Additional heater ошибка

Цена вопроса: 0 ₽

всем привет, сделал диагностику, которая выявила ошибки по климе.

E R R O R M E MO R Y R E P O R T
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Date: 11/26/14 18:50:08
ECU: IHKA39_3
JobStatus: OKAY
Variant: IHKA39_3
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RESULT: 3 errors in error memory !
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41 Additional heater Error frequency : 254
Short circuit to ground
Error present
Errorcode: 29 42 FE 3C 30 43 B4 00 10 03 79
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21 Auxiliary water pump Error frequency : 214
Short circuit to batt+
Error present
Errorcode: 15 41 D6 30 30 3B 9C 02 10 03 89
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10 AUC sensor Error frequency : 58
Open circuit
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Errorcode: 0A 04 3A 48 48 1F 66 00 10 03 8D

тут все в принципе понятно, у меня не работает webasto встроенная, видимо первая ошибка — это как раз оно. подскажите куда копать дальше? где это замыкание на землю может быть? может есть какие-нить мысли? боюсь везти к диагностам, запарят свою песню про замену и тп. может че проверить можно сначала?

Additional heater fault table

Additional heater fault table

Notes:

• ◆ Listed below on the basis of fault codes are all the faults which can be detected by the -J162 additional heater control unit and displayed on VAS 5051.
• ◆ The fault memory can store a maximum of 3 faults. If a further fault occurs the fault that occurred first is erased. The ambient conditions under which each fault occurred are stored and can be interrogated using the «Read measured value block 08, display group 005 to 007» function .
• ◆ If faults only occur sporadically or if the fault memory is not erased after fault remedy, these faults are displayed as «sporadic faults» (display «/SP»). (The content of the fault memory is retained until it is erased, «non-volatile memory»).
• ◆ An indication of the type of fault may also appear in the fault table (a display marked * appears, as well as the component concerned or the «info» display).
• ◆ Once repairs have been completed, the fault memory must always be interrogated again with fault reader VAS 5051 and erased.
• ◆ Before replacing components, always use the current flow diagram to check the relevant positive and earth connections (terminals 30 and 31) and all connectors (between -J162 and the component indicated as being faulty).
• ◆ With all sporadic faults, it is particularly important to check the connectors for possible loose contacts.
• ◆ After replacing an additional heater component, always read out the fault memory, rectifying any faults that are indicated and erase them from the memory (functions 02 and 05).

• ◆ If no fault is detected despite complaints about the additional heater, the functions «Final control diagnosis 03» and «Read measured block 08» should be performed.
• ◆ If a fault occurs several times in a row (e.g. fault «loss of flame») the additional heater is locked after a fault has occurred 6 times and switching it on is only possible after erasing the fault memory.
• ◆ Check additional heater function

Notes:

• ◆ The fixed value for undervoltage cut-off is active with code «00002» or «00012». It can be entered or altered in the «Adaption» function => Page 01-67.
• ◆ The fixed value for the undervoltage cut-off is also active with coding «00001» or «00011» but is not displayed. If the voltage value was altered in a control unit encoded to «00002» or «00012» and the control unit is then recoded to «00001» or «00011» this fault can also be displayed in control units that are coded to automatic undervoltage cut-off. The automatic undervoltage cut-off is not provided for the additional heater.
• ◆ This fault can only be displayed for vehicles with additional heater in the event of e.g. contact resistance in the connection between additional heater and vehicle battery (the additional heater only operates with the engine running).

Notes:

• ◆ The Audi A2 currently has no -V55 recirculating pump for the additional heater installed.
• ◆ On vehicles without the recirculating pump for the additional heater, the coolant flow through the additional heater is determined by the engine coolant pump displacement. If this is too low e.g. during engine idling, then this fault may be stored.

Notes:

• ◆ If a -Q8 glow plug with flame detector fault is displayed together with the faults «misfire» or «repeated misfire», then first eliminate the cause for these faults.
• ◆ Should this fault be displayed also check the connector between control unit -J162 and the glow plug -Q8 for contact resistance (the glow plug is also the flame detector). As a very low current is flowing during interrogation of the flame monitor even a low contact resistance (e.g. due to contact pressure too low) can cause the storing of this fault.

Note:

Contact 6 of connector B is also connected to the engine control unit on the Audi A2 with diesel engine. Engine control unit uses clock signal to metering pump to incorporate fuel consumption of additional heater into consumption signal when engine is running.

=> Relevant Workshop Manual, Diesel Direct Injection and Glow Plug System; Repair group 01

Notes:

• ◆ The Audi A2 currently has no -V55 recirculating pump for the additional heater installed.
• ◆ If on a vehicle without -V55 recirculating pump the -J162 control unit is encoded for a version with recirculating pump, then this fault is displayed.

Notes:

• ◆ The signal for fresh air blower actuation is intended for the version with auxiliary heater. At present, installation of an auxiliary heater in the Audi A2 is not envisaged.
• ◆ The fault «not adapted to battery» is provided for the auxiliary heater version of the -J162 control unit. At present, installation of an auxiliary heater in the Audi A2 is not envisaged.
• ◆ The battery voltage drop during auxiliary heater operation is learned and stored in memory via battery adaption.

Notes:

• ◆ The cut-off due to undervoltage (Automatic) is intended for the version as auxiliary heater. At present, installation of an auxiliary heater in the Audi A2 is not envisaged.
• ◆ The «automatic» value for undervoltage cut-off is active with code «00001» or «00011». It is adapted in function «Basic setting» => Page 01-67.
• ◆ If further faults are displayed together with the fault «cut-off due to undervoltage (automatic)» first eliminate the cause for fault «cut-off due to undervoltage (automatic)».