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### Alan McAvoy awm2@chrysler.com 

# R-1234yf A/C Update

### 1979 2003 Why HFO-1234yf?
Meet the directive for a refrigerant with a Global Warming Potential (GWP) of less than 150

### • 2016 EPA mandate for corporate fleet average <250 g/mile of CO2 • Lower GWP refrigerant, A/C system leak reduction & A/C efficiency improvements provide credits for the manufacturer towards the CO2 requirement 3 types of A/C credits available: Direct Credits 1. R-1234yf alternative refrigerant (up to 15.8 g/mile of credit per vehicle) 2. Refrigerant leak reduction on current refrigerant (up to 7.2 g/mile of credit per vehicle) Indirect Credits 3. System efficiency improvements (up to 5.7 g/mile of credit per vehicle) Why R-1234yf?

## Developed by DuPont & Honeywell
• SolsticeTMyf Refrigerant (R-1234yf) Seewww.1234facts.com 

### • Similar procedures & processes compared to R134a 

### • Pressure & temperature relationship similar to R134a 

## R-1234yf• Alfa Romeo 4C • FIAT 500 & 500L (FF/BF) • Ram 1500 (DS) • Jeep Grand Cherokee (WK) • Jeep Wrangler (JK) • Jeep Cherokee (KL) 

### 2015 FCA NAFTA R-1234yf Phase in

• Chrysler 200 (UF) • Chrysler 300 (LX) • Dodge Durango (WD) • Dodge Challenger (LA) • Dodge Charger (LD) • Dodge Dart (PF) 

### Calendar year Body Code 2013 2014 2015 DS R-1234yf FF/BF/4C R-1234yf JC JK R-1234yf KL R-1234yf LX/LD/LA R-1234yf RT PF R-1234yf UF R-1234yf WK/WD R-1234yf Sales Code - XFC = Built with R-1234yf A/C Refrigerant• Ram 1500 / Jeep Cherokee & Wrangler Wrangler / Chrysler 200 & 300 / Dodge Challenger & Charger • Denso 7SBH17C Variable Displacement Compressor • Dodge Dart • 1.4L Turbo = Delphi Fixed Displacement • 2.0L / 2.4L MultiAir - Denso 7BH17C Variable Displacement Compressor • Jeep Grand Cherokee / Dodge Durango • FIAT 500 / 500L • Alfa Romeo 4C • Delphi Variable Displacement Compressor 

### FCA 2015 R-1234yf A/C Compressors (NAFTA)

Clutch & Coil

### Mopar only offers 10 lb. disposable cylinders of R-1234yf to our dealers • P/N68224028AAis priced per oz. with an MSQ (minimum sales quantity) of 160 (160 oz. = 10 lbs.)

• Part quantity: Dealers are to bill how much refrigerant is used for the repair, which is the difference between the recovered amount and the charged amount as shown on the print out from the A/C machine • Current list price is $9.73 per oz. or $1,556.80 per 10 lb. cylinder R-1234yf A/C Refrigerant

### R-1234yf System Modifications

### R-1234yf Underhood Label

### R-1234yf Compressor Oil Mopar PAG ND-12 Compressor Oil

p/n 68224150AA • R-1234yf vehicles require new compressor oils • DO NOT use R134a PAG oil in R-1234yf systems as it lacks the acid reducer required for R-1234yf systems • Denso Compressors use PAG ND12 oil which is backwards compatible with some R134a systems (Replaces Denso ND8 oil) • Delphi R-1234yf Compressors use p/n 68232939AA (PSD-1) Oil

### Typical Refrigerant Oil Capacities

Same Compressor Oil Drain Procedure as other Chrysler Vehicles • Drain all of the refrigerant oil from the old A/C compressor • Drain all of the refrigerant oil from the new A/C compressor • Refill the new A/C compressor with the same amount of refrigerant oil drained out of the old compressor • Use only clean refrigerant oil of the type specified for the A/C compressor in the vehicle CAUTION: Be certain to adjust the refrigerant system oil level when replacing an A/C compressor. Failure to properly drain and measure the refrigerant oil from the A/C compressor can prevent the A/C system from operating as designed and cause serious compressor damage.A/C Clutch & Coil
Control Solenoid 

### Denso 7SBH17C R-1234yf Compressor

Denso 7SBH17C Variable Displacement Compressor High Pressure Relief Valve

### Integral Control Solenoid to reduce or increase the stroke of the pistons by adjusting the angle of the swashplate Denso 7SBH17C R-1234yf Compressor A/C Clutch Pulley

Swashplate Pistons Control Solenoid

### • A/C Clutch Relay in PDC controlled by the PCM • Control Solenoid is controlled by the HVAC Module • HVAC Module calculates compressor displacement based on A/C load & demand • Monitored inputs include Vehicle Speed, High side pressure, Engine RPM, Evap temp, In Car temp, Accelerator position, Ambient temp, Humidity & A/C request. • HVAC module sends a 12 volt PWM signal to the Control Solenoid to increase or decrease refrigerant flow • Controls the angle of the swashplate • Regulates the pressure exerted on the rear of the pistons. Increased pressure reduces the length of the stroke • With low A/C demand, swashplate is adjusted to nearly a zero degree angle to reduce drag & improve MPG Denso 7SBH17C R-1234yf Compressor

### Denso 7SBH17C R-1234yf Compressor

Maximum duty cycle 100% = Compressor at maximum displacement Minimum duty cycle 11% = Compressor at minimum displacement• High pressure relief valve vents refrigerant at 3445-4135 kPa (500-600 psi) • High pressure relief valve closes at 2756 kPa (400 psi) or below • PCM monitors high-side pressure through the A/C Pressure Transducer • High Pressure Cut-out above 3140 kPa (455 psi) • A/C Clutch will re-engage below 2450 kPa (355 psi) • Low Pressure Cut-out below 110 kPa (16 psi) • A/C Clutch will re-engage above 221 kPa (32 psi) 

### Denso 7SBH17C R-1234yf Compressor

### Typical R-1234yf A/C Performance Test Operate the HVAC system under the following conditions • Ambient temp: 15.5°C (60°F) to 43.3°C (110°F) • Relative humidity: 20% to 90% • Engine idling at normal operating temp • No sun-load, doors & windows closed • A/C heater controls set to Recirc mode, full cool, panel mode, high blower with A/C compressor engaged. • With a scan tool, actuate the engine cooling fans to high speed • Insert a thermometer in the driver side center panel air outlet & operate the A/C system until the thermometer temp stabilizes or a minimum of five minutes • With the A/C clutch engaged, compare the panel outlet air temp, ambient temp & relative humidity to the Maximum Panel Outlet Temperature chart.

### Typical R-1234yf A/C Performance Test

Similar to Chrysler R134a Performance Tests – See Service Info for specific operating parameters & testing conditions

### R-1234yf Evaporator

A/C evaporator tubes

Tapping block & O-ring seals Evaporator fins

New high efficiency evaporators must meet SAE J2842

### R-1234yf Evaporator Label Cautions Tech must

be certified Dispose of

properly See service

procedures



### R-1234yf evaporators must comply with the new J2842 SAE design and certification safety standard. This new safety standard addresses the flammability risk associated with R-1234yf refrigerant, high pressures, and possible poisoning in the event of a release of refrigerant in the passenger compartment. J2842 guidelines state that a faulty evaporator cannot be replaced with a used evaporator from another vehicle or from a salvage yard. New evaporators must meet J2842 standards and label requirements.

### Cabin Air Filter Cabin Air Filters are now standard on most vehicles Replace every 2 years or 20,000 miles

### Recalibrated for the thermodynamic properties of R-1234yf R-1234yf Expansion Valve• Thermostatic expansion valve

(TXV) design • Aluminum H-valve type body, with integral thermal sensor • Similar test procedure to Chrysler R134a Systems • See Service Info for specific operating conditions & test procedure • Freeze the A/C expansion valve control head for 30 seconds using liquid CO2 • Suction pressure should drop by at least 69 kPa (10 psi) • Allow expansion valve control head to thaw. Suction pressure should stabilize at 207 kPa to 345 kPa (30 psi to 50 psi) 

### R-1234yf Expansion Valve

H-Valve

### • Tapping blocks for A/C refrigerant lines • Integral Receiver Drier • Condenser & Receiver Drier are not serviced separately & currently replaced as an assembly R-1234yf Condenser & Receiver Drier

Condenser A/C Lines Receiver Drier

### The AGS system is controlled by the powertrain control module (PCM) over a dedicated network LIN bus. When the ambient air and engine coolant temperatures are below a specified threshold, airflow across the radiator is not required. When airflow across the radiator is not required and vehicle speeds reach a calibrated threshold, the PCM will command the shutter vanes to close. Active Grille Shutters (AGS)Integrated IHX Assembly 

### Integrated IHX AssemblyFrom Evap
To Evap From Cond To Compressor 

### R-1234yf A/C Lines – Integrated IHX

Hose in Hose Internal Heat Exchanger Line (IHX) • Co-axial design with the liquid line to the evaporator on the outside & the suction line to the compressor on the inside. • Improves A/C efficiency & performance • Also used on some R134a Chrysler vehicles

### • Larger diameter R-1234yf ports to prevent crosscontamination • Higher collar & shoulder on High-Side port prevents R134a couplers from attaching to the R-1234yf service ports R-1234yf New Service Ports

### • R-1234yf service caps are gray in color • R134a service caps are black in color R-1234yf New Service Caps

### A portion of the highpressure line, including the high-pressure port, is made of plastic Jeep Renegade R-1234yf A/C System

### • Must meet SAE & ISO standards - SAE J2843 • Integrated Refrigerant Identifier R-1234yf Recovery/Recycle/Recharge Equipment

### Robinair R-1234yf A/C Machine

Robinair Model 10500 shipped to all FIAT Chrysler Dealers as an essential tool (similar to the Robinair AC1234-6) mopar.snapon.com

### Robinair R-1234yf A/C Machine DLC Connector

Oil Drain Identifier & Filter

Filter ISV

### Robinair R-1234yf A/C Machine 

## R-1234yf A/C machine print out provides: • Date & Time • Ambient Temp & Humidity • High & Low Side Pressures • Amount of R-1234yf Recovered • Amount of R-1234yf Charged • Purity of refrigerant & % of air • Vehicle Identification Number • Warranty code

### Adding Refrigerant Oil The Robinair machine meets oil cross-contamination requirements for high-voltage systems • Empty the oil drain bottle before starting a recovery • Oil collected drains into the graduated oil drain bottle • Remove the bottle and measure oil • Amount of oil removed from the A/C system is the amount of new oil to be charged into the A/C system after evacuation is complete • Add the recommendednewoil to replace the oil removed during the recycling process • A standalone R-1234yf Oil Injector is recommended to add oil. Robinair 18460 is available to FIAT Chrysler dealers through Mopar Service Equipment (MSE) mopar.snapon.comorwww.robinair.com

Robinair 18460 Oil injector for R-1234yf

### 2012 & later FIAT Chrysler vehicles with R134a or R-1234yf have fluorescent refrigerant leak detection dye installed at the factory • A wafer is installed into the receiver drier desiccant bag during manufacturing • Wafer dissolves when the A/C system is filled at the assembly plant & the dye then circulates throughout the system Factory installed Leak Detection Dye



## www.tracerline.com

### Mopar A/C Leak Detection Dye for service is supplied by Bright Solutions Leak Detection

Only use electronic leak detectors that conform to SAE J2913 for use with R-1234yf Mopar R134a Leak Detection Dye p/n - 04798219AB

‘Bright Solution’s announces that its A/C Dye Products have been successfully tested, approved and now certified to meet the new SAE J2297 Standard for both R134a and R-1234yf refrigerants 

### www.brightsol.com

### • Robinair 22791 R134a & R-1234yf Electronic Leak Detector is available to all FIAT / Chrysler dealers thru the Mopar Service Equipment (MSE)mopar.snapon.com • 3 sensitivity levels down to 0.15 oz./year • Automatically recalibrates in highly contaminated areas • Senses CFC, HFC, HCFC blends & R-1234yf refrigerants • Meets SAE J2913 for R-1234yf & SAE J2791 for R134a • Advanced infrared sensor designed to last 10 years • 8-hour lithium ion battery Robinair 22791 Leak Detector



## www.robinair.com

### KL / UF HVAC Controls

Manual or Dual Zone Automatic Temperature Control Radio with Touch Screen Controls for HVAC • CAN IHS Bus Message from Radio to HVAC Control Module

A/C Switch Panel • CAN IHS Bus Message to HVAC Control Module • HVAC Control Module is located behind the Radio

### KL / UF HVAC Sensors

Sun Load Sensor (Center of dash near defroster outlets)

Humidity Sensor (attached to windshield behind rear view mirror) Evap Temp Sensor

### KL / UF HVAC 5-wire Actuators 5-wire Actuators • Right & Left Blend Door • Recirc Door • Mode Door

### KL / UF HVAC Sensors

A/C Pressure Transducer 3-wire sensor mounted on liquid line Ambient Temp Sensor 2-wire thermistor mounted behind the grilleor in the left outside mirror on some models

### KL / UF HVAC In Car Temp Sensors Left & Right Floor Air Outlet Temp Sensors

Left & Right Panel Air Outlet Temp Sensors In-car Temp Sensor & Aspirator Motor

### KL/UF HVAC Housing

HVAC Housing

HVAC Module

Center Console Duct Heater Core Left Blend Door Mode Door IP Panel Duct Defroster Duct

Duct Outlet Temp SensorsHVAC Control Module – Direct Inputs • Evap Temp Sensor • Vent (Duct) Temp Sensors • Up to 4 with Dual Zone ATC • Left & Right Panel Outlet • Left & Right Floor Outlet • In Car Temp Sensor with aspirator motor • Door Actuators (5 wire) • Mode / Recirc / Left & Right Blend (Dual Zone) with 3-wire position sensors • Sun Sensor Assembly • Left & Right photo diodes (ATC) • Auto Headlamp sensor HVAC Module - Bussed Inputs • Ambient Temp Sensor (BCM) • Humidity Sensor (BCM) • A/C Pressure Transducer (PCM) • A/C Switch Panel Input HVAC Module - Direct Outputs • A/C Compressor Control Solenoid • Blower Motor Power Module • Door Actuators (5 wire) • 2 wire motor drivers for Mode / Recirc / Left & Right Blend (Dual Zone ATC) HVAC Module - Bussed Outputs • A/C Request to PCM • Rear Defroster Request to BCM 

### KL/UF HVAC Control Module

HVAC ModuleOAT

Organic Additive Technology 2013 - HOAT Hybrid Organic Additive Technology Orange or Pink based on vendor 2000 - 2012 IAT Inorganic Additive Technology – Up to 2000 

### Mopar Coolant Changes

## Mixing HOAT & OAT Coolants

• Mixing Coolants can cause gelling & plug the cooling system • Also nullifies the additive package = no corrosion protection • OAT Coolant is designed for newer engine materials, not recommended for 2012 & older vehicles • Not all OAT coolants are the same, each manufacturer has their own formulation • Flush vehicle twice with water if mixed

### 2013-15 Engine Oil & Change Intervals Current Engines requiring Synthetic Motor Oil • All Dodge Darts • 1.4L Turbo = SAE 5W-40 • 2.0L/2.4L = SAE 0W-20 • All SRT vehicles • All Jeep Renegades • All Alfa Romeo • RAM Trucks • 6.7L Cummins - 5W-40, up to 15,000 mile oil change interval • Ram 6.4L Hemi • All 2.4L Cherokee & Chrysler 200 • All 3.0L V6 EcoDiesel • ProMaster 3.0L Diesel • By 2016 Model Year over 50% of Chrysler & FIAT vehicles will require synthetic motor oil

### wiTECH 2.0 Scan Tool Application FASTER TECHNOLOGY Significant improvements to speed, performance & ease of use MOBILE ACCESSIBILITY -Web based application -Streamlined flash process -Easier updates, no software to install on your PC -2004 & later CAN Bus Vehicles -DRB Emulator (1998-2007)

-MicroPOD II hardware less expensive than VCI Pod or StarMOBILE50



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