 5) stored as
"Present Failure"? - Go to Step 3Refer to
Diagnostic Aids
and Go to Step
3
31. 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
c l e a r t h e D T C i n f o r m a t i o n .
3. Operate the vehicle and monitor the "F0: Read
DTC Infor As Stored By ECU" in the "F0:
Diagnostic Trouble Codes".
Was the DTC P0243 (Symptom Code 5) stored in this
ignition cycle? - Go to Step 4Refer to
Diagnostic Aids
and Go to Step
4
4Visually check the vacuum regulating valve.
If a problem is found, repair as necessary.
Was the problem found? - Verify repair Go to Step 5
5Using the DVM and check the wastegate control
solenoid.
1 . I g n i t i o n " O f f " , e n g i n e " O f f " .
2. Disconnect the wastegate solenoid connector.
3. Measure the resistance of wastegate solenoid
coil.
Does the tester indicate standard resistance?
Approx imately
14.7 - 16.1
at 20C
Go to Step 8Go to Step 6
6Substitute a known good wastegate control solenoid
a n d re ch e c k.
Was the problem solved? - Go to Step 7Go to Step 8
7Replace the wastegate control solenoid.
Is the action complete? - Verify repair -
8Using the pressure gauge and check the turbocharger
wastegate valve operation for broken diaphragm.
If a problem is found, repair as necessary.
Was a problem found? - Go to Step 9Go to Step 10
9Replace the turbocharger wastegate valve .
Is the action complete? - Verify repair -
Wastegate Solenoid

Page 1563 of 4264

ISUZU TF SERIES 2004 Workshop Manual 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6E–191
Step Action Value(s) Yes No
10Check for poor/faulty connection at the vacuum
pressure sensor or ECM connector. If a poor/faulty
connection is found

Page 1564 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E–192 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0243 (Symptom Code 6) (Flash Code 64)
Turbocharger Wastegate Solenoid "A" Malfunction
Step Action Value(s) Yes No
1

Page 1565 of 4264

ISUZU TF SERIES 2004 Workshop Manual 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6E–193
Step Action Value(s) Yes No
9Using the DVM and check the MAF sensor signal
circuit.
1. Ignition "On", engine "Off".

Page 1566 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E–194 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0243 (Symptom Code 8) (Flash Code 64)
Turbocharger Wastegate Solenoid "A" High
Step Action Value(s) Yes No
1Was the

Page 1567 of 4264

ISUZU TF SERIES 2004 Workshop Manual 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6E–195
Step Action Value(s) Yes No
6Using the DVM and check the wastegate control
solenoid circuit.
1. Ig

Page 1568 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E–196 4JA1/4JH1 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

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