Sunday, June 28, 2020

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 1120

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 1120

2.1.3.4.1.8. Steering column module

Warning!Communication with ECU required.

2025

Component B2/5b1 (Intake air temperature sensor) has a short circuit to ground. (P0112)

Possible cause:

- B2/5 (Hot film mass air flow sensor)

Affected functions:

- Engine diagnosis

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Test 1: Check component B2/5b1 (Intake air temperature sensor).

1. Check component B2/5b1 (Intake air temperature sensor).

Test 1.1: Check component B2/5b1 (Intake air temperature sensor) using actual value.

Test 1.2: Check plausibility of actual value B2/5b1 (Intake air temperature sensor) in control module ME 9.7.

Test 1.3: Check internal resistance of component B2/5b1 (Intake air temperature sensor).

1.1. Check component B2/5b1 (Intake air temperature sensor) using actual value.

Test prerequisites

- Switch off ignition.

- Leave vehicle with engine hood open for > 12 h.

Note

- The test prerequisites must be fulfilled for the test result to be meaningful.

Test sequence

- Switch on ignition.

Status of relevant actual value:

- Intake air temperature:Warning! Communication with ECU required.

- Ambient temperature:Warning! Communication with ECU required.

Specified value

- The intake air temperature may be max. 5掳 C below the ambient temperature or 15掳 C above the ambient temperature.

Question

- Is the actual value for intake air temperature OK?

YES

The actual value is okay.Further procedure

- If only fault codes 1599 and 1600 occur in control unit ME-SFI, erase the fault memory.

- The component may not be replaced.

End of test

NO

The actual value is not o.k.Possible cause and remedy

- Check plausibility of actual value B2/5b1 (Intake air temperature sensor) in control module N3/10 (ME-SFI [ME] control unit).

- Check internal resistance of component B2/5b1 (Intake air temperature sensor).

1.2. Check plausibility of actual value B2/5b1 (Intake air temperature sensor) in control module ME 9.7.