DTC P0343-747: Camshaft Position Sensor "A" Circuit High Input: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes.
4. Check if DTCs are output.

   Result

   Result	Proceed to
   None of the following DTCs are not output.	A
   Any of the following DTCs are output.	B

   DTC No.	Relevant Diagnosis
   P0340	Camshaft Position Sensor Circuit Malfunction
   P0342	Camshaft Position Sensor "A" Circuit Low Input (Bank 1 or Single Sensor)
   P0343	Camshaft Position Sensor "A" Circuit High Input (Bank 1 or Single Sensor)

B → See step   11 

A: Go to next step 

1. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
2. Check if DTCs are output.

   Result

   Result	Proceed to
   None of the following DTCs are not output.	A
   Any of the following DTCs are output.	B

   DTC No.	Relevant Diagnosis
   P0868-866, 894	Transmission Fluid Pressure Low
   P0A1B (all INF codes) *1	Drive Motor "A" Control Module

   HINT: 

   • *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic flowchart.
   • P0343-747 may be set due to a malfunction which also causes DTCs in the preceding table to be set. In this case, first troubleshoot the output DTCs in the preceding table. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.

B → See step   15 

A: Go to next step 

1. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
2. Check if DTCs are output.

   Result

   Result	Proceed to
   P0343-886 is not output.	A
   P0343-886 is output.	B

B → See step   6 

A: Go to next step 

1. Check the connection of the low voltage connector of the inverter with converter assembly.

   OK

   The connector is connected securely and there are no contact problems.

   HINT: 

   When connecting the connector, insert it with the locking lever in the raised position. Rotate the lever downward and make sure that the connector is pulled into its socket. When the locking lever is in its fully closed position, a click will be heard as its locking claws engage. After the click is heard, pull up on the connector to confirm that it is properly connected.

NG → CONNECT SECURELY 

OK: Go to next step 

1. Turn the power switch off.
   Fig 1: Identifying A14 And A77 Terminal Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Remove the service plug grip. Refer to PRECAUTION .
   NOTE:

   After removing the service plug grip, do not turn the power switch on (READY) unless instructed by the repair information because this may cause a malfunction.

3. Disconnect the low voltage connector from the inverter with converter assembly.
4. Disconnect connector A14 from the ECM.
5. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for open)

   Tester Connection	Switch Condition	Specified Condition
   A14-19 (GO1) - A77-16 (GI)	Power switch off	Below 1 Ω

   Standard resistance (Check for short)

   Tester Connection	Switch Condition	Specified Condition
   A14-19 (GO1) or A77-16 (GI) - Body ground and other terminals	Power switch off	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   12 

1. Check the connections of the ECM connectors.

   OK

   The connectors are connected securely and there are no contact problems.

NG → CONNECT SECURELY 

OK: Go to next step 

1. Disconnect connector A75 from the hybrid vehicle control ECU.
   Fig 2: Checking Harness And Connector (Hybrid Vehicle Control ECU -- ECM)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect connector A14 from the ECM.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for open)

   Tester Connection	Switch Condition	Specified Condition
   A75-14 (GI) - A14-19 (GO1)	Power switch off	Below 1 Ω

   Standard resistance (Check for short)

   Tester Connection	Switch Condition	Specified Condition
   A75-14 (GI) or A14-19 (GO1) - Body ground and other terminals	Power switch off	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Turn the power switch off.
2. Remove the service plug grip. Refer to PRECAUTION .
   NOTE:

   After removing the service plug grip, do not turn the power switch on (READY) unless instructed by the repair information because this may cause a malfunction.

3. Measure the resistance according to the value(s) in the table below.
   Fig 3: Identifying A14 And A77 Terminal Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance (Check for open)

   Tester Connection	Switch Condition	Specified Condition
   A14-19 (GO1) - A77-16 (GI)	Power switch off	Below 1 Ω

   Standard resistance (Check for short)

   Tester Connection	Switch Condition	Specified Condition
   A14-19 (GO1) or A77-16 (GI) - Body ground and other terminals	Power switch off	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Check that the service plug grip is not installed.
2. Measure the resistance according to the value(s) in the table below.
   Fig 4: Identifying A77 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance

   Tester Connection	Switch Condition	Specified Condition
   A77-16 (GI) - A77-30 (GND1)	Power switch off	10 kΩ or higher

NG → See step   12 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 5: Identifying A75 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance

   Tester Connection	Switch Condition	Specified Condition
   A75-14 (GI) - A75-7 (E1)	Power switch off	10 kΩ or higher

NG → See step   14 

OK → See step   13