P1752

P1752

Diagnosis Information - PDK

Supply voltage, undervoltage

Diagnostic conditions
The control unit initially tests internal function sequences when the ignition is switched on (terminal 15). If they are OK, all diagnosable outputs are then tested and any faults are stored.
- Ignition on
- Engine running (stable engine speed 400 rpm)

Possible fault causes
- Control unit power supply lines faulty
- Connector corroded
- Generator faulty

Fault setting conditions
- Supply voltage < 7 V

Fault effects
- Power supply switch-off, pressure regulators and solenoid valves
- All pressure regulators and solenoid valves, switch-off
- Start enable only in position P
- Substitute value for accelerator pedal value
- Substitute value for brake
- No speed control
- No emergency program diagnosis
- Emergency hold function
- Transmission limp-home indication in instrument cluster control unit