Heat Output And Temperature Door Activation, Checking
Installed on vehicles with high voltage systems (hybrid vehicles)
- The ignition is turned on and the ready mode is active, the engine runs or starts only, when heated refrigerant is necessary to reach the temperature setting in the vehicle interior or for example the Traction Battery -A2- (hybrid battery) has not been charged enough.
- With the ignition turned on and the temperature preselect "warm" on the Climatronic Control Module -J255- display and control head ("HI" in the display and control head and in the MMI display).
Risk of unintended engine start
The ignition must be turned off and the ignition key must remain outside of the vehicle when working on vehicles with a high voltage system.
Handling high voltage cables:
- Do not stand on or place tools on high voltage cables and their components as it may damage the cable insulation.
- Never bend or kink high voltage cables forcefully as it may damage the cable insulation.
- The round high voltage connectors are color coded with an external color ring and are mechanically coded using the guide- or code tabs. Always make certain that the coding matches when connecting the round connector in order to avoid any mechanical damage the high voltage connector.
There is a risk of electrocution from damaged high voltage components.
Observe the following when working around high voltage components and high voltage wires:
- Never work around high voltage components and cables with cutting, deformed, or sharp edged tools, or heat sources such as welding or soldering tools, heated air, and thermal glue.
- Inspect the high voltage components visually before beginning.
- Perform a visual inspection of the Electric Drive Power and Control Electronics -JX1-, the Electro-Drive Drive Motor -V141-, the Electrical Air Conditioning (A/C) compressor -V470- and the high voltage lines when working in the engine compartment.
- Perform a visual inspection of the high voltage lines and covers when working on the underbody.
- Perform a visual inspection of the high voltage lines and the Electrobox with the High Voltage System Maintenance Connector -TW- when working in the luggage compartment.
- Perform a visual inspection on all of the potential equalization cables.
Observe the following items when performing the visual inspection:
- The components do not display any signs of external damage.
- The high voltage cable insulation and the potential equalization cables are not damaged.
- The high voltage cables do not display any abnormal deformations.
- Every high voltage component is marked with a red warning label.
Working on a high voltage system when activated or with the ignition turned on
The engine may start unexpectedly when performing work while the ignition is turned on or when the ready mode is activated and may cause poisoning in enclosed spaces. Be aware of body limbs and/or clothing when clamping or pulling.
Perform the following steps before turning on the ignition:
- Move the selector lever into position P.
- Activate the parking brake.
- Switch off ignition.
- Open the engine hood.
- Connect the charging unit for example Battery Charger :VAS 5095A to the battery jump start terminal for the 12V vehicle electrical system
- Switch on the ignition.
-- Charge the vehicle battery, for example, using the Battery Charger:VAS5904 in the battery support mode to minimize the number of automatic starts during the test- and measuring procedures while the ready mode is active, refer to[FOR ENGINE(S) CTUB, CEJA, CGTA, CDRA, CEUA, CPNA] BATTERY, CHARGING and the appropriate service information .
-- Move the selector level into position "P", activate the parking brake and arrange the necessary tools for testing and measuring procedures that require the ready mode to be active or that require the ignition to be on, so that they cannot come into contact with the turning components in the engine and so that they are not in the vicinity of the turning components of a running engine.
Also move the selector lever into position "P" and activate the parking brake for testing and measuring procedures which require the ignition to be on, but do not require the ready mode to be active.
The ready mode is displayed in the Instrument Cluster Control Module -J285- above the "power meter", refer to the Owners Manual.
Activate and deactivate the ready mode, refer to the Owners Manual. (consult the display in the Instrument Cluster Control Module -J285-).
-- Activate the ready mode (observe the display in the Instrument Cluster Control Module -J285-), refer to the Owners Manual.
All Vehicles
Test requirements are met, refer to HEATING OUTPUT AND TEMPERATURE DOOR ACTIVATION, TESTING REQUIREMENTS .
- For heating output and activation of the temperature doors, refer to HEATING OUTPUT AND TEMPERATURE DOOR ACTIVATION, CHECKING .