Legend Coupe V6-2675cc 2.7L SOHC FI (1988)
Idle Speed: Adjustments
Coupe
Idle Speed Inspection/Adjustment
1. Start the engine and warm it up to normal operating temperature (the cooling fan comes on).
2. Connect a tachometer.
3. Set the steering in the straight forward condition, and check idling in no-load conditions in which the headlights, blower fan, rear defroster, cooling
fan, and air conditioner are not operating. (All accessories turned off.)
Idle speed should be:
Manual: 680 ±50 rpm
Automatic: 680 ±50 rpm (in N or P)
4. Check the Yellow LED display at the ECU under the passenger's seat.
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If Yellow LED is off
Do not adjust idle adjusting screw.
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If Yellow LED is blinking
Adjust idle adjusting screw 1/4 turn clockwise.
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If Yellow LED is on
Adjust idle adjusting screw 1/4 turn counter-clockwise.
NOTE: On a new engine (less than 310 miles or 500 km) the Yellow LED may light even though the idle adjusting screw is properly set.
However, no adjustment should be made.
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Check that the Yellow LED goes off after approximately 30 seconds.
If it does not go off, rotate the idle adjusting screw by 1/4 turn in the same direction, and repeat the same operation until the Yellow LED goes
off.
5. Check the idle speed in the following conditions.
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With headlights (Hi) and rear window defogger ON.
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While the steering wheel is turning.
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With air conditioner compressor on.
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If, applicable, with Automatic transmission model when shifted in gear (except (N) or (P)).