Toyota Sienna Service Manual: Refrigerant
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 1,500 rpm.
- All doors are fully open.
- Blower speed control switch is at HI.
- Temperature control switch is at MAX. COOL.
- A/C switch is ON.
(b) Gauge readings (Reference)
(1) Normally functioning refrigeration system
Gauge reading 
(2) The A/C system periodically changes between normal and improper function due to moisture in the refrigerant system.
(3) The A/C system does not function effectively due to insufficient cooling.
(4) The A/C system does not function effectively due to poor circulation of the refrigerant.
(5) The A/C system does not function intermittently because the refrigerant does not circulate.
(6) The A/C system does not function effectively due to overcharged refrigerant or insufficient cooling of the condenser.
(7) The A/C system does not function due to air in the refrigeration system.
| CAUTION: The low-pressure piping may be very hot and cause serious burns. |
(8) The A/C system does not function effectively due to an expansion valve malfunction.
(9) The A/C system does not function due to a defective compressor.
Gauge readings (Reference)
Terminals of ecu
1. A/C AMPLIFIER
HINT:
Check from the rear of the connector while it is
connected to the A/C amplifier.
(a) Waveform 1:
(b) Waveform 2: ...
Replacement
1. DISCHARGE REFRIGERANT FROM
REFRIGERATION SYSTEM
SST 07110-58060 (07117-58080, 07117-58090,
07117-78050, 07117-88060, 07117-88070,
07117-88080)
(a) Turn the A/C switch to ON.
(b) Operating t ...
Other materials:
Removal
CAUTION:
Wear safety gloves, because the sharp surfaces of the
seatback frame and seat adjuster may injure your
hand.
Work must be started more than 90 seconds after the
ignition switch is turned to the LOCK position and the
negative (-) terminal cable is disconnected from ...
Inspection
1. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH (w/o Memory)
Disconnect the mirror connector.
Check operation of the outer mirror.
Apply battery voltage and inspect operation of
the mirror face, as shown in the table and
illustration.
Standard (LH)
If the result i ...
How to proceed with
troubleshooting
HINT:
Troubleshoot in accordance with the procedures on the
following pages.
1 VEHICLE BROUGHT TO WORKSHOP
2 CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK
3 PROBLEM SYMPTOMS TABLE
When problem is not listed on problem symptoms table,
proceed to A.
When problem is listed on pro ...
