Diagnosis/troubleshooting PSM 5.7
DIAGNOSIS/TROUBLESHOOTING PSM 5.7 (FAULT CODE 4480)
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check supply voltage of the booster pump for short circuit to ground/open circuit |
|
>11 V Step 2 |
Short circuit to ground or open circuit between PSM control module plug pin 2 and fuse F1 ->End |
| 2 | Check signal lead of the booster pump for short circuit to voltage |
|
< 0.3V Step 3 |
Short circuit to voltage between PSM control module plug pin 4 and pin 1 of PSM booster pump plug ->End |
| 3 | Check signal lead of the booster pump for short circuit to ground |
|
Step 4 | Short circuit to ground between PSM control module plug pin 4 and pin 1 of PSM booster pump plug ->End |
| 4 | Check signal lead of the booster pump for short circuit to voltage |
|
< 0.3V Step 5 |
Short circuit to voltage between PSM control module plug pin 3 and pin 2 of PSM booster pump plug ->End |
| 5 | Check signal lead of the booster pump for short circuit to ground |
|
Step 6 | Short circuit to ground between PSM control module plug pin 3 and pin 2 of PSM booster pump plug ->End |
| 6 | Check activation of the booster with the PST2 |
|
>11 V Step 7 |
PSM control module faulty ->End |
| 7 | Booster pump faulty | ->End | ||