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TCM E39 / P0748 00

Read the instructions below then start the fault diagnostic procedure.

Symptom: Message appears in display.

  P0748 00


Solenoid SLT Circuit, Wrong Current

Fault symptom

Message appears in display.

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Battery voltage must be between 10.2 - 15.5 V.
Engine speed over 400 rpm.
Selector lever in position D.
TCM not in Limp Home
The following diagnostic trouble codes may not be generated:
P0962
P0963

Fault criteria:

Power consumption outside of limits.
Control module's measured values indicate that the solenoid is stuck.

System reaction to a fault:

Limp home

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:

Test value:
SLT Commanded Pressure
SLT Commanded Current
SLT Actual Current
Activation:
SLT Commanded Current
(See also description of readings/activations in diagnostic tool)