P1852

P1852, P1853
Solenoid 1-2/3-4 (S1)

Fault symptoms
CHECK GEARBOX warning lamp on.
TCM in Limp-Home mode.

Conditions
P1852: Short circuit to ground.
P1853: Short circuit or open circuit to B+.

Diagnostic help
The status of the 1-2/3-4 shift solenoid (S1) can be ascertained with the diagnostics instrument. The 1-2/3-4 shift solenoid (S1) should be activated (ON) in 1st and 3rd gears when the car is being driven and not activated (OFF) in the other gears. The 1-2/3-4 shift solenoid (S1) can be activated with the diagnostics instrument.
- Activate "Solenoid 1-2/3-4 (S1)"






Diagnostic procedure

1 Check the control module outputs to solenoid 1-2/3-4 (S1).
- Unplug connector Hi 6-3 by the battery tray.
- Connect a test lamp between pin 1 in the female connector and a good grounding point.
- Connect a diagnostic tool.
- Turn the ignition to the ON position.
- Activate "Solenoid 1-2/3-4 (S1)."
The lamp should go on.

All OK?
YES
Continue with step 2.
NO
Rectify the relevant lead and continue with step 4, final check.






2 Check the wiring harness from the 16-pin Connector to the grommet into the gearbox.
- Turn the ignition key to the OFF position
Inspect for external damage to the wiring harness.

Is there any external damage?
YES
Rectify the damage and continue with step 4, final check.
NO
Continue with step 3.






3 Check the lead between the 16-pin connector and Solenoid S1.
- Plug in connector Hi 6-3 by the battery tray.
- Remove the cover on the valve housing
- Unplug the connector for solenoid 1-2/3-4 (S1).
- Connect a test lamp between the connector pin and a good grounding point.
- Connect a diagnostic tool.
- Turn the ignition to the ON position.
- Activate "Solenoid 1-2/3-4 (S1)."
The lamp should go on.

All OK?
YES
Change solenoid 1-2/3-4 (S1) and continue with step 4, final check.
NO
Rectify the relevant lead between the connector for solenoid 1-2/3-4 (S1) and pin 1 in the 16-pin connector, and continue with step 4, final check.






4 Final check
- Clear all diagnostic trouble codes in the system.
- Perform a driving cycle:
- Drive the car at varying loads and engine speeds for 5 minutes.
- Evaluate the driving cycle:
- Make sure the trouble code has not recurred.

Has the trouble code recurred?
YES
Continue with "Before changing a control module," see Fault diagnosis, general, "Before changing a control module." Tech 2 Scan Tool

NO
The steps taken to rectify the fault were correct.