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Home >> Volvo >> 1998 >> S90 L6-2.9L VIN 96 B6304S >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> Manufacturer Code Charts >> AT / DTC Codes (Transmission Control Module) >> AT-114 Mode Selector Switch >> Signal Too High

Signal Too High





Status Message

NOTE: To get the correct status message carry out the following before reading the diagnostic trouble code (DTC):

- Ignition ON.
- Set mode selector to E.
- Wait for about 30 seconds.
- Set mode selector to S.
- Wait for about 30 seconds.
- Read off the status of the diagnostic trouble code.
- Does the status indicate PERMANENT FAULT?

Yes:
- Proceed to: Checking The Mode Selector Connection section below.

No:
- Proceed to: Intermittent Fault section below.





Checking The Mode Selector Connection
- Ignition OFF.
- Remove mode selector from panel.
- Check that mode selector is correctly connected.
- Is the mode selector correctly connected?

Yes:
- Proceed to: Checking Ground Lead section below.

No:
- Proceed to: Checking Component section below.

Checking Component
- Connect mode selector.
- The diagnostic trouble code was caused by the mode selector not being correctly connected.
- Proceed to Verification section below.





Checking Ground Lead
- Ignition OFF.
- Turn of all equipment in the car that takes power from the battery such as interior lighting and radio.
- Disconnect the mode selector.
- Connect an ohmmeter between mode selector connector terminal 3 and ground.
- The ohmmeter should read approx. 0 Ohms.

If reading is OK:
- Proceed to: Checking Short-circuit To Supply In Signal Wiring section below.

If reading is incorrect:
- Proceed to: Checking For Open-circuit, Contact Resistance And Oxidation section below.





Checking For Open-circuit, Contact Resistance And Oxidation
- Check ground terminal 31/67 and the cable between the mode selector connector terminal 3 and ground terminal 31/67 for an open-circuit, contact resistance and oxidation.
- Proceed to Verification section below.





Checking Short-circuit To Supply In Signal Wiring
- Ignition OFF.
- Mode selector disconnected.
- Ignition ON.
- Connect an electrician's screw driver (minimum 3 W bulb) between the mode selector connector terminal:

- 3 and 2 (MS1)
- 3 and 1 (MS2)

- Does the bulb light?

Yes:
- Proceed to: Checking For A Short-circuit section below.

No:
- Proceed to: Checking Signal Cables section below.





Checking For A Short-circuit
- Check cables between mode selector connector terminal and transmission control module (TCM) # 33 and terminal 2 and transmission control module # 6 for a short-circuit to supply voltage.
- Proceed to: Checking Mode Selector Function section below.





Checking Signal Cables
- Ignition OFF.
- Connect transmission control module.
- Mode selector disconnected.
- Ignition ON.
- Connect an voltmeter between mode selector connector terminal:

- 3 and 2 (MS1)
- 3 and 1 (MS2)

- The voltmeter should read 0 - 2 Volts below battery voltage.

If reading is OK:
- Proceed to Checking Mode Selector Resistance section below.

If reading is incorrect:
- Proceed to Checking Transmission Control Module Connector section below.





Checking Transmission Control Module Connector
- Ignition OFF.
- Check transmission control module and mode selector connectors for contact resistance and remedy.
- Transmission control module connected.
- Mode selector disconnected.
- Ignition ON.
- Connect an voltmeter between mode selector connector terminal:

- 3 and 2 (MS1)
- 3 and 1 (MS2)

- The voltmeter should read 0 - 2 Volts below battery voltage.

If reading is OK:
- Proceed to Fault-tracing Information section below.

If reading is incorrect:
- Proceed to Checking For An Open-circuit section below.

Fault-tracing Information
- The diagnostic trouble code was caused by loose connections in the connectors.
- Proceed to Verification section below.





Checking For An Open-circuit
- Check cables between mode selector terminal 2 and transmission control module # 6 and terminal 1 and transmission control module # 33 for an open-circuit.
- Proceed to Verification section below.





Checking Mode Selector Resistance
- Ignition OFF.
- Mode selector disconnected.
- Connect an ohmmeter between mode selector connector terminal:

- 2 and 3 with the mode selector in position S
- 1 and 3 with the mode selector in position E

- The ohmmeter should read approx. 0 Ohms.

If reading is OK:
- Proceed to Checking For Contact Resistance And Oxidation section below.

If reading is incorrect:
- Proceed to Replacing Component section below.





Checking For Contact Resistance And Oxidation
- The diagnostic trouble code was caused by loose connections in the mode selector connector. Check mode selector connector for loose connections, contact resistance and oxidation.
- Proceed to Verification section below.

Replacing Component
- Try a new mode selector.
- Proceed to Verification section below.





Checking Mode Selector Function
- The mode selector can malfunction if there is a short-circuit to supply voltage in its signal cable. Check the mode selector as follows:

- Ignition OFF.
- Mode selector disconnected.
- Connect an ohmmeter between mode selector connector terminal:

- 2 and 3 with the mode selector in position S
- 1 and 3 with the mode selector in position E

- The ohmmeter should read approx. 0 Ohms.

If reading is OK:
- Fault corrected.

If reading is incorrect:
- Proceed to Replacing Component section below.
- Proceed to Verification section below.





Verification
- After repairs have been completed they must be verified as follows to ensure that the fault has been eliminated:

- Ignition OFF.
- Reconnect connectors, reinstall components etc.
- Ignition ON.
- Go into scrolling values.
- Read off the mode selector position. Check positions E, S and W.
- Are all positions OK?

Yes:
- Fault corrected.

No:
- Proceed to Fault-tracing Information section below.

Fault-tracing Information
The verification result shows that the fault persists.

- Do you want to exit fault-tracing?

Yes:
- Fault not corrected.

No:
- Proceed to Status Message section above.





Intermittent Fault
- Check the control module and mode selector connectors for loose contacts, contact resistance and oxidation.
- Check cable between mode selector connector terminal 1 and transmission control module # 33 for an intermittent open-circuit and an intermittent short-circuit to supply voltage.
- Check cable between mode selector connector terminal 2 and transmission control module # 6 for an intermittent open-circuit and an intermittent short-circuit to supply voltage.
- Check cable between mode selector connector terminal 3 and ground terminal 31/67 for an intermittent open-circuit.
- Proceed to Fault-tracing Information section below.

Fault-tracing Information
For intermittent faults fault-tracing is not followed by a verification because the fault is not present at this moment.

- Do you want to repeat fault-tracing?

Yes:
- Proceed to Status Message section above.

No:
- Operation done.
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