New Beetle L5-2.5L (BPR) (2007)
Start diagnosis
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Remove the Motronic Engine Control Module (ECM) Power Supply Relay (J271).
Checking voltage
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Switch the ignition ON.
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Using a multimeter, check the Motronic Engine Control Module (ECM) Power Supply Relay Box socket 2 (relay terminal 30) to Ground.
Specified value: Battery voltage.
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Switch the ignition OFF.
If the specified value was Not obtained:
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Check the wiring connections from the Load Reduction Relay J59 to the Motronic Engine Control Module (ECM) Power Supply Relay (J271)
socket 2 for an open or a short circuit. Note: Fuse S-237 is between the J59 Load Reduction relay and the J271 ECM relay. Check for an open
S-237 fuse. If open, check for a short to ground between the fuse and ECM J271 relay.
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Check the wiring for open or short and connections for damage, corrosion, loose or broken terminals.
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If necessary, repair the faulty wiring or connection.
If the specified value was obtained:
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Switch the ignition ON.
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Using a multimeter, check the Motronic Engine Control Module (ECM) Power Supply Relay Box socket 3, (relay terminal 86) to Ground.
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Switch the ignition OFF.
Specified value: Battery voltage.
If the specified value was Not obtained:
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Check the wiring connections from the Load Reduction Relay J59 to the Motronic Engine Control Module (ECM) Power Supply Relay (J271)
socket 4 for an open or a short circuit. Note: Fuse S-237 is between the J59 Load Reduction relay and the J271 ECM relay. Check for an open
S-237 fuse. If open, check for a short to ground between the fuse and ECM J271 relay.
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Check the wiring for open or short and connections for damage, corrosion, loose or broken terminals.
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If necessary, repair the faulty wiring or connection.
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Repair as necessary.
If the specified value was obtained:
Checking activation
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Remove the Motronic Engine Control Module (ECM) Power Supply Relay (J271).
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Using a diode test lamp (12 V) connected to Battery +, check the Motronic Engine Control Module (ECM) Power Supply Relay Box socket 1
(relay terminal 85) while cranking the engine.
The test lamp should be ON.
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Switch the ignition OFF.
If the test lamp was ON:
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Replace the Motronic Engine Control Module (ECM) Power Supply Relay (J271):.
If the test lamp was not ON: