Q7 Quattro V8-4.2L (BAR) (2008)
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Control Module: Testing and Inspection
Transmission Control Module Voltage Supply, Checking
Transmission Control Module Voltage Supply, Checking
Special tools, testers and auxiliary items required
‹› Multimeter.
‹› Wiring diagram.
Requirements
‹› The Transmission Control Module (TCM) (J217) fuses OK.
‹› The Power Supply Relay (terminal 15) (J329) OK.
‹› The battery voltage must be at least 12.5 volts.
‹› The Ground (GND) connections at the transmission OK.
‹› The parking brake engaged.
‹› The selector lever of automatic transmission in position "P".
‹› All electrical consumers switched off.
‹› The ignition switched off.
Test procedure
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Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Powertrain Management/Computers and
Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Preliminary Check.
Start diagnosis
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Remove the Transmission Control Module (TCM) (J217). Refer to => [ Transmission Control Module, Replacing ] See: Service and
Repair/Transmission Control Module, Replacing.
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Disconnect the Transmission Control Module (TCM) (J217) electrical harness connector - 3 -.
