Alarm volumetric surveillance not working
- Make
- Fiat
- Model
- Croma Factory Service Manual
- Year
- 2005–2010
- Section
- Alarm › Alarm volumetric surveillance not working
ALARM VOLUMETRIC SURVEILLANCE NOT WORKING
When the alarm is switched on using the remote control, the system is activated correctly but the volumetric sensors do not intervene.
The volumetric sensors are located in the courtesy light module and are connected to the Body Computer Node via the dialogue line known as the A-BUS. The volumetric sensors are operated and controlled by the Body Computer node by means of a series of coded messages and can be excluded by the customer using the special button. If there is a failure the Body Computer Node detects and memorizes the causes of the malfunction
| Results of the tests | ||||
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
|---|---|---|---|---|
Connect the diagnostic equipment to the diagnostic socket and check the following at the Body Computer Node in parameters ambient: . the presence of the volumetric sensors in the errors ambient: . that there are no faults with the volumetric sensors | Move on to Step 2 | Volumetric sensors manually excluded | Switch on the volumetric sensors after getting permission from the customer | |
| Volumetric sensors not present | Check the conformity of the vehicle | |||
| Presence of faults | Proceed as instructed by the diagnostic tester | |||
| 2 | ULTRASOUND MODULE POWER SUPPLY CHECK | All OK | Problems encountered | Operation |
| Check that the ultrasound module is correctly supplied | Move on to Step 3 | Supply not correct | Restore correct power supply | |
| 3 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
Connect the diagnostic equipment to the diagnostic socket and check the following at the Body Computer Node in active diagnosis: - the operation of the volumetric modules - the condition of the A-Bus serial line | Move on to Step 4 | A-BUS serial line interruption | Restore the serial line | |
| Ultrasound module defective | Replace the courtesy light module with built in ultrasound sensors Op. 7040E51 FRONT MODULAR COURTESY LIGHT ASSEMBLY - R R FOR VERSIONS WITH SUN-ROOF | |||
| 4 | CHECK ON CORRECT OPERATION | All OK | Problems encountered | Operation |
| Check that the fault is no longer present | Fault persists | Body Computer defective | Replace Body Computer | |
Parts & tools for this job For 2005 Fiat Croma
- TOOLTorque wrenchSearch: 3/8 inch torque wrench
- TOOLSocket setSearch: socket set metric
- BOOKHaynes manualSearch: Haynes manual Fiat Croma
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