U0101

2GR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: U0101: Lost Communication with TCM
U0101 - Lost Communication with TCM

DESCRIPTION

The TCM (transmission control module) is located inside the ECM. The ECM intercommunicates with the TCM through the CAN (controller area network).

If there is a problem in this intercommunication, the ECM sets the DTC.





MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





CONFIRMATION DRIVING PATTERN





* Connect the Techstream to the DLC3.

* Turn the engine switch on (IG) and turn the Techstream on.

* Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure) DTC Check / Clear.

* Turn the engine switch off and wait for 30 seconds.

* Turn the engine switch on (IG) and turn the Techstream on [A].

* Wait 5 seconds or more.

* Enter the following menus: Powertrain / Engine / Trouble Codes.

* Read the DTC [B].

HINT
* If a DTC is output, the system is malfunctioning.
* If a DTC is not output, perform the following procedure.
* Enter the following menus: Powertrain / Engine / Utility / All Readiness.

* Input the DTC: U0101.

* Check the DTC judgment result [B].





HINT
* If the judgment result shows ABNORMAL, the system has a malfunction.
* If the judgment result shows NORMAL, the system is normal.
* If the judgment result shows INCOMPLETE or UNKNOWN, perform step [A] again.
* Enter the following menus: Powertrain / Engine / Utility / All Readiness.

* Check the DTC judgment result.

HINT
* If the judgment result shows ABNORMAL, the system has a malfunction.
* If the judgment result shows NORMAL, the system is normal.
* If the test result is INCOMPLETE or UNKNOWN and no DTC is output, perform a universal trip and check for permanent DTCs DTC Check / Clear.

HINT
* If a permanent DTC is output, the system is malfunctioning.
* If no permanent DTC is output, the system is normal.
INSPECTION PROCEDURE

PROCEDURE

1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC U0101)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Select the following menu items: Powertrain / Engine / Trouble Codes.

(e) Read DTCs.

Result:





B -- GO TO DTC CHART SFI System

A -- REPLACE ECM Removal