Fault-Tracing Information

Fault-tracing

Checking the status




Check whether the fault is permanent or intermittent by reading the signals from the fuel, outside and engine temperature sensors.

Note! In order for the correct values to be shown, reading of the temperatures must take place at the moment of start.

- Start the engine.
Check that the intake temperature is reasonable. The temperature must correspond to the ambient temperature.
The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.

Hint: Remove the air temperature sensor, but let the connector remain connected. Let the hood remain open, the sensor should then indicate the same temperature as the outdoor temperature.









Continue - Checking the component and wiring

-------------------------------------------------

Checking the component and wiring








- Ignition off.
- Unplug the air temperature sensor connectors.
- Check the connectors. Check for loose connections. Check for contact resistance. Check for oxidation.
Check the resistance of the sensor between #1 and #2 (to the sensor).
Remedy as necessary.

Other information
- Connecting the breakout box, B5254T7 Connecting the Breakout Box, Engine Control Module (ECM)
- Signal specification, B5254T7 Signal Specification
- Checking wiring and terminals Checking Wiring and Terminals













Continue - Verification

-------------------------------------------------

Verification




Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reconnect the connectors, reinstall components etc.
- Ignition on.
Read off the air temperature sensor signal. Check that the signal is plausible, compare with the external temperature.





Is the value OK?

Yes - VERIFIED

No - VERIFICATION FAILED

------------------------

VERIFICATION FAILED - Fault-tracing information

VERIFIED - FAULT FOUND

-------------------------------------------------

Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - Exit fault-tracing

No - Attempt New Test

------------------------

Attempt New Test - Checking the status

-------------------------------------------------