P1858
Gear-shifting solenoid valve, SOLENOID 2-3 (S2), open circuit/shorted to B+.
Fault symptom
CHECK GEARBOX indicator lamp on. The system's emergency operation program has been activated. Gear-shifting is not possible with solenoid S2 and the transmission operates only in 4th gear.
Condition
Short circuit to battery positive (B+) or open circuit when the solenoid is not activated. The solenoid is not activated if the car is driven in 3rd or 4th gear with the selector lever in position D or 3.
Diagnostic help
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Solenoid S2 can be activated with the diagnostics instrument as follows: Select "ACTIVATE". Select "SOLENOID 2-3". The solenoid is activated for 30 seconds at a frequency of 1 Hz. Listen for a clicking sound.
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Solenoid S2 can be activated without the diagnostics instrument as follows: Turn the ignition switch to ON. Move the selector lever to position D. When WINTER is selected, the solenoid operates and when WINTER is cancelled the solenoid releases. Listen for a clicking sound.
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Diagnostic procedure
1 Check the resistance of the solenoid valve
Unplug connector H16-3 (16-pin connector located behind the battery). Take a resistance reading across pin 9 of the male connector and a good grounding point on the transmission. The reading obtained should be 10-20 ohms.
Is the resistance correct?
Continue with point 3.
Continue with point 2.
2 Check the resistance of the solenoid valve (contd.)
Remove the valve housing cover and the solenoid lead. Check the resistance of the lead between pin 9 of male connector H16-3 and the solenoid. The resistance should be less than 0.5 ohms.
Is the resistance correct?
Carry out a visual check of the solenoid's electrical connection for moisture and corrosion. If any probable cause of the fault can be seen it should be rectified, otherwise the solenoid should be changed. Then proceed to point 5.
Repair or replace the wiring (including connectors) between connector H16-3 and the solenoid. Then proceed to point 5.
3 Check the wiring connected to the transmission control module
Check the continuity of the lead between pin 9 of connector H16-3 and pin 3 of the transmission control module's connector. Remember to check for slide-out of connector pins and sockets.
Is the wiring OK?
Continue with point 4.
Rectify the fault and continue with step 5.
4 Check the control module's output
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Plug in the transmission control module.
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Connect a test lamp to pin 9 of female connector H16-3 and battery negative (B-).
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Connect the Scan tool diagnostics instrument.
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Turn the ignition switch to the ON position.
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Select "SOLENOID 2-3". The test lamp should flash for 30 seconds.
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Test lamp flashing?
Check the solenoid and its electrical connection for moisture and corrosion. If there is no probable cause of the fault, the solenoid should be changed. Then continue with point 5.
Continue with point 5.
5 Final check
Clear the diagnostic trouble code, drive the car on test at varying engine loads and speeds for 5 minutes and obtain readouts of any diagnostic trouble codes that are generated.
Does the diagnostic trouble code recur?
Continue with
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The remedial action taken was correct.
