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Home >> Honda >> 1991 >> Prelude L4-2056cc DOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Engine Difficult to Start When Cold
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Engine Difficult to Start When Cold

Check:
1. Coolant Temperature (TW) Sensor (6)
2. Idle Control System
a. Fast Idle Valve
3. Manifold Absolute Pressure (MAP) Sensor (3)(5)
4. Atmospheric Pressure (PA) Sensor (13)
5. TDC/CRANK Sensor (4)(8)
6. CYL Sensor (9)
7. PGM-FI Control (ECU) Unit (BU)

NOTE:
After each symptom, the system that could be the source of the symptom are listed and should be checked in the order they are listed, beginning with #1.

(BU) code used when the CHECK ENGINE warning light is on, and the self-diagnosis indicator LED is ON with no "blinks", the back-up system is in operation.

Self-diagnosis indicator, (LED) blinks (?), will follow associated systems.
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