DTC 211

EAQ. Code 2-1-1

2-1-1 Fault in Transmission Control Module (TCM)

DTC information


Conditions for DTC






Solenoid S2 is controlled by an integral amplifier (driver stage) on the output of the transmission control module (TCM). The TCM opens the driver stage when the solenoid is to be activated and the solenoid then receives supply voltage. If the TCM registers a short circuit in the driver stage in the driver stage output to solenoid S1 when the solenoid should not be activated, the road speed is above 25 km/h (15 mph) and the gear shift selector is in position D or L, the DTC 2-1-1 is set. Solenoid S1 cannot then be activated.






Substitution value

The TCM "Limp-home" program has been initiated and the transmission operates only in 4th gear.

Defect cause

- Incorrect supply voltage to the system
- Contact resistance in connections.
- Fault in transmission control module TCM

Fault symptom

- Poor performance due to the transmission starting in 4th gear.
- Fault-tracing starts with EAQ1.


EAQ1

Checking voltage drop over signal ground and power ground






- Ignition OFF
- Connect test box and check ground points as per GB1-GB2. GB. Connecting the Test Box

- Connect TCM
- Ignition ON.
- Turn on as many power consuming items as possible.

Use a voltmeter to measure between #20 (#A20) and #29 (#A29) on the test box.
The voltmeter should read less than 0.6V.






If reading is OK
- Checking voltage drop over signal ground EAQ2.

If reading is incorrect:
- Check ground points 31/32 and 31/33, the cables between the ground points and the TCM #A20 and #A29, and the TCM connector for a break in the circuit as per FA2 and contact resistance and oxidation as per FA6. FA. Checking Wiring and Connections

Then continue with: Checking voltage drop over signal ground EAQ2.



EAQ2

Checking voltage drop over signal ground






- Ignition OFF
- Test box connected
- Connect a test box to the engine control module ECM (MFI Fenix 5.2, LH3.2, or Motronic 4.3).
- Control modules connected
- Ignition ON.
- Turn on as many power consuming items as possible.

Use a voltmeter to measure between TCM #20 (#A20) and the ECM test box:

- Fenix 5.2 MFI control module: #42 (#A42), signal ground, control module
- LH 3.2 MFI control module: #20 (#A20), signal ground, control module
- Motronic 4.3 MFI control module: #42 (#A42), signal ground, control module

The voltmeter should read less than 0.10 V.






If reading is OK:
- Checking supply voltage (15 supply) EAQ3.

If reading is incorrect:
- Check ground point 31/33, wiring between the ground point and the TCM and ECM modules for contact resistance and oxidation as per FA6. FA. Checking Wiring and Connections

Then continue with: Checking supply voltage (15 supply) EAQ3.



EAQ3

Checking supply voltage (15 supply)






- Ignition ON.

Use a voltmeter to measure between #30 (#A30) and #29 (A#29) on the test box.
The voltmeter should register approx. battery voltage.

If reading is OK:
- Checking supply voltage (30 supply) EAQ4.

If reading is incorrect:
- Check the cable between fuse 11/1 and the TCM #A30 for breaks as per FA2. FA. Checking Wiring and Connections

Then continue with: Checking supply voltage (30 supply) EAQ4



EAQ4

Checking supply voltage (30 supply)






- Ignition ON.

Use a voltmeter to measure between #10 (#A1O) and #20 (#A20) on the test box.
The voltmeter should register approx. battery voltage.

If reading is OK:
- Checking the transmission control module TCM EAQ5.

If reading is incorrect:
- Check the cable between the positive terminal on the battery and TCM #A1O for breaks as per FA2. FA. Checking Wiring and Connections

Then continue with: Checking the transmission control module TCM EAQ5.



EAQ5

Checking the transmission control module TCM






- Ignition OFF
- Disconnect test box
- Connect TCM
- Ignition ON.
- Clear DTCs
- Test drive the car at speed higher than 25 km/h (15 mph).






If the DTC is set again:
- Try a new TCM as per AB1-AB4.