Checking voltage supply and ground
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Checking voltage supply and ground
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Theft alarm complete malfunction No contact with ISAT
Voltage supply
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1.
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Check that fuse 23 is intact and supplied with current.
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2.
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Connect BOB and check that there is voltage between the control module connector pin 13 and a good grounding point.
The voltage must be approximately 12 V. If the voltage is correct, proceed to step 4.
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3.
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Check the wiring harness for open circuit/short-circuit by measuring resistance between the fuse output and the control module connector pin 13.
The resistance should be < 1 Ohm.
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4.
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Check the theft alarm grounding by measuring the resistance between the control module connector pin 10 and a good grounding point.
The resistance should be < 1 Ohm.
If the resistance is correct, proceed to step 6.
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5.
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Check that the voltage is 0 V at connection 10 on the control module (control module disconnected) by measuring between the control module connection 10 and a good grounding point.
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6.
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If the malfunction remains despite the above checks, proceed with fault diagnosis on page
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