Domain Tools

2001 Volkswagen Beetle 1.9L

Customer Complaint = Vehicle does not accelerate well, seems to be underpowered.

Procedure:

When a 1.9L TDI diesel engine exhibits a lack or power and/or poor acceleration, proceed as follows:

1. Check the intake manifold for excessive carbon buildup and clean as necessary. Remove the Exhaust Gas Recirculation (EGR) valve to gain access and inspect the passages.

2. Using a full function factory compatible scan tool, verify Mass Airflow (MAF) readings as follows:
NOTE: The following tests must be performed on a warm engine.

3. Start and idle the vehicle. Enter Engine Address Word 01, Function 08 Read Measuring Blocks and Display Group 003.

4. Observe the 2nd (air mass drawn in specified) and 3rd (air mass drawn in actual) display fields. Both fields should match (typical idle range is 230-370 mg/H).

5. Enter Engine Address Word 01, Function 08 Read Measuring Blocks and Display Group 010. Observe the first (air mass drawn in) 3rd (Manifold Absolute Pressure (MAP)-Boost) and 4th (throttle position) display fields.

6. Perform a Wide Open Throttle (WOT) acceleration from 35 MPH in 3rd gear and record the displayed values in fields 1 and 3 at 3,000 RPM and display field 4 showing 100% throttle. Field 1 should show in excess of 810 mg/H and field 3 should show between 1,700 to 2,080 mbar of available boost (optimum readings are 1,850 to 1,950 mbar).

7. Lower than normal MAF readings indicate a potential plugged intake or a faulty MAF.

Potential Causes:

Carbon Fouled Intake Manifold
Defective Mass Air Flow (MAF) Sensor

Confirmed Fix:

6 – Intake Manifold
2 – Exhaust Gas Recirculation (EGR) Passages
2 – Mass Air Flow (MAF) Sensor

Duration : 0:3:51

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2001 Chevy Lumina 3.1L

Customer Complaint = Check engine light On and codes P0440

Procedure:

1. Before starting, verify that the customer did not leave the gas cap loose at any time or fill the gas tank with the engine running. This can set code P0440.

2. Using a scanner, verify that the Fuel Tank Pressure Sensor (FTPS) voltage reads about 1.5 volts with the gas cap loose.

3. Check all Evaporative Emission Control System (EVAP) lines, seals and components for leaks. Verify the gas cap seals.

4. Verify that the purge solenoid allows vacuum to pass through when energized by a scanner. It should seal shut when de-energized.

5. Install a clean, long hose on the vent solenoid. While commanding the vent solenoid on with a scanner, place the hose to your mouth and suck briefly against the solenoid. The solenoid should be sealed shut when energized by the scanner.

6. Do this procedure with the vent solenoid several times. Vent solenoids often leak on an intermittent basis.

Potential Causes:

Evaporative Line
Gas Cap
Purge Solenoid
Vent Control Solenoid

Confirmed Fix:

Fuel Tank Filler Neck

Duration : 0:1:55

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2004 Toyota Prius 1.5L

Customer Complaint = Check engine light On and codes P1121, P1116 set

Procedure:

1. Check to see if the technical service bulletin EG024-05 has been performed for the coolant flow control valve.

2. Monitor the position sensor and check to see if the coolant flow control valve can be operated to move open and closed.

Potential Causes:

Coolant Flow Control Valve

Confirmed Fix:

Perform TSB

Duration : 0:2:51

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2006 Nissan Altima Base 2.5L

Customer Complaint = Idle speed is incorrect, check engine light is on and code P0507 is set

Procedure:

1. Perform the Accelerator Pedal Released Position Learning procedure.

2. Perform the Throttle Valve Closed Position Learning procedure.

3. Perform the Idle Air Volume Learning procedure. Follow TSB# NTB05-067 and disconnect one or more fuel injectors as necessary to bring the RPM down and perform the Idle Air Volume Learning procedure.

4. If the idle will not relearn, it may be necessary to bring the vehicle to the dealer to have the factory scan tool, try going through the relearn procedures.

5. If the problem still occurs, the vehicle may require throttle body replacement.

Potential Causes:

Accelerator Pedal Released Position Learning
Idle Air Volume Learning Procedure
Throttle Body
Throttle Valve Control Module — Throttle valve closed position learning.

Confirmed Fix:

13 – Idle Air Volume Learning Procedure
10 – Idle Air Relearn Procedure
7 – Throttle Body
6 – Idle
3 – Accelerator Pedal Released Position Learning
3 – Idle Relearn Procedure, Throttle Body
2 – Engine Vacuum
2 – Idle Relearn Procedure
2 – Throttle Adaptation
1 – Electronic Throttle Body, Powertrain Control Module (PCM)
1 – Engine Control Module (ECM), Idle Relearn Procedure
1 – Positive Crankcase Ventilation (PCV) Valve
1 – Relearn Procedure
1 – Throttle Angle

Duration : 0:3:2

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Vehicle misfires, does not acellerate well, seem to be underpowered, loss of power, low power.

Duration : 0:2:15

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2003 Dodge Ram 1500 4×4 5.9L

Customer Complaint = Check engine light On, Vehicle does not shift properly, code P1762 stored in memory

Procedure:

1. Check the voltage of the governor pressure sensor with the Key On Engine Off (KOEO). It should be about 0.5 volts.

2. If higher than 0.8 volts, check the transmission temperature sensor reading.

3. If it is not accurate, check the sensor ground to the governor pressure/transmission temperature sensor.

4. If the transmission temperature sensor is reading correctly, replace the governor pressure sensor.

Potential Causes:

Evaporative Line
Gas Cap
Purge Solenoid
Vent Control Solenoid

Confirmed Fix:

1 – Governor Pressure Sensor
1 – Transmission
1 – Transmission Fluid

Duration : 0:2:6

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2003 Honda Accord DX 2.4L

Customer Complaint = ABS light is on after repairing wheel bearings

Procedure:

1. Check the wheel bearing, it has a Brown dust shield behind the dust shield is the encoder, and the Brown dust shield should go to the inside of the knuckle.

2. If installed backwards, it will set this code.

Potential Causes:

Improperly Installed Bearing

Confirmed Fix:

Improperly Installed Wheel Bearing

Duration : 0:1:42

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2000 BMW 528 IT 2.8L M52TU

Customer Complaint = Vehicle does not accelerate well, seems to be underpowered. Check engine light illuminated and a code P0340 (BMW 65) set

Procedure:

1. Test wiring at the sensor connector:

A. Pin 1 (Red/White wire) should have battery voltage with ignition on.

B. Pin 2 (Yellow) should have 5V from engine control module.

C. Pin 3 (Brown) is a ground.

2. As the cam turns, the 5V reference on pin 2 should switch on and off (5V square-wave digital signal).

Potential Causes:

Defective Camshaft Position Sensor (CMP)
Wiring

Confirmed Fix:

3 – Camshaft Position Sensor (CMP)
2 – Intake Camshaft Position (CMP) Sensor
1 – Crankshaft Position (CKP) Sensor

Duration : 0:2:20

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2002 Toyota Tacoma 3.4 Ltr. Engine,

The Check Engine Light (CEL) is on with a trouble code P1135. The code indicates that there is a problem with the ban 1 sensor 1 Air/Fuel (A/F) ratio sensor.

Test/ Procedures:
1. First Verify that the resistance specification for the heater circuit are 0.8 to 1.4 ohms at 68 degrees and 1.8 to 3.2 ohms at 1400 degrees.

2. If the resistance at the heater circuit is OK, verify that there is a good battery voltage to the sensor and the resistance is correct.

3. Next, check for the correct current flow on the circuit. It needs to draw more than 0.25 amps and less than 8 amps when the Oxygen sensor heater is grounded.

Pttential Causes:

Air Fuel Ratio Sensor
Connection
Fuse

Duration : 0:3:12

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2000 Volvo S40 1.9L

Customer Complaint = Check Engine Light On, code P0128 set in memory

Procedure:

1. Test actual ECT and compare to indicated temperature on scan tool.

2. If they agree, the engine is probably warming up too slowly because of a leaking thermostat.
3. Replace the thermostat, clear the code and test-drive.

Potential Causes:

Engine Coolant Temperature (ECT) Sensor
Thermostat

Confirmed Fix:

3 – Engine Coolant Temperature (ECT) Sensor, Thermostat
1 – Coolant Temp Sender, Thermostat
1 – Cylinder Head Gasket

Duration : 0:2:44

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