Honda Acura NSX 1991 Service Manual page 245

When the idle speed is out of specification and the Check Engine warning light does not blink CODE 14, check the
1 .
following items:
Adjust the idle speed (page 1 I-84)
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Air conditioning signal (page 1 I-72)
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Alternator FR signal (page 1 I-74)
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A/T shift position signal (page 1 I-76)
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M/T neutral switch signal (page 1 I-78)
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M/T clutch switch signal (page 1 l-80)
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Starter switch signal (page 1 I-82)
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Fast idle valve (page 1 I-83)
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Hoses and connections
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EACV and its mounting O-rings
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2. If the above items are normal, substitute a known-good EACV and readjust the idle speed (page 11-84).
14) after EACV replacement, substitute a known-good ECU and recheck. If symptom goes away, replace the
original ECU.
1 l-69