| Checking glow plug system |
Note | Checking the function of the glow plug system of engine code “ATL” is described in the “Guided Fault Finding”. The glow plug system is activated via the automatic glow period control unit -J179-. |
| . The automatic glow period control unit -J179- is capable of self-diagnosis. A fault is stored in the engine control unit if a fault occurs in the glow plug system. |
| The automatic glow period control unit -J179- is located in the 3-position relay carrier in the front left footwell on relay socket 2. → Fig. |
| Special tools and workshop equipment required |
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| Hand-held multimeter -V.A.G 1526C- |
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| Auxiliary measuring set -V.A.G 1594C- |
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| Detach glow plug connectors from glow plugs. |
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| Connect hand-held multimeter -V.A.G 1526C- (voltage test range) to one glow plug connector and engine earth. |
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| Start final control diagnosis and activate glow plug relay. |
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| Specification: approx. battery voltage (every 5 seconds) |
| If specification is not obtained: |
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| Check glow plug relay -J52-. |
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| For this purpose, use vehicle diagnosis and service information system -VAS 5052-. |
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