2. Remove factory installed clip from new DENSO wiper blade

4. Insert pin into wiper blade connector

 2. Pull old wiper blade off hook

 4. Insert hook into wiper blade connector

The Diagnostic Process

STEP ONE: Confirm the Customer’s Concern

Who was operating the vehicle?

• Primary Driver
• Other

Know the facts vehicle air conditioning expectations differ from driver to driver

STEP TWO: Confirm the Customer’s Concern

Systematic Diagnosis

This table shows the priority in which each problem should be inspected, after identifying the problem use the area of inspection in number priority, then repair or replace as necessary.

Typical pressure readings

Manifold Gauges (sample readings)

86º – 95º F | 1500 RPM | Max Cool | High Blower

• Moisture Entered in Cycle

• Excessive Refrigerant or Insufficient Condenser Cooling
• Expansion Valve Trouble (Opens Too Much) or Improper Installation of Heat Sensitizing Tube
• Air Entered In The Cycle

Compressor Replacement

Compressor Preparation

1. Slowly release the pressure from the Schrader valve located on the compressor shipping plate(s) or hose caps
2. To prevent the loss of refrigerant oil:
   • Place the compressor on a flat surface with the shipping plate(s) or hose caps in an upright position
   • Then remove and save the shipping plate(s), O-ring(s), and mounting bolts or hose caps.
3. Remove the service valve(s) or hose caps from the old compressor. Make sure service valves and O-ring surfaces are clean.
4. Verify the level of compressor lubricant

Flushing the A/C System

What is the purpose of flushing the A/C system

• Remove contaminates that are in the A/C system
• Most of the contamination is caught up in the oil, not the refrigerant

When to Flush

• Oil Contamination
• Non pure refrigerant (R12 or R134a) used
• Compressor Failure
• Receiver/drier or Accumulator failure (descant)

What to Flush

• Hoses and Piping (without inline mufflers)
• Condenser (Round Tube and Fin/Serpentine)
• Evaporator (Round Tube and Fin/Serpentine)
• Compressor (Swash plate/Scroll/Through Vane)

What NOT to Flush

• Hoses and Piping with inline mufflers
• Condenser (Flat Tube Multi flow)
• Evaporator (Flat Tube Multi flow)
• Compressor (Variable Displacement)
• Complete system (Closed loop)

The system should be broken down to as many individual components as possible. Do not try to flush the entire high side of the A/C system as one long piece with hoses and the condenser attached.

Quiet, Efficient Performance

Reduces fuel consumption and maximizes catalytic converter life

Mapping Air/Fuel Ratios Throughout RPM Range for Reduced Emissions

DENSO’s air/fuel ratio sensor began to appear in the early 90s as vehicle manufacturers increased demands for better emission standards. DENSO’s air-to-fuel ratio sensor were developed to measure the air-to-fuel ratio information under a wider range of driving conditions. The air/fuel ratio sensor sends information to the engine management computer to makes adjustments based on driving conditions. This wider range and variable adjustments control the motor to burn fuel more efficient and produce less emissions.

As the automotive industry continues to improve on their standards DENSO is keeping the pace with advancements in our engineering to meet the demands from the industry. Also, as light duty fleet owners are holding on to their vehicles for longer periods, DENSO continues to make auto parts available for those critical replacement parts for all applications.

As oxygen sensor technology has evolved, DENSO’s engineers have been there every step of the way. From the first thimble-type sensors to heated, quick-response sensors required to meet ever more stringent emissions regulations, DENSO has supplied the OE industry with quality components. DENSO continues to innovate with the latest development in oxygen sensors, known as air/fuel sensors. These components, also known as wide-band oxygen sensors, have a broader response range to provide much finer control of air/fuel mixtures over a greater variety of operating conditions. DENSO helped to develop this important new technology. Consumers can rely on DENSO First Time Fit^® air/fuel sensors.

Oxygen and A/F Sensor Positioning: Left or Right?

Many manufacturers’ catalogs identify the left and right side positioning; however, diagnostic tools refer to sensor locations by Bank and Sensor (e.g. Bank 1 Sensor 1).

In the diagrams below, the longitudinal engine orientation illustrations depict rear-wheel drive. In cases of transverse engine (front wheel drive), the concepts are the same, however, the mounting direction is at a 90 degree rotation left or right from longitudinal.

Engine configurations will vary. Please review your service manual or online technical references for accurate engine configurations.

Abbreviations

Conversions

Limits internal corrosion, extending A/C system life