Toyota Highlander Service Manual: On-vehicle inspection
1. INSPECT PRESSURE SWITCH NO.1.
(a) Magnetic clutch control: Inspect pressure switch operation.
- Set on the manifold gauge set.
- Connect the positive (+) lead from the ohmmeter to terminal 4 and the negative (-) lead to terminal 1.
- Check continuity between terminals when refrigerant pressure is changed, as shown in the illustration.
If operation is not as specified, replace the pressure switch.
(b) Cooling fan control: Inspect pressure switch operation.
- Connect the positive (+) lead from the ohmmeter to terminal 2 and the negative (-) lead to terminal 3.
- Check continuity between terminals when refrigerant pressure is changed, as shown in the illustration.
If operation is not as specified, replace the pressure switch.
2. INSPECT AIR CONDITIONER AMPLIFIER ASSY CIRCUIT
(a) Disconnect the connectors from the A/C amplifier assy and inspect the connector on the wire harness side, as shown the chart.
If the circuit is as specified, try to replace the A/C amplifier assy with a new one. If the circuit is as specified, inspect the circuits connected to other parts.
(b) Connect the connector to A/C amplifier assy and inspect the wire harness side connector from the back side, as shown in the chart.
*1:If the circuit is as specified, try to replace the A/C amplifier assy with a new one. If the circuit is as specified, inspect the circuits connected to other parts.
*2: w/ Navigation System.
*3: w/o Navigation System.
Precaution
1. DO NOT HANDLE REFRIGERANT IN AN ENCLOSED
AREA OR NEAR AN OPEN FLAME
2. ALWAYS WEAR EYE PROTECTION
3. BE CAREFUL NOT TO GET LIQUID REFRIGERANT IN YOUR EYES OR ON YOUR SKIN
If liquid refr ...
Inspection
1. COOLER THERMISTOR NO.1(MANUAL AIR CONDITIONER)
(a) Remove cooler thermistor No. 1.
(b) Check resistance between terminals 1 and 2 of cooler
thermistor No. 1 at each temperature, as shown in ...
More about Toyota Highlander:
Inspection
1. INSPECT MASS AIR FLOW METER
(a) Check the output voltage.
Apply battery voltage across terminals 1 (+B) and 2
(E2G).
Connect the positive (+) tester probe to terminal
VG, and negative (-) tester probe to terminal E2G.
Blow air into the Mass Air Flow (MAF) meter, ...
