Question about 1990 Mitsubishi Minivan

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The vehicle can not accelerate but engine running well. The check engine light on but on diagnosis with diagnose tool No DTC found

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Since there are no error codes it is possible that you must check the intensity of the spark and the fuel.
Check and see if the fuel is not contaminated, check the fuel filter.

Posted on Oct 06, 2010

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Why won't the car start with the new Crank shaft position sensor installed? 2005 Buick Lacrosse cxl 3.8l engine.

After replacing crank sensor Perform the crankshaft position system variation learn procedure. Refer to Crankshaft Position System Variation Learn !
No you don't need to replace the balancer !
Install a scan tool.
Monitor the powertrain control module (PCM) for DTCs with a scan tool. If other DTCs are set, except DTC P0315, refer to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information for the applicable DTC.
Select the crankshaft position variation learn procedure with a scan tool.
The scan tool instructs you to perform the following:
4.1. Accelerate to wide open throttle (WOT).
4.2. Release the throttle when fuel cut-off occurs.
4.3. Observe the fuel cut-off specifications for the applicable engine.
4.4. The engine should not accelerate beyond the calibrated RPM value.
4.5. Release the throttle immediately if the value is exceeded.
4.6. Block the drive wheels.
4.7. Set the parking brake.
4.8. DO NOT apply the brake pedal.
4.9. Cycle the ignition from OFF to ON.
4.10. Apply and hold the brake pedal.
4.11. Start and idle the engine.
4.12. Turn the A/C OFF.
4.13. The vehicle must remain in Park or Neutral.
4.14. The scan tool monitors certain component signals to determine if all the conditions are met to continue with the procedure. The scan tool only displays the condition that inhibits the procedure. The scan tool monitors the following components:
• Crankshaft position (CKP) sensors activity--If there is a CKP sensor condition, refer to the applicable DTC.
• Camshaft position (CMP) signal activity--If there is a CMP signal condition, refer to the applicable DTC.
• Engine coolant temperature (ECT)--If the engine coolant temperature is not warm enough, idle the engine until the engine coolant temperature reaches the correct temperature.
Enable the crankshaft position system variation learn procedure with the scan tool and perform the following:
Important: While the learn procedure is in progress, release the throttle immediately when the engine starts to decelerate. The engine control is returned to the operator and the engine responds to throttle position after the learn procedure is complete.
5.1. Accelerate to WOT.
5.2. Release when fuel cut-off occurs.
5.3. Test in progress.
The scan tool displays Learn Status: Learned this ignition. If the scan tool indicates that DTC P0315 ran and passed, the CKP variation learn procedure is complete. If the scan tool indicates DTC P0315 failed or did not run, refer to DTC P0315. If any other DTCs set, refer to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information for the applicable DTC.
Turn OFF the ignition for 30 seconds after the learn procedure is completed successfully.
The CKP system variation learn procedure is also required when the following service procedures have been performed, regardless of whether DTC P0315 is set.
• Engine replacement

Feb 07, 2017 | 2005 Buick LaCrosse

1 Answer

Engin manegment light on for emissioms depoulutions

Check engine light , engine emission light . If the light is on there is a DTC - diagnostic trouble code stored in the engine computer . It takes a tool called a scan tool to hook up to the vehicles computer to read the code . Then it needs to be diagnosed by a qualified repair professional . If you are unaware of this , your best bet is to take your vehicle to the dealer or someother qualified repair shop .

Dec 31, 2016 | Cars & Trucks

1 Answer

'98 Pontiac Grand Prix SE PO742 torque converter clutch solenoid circuit stuck on Trac off light and service engine soon light stay on

When the PCM detects 3 occurrences of TCC slip between -20 and +50 RPM for 5 seconds, indicating the TCC is applied, when commanded OFF, then DTC P0742 sets. DTC P0742 is a type B DTC.
The PCM energizes the Torque Converter Clutch Solenoid Valve Assembly (TCC Sol. Valve Assy.) by creating a ground path on circuit 422. When grounded (energized), the valve stops converter signal oil from exhausting. This causes converter signal oil pressure to increase and move the TCC apply valve. The TCC Sol. Valve Assy. de-energizes when the PCM no longer provides a ground path. When de-energized, the valve will exhaust fluid and release the TCC
Diagnostic Aids
Check for PRNDL DTC P0705. DTC P0705 affects transmission operation. This may set DTC P0742 falsely.

Inspect the transmission fluid for debris.

DTC P0742 Torque Converter Clutch System Stuck ON Step

Was the Powertrain On-Board Diagnostic (OBD) System Check performed?
Go to Step 2
Go to Powertrain On Board Diagnostic (OBD) System Check

Install the Scan Tool .
With the engine OFF, turn the ignition switch to the RUN position.
Important: Before clearing the DTCs, use the scan tool in order to record the Freeze Frame and Failure Records for reference. The Clear Info function will erase the data. Record the DTC Freeze Frame and Failure Records, then clear the DTC.
Start and run the vehicle.
Select TCC Slip Speed on the scan tool.
With the transmission in D4, drive the vehicle through the 1-2 upshift.
In second gear is the TCC Slip Speed within the range specified?
-20 to +50 RPM
Go to Step 3
Go to Diagnostic Aids

Inspect for the following conditions:
The TCC apply valve stuck ON because of sediment or damage.
The TCC Sol. Valve Assy. stuck ON because of sediment or damage. Refer to Control Valve Body Assembly Inspection, in Unit Repair.
Was a condition found and corrected?
Go to Step 4

In order to verify your repair, perform the following procedure:
Using the scan tool, clear DTCs.
Operate the vehicle under the following conditions:
• The gear range is D2, D3 or D4.
• The commanded gear is not 1st.
• The engine speed is greater than 500 RPM for 5 seconds.
• Not in fuel shut off.
• The engine torque is 95-270 N·m (70-200 lb ft).
• The throttle position is 14-50%.
• The PCM commands the TCC OFF.
• The TCC slip speed is 150-2000 RPM for 5 seconds.
• The engine speed is 800-4000 RPM.
• The vehicle speed is 32-112 km/h (20-70 mph).
• The speed ratio is 0.65-1.18.
• The last gear change occurred more than 3 seconds ago.
Select Specific DTC. Enter DTC P0742.
Has the test run and passed?
System OK
Begin the diagnosis again. Go to Step 1

Oct 07, 2015 | Pontiac Cars & Trucks

1 Answer

2009 Cadillac dts cracks but won't start

Cranks but won't start , cracks ! that's funny ,sorry ! Are there any lights lit on the dash , SECURITY etc.....
Engine Cranks But Does Not Run
Circuit/System Description
This Engine Cranks but Does Not Run is an organized approach to identify a condition which causes the engine to crank but not start. This diagnostic directs the technician to the appropriate system diagnosis.
This diagnostic assumes the system voltage levels are adequate for starter motor operation. Refer to Battery Inspection/Test , and Engine Cranks Slowly . Fuel level and fuel quality should be determined for correct diagnosis.
Special Tools ?€¢
CH-48027 Digital Pressure Gage

J 26792 HEI Spark Tester

Crank the engine for up to 30 seconds. Observe the Engine DTC information with a scan tool.
If any of the following DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle to diagnose those DTCs P0201-P0208, P0230, P0335, P0336, P0340, P0403, P0404, P0601, P0602, P0603, P0604, P0606, P0607, P060D, P062F, P0641, P0651, P0685, P0689, P0690, P1516, P2610.

Ignition OFF for 90 seconds, determine the current vehicle testing altitude. Ignition ON, observe the scan tool MAP Sensor parameter. Compare the parameter to the Altitude Versus Barometric Pressure table. The MAP sensor pressure parameter should be within the specified range indicated in the table.
If the reading is not correct for your altitude, diagnose the MAP sensor. Refer to DTC P0106 .

Install a J 26792 . Crank the engine for 15 seconds. Spark should be observed from the Spark Tester.
If spark is not observed refer to Electronic Ignition (EI) System Diagnosis .

Important: Additional DTCs may set when using the fuel pump output control.
Command the fuel pump ON and OFF. Fuel pump should energize when commanded ON and De-energize when commanded OFF
If the fuel pump does not respond refer to Fuel System Diagnosis .

Turn OFF the ignition. Install the CH-48027 . Turn ON the ignition and command the fuel pump ON while observing the CH-48027 . Refer to Fuel Pressure Gage Installation and Removal . The fuel pressure should be between 384-425 kPa (55-61 psi).
If the fuel pressure is not within 384-425 kPa (55-61 psi), refer to Fuel System Diagnosis .

Inspect for the following conditions:
Compare the actual engine coolant temperature to the ECT parameter.

Air filter and air intake system for restrictions and obstructions

Test the fuel for contamination. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .

Inspect the spark plugs. Refer to Spark Plug Inspection .

Test the exhaust system for restrictions. Refer to Restricted Exhaust .

Engine mechanical conditions such as worn timing chain gears, low compression, etc.--Refer to Engine Compression Test .

Sep 14, 2015 | Cadillac Cars & Trucks

1 Answer

Acadia 2009 code C0561 what does it mean?

You won't find this information in a Haynes manual ! I know , I work for a GMC dealership , along with Chevy and Cadillac ! this information I'm adding is right out of GMC service information .
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Review Strategy Based Diagnosis for an overview of the diagnostic approach.

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors
DTC C0561 71: System Disabled Information Stored Invalid Serial Data Received

DTC C0561 72: System Disabled Information Stored Alive Counter Incorrect

DTC C0561 74: System Disabled Information Value of Signal Protection Calculation Incorrect

Circuit/System Description
The electronic brake control module (EBCM) receives serial data messages from the body control module (BCM), engine control module (ECM), instrument panel cluster (IPC), and the transmission control module (TCM) which are needed to perform antilock brake system (ABS), vehicle stability enhancement system (VSES), or traction control system (TCS) functions.
Conditions for Running the DTC
Ignition voltage is greater than 10 volts.
Conditions for Setting the DTC
The EBCM receives an invalid serial data message from another module.
Action Taken When the DTC Sets
The EBCM disables the traction control system (TCS)/ vehicle stability enhancement system (VSES).

A DIC message and/or a warning indicator may be displayed.

Conditions for Clearing the DTC
The condition for the DTC is no longer present.

The EBCM clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids
This DTC indicates that there are no problems in the EBCM. The BCM, ECM, IPC and the TCM should be checked for a possible fault.
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference Component Connector End Views
Description and Operation ABS Description and Operation
Electrical Information Reference ?€¢
Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections

Wiring Repairs
Scan Tool Reference Control Module References for scan tool information
Circuit/System Verification

  1. With a scan tool, view the Invalid Signal Data Display.
  2. If no invalid signal are present, view Signal Fault Data in the Enhanced DTC Data.
  3. Refer to appropriate module for diagnosing the invalid message data.
  4. Do not replace the EBCM due to this DTC fault.
You would need a factory scan tool or equivalent too diagnose this ,not a code reader . So do your self a favor an take to a dealership. I've been doing this for thirty years .

Sep 26, 2014 | 2007 GMC Acadia SLE

1 Answer

Received code P1400 engine light on what would cause this code?

GMC Truck Envoy - 2WD ' Envoy, Rainier, TrailBlazer, Ascender (VIN S/T) Service Manual ' Document ID: 1655997

DTC P1400
Diagnostic Instructions
• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor:
DTC P1400: Cold Start Emission Reduction Control System

Circuit/System Description
The catalytic converter must be warmed to efficiently reduce the emissions. The cold start strategy is to reduce the amount of time it takes to warm the catalytic converter. During a cold start, the engine idle speed is elevated and spark timing is retarded to allow the catalyst to warm quickly. This diagnostic monitors the following to build an exhaust energy model:

• Engine speed
• Spark advance
• Throttle position
• Engine airflow
• Engine coolant temperature
• Engine runtime
• Park/neutral position
• Vehicle speed

The actual model is then compared to the expected exhaust energy model.

Conditions for Running the DTC
• A cold start has been detected.
• The vehicle speed is less than 2 km/h.
• The engine is at idle with no input from the accelerator pedal.
• The airflow per cylinder is greater than 80 mg/cylinder.
• DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, P0121, P0122, P0123, P0220, P0222, P0223, P0201, P0202, P0203, P0204, P0205, P0206, P0300, P0335, P0336, P0351, P0352, P0353, P0354, P0355, P0356, P0502, P0506, P0507, P0601, P0602, P0603, P0604, P0606, P0607, P062F, P0641, P0651, P1101, P1516, P1682, P2101, P2119, P2120, P2122, P2123, P2125, P2127, P2128, P2135, P2138, P2176, P2610 are not set.
• This DTC runs for 15 seconds within the first 70 seconds of start up. This diagnostic runs once per trip when a cold start has been determined.

Conditions for Setting the DTC
The actual exhaust energy model does not match the expected exhaust energy model.

Action Taken When the DTC Sets
• The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
• The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/Failure Records.

Conditions for Clearing the MIL/DTC
• The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
• A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
• A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
• Clear the MIL and the DTC with a scan tool.

Diagnostic Aids
Any loading of the engine that lowers engine RPM, such as with partial application of the clutch, during the first 70 seconds of engine run time may set this DTC.
Circuit/System Verification
Allow the engine to cool. Monitor the Cold Startup parameter. This should indicate Yes. Start and idle the engine for at least 2 minutes. DTC P1400 should run and pass.

Circuit/System Testing
• Inspect the air intake system for the following:
- If any other DTCs are set, diagnose them first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle.
- Modified, damaged, or restricted
- Dirty or deteriorating air filter element
- Crankcase ventilation system for correct operation--Refer to Crankcase Ventilation System Inspection/Description.
- Water intrusion
- Vacuum leak and other un-metered air downstream of the mass air flow (MAF) sensor
- Intake manifold leak

• Inspect the exhaust system for the following:
- Water intrusion
- Exhaust leak
- Damaged, restricted, modified or enhanced exhaust system--Refer to Symptoms - Engine Exhaust .

Hope helps; keep us updated

Jun 30, 2011 | 2006 Chevrolet Trailblazer Ext

2 Answers

EPC light and ASR light came on, and also gas pedal does not work. After accelerated it. Engine still runs, and car starts up fine. But Can not get it to go anywhere when I press on the gas. When it went I...

Take it to mechanic shop
EPC - Electronic Power Control
ASR- Acceleration Slip Regulation.
It doesn't tell you much . Vehicle has to be diagnosed by pro's.

May 07, 2010 | 2001 Volkswagen Beetle

3 Answers

2007 aveo misfire faults

gm has a problem with this from way back. double check your spark plugs and if they are not ac delcos, change them. ive seen this time and time again swearing, myself, that there is no way that the plugs would cause this issue. it always comes up with random misfire and usually another 1 or 2 codes misfire codes. put in ac delco, no more codes. let me know

Feb 22, 2010 | 2007 Chevrolet Aveo 5 Hatchback

1 Answer

Hesitation when accelerating. when tac is over 2K RPM the car runs o.k. but the vehicle shakes and rattles when accelerating under 2K RPM. someone said it may be the TPS but I am thinking it could be the...

Sounds like misfire... Did the 'Check Engine' Light come ON? Whenever the 'CHECK ENGINE' light comes on, the ECU (Engine Control Unit) sets a Diagnostic Trouble Code (DTC). These codes identify the particular engine management system which caused the light to come on.
You'll need to use/find an OBDII (On-Board Diagnostic) Scanner to retrieve any code which have been stored in the ECU computer. Afterward, we might be able to help you DIAGNOSE and perhaps eventually fix the problem.

Aug 07, 2009 | 2001 Hyundai Tiburon

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