Speed sensor lead, front right: Diagnosis/troubleshooting
DIAGNOSIS/TROUBLESHOOTING CHART - FAULT CODE 4200
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Visual inspection |
|
Step 2 |
-> End |
| 2 | Checking speed sensors |
|
1 k to 3 k Step 3 |
> 3 k or < 1 k Step 9 |
| 3 | Checking function of speed sensor |
|
Measureable AC voltage, approx. same level as to speed sensor of an opposite wheel at same wheel speed. Step 5 |
No AC voltage measureable. Step 5 |
| 4 | Mechanical function |
|
Step 9 | Clean toothed ring and replace, if necessary. -> End |
| 5 | Checking leads of speed sensor for short circuit to B+ |
|
< 0.3 V Step 6 | Short circuit to B+ between PSM control unit plug pin 15 or pin 16 and speed sensor pin 4 or pin 5. Repair wiring harness. -> End |
| 6 | Checking leads of speed sensor for short circuit to ground |
|
Step 7 | Short circuit to ground between PSM control unit plug pin 15 or pin 16 and speed sensor pin 4 or pin 5. Repair wiring harness. -> End |
| 7 | Checking leads of speed sensor for open circuit |
|
0 Step 8 |
Open circuit in leads of speed sensor. Repair wiring harness. -> End |
| 8 | Checking leads of speed sensor for short circuit with respect to each other |
|
Step 10 | Short circuit in leads of speed sensor with respect to each other. Repair wiring harness. -> End |
| 9 |
|
-> End | ||
| 10 |
|
-> End | ||