P0705
Symptom: CHECK GEARBOX indicator lamp on.The system's emergency operation program has been activated.
Gear selector position sensor, inputs to transmission control module incorrect or absent. Shift-lock relay faulty.
Fault symptom
CHECK GEARBOX indicator lamp on.
The system's emergency operation program has been activated.
Condition
Non-permitted combination of gear selector position sensor contact functions or shift-lock relay faulty.
Diagnostic help
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Readings of the gear selector position sensor contacts can be obtained with the diagnostics instrument. Select "READ ON/OFF". Select "GEAR POS.SENSOR". The diagnostics instrument shows the ON or OFF status of all contacts.
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Readings of the gear selector position sensor functions can be obtained with the diagnostics instrument. The contacts are decoded and the current gear position is presented. Select "READ FUNCTIONS". Select "SELECTOR LEVER POS".
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Check the wiring
Intermittent faults may occur as a result of temporary short circuits and breaks in the wiring. Jiggle the leads at several places and in different directions to reveal any faults in the wiring harness, including connectors. Observe the multimeter, test lamp or ISAT scan tool while carrying out this check.
Diagnostic procedure
1 Check the gear selector position sensor's outputs
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Unplug connector H10-1 (10-pin connector located behind the battery).
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Connect an ohmmeter to the relevant pin as indicated in the table (H10-1, male connector) and pin 8. Check the resistance in respect of all selector lever positions (P, R, N, D, 3, 2, 1), see table.
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Resistance across connector pins
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1- 8
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2- 8
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3- 8
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4-8
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P
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<5 Ohm
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OL
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OL
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<5 Ohm
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R
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<5 Ohm
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<5 Ohm
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OL
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OL
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N
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OL
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<5 Ohm
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OL
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<5 Ohm
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D
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OL
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<5 Ohm
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<5 Ohm
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OL
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3
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<5 Ohm
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<5 Ohm
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<5 Ohm
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<5 Ohm
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2
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<5 Ohm
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OL
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<5 Ohm
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OL
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1
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OL
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OL
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<5 Ohm
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<5 Ohm
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Are correct resistance readings obtained?
Continue with point 3.
Continue with point 2.
2 Check the adjustment of the gear selector position sensor
Check the setting of the gear selector position sensor, see
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Is the gear selector position sensor correctly adjusted?
Check connector H10-1 for pin slide-out and corrosion. Check the leads connected to the transmission for shorting/continuity due to damaged insulation. If no cause of the fault can be found, change the gear selector position sensor. Proceed to step 6.
Adjust the gear selector position sensor, see
and proceed to step 6.
3 Check the wiring connected to the transmission control module
Check the wiring harness by obtaining diagnostics instrument readings of the input from the gear selector position sensor with the contact pins in connector H10-1 (female connector) open or connected to B+.
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Turn the ignition switch to the ON position.
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Select "SELECTOR POS. SENSOR"
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Read "CONTACT A", "CONTACT B", "CONTACT C" and "CONTACT PA" with the selector lever in position P.
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The diagnostics instrument should show OFF when the relevant contact pin is in the open position and ON when it is connected to B+.
Are the readings correct?
Continue with step 6.
Continue with point 4.
4 Checking the wiring harness
Unplug the shift-lock relay (in the main fuse box, dashboard) and check the continuity of the wiring between connector H10-1 and the transmission control module.
Is the wiring harness OK?
Plug in the shift-lock relay and continue with point 5.
Rectify the fault and continue with step 6.
5 Check the wiring harness (contd.)
Check the continuity of the wiring harness between connector H10-1 and the transmission control module.
Is the wiring harness OK?
Continue with step 6.
Change the relay and continue with point 6.
6 Final check
Clear the diagnostic trouble code, drive the car on test at varying engine loads and speeds for 5 minutes and check whether the diagnostic trouble code recurs.
Does the diagnostic trouble code recur?
Continue as described under .
The remedial action taken was correct.
