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Author archives: Denso

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    Poor Cooling Performance in a Vehicle With Dual A/C

    CONDITION: Poor cooling performance in a vehicle with a dual (front/rear) A/C system. The system uses a joint type expansion valve* in the rear cooling unit, with no magnetic valve. The compressor has been confirmed to be ok, and the front expansion valve was replaced recently. CAUSE: The thermosensitive tube of the rear expansion valve …

    September
    29
    2022

    Starter System Diagnosis

    The following general information has been assembled as a guide for starter circuit diagnosis. Refer to the appropriate Original Equipment Manufacturer’s service manual for specific information pertaining to starting system diagnostic procedures and safety precautions for your vehicle. Bench testing If a starter test bench is available, follow the procedures found in the bench tester’s …

    September
    20
    2022

    Cabin Air Filter Installation Precaution

    CONDITION: Field reports indicate the vehicle air conditioning system uses only outside air, even if the recirculation mode is engaged or the recirculation mode doesn’t operate at all. CAUSE: It is most likely that the vehicle cabin air filter was replaced with the air blend door in the ‘Fresh Mode’ or the blower assembly door …

    August
    26
    2022

    Denso focuses on air conditioning

    Denso is a leading original equipment (OE) manufacturer and system supplier to vehicle manufacturers (VMs) globally and a pioneer in the design and development of air conditioning (AC) systems. Ensuring these systems are functioning correctly is an important responsibility for workshops and, particularly as the weather gets warmer, both a comfort and safety benefit for …

    August
    5
    2022

    DO-IT-YOURSELF (DIY) SERVICE PRODUCES DTC P0135. WRONG PART INSTALLED

    CONDITION: A vehicle owner living in Portland, Oregon performs a DIY maintenance on his 4 cylinder Camry, including spark plugs and universal oxygen sensors. After the repair the check engine light was illuminated. The vehicle was then driven to a professional repair facility. The service technician defined the check engine light as a Diagnostic Trouble …

    July
    18
    2022

    A/C CLUTCH INOPERATIVE AND A/C LIGHT FLASHING

    CONDITION: The vehicle A/C is inoperative, compressor clutch will not engage and A/C light is flashing. CAUSE: The magnetic clutch relay is disengaging, causing the clutch to disengage and the A/C light to flash. CORRECTION: Toyota has developed a new magnetic clutch relay for this application*. Original RelayRevised Relay  Toyota P/N = 90987-02022Toyota P/N = …

    June
    3
    2022

    Denso introduces more cabin filter references

    Cabin filter replacement is not only a scheduled service replacement item, but also an important health and safety precaution, which is why original equipment (OE) manufacturer Denso, says it continues to increase its aftermarket offering. The most recent new additions, which are now available throughout Europe, include six cabin pollen filters that cater for 653 …

    March
    29
    2022

    Denso further bolsters online training offering

    Denso Aftermarket has further bolstered its online training offering with the launch of the new ‘Denso in the Workshop’ webinar series. Technical guru Mike Sadler launched the new ‘in the workshop’ format with a hands on demonstration and detailed discussion concerning oil contamination of the air conditioning system, in conjunction with aftermarket personality Hayley Pells. …

    September
    15
    2021

    Denso offers wipers solution

    When it comes to reasons for an NCT test failure, the condition and performance of the wiper blades remains high up on the list, which proves that despite their essential role in driver safety, they’re often overlooked by vehicle owners. Supplying and fitting wiper blades is therefore an important provision that should be offered by …

    July
    20
    2021

    Denso: Lean Vs Rich O2 Sensor

    Oxygen sensors monitor the air fuel mixture under idle, moderate acceleration and cruise conditions. Oxygen sensors have a small range of limits in detecting and adjusting the difference from an optimum air/fuel ratio. A lean mixture can result in poor vehicle performance and even damage your engine. A rich mixture can result in unburnt fuel …

    June
    11
    2021