2001 Lexus GS 300 Reading Diagnostic Trouble Codes

Download NOTE: This is the only information provided by the manufacturer for reading diagnostic trouble codes for this system. If compressor lock occurs during A/C operation, the A/C switch indicator on the A/C control assembly starts blinking. When this occurs, check for compressor lock (DTC B1422) using diagnosis trouble code check then proceed to inspect the circuit or the component. Compressor lock sensor circuit. (See DTC B1422 Compressor Lock Sensor Circuit) By operating each of the A/C control switches as shown in the diagram, it is possible to enter the diagnosis check mode. a. Turn the ignition switch on while pressing the A/C control AUTO switch and R/F SW simultaneously. b. Check that all the indicators light up and go off at 1 second intervals 4 times in succession. a. Perform an indicator check. After the indicator check is completed, the system enters the DTC check mode automatically. b. Read the DTC displayed on the panel.… Read More

2001 Chevrolet Chevy K Silverado Transmission Stuck in Second or Third Gear

Download Malfunction Indicator Lamp (MIL) On, Transmission Stuck in Second or Third Gear, Instrument Cluster Inoperative (Verify and Repair Source of Voltage Loss In Transmission Solenoid Power Supply Circuit ) Models: 2006 and Prior GM Passenger Cars and Light Duty Trucks 2005-2006 HUMMER H2 2006 HUMMER H3 2005-2006 Saab 9-7X with 4L60-E, 4L65-E, 4L80-E or 4L85-E Automatic Transmission (RPOs M30, M32, M33, MT1, MN8) Condition Some customers may comment on one or more of the following conditions: Upon investigation, one or all of the diagnostic trouble codes (DTCs) P0740, P0753, P0758, P0785, P0787, P0973, P0976, P1860, P2761, P2764 and P2769 may be set depending on the vehicle. Cause The most likely cause of this condition may be a loss of voltage to the transmission solenoid power supply circuit. This condition may also be the result of an incorrect installation of an aftermarket electronic device such as a remote starter or alarm system.… Read More

1999 Chevrolet Suburban C1500 Engine Misfire MIL/SES Light Illuminated or Flashing

Download Information on Engine Misfire MIL/SES Light Illuminated or Flashing DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0420 or P0430. SERVICE INFORMATION If you encounter vehicles that exhibit the above conditions, refer to SI for the appropriate DTC(s) set. If no trouble is found, the cause may be due to an ECM ground terminal that has corroded with rust over time. Inspect the main engine wiring harness ground terminal (G103) for this condition. The wire terminal (G103) attaches either to the front or to the rear of the right side cylinder head, depending on the model year of the Full Size Pickup and/or Utility Trucks. If the ECM ground terminal has been found to be corroded, then follow the service procedure outlined in this bulletin to correct the corrosion issue. Fig. 2: Engine Wiring Harness Ground Terminal Location (1999-2006 Full Size Pickup and/or Utility Trucks) Courtesy of GENERAL MOTORS CORP.… Read More

1998 Ford Contour A/T – CD4E Harsh and Delayed Upshifts/DTC’s Stored

Download 1998 Ford Contour V6-153 2.5L DOHC VIN L SFI – A/T – CD4E Harsh and Delayed Upshifts/DTC’s Stored. TRANSAXLE – CD4E – HARSH AND DELAYED 1-2/2-3 UPSHIFTS – AFTER TRANSAXLE OR TURBINE SHAFT SPEED SENSOR (TSS) REPLACEMENT – POSSIBLE DIAGNOSTIC TROUBLE CODES (DTC) 628, 642, 645, 646, 647, 648, P0731, P0732, P0734, P0741, AND P1744 FORD: 1994-1997 PROBE 1995-2000 CONTOUR 2001-2002 ESCAPE MERCURY: 1995-2000 MYSTIQUE 1999-2002 COUGAR ISSUE Some vehicles equipped with the CD4E transaxle may exhibit harsh and delayed 1-2/2-3 upshifts along with DTCs for gear ratio errors after the Transaxle or Turbine Shaft Speed sensor (TSS) have been replaced. DTCs may include OBD1 codes 628, 642, 645, 646, 647, 648, or OBD II codes P0731, P0732, P0734, P0741, and P1744. SERVICE PROCEDURE If the condition occurred after replacing the Transaxle or TSS, use the TSS Selection Chart and determine the correct sensor for the vehicle. 1. Remove the existing TSS from the CD4E pump body.… Read More

2003 BMW 325I Sport Wagon Check engine light on and fault codes stored

Download 2002 BMW 325I 2.5L 2003 BMW 325I Sport Wagon 2.5L, Eng Des M54, USA Customer Concern: Check engine light on and fault codes stored. Vehicle running normally. Tests/Procedures: 1. Based upon stored fault codes for secondary air system, there is little or no flow of secondary air into engine. Typical causes for this issue are failed secondary air pumps and/or secondary air check valves. Secondary air pump should operate under normal circumstances when vehicle is first started to perform system test. Pump will normally be heard running when standing in front right corner of vehicle. 2. The secondary air pump is located in the right front of engine compartment. A secondary air pump relay located in the glove box is controlled by the engine control module and sends power to the secondary air pump. 3. Air pump can be disconnected and supplied with power and ground at pump to verify operation is possible.… Read More

1996 Chevrolet Chevy K Pickup Ignition Coil Control Circuit High Voltage

Download 1996 Chevrolet Chevy K Pickup – 4WD | Chevy Pickup, GMC Pickup, Suburban, Tahoe, Yukon (VIN C/K) Service Manual DTC P1351 Ignition Coil Control Circuit High Voltage. Circuit Description The enhanced ignition system uses the crank sensor in order to provide the timing input to the VCM. The VCM uses this reference pulse in order to determine the individual ignition spark timing for each cylinder. Once the VCM calculates the ignition timing, the ignition coil module on the IC circuit receives the timing signal. Each timing pulse received by the ignition coil module on the IC circuit triggers the coil module in order to operate the ignition coil. The secondary ignition voltage is induced, and then the secondary ignition voltage is sent to the distributor for distribution to each spark plug. This DTC is a type A DTC. The IC signal voltage ranges from about 0.5 volt to 4.5 volts.… Read More

1995-1997 FORD EXPLORER TRANSFER CASE BINDING OR SHUDDER DIAGNOSTICS

Download FORD: 1995-1997 EXPLORER 2. Connect the New Generation Star (NGS) Tester ISSUE to the Data Link Connector (DLC) underneath The diagnostic procedure for binding or shudder the steering wheel. Monitor for any Diagnostic from transfer case in slow, tight turns while in 4 Trouble Codes (DTCs) set by the transfer case Auto mode may be inaccurate for some vehicles. that could indicate incorrect speed sensor function. Codes could include, but are not ACTION limited to: Diagnose transfer case binding or shudder concerns using the following Diagnostic Procedure. •P1836 – Front propshaft sensor circuit failure •P1837 – Rear propshaft sensor circuit failure DIAGNOSTIC PROCEDURE •P1874 – Hall effect sensor power short circuit to battery 1997 EXPLORER •P1875 – Hall effect sensor power circuit 1. Test drive the vehicle in 4 Auto, 4 High and 4 failure Low. Evaluate the vehicle in each of these NOTE modes. The vehicle should bind in turns in both ADDITIONAL CODES COULD BE SET AS WELL.… Read More

2004 Chevrolet Chevy Suburban Gradual Coolant Loss Over Time with No Evidence of Leak Found

Download 2004 Chevrolet Chevy Suburban – 4WD | Avalanche, Escalade, Suburban, Tahoe, Yukon (VIN C/K) Service Manual. Information on Gradual Coolant Loss Over Time with No Evidence of Leak Found. Models: 2004-2006 Buick Rainier 2001-2006 Cadillac Escalade Models 2001-2006 Chevrolet Avalanche, Blazer, Silverado, Suburban, Tahoe, TrailBlazer Models 2001-2006 GMC Envoy, Jimmy, Sierra, Yukon Models 2001-2004 Oldsmobile Bravada 2005-2006 Saab 9-7X with 4.8L or 5.3L VORTEC® GEN III, GEN IV V8 Engine (VINs V, T, M, B, Z – – RPOs LR4, LM7, LH6, L33, L59) Some vehicles may experience a gradual coolant loss over time. A very low percentage of cylinder head(s) manufactured with an embossed Castech logo may develop a porosity crack in a very specific area. Inspect the cylinder head assembly to determine if the casting was manufactured by Castech. This can be accomplished by inspecting for their casting logo located on top of the intake port, under the rocker arm support rail and in the spring deck cavity portion of the cylinder head.… Read More

2005 Chevy Truck Silverado 1500 Blower Motor Resistor Replacement

Download 2005 Chevy Truck Silverado 1500 2WD V8-5.3L VIN T Vehicle Level Heating and Air Conditioning Blower Motor Resistor Service and Repair Blower Motor Resistor Replacement. BLOWER MOTOR RESISTOR REPLACEMENT REMOVAL PROCEDURE 1. If equipped, remove the IP sound insulator. 2. Disconnect the electrical connection from the blower motor . 3. Disconnect the electrical connection from the blower motor resistor. 4. Remove the blower motor resistor retaining screws. 5. Remove the blower motor resistor. INSTALLATION PROCEDURE 1. Install the blower motor resistor. NOTE: Refer to Fastener Notice in Service Precautions. 2. Install the blower motor resistor retaining screws. Tighten Tighten the screws to 1.6 N.m (14 lb in) 3. Connect the electrical connection to the blower motor resistor. 4. Connect the electrical connection to the blower motor . 5. If equipped, install the IP sound insulator.… Read More

1994 Chevy Truck C 1500 Ignition – Timing Connector Location Change

Download 1994 Chevy Truck C 1500 Truck 2WD V6-262 4.3L VIN Z Vehicle Level Maintenance Tune-up and Engine Performance Checks Ignition Timing Technical Service Bulletins Ignition – Timing Connector Location Change. INFORMATION SUBJECT: TIMING CONNECTOR LOCATION CHANGE MODELS: 1994 CHEVROLET AND GMC C/K TRUCKS WITH GASOLINE ENGINES The timing connector, which can be disconnected to return engine timing to base for adjustment purposes, has been moved from the engine compartment to inside the cab. This new location is not currently reflected in the Service or Owner’s Manual. The new location is under the dash directly below the glove compartment. The tan/black wire is routed for a short distance outside of a large wiring harness. This large harness is routed between the heater blower motor and evaporator case. The timing connector is taped to the wire bundle (Figure 1).… Read More