DTC 322

EBF. Code 3-2-2

3-2-2 Incorrect gear ratio
(Group II control modules only)*)

DTC information


Conditions for DTC






The control module calculates the ratio between the transmission input rpm and the car speed. There is a specific ratio for each gear. If the TCM registers a ratio deviation of more than 10%, the DTC 3-2-2 is set.



Substitution value

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


Defect cause

- Interference with or signal errors on the signal from the transmission rpm sensor
- Interference with or signal errors on the signal from the vehicle speed VS signal from the combined instrument
- Contact resistance in the Solenoid S1 or S2 circuit.
- Gear position sensor incorrectly adjusted
- Malfunction in gear position sensor
- Transmission oil level too low.
- Mechanical fault in the transmission. Worn components in the transmission causing slippage or reduced system pressure.


Fault symptom

- Poor performance due to the transmission operating only in 4th gear
- A noise or some obvious mechanical fault is the most common indication of a mechanical fault in the transmission.
- Fault-tracing starts with EBF1.


*) Description and Operation Electronic control system, Control Module".



EBF1

Checking transmission oil level






Check transmission oil level as per H2-H5. Check level at different temperatures.

If the level is OK:
- Checking for mechanical faults in the transmission EBF2.

If level is too low:
- Check for oil leaks. Correct faults if any. Top up with oil to correct level as per H4.

NOTE: Driving the car with low oil level may have damaged the transmission. Test drive car to ensure the transmission is OK.

Then continue with: Test driving EBF12.



EBF2

Checking for mechanical faults in the transmission.







- Ignition ON.
- Clear DTCs

Test drive the car as per Test Drive Form. Test Aide Drive Form Watch the automatic transmission warning light. If the light begins to blink: Note down immediately any unusual symptoms in the transmission operation or functions.

If the transmission does not show any mechanical fault or malfunction:
- Checking signal from transmission rpm sensor EBF3.

If the transmission has a mechanical malfunction and DTC 3-2-2 is not reset:
- See diagnostic code 1-1-1 for symptoms and procedures. DTC 111






If the transmission has a mechanical malfunction and DTC 3-2-2 is reset:
- Try a new transmission as per U1-U65.


Checking signal from transmission rpm sensor






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

- TCM connected

Use a multimeter to measure frequency between #1 (#A1) and #2 (#A2) on the test box.

- Raise car so that front wheels hang free
- Engine idling
- A/C turned off
- Set the gear selector to position D so the front wheels begin to rotate.
- Increase the engine rpm to approx. 2000 rpm
- Keep engine speed constant at 2000 rpm.






NOTE: When the rear wheels are stationary and the front wheels rotate a DTC can be stored in the ABS anti-lock braking system. Erase any DTCS set in the ABS system after fault-tracing.

The multimeter should give a stable reading (Hz) when the engine speed is constant and the transmission is not shifting.






NOTE: Ensure that the front wheels are not rotating when the gear shift lever is moved.

If the frequency is stable:
- Checking vehicle speed signal EBF6.

IF the frequency reading shows wide fluctuations:
- Checking transmission rpm sensor resistance EBF4.



EBF4

Checking transmission rpm sensor resistance






- Ignition OFF
- Disconnect TCM

Use an ohmmeter to measure between #1 (#A1) and #2 (#A2) on the test box.
The ohmmeter should read 300-600 Ohms.

If reading is OK:
- Check the transmission rpm sensor wiring is not located near sources of interference, such as electric motors, sparkplug leads, mobile telephone cables etc. Then continue with: Test driving EBF12.

If reading is incorrect:
- Checking the transmission connector EBF5.



EBF5

Checking the transmission connector






- Ignition OFF
- TCM disconnected.
- Disconnect the transmission connector.
- Check and correct the TCM connector for contact resistance and oxidation as per FA6 FA. Checking Wiring and Connections

- Connect transmission connector.

Use an ohmmeter to measure between #1 (#A1) and #2 (#A2) on the test box.
The ohmmeter should read 300-600 Ohms.

If reading is OK:
- The DTC was set because of poor contact in the transmission connector.

If reading is incorrect:
- Try a new transmission rpm sensor as per Y1-Y7.




EBF6

Checking vehicle speed signal






- Ignition ON.
- Raise car so that front wheels hang tree

Connect multimeter and measure frequency between #48 (#B18) and #20 (#A20) on the test box.

- Engine idling






- Move the gear selector to position D so the front wheels start to rotate
- Increase the engine rpm to 1800-2000 rpm
- Keep engine speed constant.

NOTE: When the rear wheels are stationary and the front wheels rotate a DTC can be stored in the ABS anti-lock braking system. Erase any DTCs set in the ABS system after fault-tracing.

The multimeter should give a stable reading (Hz) when the engine speed is constant.

NOTE: Ensure that the front wheels are not rotating when the gear shift lever is moved.

If the frequency is stable:
- Checking resistance in circuits to solenoid S1 and S2 EBF9.

If the frequency reading shows wide fluctuations:
- Checking the combined instrument vehicle speed sensor EBF7.



EBF7

Checking the combined instrument vehicle speed sensor VSS






- Ignition OFF
- Raise car so that front wheels hang free
- Remove the old VSS
- Install new VSS.

Connect multimeter and measure frequency between #48 (#B18) and #20 (#A20) on the test box.

- Engine idling
- Move the gear selector to position D so the front wheels start to rotate
- Increase the engine rpm to 1800-2000 rpm
- Keep engine speed constant.

NOTE: When the rear wheels are stationary and the front wheels rotate a DTC can be stored in the ABS anti-lock braking system. Erase any DTCs set in the ABS system after fault-tracing.







The multimeter should give a stable reading (Hz) when the engine speed is constant.

NOTE: Ensure that the front wheels are not rotating when the gear shift lever is moved.







If the frequency is stable:
- VSS defective.
Then continue with: Test driving EBF12.

If the frequency reading shows wide fluctuations:
- Replace the old VSS.
Then continue with: Checking interference on VSS signal EBF8.




EBF8

Checking interference on the vehicle speed sensor VSS signal







- Ignition OFF

Check the cables between the VSS and combined instrument are not located near sources of interference, such as electric motors, sparkplug leads, mobile telephone cables etc.

If the VSS wiring is located correctly and free from interference:
- Repeat test with new combined instrument.

If the VSS wiring is located near possible sources of interference:
- Correct fault.
Then continue with: Test driving EBF12.


EBF9

Checking resistance in solenoid S1 and S2 circuits






- Ignition OFF
- Disconnect TCM

Connect an ohmmeter between the test box terminals:

- #27 (#A27) and #20 (#A20), solenoid S1
- #28 (#A28) and #20 (#A20), solenoid S2

The ohmmeter should read 10-15 Ohms.

If the readings are OK:
- Checking the gear position sensor EBF1O.

If any reading is incorrect:
- Check the transmission connector for contact resistance and oxidation as per FA6. FA. Checking Wiring and Connections

Then continue with: Test driving EBF12.




EBF1O

Checking gear position sensor






- Ignition OFF
- Connect TCM
- Ignition ON.
- Set gearshift selector to position D

Use a voltmeter to measure between #5 (#A5) and #20 (#A20) on the test box.
The voltmeter should register 0-0.5 V.







Twist the gear position sensor lever/shaft up, down and to the sides.
The voltage reading on the voltmeter should be constant.

If reading is constant:
- Test driving EBF12.

If reading changes:
- Gear position sensor inspection/adjustment EBF11.


EBF11

Gear position sensor inspection/adjustment






- Ignition OFF

Check the gear position sensor adjustment as per M1- M6.

If adjustment OK:
- Try a new gear position sensor as per N1-N11.
Then continue with: Test driving EBF12.

If adjustment incorrect:
- Adjust the gear position sensor as per M1-M6.
Then continue with: Test driving EBF12.



EBF12

Test driving:






- Ignition ON.
- Clear any DTC's set.

Test drive as per Test Drive Form. Test Aide Drive Form Pay attention to the transmission warning light. If the light begins to blink: Note down immediately any unusual symptoms in the transmission operation or functions.






If the DTC is reset and/or the transmission indicates a mechanical malfunction or defective operation:
- Try a new transmission as per U1-U55.