A/C - Revised Diagnostic Charts

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Bulletin: 90-1-13

Date: June '90

Ref. No.: 90-153-1

Corp. Ref. No.: 071202


SUBJECT:
SERVICE MANUAL UPDATE - SECTION 1B -
REVISED A/C DIAGNOSTIC CHARTS

MODELS AFFECTED:
1989 SKYHAWK
1989 - 1990 SKYLARK


The following changes should be made in the "Air Conditioning" section 1B, within the diagnostic charts entitled "V-5 System Air Conditioning Diagnosis Insufficient Cooling."

Starting on page:
1B-12 for 1989 Skyhawk and Skylark
1B-13 for 1990 Skylark

On the second page of step 4 under the pressure graph there are four boxes containing information.

The small box on the left should contain the following information:
Low and high side pressures
intersect in the black area of
the chart. DO STEP 6.

The small box on the right should contain the following information:
Low and high side pressures
intersect in the gray area of
the chart. DO STEP 5.

Also the pages/steps following this correction should read:
"Step 5 - GREY zone performance checks"
"Step 6 - BLACK zone performance checks"

Be sure to mark these corrections in your service manuals for future reference.