DTC 114

DD. DTC 1-1-4
1-1-4 Open-circuit in driving mode selector circuit

Principle of operation

The driving mode selector enables the driver to select the desired driving mode. Two signal leads, MS1 and MS2, and a ground lead are connected to the three buttons. The W, E and S modes are selected by grounding either the first, the second or both signal leads, whereupon the TCM adopts the appropriate gear selection program. Note that MS1 and MS2 are grounded simultaneously only while the W button is depressed.

Fault description

MS1 and MS2, which may be high or low, are the signals which determine the driving mode used by the system. In the case of this fault, MS1 and MS2 remain constantly high and the system runs continuously in Mode E (Economy).

The fault must be present for at least 30 seconds for a DTC to be recorded. In other words, the DTC will be recorded if a loose connection persists for this duration. Troubleshooting should indicate if the open-circuit is in the lead to MS1 or MS2, or in ground lead 31/14. The fault may also be in the driving mode selector or TCM.





Circuit description

The circuit consists of the TCM, three connectors and the driving mode selector.





1
Testing driving mode selector in test mode 2

Test driving mode selector in all positions in test mode 2. Displaying & Reading Trouble Codes

If response codes 3-2-4, 2-4-4 and 3-1-4 are correct, fault is occurring only intermittently under particular conditions, making it considerably more difficult to locate.





2
Measuring driving mode selector voltage

- Switch off ignition.
- Connect break-out box between TCM and wiring.
- Switch on ignition.





Measure voltages as per table.

Note!
In measurements including W mode, W button must be kept depressed throughout measurement. DTC 1-1-4 will be recorded if button is held depressed for longer than 30 seconds.

- If readings are as specified in table and LEDs on selector light when appropriate button is pressed, driving mode selector and wiring are OK.
In that case, DTC is due to intermittent fault. Return to Testing and Inspection. Diagnostic Procedures

- If any reading is incorrect, ground terminal, wiring and connections to driving mode selector must be checked.
Check wiring for open-circuit and short-circuits to ground, and for poor connections as described in Testing and Inspection. Component Tests and General Diagnostics

Proceed to following point.

3
Conclusions

- If LEDs do not light, connection of driving mode selector is probably poor. Check connectors and ground lead as described in Testing and Inspection. Component Tests and General Diagnostics

- If fault persists although LEDs light, leads MS1 and MS2 are probably open-circuited. Component Tests and General Diagnostics

- If only one LED lights, driving mode selector is faulty. Replace driving mode selector.

- If control system not does change modes although above readings are correct but test mode 2 results are incorrect, fault is in TCM. Try with new TCM.

Return to Testing and Inspection. Diagnostic Procedures