Transverse Acceleration Sensor (AY Sensor): Diagnosis/Troubleshooting
DIAGNOSIS/TROUBLESHOOTING - FAULT CODE 4400
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check fault memory |
|
|
|
| 2 | Check positive supply to sensors for open circuit |
|
> 11 V Step 3 |
Open circuit between pin 39 of PSM control unit plug and pin 3 of transverse acceleration sensor plug Repair wiring harness End |
| 3 | Check ground supply line to sensors for short circuit to B+ |
|
< 0.3 V Step 4 |
Short circuit to B+ between pin 21 of PSM control unit plug and pin 6 of transverse acceleration sensor Repair wiring harness End |
| 4 | Check ground supply line for open circuit |
|
< 5 Step 5 |
Open circuit between pin 21 of PSM control unit plug and pin 6 of transverse acceleration sensor plug Repair wiring harness End |
| 5 | Check signal lead of transverse acceleration sensor for short circuit to B+ |
|
< 0.3 V Step 6 |
Short circuit to B+ between pin 8 of PSM control unit plug and pin 5 of transverse acceleration sensor Repair wiring harness End |
| 6 | Check signal lead of transverse acceleration sensor for short circuit to ground |
|
< 5 Step 7 |
Short circuit to ground between pin 8 of PSM control unit plug and pin 5 of transverse acceleration sensor plug Repair wiring harness End |
| 7 | Check signal lead of transverse acceleration sensor for open circuit |
|
< 5 Step 8 |
Open circuit between pin 8 of PSM control unit plug and pin 5 of transverse acceleration sensor plug Repair wiring harness End |
| 8 |
|
End | ||