2007 ISUZU KB P190 Workshop Repair Manual

Page 1337 of 6020

ISUZU KB P190 2007  Workshop Repair Manual 6F – 4   EXHAUST SYSTEM 
   REMOVAL AND INSTALLATION 
  
 
  
 
 
 
 
RTW 46FLF000101 
 
Removal Steps 
 1. Rear hanger rubber 
  2. Silencer front nut  
  3. Exhaust silencer 
  4. Silencer hanger

Page 1338 of 6020

ISUZU KB P190 2007  Workshop Repair Manual EXHAUST SYSTEM   6F – 5 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Important Operations – Installation 
Follow the removal procedure in the reverse order to  
perfor

Page 1339 of 6020

ISUZU KB P190 2007  Workshop Repair Manual 6F – 6   EXHAUST SYSTEM 
 
  INSPECTION AND REPAIR 
Make the necessary adjustments, repairs, and part replacements if excessive wear or damage is discovered during  
inspection.  
 
 
 
 
 
 Front E

Page 1340 of 6020

ISUZU KB P190 2007  Workshop Repair Manual EXHAUST SYSTEM   6F – 7 
 
GENERAL DESCRIPTION 
This system controls the formation of NOx emission by recirculating the exhaust gas into the combustion chamber  
through the intake manifold. 
 
4JA1

Page 1341 of 6020

ISUZU KB P190 2007  Workshop Repair Manual 6F – 8   EXHAUST SYSTEM 
4JA1TC/4JH1TC  
The EGR system engine is controlled by ECM. Refer to “Engine driveability and emissions” section for detail.  
  
 
  
 
 
 
 
 
RTW 46ELF001101 
 
 
 
B

Page 1342 of 6020

ISUZU KB P190 2007  Workshop Repair Manual EXHAUST SYSTEM   6F – 9 
EGR SYSTEM DIAGRAM 4JA1T (L) 
  
 
  
 
 RTW 46AMF000301 
 
EGR System Operation 
Inspect EGR valve motion visually while changing engine RPM under no load condition after w

Page 1343 of 6020

ISUZU KB P190 2007  Workshop Repair Manual 6F – 10   EXHAUST SYSTEM 
4JA1TC/4JH1TC 
The EGR system engine is controlled by ECM. Refer to “Engine driveability and emissions” section for detail. 
  
   
RTW 46EMF000701 
 
BACK TO CHAPTER I

Page 1344 of 6020

ISUZU KB P190 2007  Workshop Repair Manual EXHAUST SYSTEM   6F – 11 
  INSPECTION 
4JA1T(L) 
 
  
 
 Vacuum switch valve (VSV) 
Use a circuit tester to measure the V.S.V. resistance.  
V.S.V Resistance  Ω at 20°C
37 ~ 44 
 
If the resista