Inspection Procedure

Check pattern select switch.
PREPARATION:

Disconnect the pattern select switch connector.

CHECK:

Check continuity between each terminal of pattern select switch connector when the select switch is set to PWR, NORM and SNOW positions

Fig 1: Checking Continuity Between Each Terminal Of Pattern Select Switch Connector
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OK:

Fig 2: Pattern Select Switch Continuity Chart
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1. NG: Replace pattern select switch.
2. OK: Go to next step.
Check harness and connector between A/C control assembly and pattern select switch and body ground (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE .
1. NG: Repair or Replace the harness or connector.
2. OK: Proceed to next circuit inspection shown on problem symptoms table (See PROBLEM SYMPTOMS ).