Isuzu Trooper 1999 Workshop Manual page 1047

6E–246
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0175 – Fuel Trim System Rich Bank 2 (Cont'd)
Step
14 1. Perform the "Fuel System Pressure Test."
2. If Fuel System Pressure Test isolates a problem,
repair as necessary (refer to Engine Fuel or Fuel
Metering System ).
Did the Fuel System Pressure Test isolate a condition
requiring repair?
15 1. Ignition "ON," engine "OFF."
2. Connect a test light between the harness connector
terminals of canister purge solenoid.
Is the test light on?
16 Check for short to ground in the wire (red/blue)
between the canister purge solenoid and PCM terminal
A-15.
Was there a short to ground?
17 Repair the short to ground.
Is the action complete?
18 Replace the PCM.
IMPORTANT: The
programmed.
Powertrain Control
procedures.
And also refer to latest Service Bulletin.
Check to see if the Latest software is released or not.
And then Down Load the LATEST PROGRAMMED
SOFTWARE to the replacement PCM.
Is the action complete?
19 1. Perform the "Injector Balance Test."
2. If the Injector Balance Test isolates a problem,
repair as necessary (refer to Fuel Metering
System ).
Did the Injector Balance Test isolate a problem
requiring repair?
20 1. Remove and visually/physically inspect the Bank 2
HO2S 1 for silicon contamination. This will be
indicated by a powdery white deposit on the portion
of the HO2S that is exposed to the exhaust stream.
2. If contamination is evident on the Bank 2 HO2S 1,
replace the contaminated sensor.
Did the sensor require replacement?
21 1. Check the TP sensor mounting screws and tighten
or replace them as necessary if they are loose or
missing.
2. If the screws are OK, replace the TP sensor.
Is the action complete?
22 Replace the MAF sensor.
Is the action complete?
Action
replacement PCM
Refer to On-Vehicle Service in
Module and Sensors
Value(s)
—
—
—
—
must be
for
—
—
—
—
—
Yes No
Go to Step 15
Verify repair
Go to Step 16 Go to Step 19
Go to Step 17 Go to Step 18
Verify repair —
Verify repair —
Verify repair Go to Step 20
Refer to
Diagnostic
Aids
Verify repair
Verify repair —
Verify repair —