Retrieving DTCs
- Diagnosis is carried out and Diagnostic Trouble Codes (DTCs) are accessed by using diagnostic units in engine compartment. See Fig 1
. DTCs can be read manually through position No. 3 in diagnostic unit "A", and interpreted using ABS DIAGNOSTIC TROUBLE CODES
(DTCs) table.
- Diagnostic unit "A" has a Black housing. Diagnostic unit "B" has a Gray housing. Both diagnostic units have Black covers. Diagnostic unit "A" contains a diagnostic lead, LED, button for selecting different test functions, and 6 position sockets. Diagnostic unit "B" contains 6 position sockets only. To access DTCs, connect diagnostic lead to socket position No. 3 on diagnostic unit "A". Turn ignition on.
- Each test function can be activated by pressing button on diagnostic unit "A" same number of times as test function identification number. DTCs are displayed in order of priority. Most serious DTCs are displayed first. If memory is full, DTC with lowest priority will be overwritten if a new DTC is added.
- DTCs are displayed as a combination of 3 digits. Each digit corresponds to number of flashes. In addition, 3 digit DTCs can be entered into system to change output parameters. DTCs should be entered with short (one second) and precise pressure on button. Wait until LED is lit steadily, enter first digit, wait until LED lights steady, enter second digit, again wait until LED lights steady, and enter third digit.
Courtesy of VOLVO CARS OF NORTH AMERICA