PSM / B1785 04
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Memory functions not working
Backrest Motor. Open Circuit
Fault symptom
Memory functions not working
On-board diagnosis
Type of diagnosis:
| Continually when the engine is run. |
Enable criteria:
| When seat operation is permitted. |
Fault criteria:
| • | Motor, Seat Back Forward |
| Voltage on the control module output is below 6 ±0.2V. |
| • | Motor, Seat Back Rearward |
| Voltage on the control module output is below B+ -0.7V. |
System reaction to a fault:
| Output is switched off, tries however to activate the engine once each time the ignition is switched on. |
Checking the wiring harness
Move the wiring harness at several spots and in several directions to reveal intermittent breaks and short-circuits. Check switches, connectors and crimp connections for oxidation, retracted pins and pin clamping force.
Diagnostic help
Diagnosis regards:
| Electrical fault in connecting leads or component. |
Functions in the diagnostic tool related to the fault:
| Motor, Seat Back Rearward |
| (See also description of readings/activations in diagnostic tool) |
