DTC U0293-449: Lost Communication with Hybrid Powertrain Control Module [08/2014 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: System Select / Health Check.
4. Check if DTCs are output.

   Result

   Result	Proceed to
   Only U0293-449 is output.	A
   Only U0293-439 and U0293-449 are also output.	B
   U0293-449 and any CAN communication system DTC other than U0293-439 are output.	C

5. Turn the power switch off.

B → See step   7 

C → See step   8 

A: Go to next step 

NG → See step   5 

OK: Go to next step 

1. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   L135-10 (PIBM) - Body ground	Power switch off	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Power Management Control ECU)

NG → See step   6 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   9 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   10 

1. Disconnect connector L135 from the power management control ECU.
2. Remove the PIMR relay from the relay block assembly.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *1	Relay Block Assembly (PIMR Relay)	-	-
   *a	Rear view of wire harness connector (to Power Management Control ECU)	-	-

   Standard Resistance (Check for Open)

   Tester Connection	Switch Condition	Specified Condition
   L135-10 (PIBM) - 5 (L)	Power switch off	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Switch Condition	Specified Condition
   L135-10 (PIBM) or 5 (L) - Body ground and other terminals	Power switch off	10 kΩ or higher

4. Install the PIMR relay.
5. Connect the power management control ECU connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   9