The diagnostic equipment signals the following error: "U1700 - Body Computer (NBC)"
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This error is signalled if the control unit does not detect the body computer |
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Test results |
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1 |
CAN CONTROL UNITS FAULT DIAGNOSIS |
All OK |
Problems encountered |
Operation |
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Carry out a fault diagnosis using the equipment on the CAN control units to check for the presence of grade C DTC, in particular checking that there are no errors at the NBC |
Move on to Step 2 |
1. Presence of errors at CAN control units 2. Errors present in the Body Computer |
1. Continue following the instructions given by the diagnostic equipment. 2. Continue following the instructions given by the diagnostic equipment. |
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2 |
CAN IMPEDANCE CHECK |
All OK |
Problems encountered |
Operation |
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Detach the body computer connector and check, using the tester, that the control unit side circuit resistance is 120 Ohms like on the connector side Check the body computer supply voltage |
Move on to Step 3 |
1. CAN faulty 2. Body Computer power supply missing |
1. Move on to Step 3 2. Restore the correct power supply. |
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3 |
ELECTRICAL CHECKS |
All OK |
Problems encountered |
Operation |
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Check body computer wiring |
Move on to Step 4 |
Wiring faulty |
Restore the correct connection |
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4 |
CORRECT OPERATION CHECK |
All OK |
Problems encountered |
Operation |
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Use the diagnostic instrument to delete the error and check that the fault is no longer present |
End of diagnosis |
The fault persists. |
Move on to Step 1. |
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