Removing and installing high-voltage wire for electrical air conditioner compressor — AUDI

🧭 Before you start

Fits: Audi A8 D4 (4H, 2010–2017)

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• Check that the red warning label on the power and control electronics for electric driveJX1 is present and take care not to damage it.
• Check that the red warning label on the electrical air conditioner compressor V470 is present and take care not to damage it.

🔧 Engine codes this applies to

📋 Procedure

1. ⚠ Working on vehicles with high-voltage wiring:Do not support yourself or tools on high-voltage wiring or associated components --> this can damage the insulation. High-voltage wiring must not be excessively bent or kinked --> this can damage the insulation. The round high-voltage connectors are colour-coded with an external coloured ring and are provided with mechanical coding or guide lugs. It is important to observe this coding when joining up the round high-voltage connectors, otherwise the connectors can be damaged. — De-energise high-voltage system. [Note: De-energising high-voltage system:Connect vehicle diagnostic testerSelect Guided Fault Finding modeUsing the Go to button, select the following menu options in succession:Selecting function/componentBodyElectrical systemSelf-diagnosis-compatible systems8C - Hybrid battery management -J8408C - Hybrid battery management, functions51 - De-energise high-voltage system (Rep. gr. 93)]
2. ⚠ High voltage can cause fatal injuryDanger of severe or fatal injuries from electric shock The high-voltage system may only be de-energised by a suitably qualified person (Audi high-voltage technician). It must be definitely confirmed that the high-voltage system is de-energised. The system may only be de-energised using the vehicle diagnostic tester via "“Guided Fault Finding”". The qualified person (Audi high-voltage technician) confirms that the system is de-energised and uses the locking cap T40262 to ensure that the system cannot be re-energised. The ignition key and the maintenance connector for high-voltage system TW are then stored in a safe place by the qualified person.The qualified person (Audi high-voltage technician) marks the vehicle by attaching the appropriate warning signs. — Disconnect 12 V batteries Electrical system27Battery; Disconnecting and connecting battery.
3. Remove front left headlight Electrical system94Headlights; Removing and installing headlights.
4. Remove upper longitudinal member General body repairs, exterior50Lock carrier; Exploded view - lock carrier.
5. Unplug connector to bonnet lock (left-side) above cover of power and control electronics for electric driveJX1.

6. Remove bolts (arrows) on cover (1) and take cover off power and control electronics for electric driveJX1(2).
7. Check that the red warning label on the power and control electronics for electric driveJX1 is present and take care not to damage it.
8. Pull catch (5) in direction of (arrow).
9. Disconnect high-voltage wire for electrical air conditioner compressor P3(3) from power and control electronics for electric driveJX1 as described below.
10. Use release tool T40258 to release and unplug high-voltage connector for high-voltage wire for electrical air conditioner compressor P3 from right side.
11. ⚠ Do not use excessive force when releasing and unplugging the high-voltage connectors.To release the catch, first press gently on the high-voltage connector you wish to unplug and then pull the connector upwards.Never use levering tools to release and unplug the high-voltage connectors.Only unplug high-voltage connectors by pulling them upwards. Do NOT rotate or tilt them; this could damage the coding on the high-voltage wires. — Release and unplug high-voltage wire for electrical air conditioner compressor P3(1) on electrical air conditioner compressor V470(2) in direction of (arrow) using release tool T40258.
12. Check that the red warning label on the electrical air conditioner compressor V470 is present and take care not to damage it.
13. Remove high-voltage wire for electrical air conditioner compressor P3 upwards out of vehicle after loosening wiring clips. [Note: All cable ties which have been released or cut through during removal must be re-attached in the same position on installation.Tighten all screw connections to the tightening torques specified.When installing leadthrough in luggage compartment floor, make sure that it engages and seals securely.]
14. ⚠ Working on vehicles with high-voltage wiring:Do not support yourself or tools on high-voltage wiring or associated components --> this can damage the insulation. High-voltage wiring must not be excessively bent or kinked --> this can damage the insulation. The round high-voltage connectors are colour-coded with an external coloured ring and are provided with mechanical coding or guide lugs. It is important to observe this coding when joining up the round high-voltage connectors, otherwise the connectors can be damaged. — Check that the red warning label on the electrical air conditioner compressor V470 is present and take care not to damage it.
15. Re-energise high-voltage system. [Note: Re-energising high-voltage system:Connect vehicle diagnostic testerSelect Guided Fault Finding modeUsing the Go to button, select the following menu options in succession:Selecting function/componentBodyElectrical systemSelf-diagnosis-compatible systems8C - Hybrid battery management -J8408C - Hybrid battery management, functions51 - Re-energise high-voltage system (Rep. gr. 93)]

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