2007 ISUZU KB P190 engine

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Page 1228 of 6020

ISUZU KB P190 2007  Workshop Repair Manual 6E-194  Engine Control System (4JH1) 
Step Action  Value(s) Yes No 
6  Observe the DTC Information with the scan tool. 
Are there any DTCs that you have not diagnosed?    Go to Diagnostic 
Trouble

Page 1229 of 6020

ISUZU KB P190 2007  Workshop Repair Manual Engine Control System (4JH1)  6E-195 
DTC P1120 (Symptom Code 9) (Flash Code 21) 
Circuit Description  
The accelerator pedal position (APP) sensor is mounted  
on the intake throttle assembly. The en

Page 1230 of 6020

ISUZU KB P190 2007  Workshop Repair Manual 6E-196  Engine Control System (4JH1) 
Step Action  Value(s) Yes No 
5  Replace the accelerator pedal position sensor. Refer 
to Accelerator Pedal Position Sensor Replacement  
in this section. 
Did yo

Page 1231 of 6020

ISUZU KB P190 2007  Workshop Repair Manual Engine Control System (4JH1)  6E-197 
DTC P1120 (Symptom Code D) (Flash Code 21) 
Circuit Description  
The accelerator pedal position (APP) sensor is mounted  
on the intake throttle assembly. The en

Page 1232 of 6020

ISUZU KB P190 2007  Workshop Repair Manual 6E-198  Engine Control System (4JH1) 
Step Action  Value(s) Yes No 
4  1. Check to ensure the brake pedal switch is 
adjusted correctly. The plunger should be all the  
way in when the pedal is releas

Page 1233 of 6020

ISUZU KB P190 2007  Workshop Repair Manual Engine Control System (4JH1)  6E-199 
Step Action  Value(s) Yes No 
11  Replace the accelerator pedal position sensor. Refer 
to Accelerator Pedal Position Sensor Replacement  
in this section. 
Did y

Page 1234 of 6020

ISUZU KB P190 2007  Workshop Repair Manual 6E-200  Engine Control System (4JH1) 
DTC P1120 (Symptom Code E) (Flash Code 21) 
Circuit Description  
The accelerator pedal position (APP) sensor is mounted  
on the intake throttle assembly. The en

Page 1235 of 6020

ISUZU KB P190 2007  Workshop Repair Manual Engine Control System (4JH1)  6E-201 
Step Action  Value(s) Yes No 
4  1.  Turn ON the ignition, with the engine OFF. 
2.  Connect a DMM between the signal circuit of the idle switch harness (pin 2 of