Measurement 4

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WARNING: Incorrect handling of high-voltage components

Electric shock
Short circuit
Fire
Explosion
→ Only appropriately trained and authorized persons are permitted to work on high-voltage vehicles and components.

→ Required qualification: High voltage technician or high voltage expert.

→ Observe national requirements and legislation for this work.

→ Always use insulated tools, e.g. > VAS 6883 - Insulated Tool Set when working on these components.

→ Observe general warning notes for working on the high-voltage system.

> 2X00IN GENERAL WARNING NOTES FOR WORKING ON THE HIGH-VOLTAGE SYSTEM

Preliminary work for measurement 4 (V8 engine)

Remove front right wheel housing liner.
Refer to the appropriate service information.
Unclip connector at connection point (electric air-conditioning compressor) from holder.

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Connection point electric air-conditioning compressor (front view)

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Connection point electric air-conditioning compressor (right wheel housing view)
Release and open plug connection at the connection point.
Perform measurement 4.

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Measurement 4 (shown as an example)
Measure resistance at service disconnector, pin 3 and connector at connection point for electric air-conditioning compressor (female), pin 2.
Refer to the wiring diagram for the pin assignment of the connectors
1. 5.1 Setpoint value < 0.5 Ohm
Evaluating measurement 4
1. 6.1 If the measured value is within the tolerance range, continue with measurement 4.1 .
2. 6.2 If the measured value is outside of the tolerance range, visually inspect connectors and repair them if necessary. After carrying out repairs, repeat measurement 2.
Perform measurement 4.1.

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Measurement 4.1 (shown as an example)
Resistance measurement on connector at connection point for electric air-conditioning compressor (male), pin 2 and pin 3
Refer to the wiring diagram for the pin assignment of the connectors
1. 8.1 Setpoint value <1.0 Ohm
Evaluating measurement 4.1
1. 9.1 If the measured value is within the tolerance range, continue with measurement 5 .
2. 9.2 If the measured value is outside the tolerance range, visually inspect connectors (also on electric air-conditioning compressor) and repair if necessary.
  After carrying out repairs, repeat measurement 2.