DTC 313

EBE. Code 3-1-3

3-1-3 Gear position sensor signal incorrect

DTC information

Conditions for DTC







The gear position sensor signals provide the TCM with data on which position the gear selector is in. This information is transmitted by grounding signals A, B, C and PA in various combinations. The grounding occurs inside the gear position sensor. If the TCM registers a combination of A, B, C and PA grounded signals which is not permitted, DTC 3-1-3 is set.



Substitution value

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


Defect cause

- Short circuit to supply or ground in the signal wiring.
- Break in signal wiring
- Gear position sensor incorrectly adjusted
- Malfunction in gear position sensor
- Contact resistance in connections.


Fault symptom

- Poor performance due to the transmission operating in 4th gear.

NOTE: The gear position sensor will not stand short-circuiting to battery voltage.

- Fault-tracing starts with EBE1.



EBE1

Checking gear position sensor






- Ignition ON.

Check that all positions of the gear position sensor are operative by using Diagnostic Test Mode 2. Diagnostic Test Mode 2 Move the gear selector to all shift positions a number of times, and repeatedly select the same position to ensure the gear position sensor is correctly adjusted and operating properly.

Only certain markets:
NOTE: In order to move from position P to R, the "SHIFT-LOCK OVERRIDE" function must be used otherwise the code for the stop (brake) light switch will give an incorrect value.






If all positions are OK:
- Intermittent fault. Fault-tracing as per EBE9

If not all the positions are operative:
- Checking gear position sensor adjustment and grounding point EBE2.




EBE2

Checking the gear position sensor adjustment and grounding point







- Ignition OFF
- Remove the air cleaner (ACL) housing to access the transmission connector

The grounding point for the gear position sensor housing is via the two retaining screws and the mating surface at the transmission. Check the gear position sensor is properly grounded to the transmission housing.

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

Correct faults if any.
Then continue with: Checking battery voltage EBE3.



EBE3

Checking battery voltage






Check the battery voltage over the positive and negative terminals.
Make a note of the reading.
Then continue with: Checking signal from gear position sensor EBE4.



EBE4

Checking signal from gear position sensor






- Ignition OFF
- Connect test box and check ground points as perGB1-GB2. GB. Connecting the Test Box

- Connect TCM
- Ignition ON.

Use a voltmeter to measure between #20 (#B20) and the terminal as in the table.












- Check and note the reading for the respective terminal.

If the readings are OK:
- The DTC was set because of poor contact in the TCM connector. Check and correct the transmission and TCM connectors for contact resistance and oxidation as per FA6 FA. Checking Wiring and Connections

If the voltmeter reads a steady approx. 0 V for some/all of the terminals, regardless of the selector position:
- Check signal wiring resistance to ground EBE7.

If the voltmeter reads a steady approx. battery voltage for some/all of the terminals, regardless of the selector position:
- Check the cable for the terminal with the incorrect reading between the gear position sensor and TCM for short circuit to supply as per FA4.
FA. Checking Wiring and Connections

Then continue with: Checking operation of the gear position sensor EBE8.

If the voltmeter reads a steady approx. 1 V below battery voltage for some/all of the terminals, regardless of the selector position:
- Checking the transmission connector EBE5.




EBE5

Checking the transmission connector






- Ignition OFF

Check and correct the transmission connector for contact resistance and oxidation as per FA6 FA. Checking Wiring and Connections

- Connect transmission connector.
- Ignition ON.

Use a voltmeter to measure between the test box #20 (#A20) and the terminal as in the table.

- Check and note down the reading for terminal(s) with incorrect readings.






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

If reading is incorrect:
- Checking signal wiring EBE6.




EBE6

Checking signal wiring






- Ignition OFF
- Disconnect the transmission connector.

Connect an ohmmeter between the transmission connector terminal (TCM side) for the terminal with the incorrect reading:

- terminal 1 and test box #3 (#A3) "A"
- terminal 2 and test box #4 (#A4) "B"
- terminal 3 and test box #5 (#A5) "C"
- terminal 4 and test box #6 (#A6) "PA"

The ohmmeter should read approx. 0 Ohm for all readings.

If the readings are OK:
- Try a new gear position sensor as per N1-N11.

If one or several readings are incorrect:
- Check the cable with the incorrect reading between the transmission connector and the TCM for breaks in the circuit as per FA2. FA. Checking Wiring and Connections



EBE7

Checking signal wiring resistance to ground






- Ignition OFF
- Disconnect transmission connector
- Disconnect TCM

Connect an ohmmeter between test box #20 (#A20) and terminal:

- #3 (#A3) "A"
- #4 (#A4) "B"
- #5 (#A5) "C"
- #6 (#A6) "PA"

The ohmmeter should read infinite resistance.

If reading is OK:
- Try a new gear position sensor as per N1-N11.

If reading is incorrect:
- Check the cable with the incorrect reading between the transmission connector and the TCM or short circuit to ground as per FA3. FA. Checking Wiring and Connections



EBE8

Checking operation of the gear position sensor






The gear position sensor can malfunction due to a short circuit to supply in the signal wiring. Check the gear position sensor as follows:

- Ignition OFF
- TCM connected
- Connect transmission connector.
- Ignition ON.

Use a voltmeter to measure between the test box #20 (#A20) and the terminal as in the table.

- Check and note the reading for the respective terminal.






If the readings are OK:
- The gear position sensor is OK.

If readings are incorrect:
- Try a new gear position sensor as per N1-N11.



EBE9

Intermittent fault

Checking wiring and connections






- Check that the gear position sensor is securely attached.

- Check the connectors for the transmission and the transmission control module (TCM) as well as the gear position sensor ground point for loose connections as per FA5, and contact resistance and oxidation as per FA6. FA. Checking Wiring and Connections

- Check the cables between the gear position sensor and the TCM for intermittent breaks as per FA2, intermittent short circuit to supply as per FA4, intermittent short circuit to ground as per FA3. FA. Checking Wiring and Connections