V90 L6-2.9L VIN 96 B6304S (1998)
Engine Control Module: Service and Repair
Connecting and Disconnecting ECM
The ignition must be switched OFF at all times when connecting or disconnecting the engine control module (ECM).
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Turn ignition OFF.
Control Modules
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Do not expose the control modules to temperatures above +80°C (+176°F). Remove control modules if the car is to be stored for example.
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Remove control modules when arc welding.
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DO NOT replace a module without checking the associated wiring and components, otherwise new part may be damaged by same fault as original.
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Switch OFF ignition and wait for 150 seconds when:
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connecting and disconnecting test instruments.
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connecting and disconnecting the ECM.
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taking reading using an ohmmeter.
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When the engine is started a lot of fuel is injected into the engine. Trying to restart the engine too soon after a previous attempt risks injecting too
much fuel into the engine. This can result in the engine not starting. The ECM has a function that keeps it active 150 seconds after a previous start
attempt, even though the engine may have been switched OFF. This limits the amount of fuel injected when restarting the engine.
