2001 Land Rover Discovery Series II Support Question
2001 Land Rover Discovery Series II Support Question
Find answers below for this question about 2001 Land Rover Discovery Series II.Question posted by jlanderos56 on June 19th, 2012
Service Engine Light
Current Answers
Answer #1: Posted by patgannon on March 24th, 2016 2:12 PM
Member since:
March 24th, 2016 Points: 50
P1551 IACV closing coil malfunction Open circuit - closing winding
There are eight IACV diagnostic checks performed by the ECM:
l Output short circuit to earth - opening coil
l Output short circuit to battery supply - opening coil
l Output open circuit - opening coil
l Output short circuit to earth - closing coil
l Output short circuit to battery voltage - closing coil
l Output open circuit - closing coil
l Blocked IACV - rev/min error low (engine speed must be 100 rev/min less than the target speed, engine load
less than 2.5 and the measured air flow more than 10 kg/h less than the expected air flow for a fault condition to be flagged).
l Blocked IACV - rev/min error high (the engine speed must be more than 180 rev/min greater than the target
speed and the measured air flow more than 10 kg/h greater than the expected air flow for a fault condition to be flagged).
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