HYBRID CONTROL SYSTEM, Diagnostic DTC:P0343-886

DTC Code	DTC Name
P0343-886	Camshaft Position Sensor "A" Circuit High Input

DESCRIPTION

Refer to the description for DTC P0338-885 Click here.

DTC No.	INF Code	DTC Detection Condition	Trouble Area
P0343	886	Malfunction in the engine speed sensor (GI signal) circuit	Wire harness or connector Hybrid vehicle control ECU ECM Camshaft position sensor Inverter with converter assembly

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0338-885 Click here.

CAUTION / NOTICE / HINT

CAUTION:

Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

Tech Tips

Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

PROCEDURE

CHECK DTC OUTPUT (HV)

Connect the intelligent tester to the DLC3.
Turn the power switch on (IG).
Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

Check if DTCs are output.

Result

Result	Proceed to
P0343-886 only is output.	A
P0343-747 is also output.	B

CHECK HYBRID VEHICLE CONTROL ECU Click here

CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)
1. Check the connections of the hybrid vehicle control ECU connectors.
  
  OK
  
  The connectors are connected securely and there are no contact problems.
NG
CONNECT SECURELY

OK
CHECK CONNECTOR CONNECTION CONDITION (ECM CONNECTOR)
1. Check the connections of the ECM connectors.
  
  OK
  
  The connectors are connected securely and there are no contact problems.
NG
CONNECT SECURELY

OK

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

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

CHECK HYBRID VEHICLE CONTROL ECU (CHECK WAVEFORM)


*1	Component with harness connected: (Hybrid Vehicle Control ECU)

Connect an oscilloscope to the hybrid vehicle control ECU terminals specified in the table below, and measure the waveform.

Item	Contents
Terminal	A77-14 (GI) - A77-7 (E1)
Equipment Setting	5 V/DIV., 20 ms./DIV.
Condition	Power switch on (READY) with engine running

Result

Result	Proceed to
Normal	A
Waveform is flat, and is stuck on the +B side.	B
Waveform is flat, and is stuck on the GND side.	C

CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU) Click here

CHECK HYBRID VEHICLE CONTROL ECU Click here

CHECK FOR INTERMITTENT PROBLEMS
1. Check for intermittent problems Click here.
OK
REPLACE HYBRID VEHICLE CONTROL ECU Click here

NG
REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU)

*1 Component with harness connected: (ECM)

Turn the power switch on (IG).

*1	Component with harness connected: (ECM)

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

Standard voltage

Tester Connection	Switch Condition	Specified Condition
A14-19 (GO1) - Body ground	Power switch on (IG)	10 to 14 V

REPLACE ECM Click here

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK HYBRID VEHICLE CONTROL ECU

Turn the power switch off.
Disconnect connector A77 from the hybrid vehicle control ECU.


*1	Component without harness connected: (Hybrid Vehicle Control ECU)

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

Standard resistance

Tester Connection	Switch Condition	Specified Condition
A77-14 (GI) - A77-7 (E1)	Power switch off	10 kΩ or higher

REPLACE HYBRID VEHICLE CONTROL ECU Click here

CHECK INVERTER WITH CONVERTER ASSEMBLY (MG ECU)

CAUTION:

Be sure to wear insulated gloves.

Turn the power switch off.
Remove the service plug grip Click here.
Disconnect the low voltage connector from the inverter with converter assembly.

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

Standard resistance

LHD

Tester Connection	Switch Condition	Specified Condition
A79-16 (GI) - A79-30 (GND1)	Power switch off	10 kΩ or higher

RHD

Tester Connection	Switch Condition	Specified Condition
A88-16 (GI) - A88-30 (GND1)	Power switch off	10 kΩ or higher

Result

Result	Proceed to
OK	A
NG (for LHD)	B
NG (for RHD)	C

REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - ECM)

Disconnect connector A14 from the ECM.


*1	Rear view of wire harness connector: (to Hybrid Vehicle Control ECU)
*2	Rear view of wire harness connector: (to ECM)

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

Standard resistance (Check for open)

Tester Connection	Switch Condition	Specified Condition
A77-14 (GI) - A14-19 (GO1)	Power switch off	Below 1 Ω

Standard resistance (Check for short)

Tester Connection	Switch Condition	Specified Condition
A77-14 (GI) or A14-19 (GO1) - Body ground and other terminals	Power switch off	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK ECM


*1	Rear view of wire harness connector: (to ECM)

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

Standard resistance

Tester Connection	Switch Condition	Specified Condition
A14-19 (GO1) - Body ground	Power switch off	10 kΩ or higher

REPLACE HYBRID VEHICLE CONTROL ECU Click here

REPLACE ECM Click here