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toyota 5afe corolla showing engine check light after the engine reaches normal operating temperature

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1983 Mazda RX-7 GSL ENGINE COMPRESSION TESTING

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HIGH TENSION WIRE RESISTANCE Carefully remove high tension wires from spark plugs and distributor cap. Using an ohmmeter, measure resistance of wires while gently twisting wires. If resistance is not to specifications, or fluctuates from infinity to any value, replace high tension wire(s). HIGH TENSION WIRE RESISTANCE High Tension Wire Routing For high tension wire routing, see Fig. 2 and Fig. 3 . Fig. 3: Locating High Tension Wires On Distributor Cap Courtesy of MAZDA MOTORS CORP. ADJUSTMENTS DISTRIBUTOR All models are equipped with Mitsubishi electronic ignition with 2 pick-up coils. Air gap is non-adjustable IGNITION TIMING 1. Warm engine to normal operating temperature. Connect a tachometer, then connect timing light to leading (lower) spark plug of front rotor. Start engine and run at idle speed. 2. Check ignition timing and rotate distributor to correct if necessary. Tighten distributor lock nut and recheck timing. 3. Connect timing light to trailing (upper) plug of front rotor. Start engine and check timing. If not correct, loosen vacuum unit attaching screws. Move vacuum unit in or out to adjust trailing timing. Remove test equipment.

2003 BMW 525I 2.5L Check engine light on and fault codes stored Vehicle running normally

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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. 4. Check valve on front right of cylinder head can be supplied with vacuum and visually checked for opening of valve. 5. Vacuum line from check valve to operating solenoid should also be inspected for cracks or being disconnected. Vacuum line follows right side of cylinder head to back of cylinder head to the secondary air solenoid located under left rear side of intake manifold. 6. The solenoid should allow vacuum flow to the check valve during vacuum pump operation. The solenoid is controlled directly by the engine control module and receives power during key-on-engine-off. Potential Causes: A.I.R. Check Valve Engine Control Module (ECM) Codes — Engine control module fault. Defective Secondary Air Pump Secondary Air Pump Relay Secondary Air Supply Hose Broken Vacuum Line Diagnostic Codes: P0491, P0492 Author: Robert Jacobs Average Reported Mileage: 69066

1992 Toyota Truck Pickup 2WD Cooling and Exhaust Engine Ignition Timing Adjustments Manual

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1. Connect a tachometer test probe to terminal IG of the check connector, Fig. 211 2. NOTE: Never let the tachometer lead touch ground as this could cause damage to the igniter and/or coil. Be sure to check that your tachometer is compatible with this ignition system. Consult the operating manual for your instrument. Service Check Connector 3. Fig. 223 Ignition Timing (10) Check idle speed . 4. Idle Speed : 800 rpm Using a timing light, verify that the timing mark on the timing cover is aligned with the mark on the crankshaft pulley, Fig. 223 5. Ignition Timing: 10°BTDC at idle Tighten the distributor bolt and recheck the ignition timing. 6. Remove service wire. 7. Check idle advance timing with service wire removed. 8. Ignition Timing: 8°BTDC at idle Check idle speed and adjust if necessary, COMPUTERIZED ENGINE CONTROLS. 9. Disconnect tachometer and timing light from engine. 10. Timing Belt Removal Notes Fan Shroud Removal & Installation Remove radiator fan upper and lower shrouds. 1. Installing Power Steering Pump And Belt Remove power steering pump drive belt and pump. 2. Disconnect No. 2 and No. 3 air hoses from air pipe. 3. 4. Fan Removal Remove alternator drive belt , cooling fan, belt guide and fan pulley. 5. Remove No. 2 timing belt cover. 6. Fig. 6 Aligning Timing Marks Place No. 1 cylinder at TDC of compression stroke by turning the crankshaft pulley and aligning pulley groove with the “0” mark on the No. 1 timing belt cover. Ensure alignment marks on the camshaft timing sprockets and the No. 3 timing belt cover are correctly aligned, Fig. 6. 7. If not, turn the crankshaft pulley one complete revolution. 8. Crankshaft Pulley Removal

2005 Mazda 3 S 2.3L Check engine light is on for a code transmission P0715 (Input/ Turbine Speed Sensor)

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Customer Concern: Check engine light is on for a code transmission P0715 (Input/Turbine Speed Sensor). Tests/Procedures: 1. Scope the signal at the Powertrain Control Module (PCM) and watch for glitches while maneuvering the wire harness near the PCM connector. Potential Causes: Wiring Diagnostic Codes: P0715 Author: Guy Dibble Average Reported Mileage: 56000

1999 Saturn SL1 L4-1.9L SOHC VIN 8 Engine – Driveability Concerns/ Cooling System DTC’s Set

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1. Disconnect engine coolant temperature sensor electrical connector and inspect sensor and connector terminals for corrosion and/or evidence of engine coolant. ^If terminals are corroded or if there is evidence of engine coolant proceed to step 4. ^If terminals are not corroded and there is no evidence of engine coolant, reconnect the electrical connector and continue to next step. 2. Perform one or both of the following checks to determine whether the engine coolant temperature sensor is providing the correct temperature indication. If engine coolant temperature sensor reading does not pass either of the above tests, continue with next step. ^If engine is at ambient temperature (vehicle has been sitting overnight or not started for several hours), use a Scan tool to compare the inlet air temperature ( IAT ) to the engine coolant temperature ( ECT ). These two readings should be within 2°C (4°F) of each other. ^If engine is at operating temperature, install a thermometer in the coolant recovery reservoir. With the engine running and A/C off, use a Scan tool to compare the engine coolant temperature sensor reading to the thermometer reading. These two readings should be within 8°C (15°F) of each other If engine coolant temperature sensor reading passes both of the tests above, refer to appropriate symptom diagnostic chart in the Engine/Emissions Controls Section of applicable Engine Service Manual. 3. Turn ignition off. 4Remove coolant surge tank cap. 5. Drain at least 1.9 L (2 Qt.) of engine coolant from the cooling system by opening radiator drain valve or removing engine drain plug. Collect engine coolant in a container. 6. Disconnect engine coolant temperature sensor electrical connector. 7. Remove engine coolant temperature sensor from cylinder head. 8. Obtain replacement engine coolant temperature sensor (P/N 21025106). 9. Use appropriate tap to clean sensor mounting hole of any thread sealant residue. 10. Install engine coolant temperature sensor in cylinder head. Torque: Engine Coolant Temperature Sensor: 8 Nm (71 in-lbs) 11. Inspect harness connector terminals for corrosion and/or evidence of engine coolant. If harness connector terminals are corroded or there is evidence of engine coolant, the harness connector must be replaced with new connector (P/N 12117087-includes: connector, terminals, wires, and splice sleeves). 12. Connect engine coolant temperature sensor connector. 13. Transfer engine coolant drained in step 5 into coolant surge tank. If necessary fill coolant surge tank to the FULL COLD range with 50/50 solution of correct type of antifreeze and clean water. 14. Start engine and check for leaks. 15. Run engine until upper radiator hose is hot, then add additional coolant if needed to bring the level to the FULL COLD level (1991-early 1997) or within the Min./Max. cold range (late l997-2001). 16. Install coolant surge tank cap.