Toyota Tundra (2015 year). Manual — part 2305
Last Modified: 9-16-2014
6.6 A
Doc ID: RM0000030JG03RX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: AIR CONDITIONING: PRESSURE SWITCH: INSTALLATION; 2015 MY Tundra [08/2014 - ]
INSTALLATION
1. INSTALL PRESSURE SWITCH
Compressor oil:
ND-OIL 8 or equivalent
(b) Using a 27 mm seep socket wrench, install the pressure switch.
Text in Illustration
*a
Hold
*b
Turn
Torque:
10.8 N·m {110 kgf·cm, 8ft·lbf}
(c) Connect the connector.
2. CHARGE REFRIGERANT
3. WARM UP ENGINE
4. CHECK FOR LEAKAGE OF REFRIGERANT
5. INSTALL RADIATOR GRILLE SUB-ASSEMBLY
AIR CONDITIONING: PRESSURE SWITCH: INSTALLATION; 2015 ...
Last Modified: 9-16-2014
6.6 G
Doc ID: RM000001R8Z04GX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: AIR CONDITIONING: REFRIGERANT: ON-VEHICLE INSPECTION; 2015 MY Tundra [08/2014 - ]
ON-VEHICLE INSPECTION
1. INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET
(a) This method uses a manifold gauge set to locate problem areas. Read the manifold gauge pressure when
these conditions are established.
Test conditions:
Temperature at the air inlet is 30 to 35°C (86 to 95°F).
Engine is running at 1500 rpm.
All doors are fully open.
Blower speed control switch is at HI.
Air inlet control set at "RECIRC"
A/C switch is ON.
Gauge readings (Reference)
Text in Illustration
*a
Pressure on low-pressure side
kPa (kgf/cm
2
, psi)
*b
Pressure on high-pressure side
kPa (kgf/cm
2
, psi)
*c
Blower HI Zone
*d
Blower LO Zone
AIR CONDITIONING: REFRIGERANT: ON-VEHICLE INSPECTION; ...
(1) Normally functioning refrigeration system
Gauge reading:
PRESSURE
SIDE
REFRIGERANT VOLUME
Low
147 to 245 kPa (1.5 to 2.5 kgf/cm
2
, 21 to 36 psi)
High
1373 to 1569 kPa (14 to 16 kgf/cm
2
, 199 to 228
psi)
(2) The A/C system periodically changes between normal and improper function due to moisture in the
refrigerant system.
SYMPTOMS
PROBABLE CAUSE
DIAGNOSIS
CORRECTIVE
ACTIONS
During operation,
pressure on low
pressure side cycles
between normal and
vacuum
Moisture in refrigeration system
freezes at expansion valve orifice,
state is restored.
- Drier is overly saturated
- Moisture in refrigeration
system freezes at
expansion valve orifice and
blocks refrigerant
circulation
1. Replace cooler
drier
2. Remove moisture
from cycle by
repeatedly
evacuating air
3. Supply
appropriate volume
SYMPTOMS
PROBABLE CAUSE
DIAGNOSIS
CORRECTIVE ACTIONS
- Pressure low on both
low and high pressure
Gas leakage from
refrigeration
- Insufficient
refrigerant
1. Check for gas leakage and repair if necessary
SYMPTOMS
PROBABLE CAUSE
DIAGNOSIS
CORRECTIVE ACTIONS
sides
- Cooling performance
insufficient
system
- Refrigerant
leakage
3. If indicated pressure value close to 0 when
connected to gauge, create vacuum after
SYMPTOMS
PROBABLE CAUSE
DIAGNOSIS
CORRECTIVE
ACTIONS
- Pressure low on both low and high
pressure sides
- Frost exists on piping from
condenser to A/C unit
Refrigerant flow obstructed by dirt
in condenser
Condenser
clogged
Replace condenser
(5) The A/C system does not function or functions intermittently because the refrigerant does not circulate.
SYMPTOMS
PROBABLE CAUSE
DIAGNOSIS
CORRECTIVE ACTIONS
- Vacuum indicated on low pressure
side, and extremely low pressure
indicated on high pressure side
- Frost or condensation seen on
- Refrigerant flow
obstructed by moisture or
dirt in refrigeration system
- Refrigerant flow
obstructed by gas leakage
from expansion valve
Refrigerant
does not
circulate
1. Check expansion valve
refrigerant
2. Clean expansion valve
by blowing air
3. Replace condenser
4. Evacuate air and charge
5. For gas leakage from
expansion valve, replace
expansion valve
AIR CONDITIONING: REFRIGERANT: ON-VEHICLE INSPECTION; ...
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