Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual — part 841
6E–388
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P1125 – ETC Limit Performance Model
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
1. Warming up the engine until the ECT rise at 80
°
C
2. Ignition “OFF”.
3. Ignition ON” but not engine run.
4. Observe the AP angle reading on the Tech 2 while
alowly opening the throttle.
Does the AP angle increase steadily and evenly from
the closed throttle value to the wide open throttle
value?
Closed
throttle APS1
= 11
∼
15%
APS2 =
85
∼
89%
APS3 =
85
∼
89% Wide
open throttle
APS1 =
85
∼
89%
APS2 =
11
∼
15%
APS3 =
32
∼
36%
Go to
Step 3
Go to
Step 4
3
Was the P1125 stored?
—
Go to
Step 8
Check the
procedure.
Refer to
Diagnostic
Aids
4
1. Connect a DVM between the 5 Voltge supply circuit
and the AP1, AP2 AND AP3 sensor ground circuit at
the AP sensor harness connector.
2. Observe the voltage using a DVM.
Is the voltage reading near the specified value?
5V
Go to
Step 5
Go to
Step 6
5
Check the following items;
1. AP1, AP2 or AP3 signal circuit for a short to voltage.
2. AP1, AP2 or AP3 sensor ground circuit for high
resistance between the PCM and the AP sensor.
3. AP1, AP2 or AP3 sensor ground circuit for a poor
connection.
4. If a problem is found, repair wiring harness as
necessary.
Was a problem found?
—
Verify repair
Go to
Step 6
6
Check the following items;
1. AP1, AP2 or AP3 signal circuit or 5 volge supply
circuit for a poor connection.
2. AP1, AP2 or AP3 signal circuit or 5 volge supply
circuit for high resistance between the PCM and the
AP1, AP2 or AP3 sensor.
3. If a problem is found, repair wiring harness as
necessary.
Was a problem found?
—
Verify repair
Go to
Step 7
6E–389
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P1125 – ETC Limit Performance Model
(Cont'd)
Step
No
Yes
Value(s)
Action
7
Replace the AP sensor.
Was a problem corrected?
—
Verify repair
Go to
Step 8
8
Replace the PCM.
IMPORTANT: The replacement PCM must be
programmed.Refer to
ON-Vehicle Service in Power
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 replasement PCM.
Is the action complete?
—
Verify repair
—
6E–390
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC)
P1133 HO2S Insufficient Switching Bank 1 Sensor 1
D06R200010
Circuit Description
The powertrain control module (PCM) monitors the
heated oxygen sensor (HO2S) activity for 90 seconds
after “closed loop” and stoichiometric operation have
been enabled. During this test period the PCM counts the
number of times that the HO2S signal voltage crosses the
rich-to-lean and lean-to-rich threshold. If the PCM
determines that the HO2S did not switch enough times,
DTC P1133 will be set.
A lean-to-rich switch is determined when the HO2S
voltage changes above and below 450 mV.
Heated oxygen sensors are used to minimize the amount
of time required for “closed loop” fuel control operation
and to allow accurate catalyst monitoring. The oxygen
sensor heater greatly decreases the amount of time
required for fuel control sensors Bank 1 HO2S 1 and Bank
2 HO2S 1 to become active. Oxygen sensor heaters are
required by post-catalyst monitor sensors to maintain a
sufficiently high temperature for accurate exhaust oxygen
content readings further from the engine.
Conditions for Setting the DTC
D
Engine coolant temperature (ECT) is above 60
°
C
(140
°
F).
D
Engine is operating in “closed loop”.
D
The engine has been running at least one minute.
D
Canister purge duty cycle is greater than 2%.
D
Engine speed is between 1500 RPM and 3000 RPM.
D
Mass air flow (MAF) is between 9 g/second and 42
g/second.
D
Above conditions are present for 3 seconds.
D
90 seconds after “closed loop” and stoichiometric
operation have been achieved, the PCM monitors the
oxygen sensor as it switches above and below 450 mV.
If fewer than 23 rich-to-lean and lean-to-rich switches
are detected, DTC P1133 will be set.
Action Taken When the DTC Sets
D
The PCM will illuminate the malfunction indicator lamp
(MIL) after the second consecutive trip in which the
fault is detected.
D
”Open loop” fuel control will be in effect.
D
The PCM will store conditions which were present
when the DTC was set as Freeze Frame and in the
Failure Records data.
Conditions for Clearing the MIL/DTC
D
The PCM will turn the MIL “OFF” on the third
consecutive trip cycle during which the diagnostic has
been run and the fault condition is no longer present.
D
A history DTC P1133 will clear after 40 consecutive
warm-up cycles have occurred without a fault.
D
DTC P1133 can be cleared by using Tech 2 “Clear Info”
function or by disconnecting the PCM battery feed.
6E–391
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Aids
A malfunction in the HO2S heater ignition feed or ground
circuit may cause a DTC P1133 to set. Check HO2S
heater circuitry for intermittent faults or poor connections.
If connections and wiring are OK and DTC P1133
continues to set, replace the Bank 1 HO2S 1.
Reviewing the Failure Records vehicle mileage since the
diagnostic test last failed may help to determine how often
the condition that caused the DTC to be set occurs. This
may assist in diagnosing the condition.
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart.
3. A condition that affects other heated oxygen sensors
indicates probable contamination. To avoid
damaging the replacement sensors, correct the
condition which caused the contamination before
replacing the affected sensors.
5. This step checks for conditions which may cause the
heated oxygen sensor to appear faulty. Correct any
of the described conditions if present.
11.To avoid damaging replacement sensors, correct the
condition which caused the contamination before
replacing the affected sensors.
DTC P1133 – HO2S Insufficient Switching Bank 1 Sensor 1
Step
Action
Value(s)
Yes
No
1
Was the “On-Board Diagnostic (OBD) System Check”
performed?
—
Go to
Step 2
Go to
OBD
System
Check
2
IMPORTANT: If any DTCs are set (except P1153 or
P1154) refer to those DTCs before proceeding with this
diagnostic chart.
1. Engine idling at operating temperature.
2. Operating the vehicle within parameters specified
under “Conditions for Setting the DTC” criteria
included in Diagnostic Support.
3. Using a Tech 2, monitor “DTC” info for DTC P1133
until the DTC P1133 test runs.
4. Note the test result.
Does the Tech 2 indicate DTC P1133 failed this
ignition?
—
Go to
Step 3
Check the
Procedure
Refer to
Diagnostic
Aids
3
Did the Tech 2 also indicate that the P1153 or P1154
tests failed?
—
Go to
Step 20
Go to
Step 4
4
Check for leaks at the exhaust pipe joints.
Are the joints leaking?
—
Go to
Step 5
Go to
Step 6
5
Tighten the bolt/nuts at the leaking joints.
Is your action complete?
—
Go to
Step 2
—
6
Check for gaskets that are damaged or improperly
installed.
Are there damaged or misaligned gaskets?
—
Go to
Step 7
Go to
Step 8
7
1. Replace the damaged gaskets.
2. Align the connections.
3. Tighten the connections.
Is your action complete?
—
Go to
Step 2
—
8
Check for loose exhaust flange connections.
Are the flange connections loose?
—
Go to
Step 9
Go to
Step 10
9
Tighten the stud nuts or bolts to specifications.
Is your action complete?
—
Go to
Step 2
—
10
Check for burned or corroded exhaust pipes.
Are the exhaust pipes burned or corroded?
—
Go to
Step 11
Go to
Step 12
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст