Diagnosis/troubleshooting PSM 5.3
DIAGNOSIS/TROUBLESHOOTING PSM 5.3 (FAULT CODE 4276)
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check supply voltage of the relay for the solenoid valve for open circuit |
|
>11 V Step 2 |
Open circuit in electric circuit between relay for solenoid valve socket pin 6 and relay for return pump pin 4 ->End |
| 2 | Check relay for solenoid valve for short circuit to ground |
|
Step 3 | Short circuit to ground between relay socket pin 6 and PSM control module pin 37 ->End |
| 3 | Check relay for solenoid valve for short circuit to B+/ open circuit in electric circuit |
|
>11 V Step 4 |
Short circuit t o B+/open circuit between relay for solenoid valve, socket pin 6 and PSM control module pin 37 ->End |
| 4 | Check relay for solenoid valve for short circuit to ground/ open circuit |
|
>11 V Step 5 |
Short circuit to ground / open circuit between fuse E9 and relay for solenoid valve socket pin 2 ->End |
| 5 | Check voltage supply for relay of solenoid valve for open circuit |
|
< 5 Step 6 |
Open circuit between relay for solenoid valves, socket pin 8 and PSM hydraulic unit pin 10 ->End |
| 6 | Relay for solenoid valves faulty | ->End | ||