P0A4C

L110 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0A4B-253-P0A4D-255: Generator Position Sensor Circuit
P0A4D-255 - Generator Position Sensor Circuit Low

DESCRIPTION

A resolver is a sensor that detects the position of the magnetic poles, which are indispensable for ensuring highly efficient control of MG2 and MG1.

The generator resolver structure and method of connection with the inverter with converter assembly are the same as those of the motor resolver.

The inverter with converter assembly monitors output signals from the generator resolver and detects malfunctions.

MONITOR DESCRIPTION

The MG ECU monitors the generator resolver output signal. If the MG ECU detects output signals that are out of the normal range or specification, it will conclude that there is a malfunction of the generator resolver. The hybrid vehicle control ECU will illuminate the MIL and set a DTC.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

COMPONENT OPERATING RANGE

WIRING DIAGRAM

INSPECTION PROCEDURE

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, check the voltage at the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
NOTICE:
Check for output DTCs again after the repair has been completed. If P0A78-286 or P0A7A-324 is output, replace the inverter with converter assembly.

HINT
- Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
- If the problem symptom cannot be reproduced, performing a road test on a road on which the vehicle tends to vibrate will make it easier to reproduce the symptom.
- If INF code 253 is output, there may be an interphase short in the generator resolver circuit due to an intrusion of water into the resolver. Therefore, if the problem symptom cannot be reproduced, replace the hybrid vehicle transmission assembly last.

PROCEDURE

1. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR)

(a) Check the connection of the low voltage connector of the inverter with converter assembly.

Result:

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

NG -- CONNECT SECURELY
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - GENERATOR RESOLVER)

CAUTION:
Be sure to wear insulated gloves.

(a) Turn the power switch off and remove the service plug grip L110 Hybrid Vehicle Control System.

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

(b) Disconnect connector A60 from the inverter with converter assembly.

(c) Turn the power switch on (IG).

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

Standard voltage:

NOTICE:
Turning the power switch on (IG) with the low voltage connector of the inverter with converter assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. CHECK GENERATOR RESOLVER

(a) Turn the power switch off.

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

Standard resistance (Check for open):

OK -- REPLACE INVERTER WITH CONVERTER ASSEMBLY
NG -- Continue to next step.

4. CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR)

(a) Check the connection of the generator resolver connector.

Result:

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

NG -- CONNECT SECURELY
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - GENERATOR RESOLVER)

(a) Disconnect connector E87 from the generator resolver.

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

Standard resistance (Check for open):

Standard resistance (Check for short):

HINT
The generator resolver is not available separately. If it requires replacement, replace the hybrid vehicle transmission assembly.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Components