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Mid 146 Sid 250 J1708 Information Link - Volvo Trucks Mid 146 Service Manual Fault codes, climate control cu-bas, cu-mcc, cu-ecc, vn, vhd version2 Hide thumbs 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52

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Group 87 Climate Control, Fault Codes

MID 146 SID 250 J1708 Information Link

General information Diagnostic signals along with general information are sent on the SAE J1587/1708 data link. In case of failure this information link serves as a back up to the SAE J1939 control data link. The status of the vehicle is constantly kept updated on the SAE J1587/1708 and is available to be read via the diagnostic connector. On the control link SAE J1939 the system's control signals are sent. Fault code FMI 9 Abnormal update rate Conditions for fault code: • An fault code is stored if information about the vehicle speed is not received on the SAE J1708 data link within 60 seconds. • An fault code is stored if information about the engine speed is not received on the SAE J1708 data link within 60 seconds. • An fault code is stored if information about the engine coolant temperature (ECT) is not received on the SAE J1708 data link within 60 seconds. Possible cause: • Faulty control unit • Datalink congestion Reaction from the control unit: • Fault code is stored • Yellow lamp requested Noticeable external symptoms: • Yellow lamp lights up • Limited function in the climate control unit appropriate check: • Fault-trace the SAE J1708 data link, see service information group 371 "Data links, fault-tracing". 42 Troubleshooting Table of Contents Previous Page Next Page

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