Check voltage between terminals PSW of AC amplifier and body ground

PREPARATION:

(a) Install the manifold gauge set (See page AC-18).

(b) Remove the center cluster module control with connectors still connected.

(c) Turn ignition switch ON. CHECK:

Check voltage between terminals PSW of A/C amplifier connector and body ground when refrigerant pressure is changed. OK:

The voltage changes refrigerant pressure, as shown in the chart below.

Low Pressure Cut Side

Referaence

High Pressure Cut Side

ON (0 V)

ON (0 V)

196 kPa \

f 225 kPa

2,550 kPa

Î ,

1 3,140 kPa

OFF (12V)

OFF (12V)

Proceed to next circuit inspection shown on problem symptoms table (See page DI-886).

I18170

PREPARATION:

Disconnect pressure switch connector. CHECK:

Check continuity between terminals 1 and 4 of pressure switch when refrigerant is changed.

The continuity changes with refrigerant pressure as shown in the chart below.

Low Pressure Cut Side

Referaence : High Pressure Cut Side

ON (Continuity)

ON (Continuity)

196 kPa 1

1 1

1 3,140 kPa

OFF (No continuity)

OFF (No continuity)

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