Pressure sensor PSM 5.3
The pressure sensor is located on the booster pump on the PSM 5.3.
DIAGNOSIS/TROUBLESHOOTING PSM 5.3 (FAULT CODE 4460)
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check stop light switch |
|
Step 2 | Repair stop light switch ->End |
| 2 | Visual inspection |
|
Step 3 | Repair pressure sensor plug ->End |
| 3 | Check supply voltage of the pressure sensor for short circuit to ground/open circuit |
|
approx. 5 V Step 4 |
Short circuit to B+ between PSM control module plug pin 69 and pin 3 of the booster pump pressure sensor plug, or PSM contol module faulty ->End |
| 4 | Check ground of pressure sensor for open circuit |
|
approx. 5 V Step 5 |
Open circuit in circuit between PSM control module plug pin 67 and pin 1 of the booster pump pressure sensor plug, or PSM contol module faulty ->End |
| 5 | Check signal lead of the pressure sensor for short circuit to B+ |
|
< 0.3V Step 6 |
Short circuit to B+ between pin 2 of booster pump pressure sensor plug and PSM control module plug pin 68 ->End |
| 6 | Check signal lead of the pressure sensor for short circuit to ground |
|
Step 7 | Short circuit to ground between pin 2 of booster pump pressure sensor plug and PSM control module plug pin 68 ->End |
| 7 | Check signal lead of the pressure sensor for open circuit |
|
< 5 Step 8 |
Open circuit between pin 2 of the booster pump pressure sensor plug and PSM control module plug pin 68 ->End |
| 8 | Pressure sensor faulty (replace booster pump) |
->End | ||