DTC 211

EA. DTC 2-1-1
2-1-1 TCM fault

Principle of operation

Solenoid S1 performs gearshifting in combination with solenoid S2. The solenoid operates when supplied with battery voltage from the TCM, which delivers an upshifting or downshifting signal depending on the speed of the car, the throttle position and the selected driving mode.

Fault description

A short-circuit has occurred at some point in the solenoid S1 circuit. As a result, the TCM has interrupted the solenoid supply and gearshifting cannot be performed. The emergency limp-home program is activated and the transmission operates only in 4th gear. The MIL on the panel lights.

Note!
The speed must exceed 25 km/h (16 mph) when test driving to enable the fault to be detected





Circuit description

The circuit consists of the TCM, three connectors and solenoid S1 in the transmission.




1
Checking TCM supply voltage


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

Measuring voltage between ignition switch and power ground

Measure voltage across # 14 (+12 V) and # 11 (PG).

- Instrument should indicate battery voltage.

Measuring voltage battery and signal ground

Measure voltage across # 30 (+12 V) and # 12 (SG).

- Instrument should indicate battery voltage.

If either reading is incorrect, check leads in question as described in Testing and Inspection. Component Tests and General Diagnostics

Proceed to following step.

2
Checking signal ground (SG) and power ground (PG)

- Switch on ignition.

Connect voltmeter across # 11 (PG) and # 12 (SG).

- Instrument should indicate less than 0.7 volt, otherwise ground connections are poor. In this case, check leads and connections to ground terminals as described in Testing and Inspection. Component Tests and General Diagnostics

It readings are correct, return to Testing and Inspection. Diagnostic Procedures

Test drive car at speed above 25 km/h (16 mph). If DTC recurs, try with new TCM.