Engines / UDS Engines by part number / 01 - Engine [EV_ECM20TDI01104L906016PQ 004001] / Test - low heat performance relay (J359)

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Mark	Model	Control unit	Diagnostic operation

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Select a vehicle make or a common group such as Service Intervals, Engines, Transmissions, Immobilizers and Independent Heaters.

Model

Part 1 of the order number Select the first three characters of the order number of the engine control unit. This number can be found in the VCDS when linked to the uniform in the SW order number field. Do not insert the ordering number from the control unit packaging here!!!

Select the first three characters of the order number of the engine control unit. This number can be found in the VCDS when linked to the uniform in the SW order number field. Do not insert the ordering number from the control unit packaging here!!!

Control unit Select the desired control unit as accurately as possible. The UDS identifier EV_xyz can be found in the VCDS after connecting to the control unit and then in the Extended Identification.

Select the desired control unit as accurately as possible. The UDS identifier EV_xyz can be found in the VCDS after connecting to the control unit and then in the Extended Identification.

Diagnostic operation Select the desired diagnostic procedure.

Diagnostic procedure

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Note:
- check component: fuse - small heat capacity relay

Conditions:
- Heater: ventilation ON - position I.

X)
Connect the ampere meter in series to the battery circuit.

X)
connect with the control unit XX - engine

XX - Actuators

select item in drop-down menu:

IDEXXXXX - small heat capacity relay (JXXX)

Start

physically test the function of the activated component - active XXs

desired condition:
- small heat capacity relay - active / inactive
- The value of the current drawn from the battery must change in leaps according to the excitation of the relay

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