Electric Drive Power And Control Electronics, Removing And Installing: Removing

WARNING: This page is about a different car, the 2022 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

High voltage increases the risk of fatal injury

Electrocution can cause severe bodily or fatal injury.

- Have an Audi high-voltage technician (HVT) or an Audi high-voltage expert (HVE) de-energize the high-voltage system.

-- De-energize the high-voltage system. Refer to HIGH-VOLTAGE SYSTEM, DE-ENERGIZING .

If the control module is replaced, select the "Replace control module" function for the respective control module on the Vehicle Diagnostic Tester.

-- With the ignition switched off, disconnect the ground cable from the battery. Refer to BATTERY .

-- Remove the left impact guard. Refer to UNDERBODY TRIM PANEL .

-- Drain the coolant. Refer to COOLANT, DRAINING AND FILLING, VEHICLE WITH HIGH-VOLTAGE SYSTEM, HIGH-VOLTAGE SYSTEM COOLANT CIRCUIT .

-- Loosen the hose clamps -4- and remove the coolant hoses.

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-- Remove the pressure balance hose -5- to do so push the catches on both sides.

-- Disconnect the connector -3-.

-- Remove the nut -2-.

-- Move the potential equalization cable -1- to the side.

-- Release the catch and open the cover -5- in direction of -arrow-.

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-- Remove the nut -4-.

-- Free up the wire -3-.

-- Remove the nut -2-.

-- Free up the coolant lines -1- on the threaded pin.

-- Remove the nut -5-.

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-- Free up the wiring harness -4-.

-- Remove the bolts -arrows-.

-- Remove and free up the High-Voltage Wiring Harness for High-Voltage Battery -PX1- -1- and Drive Motor High-Voltage Wiring Harness -PX2- -3-.

-- Release and remove the Electrical A/C Compressor High-Voltage Cable -P3- -2-.

-- To do so remove the connector lock -3- in direction of -arrow A-.

Fig 1: High-Voltage Connector, Releasing

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-- Press the release -4- in the direction of -arrow B- and remove the connector -1- approximately 5 mm up to the next release level.

-- Press the release -5- in the direction of -arrow D- and remove the connector from the connector mount -2- in direction of -arrow C-.

If the connector is damaged then the high-voltage cable set must be replaced.

-- Remove the nuts -1, 4 and 5-

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-- Remove the electric drive power and control electronics -3- in direction of -arrow- while pushing the coolant lines -2- slightly to the side.