P1613

DTC P1613
Highside switch control cannot switch off or has S/C to +12V.

Possible causes by suggested order of priority:
- C193/53 (OLG) shorted to +12V.
- C193/30 (OP) shorted to +12V.
- C193/33 (OW) shorted to +12V.
- C193/32 (SO) shorted to +12V.
- ECU fault.

C193/53 (OLG) shorted to +12V.
CHECK THE FOLLOWING:
- C193/53 (OLG) shorted to +12V.
- Disconnect EAT C193 before measuring voltage between C193/53 (OLG) and vehicle earth.
ACCEPTABLE RESULTS
Between 0.0V and 4.0V.
DIAGNOSTIC HINTS
- If the voltage is above the acceptable range check the harness connected to C193/53 (OLG) for short circuit to +12V

C193/30 (OP) shorted to +12V.
CHECK THE FOLLOWING:
- C193/30 (OP) shorted to +12V.
- Disconnect EAT C193 before measuring voltage between C193/30 (OP) and vehicle earth.
ACCEPTABLE RESULTS
Between 0.0V and 4.0V.
DIAGNOSTIC HINTS
- If the voltage is above the acceptable range check the harness connected to C193/30 (OP) for short circuit to +12V

C193/33 (OW) shorted to +12V.
CHECK THE FOLLOWING:
- C193/33 (OW) shorted to +12V.
- Disconnect EAT C193 before measuring voltage between C193/33 (OW) and vehicle earth.
ACCEPTABLE RESULTS
Between 0.0V and 4.0V.
DIAGNOSTIC HINTS
- If the voltage is above the acceptable range check the harness connected to C193/33 (OW) for short circuit to +12V

C193/32 (SO) shorted to +12V.
CHECK THE FOLLOWING:
- C193/32 (SO) shorted to +12V..
- Disconnect EAT C193 before measuring voltage between C193/32 (SO) and vehicle earth.
ACCEPTABLE RESULTS
Between 0.0V and 4.0V.
DIAGNOSTIC HINTS
- If the voltage is above the acceptable range check the harness connected to C193/32 (SO) for short circuit to +12V

ECU fault.
CHECK THE FOLLOWING:
- Ensure all of the checks for short to +12V have been carried out.
- If these problems are not present check transmission ECU by substitution with a known good unit.
POSSIBLE FAULTS
- Faulty transmission ECU.