Esi25App

[Virtual Presenter] 4/21/25, 4:43 PM Esi25App ESI[tronic] 21.04.2025 VW (Volkswagen) / CrossPolo / CrossPolo 1.9 TDI / 1.9 l / 74 kW / 10/2006 / ATD  This information was not exactly created for the selected vehicle - there may be deviations. Test sequence - Air mass meter Functional description Open instruction Possible fault codes: 4065 / Air mass meter . / Signal improbable 4490 / Air mass meter . / Open circuit/ground short 4491 / Air mass meter . / Short to B+ 4492 / Air mass meter . / Power supply Possible actual values: Air-mass, nominalOpen instruction Air-mass, actualOpen instruction Limitation amt. (due to air mass)Open instruction Image 1  Check power supply: Plug connection of component < Air mass meter> unplugged. Measurement on wiring harness end term. 2 (+) to term. 3 (-). Ignition on. Set value: Measurement (URI measuring instrument) Measurement (URI measuring instrument) Actual value --- V  Read value Set value 12 V ... 15 V Measurement on wiring harness end term. 4 (+) to term. 3 (-). https://www.bosch-esitronic.com/client.esi25.app/app/#/6cab5e85-3bf2-4eea-ac96-9de57e916145/manuals/cc162db3-b48b-42cb-8c85-6add53411571… 1/3.

[Audio] 4/21/25, 4:43 PM Esi25App Ignition on. Set value: Measurement (URI measuring instrument) Measurement (URI measuring instrument) Actual value --- V  Read value Set value 4.8 V ... 5.2 V Check signal voltage: Plug connection of component < Air mass meter> plugged in. Use suitable adapter lead(s). Measurement term. 5 (signal) to ground. Set value(s): Ignition on. Measurement (URI measuring instrument) Measurement (URI measuring instrument) Actual value --- V  Read value Set value 0.8 V ... 1.2 V Engine idling. Measurement (URI measuring instrument) Measurement (URI measuring instrument) Actual value --- V  Read value Set value 1.6 V ... 2.2 V Engine in full load operation. https://www.bosch-esitronic.com/client.esi25.app/app/#/6cab5e85-3bf2-4eea-ac96-9de57e916145/manuals/cc162db3-b48b-42cb-8c85-6add53411571… 2/3.

[Audio] 4/21/25, 4:43 PM Esi25App Measurement (URI measuring instrument) Measurement (URI measuring instrument) Actual value --- V  Read value Set value 3.5 V ... 4.0 V Other possible faults: Open circuit or short to positive/ground in wire(s). No or poor plug connection conduction. Component < Air mass meter> defective despite successful testing. Component  A1.1 Engine control unit faulty. Check the following systems/components: ■  A9.1 System power supply: Open instruction Image 1  Robert Bosch GmbH, all rights reserved https://www.bosch-esitronic.com/client.esi25.app/app/#/6cab5e85-3bf2-4eea-ac96-9de57e916145/manuals/cc162db3-b48b-42cb-8c85-6add53411571… 3/3.