Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 1492

6E2–419

RODEO 6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

DTC P1154 – HO2S Transition Time Ratio Bank 2 Sensor 1

  (Cont'd)

Step

No

Yes

Value(s)

Action

21

Replace Bank 2 HO2S 1.

Is the action complete?

—

Verify repair

—

22

Replace the PCM.

IMPORTANT: The replacement PCM must be
programmed.  Refer to 

On-Vehicle Service in

Powertrain Control Module and Sensors for
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?

—

Verify repair

—

6E2–420

RODEO 6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Diagnostic Trouble Code (DTC) 

P1167 Fuel System Rich During Decel Fuel Cut Off (Bank 1)

060R200054

Circuit Description

The powertrain control module (PCM) continuously
monitors the heated oxygen sensor (HO2S) activity for 90
seconds after “closed loop” has been enabled. During the
monitoring period the powertrain control module (PCM)
counts the number of times a rich to lean response is
indicated and adds the amount of time it look to complete
all rich to lean transitions and lean to rich transitions.
This code detects if Bank1 O2 sensor indicated rich
exhaust while in Decel Fuel Cut Off (DFCO) for fuel
control sensors.

Conditions for setting the DTC

D

No related DTCs.

D

The engine coolant temperature is more than 60 

°

C

(140 

°

F).

D

Engine is operating in “closed loop” power enrichment
mode for 3 seconds.

D

While in “power enrichment” mode the oxygen sensor
voltage remains more than 600mV in DFCO.

Action Taken When the DTC Sets

D

The PCM will not illuminate the malfunction
malfunction indicator lamp (MIL).

D

The PCM will store conditions which were present
when the DTC was set as Failure Records only. This
information will not be stored as Freeze Frame data.

Conditions for Clearing the MIL/DTC

D

A history DTC P1167 will clear after 40 consecutive trip
cycles during which the warm up cycles have occurred
without a fault.

D

DTC P1167 can be cleared using the Tech 2 “Clear
Info” function or by disconnecting the PCM battery
feed.

Diagnostic Aids

D

Check for faulty fuel injectors and fuel pump.

6E2–421

RODEO 6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Diagnostic Trouble Code (DTC) 

P1167 Fuel System Rich During Decel Fuel Cut Off (Bank1)

 

Step

Action

Value(s)

Yes

No

1

Was the “On-Board (OBD) System Check” performed?

—

Go to

 Step 2

Go to

 OBD

System

Check

2

Are any component related DTCs set?

Go to

component

DTC charts

Go to

 Step 3

3

1. Place the transmission in Park.
2. Using a Tech 2, HO2S 1 voltage while running warm

engine 75 

°

C – 95 

°

C (167 

°

F – 203 

°

F) at 1200

RPM.

3. HO2S 1 voltages should vary within the specified

range. (100 – 900mV)

4. Quickly open the wide open the throttle for a few

seconds.

Did the voltage suddenly rise toward the low end of the
specified range?

100 – 600 mV

Go to

 OBD

System

Check

Go to

 Step 4 

4

1. Disconnect the fuel pump relay and crank the

engine to relieve the fuel pressure.

2. Install the fuel pressure gauge.
3. Start the engine and idle at normal operating

temperature.

4. Disconnect the vacuum line going to the fuel

pressure regulator.

With the engine running, is the fuel pressure within the
specified range?

280 – 325Kpa

(41 – 46psi)

Go to

 OBD

System

Check

Go to

 Step 5

5

1. Ignition “OFF”.
2. Remove the fuel pump relay and replace it with a

fused jumper which will connect the relay’s battery
terminal to the terminal leading to the fuel pump
fuse.

3. While the fuel pump is operating, use pliers to slowly

close the return line (do not exceed the first
specified value).
Using the pliers to restrict the return line, can the
fuel pressure be manipulated to exceed the second
value?

Is the fuel pressure gauge reading near the specified
value?

325KPa

(46psi)

414KPa

(60psi)

Refer to

Diagnostic

Aids

Go to

 Step 6

6

Check the following items;

D

Faulty fuel pump

D

Incorrect fuel pump

D

Incorrect fuel being used

D

Cold fuel

If a problem is found, repair as necessary.

Was a problem found?

—

Verify repair

—

6E2–422

RODEO 6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Diagnostic Trouble Code (DTC) 

P1169 Fuel System Rich During Decel Fuel Cut Off (Bank 2)

060R200054

Circuit Description

The powertrain control module(PCM)
continuously monitors the heated oxygen sensor (HO2S)
activity for 90 seconds after “closed loop” has been
enabled. During the monitoring period the powertrain
control module (PCM) counts the number of times a rich
to lean response is indicated and adds the amount of time
it look to complete all rich to lean transitions and lean to
rich transitions.
This code detects if Bank2 sensor indicated rich exhaust
while in Decel Fuel Cut Off (DFCO) for fuel control
sensors.

Conditions for setting the DTC

D

No related DTCs.

D

The engine coolant temperature is more than 60 

°

C

(140 

°

F).

D

Engine is operating in “closed loop” power enrichment
mode for 3 seconds.

D

While in “power enrichment” mode the oxygen sensor
voltage remains more than 600mV in DFCO.

Action Taken When the DTC Sets

D

The PCM will not illuminate the malfunction
malfunction indicator lamp(MIL).

D

The PCM will store conditions which were present
when the DTC was set as Failure Records only. This
information will not be stored as Freeze Frame data.

Conditions for Clearing the MIL/DTC

D

A history DTC P1169 will clear after 40 consecutive trip
cycles during which the warm up cycles have occurred
without a fault.

D

DTC P1169 can be cleared using the Tech 2 “Clear
Info” function or by disconnecting the PCM battery
feed.

Diagnostic Aids

D

Check for faulty fuel injectors and fuel pump.

D

Check the pressure regulator.