Fault-finding table (page 3 of 3)
- Make
- Alfa Romeo
- Model
- 145/146 Electrical System Diagnosis Manual, Volume 3
- Year
- 1994–2001
- Section
- Power Windows
145 electrical system diagnosisFault-finding table · page 3 of 3
Work with the component fitted on its connector, working from the cable inlet side
| CHECK POWER WINDOW CONTROL UNIT (N38) (version for fusebox "B") | TEST B | ||
|---|---|---|---|
| TEST PROCEDURE | RESULT | CORRECTIVE ACTION | |
| B1 | CHECK VOLTAGE – With the key turned to MARCIA, check for 12V between pins 2 and 1 of connector B of N38 | OK | Carry out step B2 |
| NOT OK | Check fuse G311. Restore the wiring between N38 B and G311 and between N38 B and earth G148b | ||
| B2 | CHECK VOLTAGE – With the key turned to MARCIA, check for 12V between pin 1 of connector B and pin 1 of connector A of N38 | OK | Carry out step B3 |
| NOT OK | Check fuse F17 of G1. Restore the wiring between N38 A and G1 | ||
| B3 | CHECK MANUAL OPERATION – Operating the front driver's side window switch B53, check for 12V between pins 3 and 4 of connector B of N38; this voltage ceases as the action on the button ceases | OK | Carry out step B5 |
| NOT OK | Carry out step B4 | ||
| B4 | CHECK MANUAL OPERATION – Operating switch B53, check for 12V between pins 3 and 4 of connector A of N38 | OK | Change device N38 |
| NOT OK | Restore the wiring between N38 A and switch B53, or change the latter | ||
| B5 | CHECK AUTOMATIC OPERATION – With the key turned to MARCIA, operating switch B53 check for: • continuous 12V between pins 3 and 4 of connector B if the button is pressed for less than 300 ms • no voltage if the button is pressed for less than 50 ms • continuous 12V between pins 3 and 4 of connector B keeping the button pressed | OK | DEVICE N38 NOT WORKING PROPERLY. Check the connections with the other components |
| NOT OK | Change the device N38 | ||
Parts & tools for this job For 1994 Alfa Romeo 145/146
- TOOLTrim removal tool kitSearch: trim removal tool kit
- PARTTouch-up paintSearch: Alfa Romeo touch up paint
- PARTPanel clip assortmentSearch: Alfa Romeo panel clips assortment
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