C3 Picasso ETG 6G gearbox fault

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steenschalls
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C3 Picasso ETG 6G gearbox fault

Post by steenschalls »

In the family we have a C3 Picasso 2012 with a semi auto gearbox. Now and then we receive gearbox fault in the display. We have a fault code P0948, which says, relay stays in open position. The readout says, elec pump motor control fault. The motor is sitting on the oil pump which gives pressure to clutch and gearchange operation. Can anyone tell us where the relay is, or if it sits inside the motor?

Regards
Steen Jorgensen
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GiveMeABreak
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Re: C3 Picasso ETG 6G gearbox fault

Post by GiveMeABreak »

Ok, so here's the diagram for your vehicle.

Have a look at 1660 on the diagram which is the Piloted Gearbox ECU. Look at the Pin 1 of the 12 Pin Black connector at the bottom row, which as per the fault code is suggested you check.
Fault Code: P0948
Description of Fault: Electro-pump unit electric motor control fault: Relay jammed open.
Open circuit or short circuit to positive or short circuit to earth (Pin 1 of the 12-way connector of the ECU)
Conditions for Fault to clear: No faults for 1 second
Downgrade Modes whilst Fault is active: If the vehicle has the Stop and Start system : Stop and start function deactivated
Symptoms: Warnings:
  • "SERVICE" warning lamp
  • Sport warning lamp
  • Snow warning lamp
  • Automatic or 6-speed piloted manual gearbox warning lamps (Orange PRND triangle)
  • Display of a "-" on the fascia panel
Symptoms:
  • Difficult/impossible to change a gear
  • Lack of power
  • Absence of automatic stopping of the internal combustion engine
  • Leaks
Suspect Areas:Frequent causes:
  • - Electric motor
  • - Electro-pump
  • - 30 A fuse relating to pin 5 of the ECU connector
Other possible causes
  • - electrovalves
  • - Controlled manual gearbox ECU
  • - Leak/kinking in the hydraulic piping
  • - Connectors
  • - Electrical harness

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steenschalls
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Re: C3 Picasso ETG 6G gearbox fault

Post by steenschalls »

thank you, can I ask you to confirm some of the components? Ex 1669, 1633 etc
regards
Steen