Testing And Replacing; Auxiliary Throttle Valve (Ads) (M62 And M62 Tu Engine). Replacing - BMW 5251 Service Manual

Fuel Injection
Intake air temperature ([AT) sensor,
testing and replacing
Disconnect harness connector from intake air temperature
sensor (A) at air filter housing.
Turn ignition on. Using a digital voltmeter, check for 5 volts
between supply voltage wire in connector and ground. If volt-
age is not present, test ECM inputs/outputs as described lat-
er.
With harness connector disconnected, test resistance across
sensor terminals. If any faults are found, replace IAT sensor.
IAT test resistance
0
l V * l a c (50" i-2°F)
7-1 1.6 k.0.
0 2 0 ' k l ° C
(68'
322°F) 2.1-2.9
it.0.
0 8 0 " ? l a c (176" i-2°F) 0.27-0.40
itn
Auxiliary throttle valve (ADS)
(M62 and M62 TU engine), replacing
ADS
components
540i models with ASC and DSC are fitted with a motor-driv-
en auxiliary throttle valve and housing ahead of the standard
Throttle position switch
throttle housing. The ADS throttle valve controls engine throt-
tle intervention based on signals from the DME control mod-
ule if road conditions, such as slipping driven wheel, warrant
reduced engine power.
ADS throttle housing
Bowden cable
NOTE-
Before replacing the ADS throttle housing, read DME fault
ADS lhroltle actualor
codes.
-
ADS throttle housing replacement:
Switch off ignition and disconnect electrical connector on
ADS throttle body.
Remove hose from idle control valve.
Loosen hose clamps and remove throttle housing air in-
take boot.
Disconnect cable from ADS throttle body.
-
Unscrew 3 bolts and remove ADS throttle body.
Installation is reverse of removal.
-
Adjust cable so that no free play is present.