2. Arrangement of fuses
Test sequence
- Check fuse N10/1f43 (Fuse 43) in relay box.
Figure legend/figure
- N10/1 (Driver-side SAM control unit with fuse and relay module)
Fuses
- FuseF43-F67
Relays
- I =N10/1kI (Circuit 87 relay, engine)
- K =N10/1kK (Circuit 87 relay, chassis)
- L =N10/1kL (Starter relay)
- M =N10/1kM (SEQ [ASG] pump control relay)
- N =N10/1kN (Circuit 15 relay)
- O =N10/1kO (FAN relay module)
- P =N10/1kP (Circuit 15R relay)
- R =N10/1kR (Air pump or oil cooler fan relay)
2181
The air mass measured by hot film MAF sensor is too low. / The cycle duration of the HFM signal is too long. (P0101)
Possible cause:
- B2/5 (Hot film mass air flow sensor)
Affected functions:
- Engine diagnosis
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Test 1: Check component B2/5 (Hot film mass air flow sensor).
1. Check component B2/5 (Hot film mass air flow sensor).
Test 1.1: Check signal of component B2/5 (Hot film mass air flow sensor) via actual value with engine OFF.
Test 1.2: Check signal of component B2/5 (Hot film mass air flow sensor) via actual value with engine speed greater than 3500 rpm.
Test 1.3: Check reference signal of component B2/5 (Hot film mass air flow sensor).
Test 1.4: Check power supply of component B2/5 (Hot film mass air flow sensor).
1.1. Check signal of component B2/5 (Hot film mass air flow sensor) via actual value with engine OFF.
Warning!Communication with ECU required.
1.2. Check signal of component B2/5 (Hot film mass air flow sensor) via actual value with engine speed greater than 3500 rpm.
Warning!Communication with ECU required.
