Test Mode 2: Testing Sensor Signals

Test mode 2: Testing sensor signals

Test mode 2 enables the TCM input signals to be tested. On the AW 30-40 and AW 30-43, the test is carried out by activating the controls one by one. If the TCM receives an input signal, it responds with a special response code for each signal. Apart from checking the operation of the component, this function also provides a check that no open-circuits or short-circuits are present in the control wiring and connections.

Failure to receive a response code indicates that the TCM has not received a signal. In this case, troubleshooting should be carried out on the circuit of which the component in question is part.





Testing sensor signals with Volvo ST

- Move gear selector lever to position R and driving mode selector to position S.
- Search for text MODE 2: ACTIVATION Press * using arrow keys.
- Press * key.

Activate sensors by operating controls in order indicated in the table.





Testing sensor signals manually.
- Move gear selector lever to position R and driving mode selector to position S.
- Press DLC test button twice.

LED should commence to flash rapidly.
Activate sensors by operating controls in order shown in the table.

Table:

Order of testing, test mode 2

For best results, the components should be operated in the following order. Components may also be checked individually.

Note!
The TCM also receives a signal from the TCM. For this reason, the shift lock release must be used to move the gear selector lever from P to R in step two in the response code table.