ENGINE MANAGEMENT SYSTEM - V8
There are eight IACV diagnostic checks performed by the ECM:
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Output short circuit to earth – opening coil
Output short circuit to battery supply – opening coil
Output open circuit – opening coil
Output short circuit to earth – closing coil
Output short circuit to battery voltage – closing coil
Output open circuit – closing coil
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).
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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).
Should a malfunction of the component occur, the following fault codes may be evident and can be retrieved by
TestBook.
P Code
P1510
P1513
P1514
P1553
P1552
P1551
P0505
J2012 Description
IACV opening coil malfunction
IACV opening coil malfunction
IACV opening coil malfunction
IACV closing coil malfunction
IACV closing coil malfunction
IACV closing coil malfunction
Idle control system malfunction
Land Rover Description
Short circuit to battery supply - opening winding
Short circuit to earth - opening winding
Open circuit - opening winding
Short circuit to battery supply - closing winding
Short circuit to earth - closing winding
Open circuit - closing winding
Blocked IACV - high or low rev/min error
DESCRIPTION AND OPERATION 18-2-37
| Categories | Land Rover Defender, Land Rover Discovery II, Range Rover |
|---|---|
| Tags | Land Rover |
| Model Year | 1999 |
| Download File |
|
| Document Type | Workshop Manual |
| Language | English |
| Product Name | Discovery Series II |
| Product Brand | Land Rover |
| Document File Type | |
| Publisher | landrover.com |
| Wikipedia's Page | http://en.wikipedia.org/wiki/Land_Rover |
| Copyright | Attribution Non-commercial |
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