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Home >> Volvo >> 1998 >> V70 AWD L5-2.4L Turbo VIN 56 B5254T >> 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






SPECIAL TOOLS
Volvo scan tool No. 988 8686, or equivalent.

SIGNAL TOO HIGH
1. Status message:

Note: To get the correct status message carry out the following before reading out the DTC.

- Preparation:
Ignition ON.
Set mode selector to E.
Wait approx. 30 seconds.
Set mode selector to S.
Wait approx. 30 seconds.
Read off the status of the DTC.

- Does the status indicate PERMANENT FAULT?
YES: proceed to step 2
NO: Proceed to step 17





2. Checking the driving mode selector connection:
- Preparation:
Ignition OFF
Remove the mode selector.
Check the selector is properly connected to the connector.

- Is the selector properly connected?
YES: Proceed to step 4
NO: Proceed to step 3





3. Checking component:
- Preparation:
Connect the driving mode selector.

- The DTC was set because the driving mode selector was not connected.
- Then continue with step 15





4. Checking ground wiring
- Preparation:
Ignition OFF
Turn of all equipment in the car that takes power from the battery, e.g. interior lighting and radio
Disconnect the driving mode selector

- Connect ohmmeter between the connector terminal 5 on the selector and ground.
- The ohmmeter should indicate approx. 0 Ohms.
- If reading is OK:
Proceed to step 6
- If reading is incorrect:
Proceed to step 5





5. Checking for open-circuit, contact resistance and oxidation
- Preparation:
Ignition OFF
- Check ground point 31/15 and the cable between the program selector connector terminal 5 and ground point 31/15 for
Open-circuit according to step 2 of checking for permanent faults. Checking For Permanent Faults
Oxidation and resistance in contacts according to step 5 of checking for permanent faults. Checking For Permanent Faults
- Then continue with step 15





6. Checking short-circuit to supply on the signal wiring
- Preparation:
Ignition OFF
Driving mode selector disconnected.
Ignition on.
- Connect an test light with minimum 3 watt bulb between the mode selector connector terminal:
5 and 3 (MS1)
5 and 2 (MS2)
- Did the bulb light?
YES: proceed to step 7
NO: Proceed to step 8





7. Checking for open-circuit, contact resistance and oxidation
- Preparation:
Ignition ON
- Check the cables between the driving mode selector connector terminal 3 and the transmission control module (TCM) #B17 and terminal and control module #B16 for short-circuit to supply according to step 4 of checking for permanent faults. Checking For Permanent Faults
- Then continue with step 14





8. Checking signal cables
- Preparation:
Ignition OFF
Driving mode selector disconnected
Ignition ON
- Connect an voltmeter between the driving mode selector's connector terminal:
5 and 3 (MS1)
5 and 2 (MS2)
- The voltmeter should register approx. 0-2 V below battery voltage.
- If reading is OK:
Proceed to step 11
- If reading is incorrect:
Proceed to step 9





9. Checking the transmission control module (TCM) connector
- Preparation:
Ignition OFF
Correct problems with contact resistance and oxidation in the TCM connector and connectors 24/2E and 24/7 according to step 5 of checking for permanent faults. Checking For Permanent Faults
Transmission control module connected
Driving mode selector disconnected.
Ignition ON.
- Connect an voltmeter between the driving mode selector's connector terminal:
5 and 3 (MST)
5 and 2 (MS2)
- The voltmeter should register approx. 0-2 V below battery voltage.
- If reading is OK:
Proceed to step 12
- If reading is incorrect:
Proceed to step 10





10. Checking for open-circuit
- Preparation:
Ignition ON.
- Check the cables between the mode selector terminal 2 and the control module #B16 and terminal 3 and control module #B17 for open-circuit according to step 2 of checking for permanent faults. Checking For Permanent Faults
- Then continue with step 15





11. Checking the driving mode selector's resistance
- Preparation:
Ignition OFF
Driving mode selector disconnected.
- Connect an ohmmeter between the driving mode selector's connector terminal:
3 and 5 with the mode selector in position S
2 and 5 with the mode selector in position
- The ohmmeter should indicate approx. 0 Ohms.
- If reading is OK:
Proceed to step 12
- If reading is incorrect:
Proceed to step 13





12. Checking for oxidation and resistance in contacts
- Preparation:
Ignition OFF
Driving mode selector disconnected.
- The DTC was set because of poor contact in the mode selector's connector.
- Correct problem:
Loose contacts in the mode selector according to step 5 of checking for intermittent faults. Checking For Intermittent Faults
Oxidation and resistance in contacts according to step 5 of checking for permanent faults. Checking For Permanent Faults
- Then continue with step 15





13. Replacing component
- Preparation:
Ignition OFF
Driving mode selector disconnected.
- Try a new mode selector
- Then continue with step 15





14. Checking the driving mode selector's operation

NOTE: The driving mode selector can become defective due to a short-circuit to supply in the signal wiring.

- Check the mode selector as follows:
Ignition OFF
Driving mode selector disconnected
- Connect an ohmmeter between the driving mode selector's connector terminals:
3 and 5 with the mode selector in position S
2 and 5 with the mode selector in position E
- The ohmmeter should indicate approx. 0 Ohms
- If reading is OK:
Fault corrected
- If reading is incorrect:
Proceed to step 13





15. Verification
- After repairs have been completed they must be verified as follows to ensure the fault has been eliminated:
Ignition OFF
Reconnect the connectors, reinstall components etc.
Ignition ON
Select scrolling values.
Read off the driving mode selector's position
- Check positions E, S and W.
- Are all positions OK?
YES: Fault corrected
NO: Proceed to step 16
16. 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 step 1





17. Intermittent fault
- Check the control module and mode selector connectors for:
loose contacts according to step 5 of checking for intermittent faults. Checking For Intermittent Faults
resistance in contacts according to step 6 of checking for intermittent faults. Checking For Intermittent Faults
- Check the cable between the mode selector connector terminal 3 and TCM #B17 for:
An intermittent open-circuit according to step 2 of checking for intermittent faults. Checking For Intermittent Faults
An intermittent short-circuit to supply according to step 4 of checking for intermittent faults. Checking For Intermittent Faults
- Check the cable between the mode selector connector terminal 2 and TCM #B16 for:
An intermittent open-circuit according to step 2 of checking for intermittent faults. Checking For Intermittent Faults
An intermittent short-circuit to supply according to step 4 of checking for intermittent faults. Checking For Intermittent Faults
- Check the cable between the mode selector connector terminal 5 and ground point 31/15 for:
An intermittent open circuit according to step 2 of checking for intermittent faults. Checking For Intermittent Faults
- Then continue with step 18
18. 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 step 1
NO: Operation done
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