2004 ISUZU TF SERIES Workshop Manual

Page 2249 of 4264

ISUZU TF SERIES 2004  Workshop Manual 3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-253 
Step   Action  Value (s)  Yes  No 
7 
 
 Using the DVM and check the ignition coil signal 
circuit for the affected cylinder. 
Breaker box is available:

Page 2250 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6E-254 3.5L ENGINE DRIVEABILITY AND EMISSIONS 
Step   Action  Value (s)  Yes  No 
 
B9
Breaker Box No.6 cylinder

E-58


 
 
Breaker box is not available:  
1.  Ignition "Off", engine "Off".  
2. D

Page 2251 of 4264

ISUZU TF SERIES 2004  Workshop Manual 3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-255 
Step   Action  Value (s)  Yes  No 
 E-60(A)
E-56




No.4 Cylinder
 
E-60(A)
E-57



 No.5 Cylinder
 
E-60(A)
E-58




No.6 Cylinder
 - Repa

Page 2252 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6E-256 3.5L ENGINE DRIVEABILITY AND EMISSIONS 
Step   Action  Value (s)  Yes  No 
8 
 Using the DVM and check the ignition coil power 
supply circuit. 
1.  Ignition "On", engine "Off".  
2. Disconnect

Page 2253 of 4264

ISUZU TF SERIES 2004  Workshop Manual 3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-257 
Step   Action  Value (s)  Yes  No 
11 
Using the DVM and check the ignition coil ground 
circuit. 
1.  Ignition "Off", engine "Off".  
2. Disconnect the

Page 2254 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6E-258 3.5L ENGINE DRIVEABILITY AND EMISSIONS 
DIAGNOSTIC TROUBLE CODE (DTC) P0404 (FLASH CODE 32) EGR CIRCUIT 
RANGE/PERFOMANCE (OPEN VALVE) 
DIAGNOSTIC TROUBLE CODE (DTC) P1404 (FLASH CODE 32) EGR C

Page 2255 of 4264

ISUZU TF SERIES 2004  Workshop Manual 3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-259 
CIRCUIT DESCRIPTION 
The engine control module (ECM) monitors the EGR
valve pintle position input to ensure that the valve
responds properly to commands

Page 2256 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6E-260 3.5L ENGINE DRIVEABILITY AND EMISSIONS 
Step   Action  Value (s)  Yes  No 
4 
Check for poor/faulty connection at the EGR valve or 
ECM connector. If a poor/faulty connection is found, 
repair