[4] Check component B2/5 (Hot film mass air flow sensor).: Implausible value
[4] Check component B2/5 (Hot film mass air flow sensor).: Implausible value
Test 1: Check component B2/5 (Hot film mass air flow sensor).
1. Check component B2/5 (Hot film mass air flow sensor).
Voltage supply of component B2/5 (Hot film mass air flow sensor)
Figure legend
- B2/5x1Plug connection Hot film mass air flow sensor
Test sequence
- Switch off ignition.
- Detach coupling at component B2/5 (Hot film mass air flow sensor).
- Measure direct voltage with multimeter between sockets [B2/5x1] 3 and [B2/5x1] 4
- Switch on ignition.
Specified value
- Voltage[4,6...5,1] V
- Switch off ignition.
- Measure direct voltage with multimeter between sockets [B2/5x1] 3 and [B2/5x1] 2
- Switch on ignition.
Specified value
- Voltage[11...14] V
Question
- Is the measurement value OK?
YES
Signal wire Check component B2/5 (Hot film mass air flow sensor).
Special tools
- Test cable 271 589 00 63 00
- Socket box 129 589 00 21 00
Figure legend/figure
- B2/5 (Hot film mass air flow sensor)
- B2/5b1 (Intake air temperature sensor)
- B2/5x1Plug connection Hot film mass air flow sensor
Test prerequisite
- The actual value is not o.k.
Test sequence
- Switch off ignition.
- Unplug connector of control module and component.
- Connect 126-pole socket box at engine wiring harness.
- Measure resistance with multimeter between socket [1.64] 64 of the 126-pole socket box tester and socket [B2/5x1] 4
Specified value:
- Resistance <1 Ohm?
Question
- Is the measurement value OK?
YES
The measurement value is OK.End of test
NO
The measurement value is not OK.Possible cause and remedy
- Test lines between components N3/9 (CDI control unit) and B50 (Fuel temperature sensor) for Open circuit.
1. No further information available.
NO
The measurement value is not OK.Test wiring and plug connections between control module N3/9 (CDI control unit) and B2/5 (Hot film mass air flow sensor) for Short circuit and Open circuit, repair or replace if necessary.End of test