2004 ISUZU TF SERIES Workshop Manual

Page 2257 of 4264

ISUZU TF SERIES 2004  Workshop Manual 3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-261 
Step   Action  Value (s)  Yes  No 
8 
Repair the open or short to ground circuit between the 
ECM main relay and EGR valve.  
Is the action complete? 
-

Page 2258 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6E-262 3.5L ENGINE DRIVEABILITY AND EMISSIONS 
Step   Action  Value (s)  Yes  No 
10 
 Using the DVM and check the EGR valve solenoid 
signal circuit. 
1.  Ignition "Off", engine "Off".  
2.  Disconne

Page 2259 of 4264

ISUZU TF SERIES 2004  Workshop Manual 3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-263 
DIAGNOSTIC TROUBLE CODE (DTC) P0405 (FLASH CODE 32)  
EGR CIRCUIT LOW 
  
 
 
RUW46EMF000201 
 
Condition For Setting The DTC and Action Taken When The D

Page 2260 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6E-264 3.5L ENGINE DRIVEABILITY AND EMISSIONS 
Diagnostic Trouble Code (DTC) P0405 (Flash Code 32)  
EGR Circuit Low 
 
Step   Action  Value (s)  Yes  No 
1 
Was the "On-Board Diagnostic (OBD) System

Page 2261 of 4264

ISUZU TF SERIES 2004  Workshop Manual 3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-265 
Step   Action  Value (s)  Yes  No 
6 
 Using the DVM and check the EGR valve position 
sensor. 
1.  Ignition "Off", engine "Off".  
2.  Disconnect EGR va

Page 2262 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6E-266 3.5L ENGINE DRIVEABILITY AND EMISSIONS 
Step   Action  Value (s)  Yes  No 
9 
 
 Using the DVM and check the EGR valve position 
sensor signal circuit. 
Breaker box is available:  
1.  Ignition

Page 2263 of 4264

ISUZU TF SERIES 2004  Workshop Manual 3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-267 
Step   Action  Value (s)  Yes  No 
12 
Is the ECM programmed with the latest software 
release?  
If not, download the latest software to the ECM using

Page 2264 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6E-268 3.5L ENGINE DRIVEABILITY AND EMISSIONS 
DIAGNOSTIC TROUBLE CODE (DTC) P0406 (FLASH CODE 32)  
EGR CIRCUIT HIGH 
  
 
 
RUW46EMF000201 
 
Condition For Setting The DTC and Action Taken When The