Interpreting XR25 bar graphs
NOTES Control units that only manage the seat belt pretensioner function do not have an XR25 diagnosis (check to be performed at the XRBAG).
| Make sure the XR25 tool is not the cause of the fault by trying to communicate with a control unit on another vehicle. Check that the ISO interface is set to position S8, that you are using the latest XR25 cartridge version, and that the correct access code is entered. Check the battery voltage and carry out the necessary repairs to obtain a compliant voltage (10.5 volts < battery voltage < 16 volts). |
| Check for the presence and condition of the airbag fuse. Check the ECU connector connection and the condition of its terminals. Check that the ECU is correctly supplied:
|
Check that the diagnostic socket is correctly supplied:
Check the continuity and insulation of the diagnostic connector / airbag control unit link lines:
|
| Check that the diagnostic connector is correctly powered: - + AVC on pin 16. - Ground on pin 5. Check the continuity and insulation of the diagnostic connector / airbag control unit link lines: - Between the terminal marked L and pin 15 of the diagnostic connector. - Between the terminal marked K and pin 7 of the diagnostic connector. |
AFTER REPAIR Once communication is established, deal with any fault bar graphs that are lit.
NOTE Without
Replace the airbag computer (refer to the "help" chapter for this procedure).AFTER REPAIR None
NOTES Use the XRBAG 30-pin adapter when working on the control unit connector.
I.dEF - 2.dEF
INSTRUCTIONS None
Carry out the necessary repairs to obtain a correct power supply voltage for the control unit: 10.5 volts ± 0.1 < correct voltage < 16 volts ± 0.1.- Battery charge check.
- Charging circuit check.
- Check the tightness and condition of the battery terminals.
- Check the control unit ground.
3.dEF
INSTRUCTIONS None
For an intermittent power interruption fault, check the control unit power supply lines:- Condition of the connectors at the control unit.
- Condition of the control unit ground (pin 9 of the 30-pin connector to ground at front right footwell).
- Condition / position of the fuse.
- Condition and tightness of the battery terminals.
dEF
INSTRUCTIONS None
The dEF display on the XR25 tool indicates minimum storage of 2 of the 3 faults declared by the display, and the bar graph is flashing.Action:
- Battery charge check.
- Charging circuit check.
- Check the tightness and condition of the battery terminals.
- Condition of the connectors at the control unit.
- Condition of the control unit ground.
- Condition / position of the fuse.
AFTER REPAIR Erase the control unit memory using command G0**.
NOTES Never take measurements on the igniter lines with any device other than the XRBAG.
| Lock the control unit using command G80* on the XR25 tool. Switch off the ignition and remove the 2 steering wheel airbag mounting screws. Check that it is correctly connected. |
| Disconnect the steering wheel airbag and connect an inert igniter to the igniter connector. Switch on the ignition and carry out a check with the XR25 tool. Replace the airbag module if the fault has become stored (fault no longer currently present). |
| Ignition off, disconnect then reconnect the clock spring connector. Work on the connectors if left bar graph 5 becomes lit and flashing. |
| Be sure to use the XRBAG tool to measure resistance at point C2 of the driver airbag circuit. If the value obtained is not correct, replace the clock spring. |
| Reconnect the clock spring, disconnect the control unit connector and fit the 30-pin adapter. Be sure to use the XRBAG tool to measure resistance on the cable marked B of the adapter. If the value obtained is not correct, check the connectors at the 30-pin connector (pins 10 and 11) and replace the wiring if necessary. |
| If the checks carried out have not revealed a fault, replace the airbag control unit (see the "help" chapter for this procedure). Reconnect the driver airbag igniter and refit the airbag module to the steering wheel. |
AFTER REPAIR Erase the control unit memory using command G0** then switch off the ignition.
Carry out a check with the XR25 tool and, if no fault is present, unlock the control unit using command G81*.
Destroy the airbag module if it has been replaced (tool Elé. 1287).
NOTES Never take measurements on the igniter lines with any device other than the XRBAG.
| Lock the control unit using command G80* on the XR25 tool. Switch off the ignition and remove the 2 steering wheel airbag mounting screws. Check the condition of the igniter cable. |
| Be sure to use the XRBAG tool to carry out the insulation measurement appropriate to the fault type at point C2 of the driver airbag circuit. If the value obtained is not correct, replace the clock spring. |
| Reconnect the clock spring, disconnect the control unit connector and fit the 30-pin adapter. Be sure to use the XRBAG tool to carry out the insulation measurement appropriate to the fault type on the cable marked B of the adapter. If the value obtained is not correct, check the connectors at the 30-pin connector (pins 10 and 11) and replace the wiring if necessary. |
| If the checks carried out have not revealed a fault, replace the airbag control unit (see the "help" chapter for this procedure). Reconnect the driver airbag igniter and refit the airbag module to the steering wheel. |
AFTER REPAIR Erase the control unit memory using command G0** then switch off the ignition.
Carry out a check with the XR25 tool and, if no fault is present, unlock the control unit using command G81*.
Destroy the airbag module if it has been replaced (tool Elé. 1287).
NOTES Never take measurements on the igniter lines with any device other than the XRBAG. On this vehicle, "line 1" corresponds to the single igniter line of the passenger airbag module.
Lock the control unit using command G80* on the XR25 tool.
Switch off the ignition, disconnect the control unit connector and fit the 30-pin adapter.
Be sure to use the XRBAG tool to measure resistance on the cable marked C of the adapter.
Is the value obtained correct?
| YES | If the value obtained is correct at the adapter cable C, check the condition of the connectors at the control unit. |
| NO | If the value obtained is not correct at the adapter cable C, check the connectors at the 30-pin connector (pins 6 and 7). |
| If the value remains incorrect, switch off the ignition and remove the dashboard to access the passenger airbag module wiring. Disconnect the igniter of the passenger airbag module, connect an inert igniter to the igniter connector, then repeat the resistance measurement on the cable marked C of the adapter with the XRBAG. If the value obtained is correct, replace the passenger airbag module. If the value obtained is still incorrect, replace the airbag wiring. |
|
| Reconnect the airbag control unit and the squib of the passenger airbag module, then switch the ignition on. Carry out a check with the XR25 diagnostic tool. If the tool still indicates the presence of the passenger airbag line fault (line 1) and the checks carried out have not revealed any fault, replace the airbag control unit (refer to the "help" chapter for this procedure). |
|
AFTER REPAIR Erase the control unit memory using command G0** then switch off the ignition.
Carry out a check with the XR25 tool and, if no fault is present, unlock the control unit using command G81*.
Destroy the passenger airbag module if it has been replaced (tool Elé. 1287).
NOTES Never take measurements on the igniter lines with any device other than the XRBAG. On this vehicle, "line 1" corresponds to the single igniter line of the passenger airbag module.
| Lock the control unit using command G80* on the XR25 tool. Switch off the ignition, disconnect the control unit connector and fit the 30-pin adapter. Be sure to use the XRBAG tool to carry out the insulation measurement appropriate to the type of fault on the cable marked C of the adapter. |
|
| YES | If the value obtained is correct at adapter cable C, check the condition of the connections at the control unit. |
| NO | If the value obtained is not correct at adapter cable C, check the connections at the 30-pin connector (pins 6/7). |
| If the value remains incorrect, replace the airbag wiring. | |
| Reconnect the airbag control unit and the squib of the passenger airbag module, then switch the ignition on. Carry out a check with the XR25 diagnostic tool. If the tool still indicates the presence of the passenger airbag line fault and the checks carried out have not revealed any fault, replace the airbag control unit (refer to the "help" chapter for this procedure). |
|
AFTER REPAIR Erase the control unit memory using command G0** then switch off the ignition.
Carry out a check with the XR25 tool and, if no fault is present, unlock the control unit using command G81*.
Destroy the passenger airbag module if it has been replaced (tool Elé. 1287).
NOTES Never take measurements on the igniter lines with any device other than the XRBAG.
| Lock the control unit using command G80* on the XR25 tool. Switch the ignition off and check that the driver's seat belt pretensioner squib is correctly connected. |
| Disconnect the driver's seat belt pretensioner squib and connect an inert squib to the squib connector. Switch on the ignition and carry out a check with the XR25 tool. Replace the driver's seat belt pretensioner if the fault has become stored (fault no longer reported as present). |
| Be sure to use the XRBAG tool to carry out the resistance measurement at point C1 (seat connector) of the driver's seat belt pretensioner line. If the value obtained is not correct, replace the wiring between points C1 and C3 (seat wiring). |
| Disconnect the control unit connector and fit the 30-pin adapter. Be sure to use the XRBAG tool to carry out the resistance measurement on the cable marked E of the adapter. If the value obtained is not correct, check the connections at the 30-pin connector (pins 1 and 2) and replace the wiring if necessary. |
| If the checks carried out have not revealed a fault, replace the airbag control unit (see the "help" chapter for this procedure). Reconnect the driver's seat belt pretensioner squib. |
AFTER REPAIR Erase the control unit memory using command G0** then switch off the ignition.
Carry out a check with the XR25 tool and, if no fault is present, unlock the control unit using command G81*.
Destroy the pretensioner if it has been replaced (tool Elé. 1287).
NOTES Never take measurements on the igniter lines with any device other than the XRBAG.
| Lock the control unit using command G80* on the XR25 tool. Switch the ignition off and check that the passenger's seat belt pretensioner squib is correctly connected. |
| Disconnect the passenger's seat belt pretensioner squib and connect an inert squib to the squib connector. Switch on the ignition and carry out a check with the XR25 tool. Replace the passenger's seat belt pretensioner if the fault has become stored (fault no longer reported as present). |
| Be sure to use the XRBAG tool to carry out the resistance measurement at point C1 (seat connector) of the passenger's seat belt pretensioner line. If the value obtained is not correct, replace the wiring between points C1 and C3 (seat wiring). |
| Disconnect the control unit connector and fit the 30-pin adapter. Be sure to use the XRBAG tool to carry out the resistance measurement on the cable marked D of the adapter. If the value obtained is not correct, check the connections at the 30-pin connector (pins 3 and 4) and replace the wiring if necessary. |
| If the checks carried out have not revealed a fault, replace the airbag control unit (see the "help" chapter for this procedure). Reconnect the passenger's seat belt pretensioner squib. |
AFTER REPAIR Erase the control unit memory using command G0** then switch off the ignition.
Carry out a check with the XR25 tool and, if no fault is present, unlock the control unit using command G81*.
Destroy the pretensioner if it has been replaced (tool Elé. 1287).
NOTES Never take measurements on the igniter lines with any device other than the XRBAG.
| Lock the control unit using command G80* on the XR25 tool. Disconnect the driver's seat belt pretensioner squib and connect an inert squib to the squib connectors. Switch on the ignition and carry out a check with the XR25 tool. If the fault has become stored (fault no longer reported as present), check the condition of the seat wiring. Replace the driver's seat belt pretensioner if the wiring is not faulty. Then carry out the same procedure on the passenger's seat belt pretensioner (if there is no fault on the driver's side). |
| Be sure to use the XRBAG tool to carry out the insulation measurement appropriate to the type of fault at point C1 (seat connector) of the driver's seat belt pretensioner line. If the value obtained is not correct, replace the wiring between points C1 and C3 (seat wiring). Then carry out the same measurement on the passenger's seat belt pretensioner line (if there is no fault on the driver's side). |
| Disconnect the control unit connector and fit the 30-pin adapter. Be sure to use the XRBAG tool to carry out the insulation measurement appropriate to the type of fault on the cables marked D (passenger) and E (driver) of the adapter. If any of the values obtained is not correct, check the connections at the 30-pin connector (pins 3/4 for cable D and 1/2 for cable E) and replace the wiring if necessary. |
| If the checks carried out have not revealed a fault, replace the airbag control unit (see the "help" chapter for this procedure). Reconnect the seat belt pretensioner squibs. |
AFTER REPAIR Erase the control unit memory using command G0** then switch off the ignition.
Carry out a check with the XR25 tool and, if no fault is present, unlock the control unit using command G81*.
Destroy the pretensioner(s) if they have been replaced (tool Elé. 1287).
NOTES Use the XRBAG 30-pin adapter to work on the control unit connector.
| Lock the control unit using command G80* on the XR25 tool. Check the condition of the warning lamp bulb. Ensure the link between the warning lamp and pin 8 of the 30-pin connector is isolated from the 12-volt supply. |
| If the checks carried out have not revealed a fault, replace the airbag control unit (see the "help" chapter for this procedure). |
AFTER REPAIR Erase the control unit memory using command G0** then switch off the ignition.
Carry out a check with the XR25 tool and, if no fault is present, unlock the control unit using command G81*.
NOTES Use the XRBAG 30-pin adapter to work on the control unit connector.
Warning lamp off with ignition on (APC)
INSTRUCTIONS None
| Lock the control unit using command G80* on the XR25 tool. Check the condition of the warning lamp bulb. Ensure continuity of the link between the warning lamp and pin 8 of the 30-pin connector. Ensure 12 volts is present at the warning lamp. |
| If the checks carried out have not revealed any fault, disconnect the control unit connector and fit the XRBAG 30-pin adapter. Use the XRBAG in its function for testing the warning lamp on the instrument panel, using the grey cable of the adapter. If the warning lamp can be lit using the XRBAG, replace the airbag control unit (refer to the "help" chapter for this procedure). If the warning lamp cannot be controlled, repeat the checks described above. |
Warning lamp on with ignition on (APC)
INSTRUCTIONS None
| Lock the control unit using command G80* on the XR25 tool. Ensure the link between the warning lamp and pin 8 of the 30-pin connector is isolated from earth. |
| If the checks carried out have not revealed a fault, replace the airbag control unit (see the "help" chapter for this procedure). |
AFTER REPAIR Erase the control unit memory using command G0** then switch off the ignition.
Carry out a check with the XR25 tool and, if no fault is present, unlock the control unit using command G81*.
INSTRUCTIONS None
This left bar graph 14 shows the locked state of the control unit.When lit, all firing circuits are inhibited, preventing deployment of the airbags and seat belt pretensioners.
This bar graph is normally lit in 2 cases:
- The control unit is new (it is sold locked).
- The lock command of the control unit was used with the XR25 tool during work on the vehicle (G80*).
AFTER REPAIR Erase the control unit memory using command G0** then switch off the ignition.
Carry out a check with the XR25 tool and, if no fault is present, unlock the control unit using command G81*.
INSTRUCTIONS None
This bar graph is normally lit in the following case:
Left bargraph 14 can therefore explain why an airbag or seat belt pretensioner did not deploy. |
| Refer to Techline if this bargraph is lit under other conditions (no fault, no impact, etc.). |
AFTER REPAIR Erase the control unit memory using command G0** then switch off the ignition.
Carry out a check with the XR25 tool and, if no fault is present, unlock the control unit using command G81*.
INSTRUCTIONS None
These left bar graphs 17, 18 and 19 show the control unit configuration and confirm that it is correctly matched to the vehicle.AFTER REPAIR Erase the control unit memory using command G0** then switch off the ignition.
Repeat the check with the XR25 tester.
Test yourself
A quick Renault Kangoo quiz: every answer comes with an explanation and a link to the manual page.