P3246

L110F HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P3246-202: Short in Drive Motor "A" Inverter Circuit

DTC P3246-202 - Short in Drive Motor "A" Inverter Circuit

DESCRIPTION

For a description of the inverter, P0A78-266.






INSPECTION PROCEDURE
NOTICE:
- DTC P3246-202 is stored after any of DTCs P0A78-113, 128, 284, 286, 287, 505, 506, 806, 807 and 808 are stored. After troubleshooting and repairing DTC P3246-202, be sure to troubleshoot all the other DTCs.
- The monitor cable and hybrid vehicle transmission assembly may be affected depending on the vehicle operating conditions if a short occurs in the inverter with converter assembly. If DTC P3246-202 is output, inspect the motor cable and hybrid vehicle transmission assembly and replace the defective parts.
- After completing the repair, test-drive the vehicle at a speed of approximately 25 mph (40 km/h) for 1 minute and check that DTC P0A90-251 (Driver Motor "A" Performance) is not output. If DTC P0A90-251 (Driver Motor "A" Performance) is output, replace the hybrid vehicle transmission assembly.

PROCEDURE

1. CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (MG2)
CAUTION: Be sure to wear insulated gloves.
(a) Remove the service plug grip. L110F Hybrid Vehicle Control System

NOTE: 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) Check that the service plug grip is not installed.
(c) Disconnect the generator cable and motor cable from the inverter with converter assembly.
HINT: For the removal and installation procedures related to the generator cable and motor cable, Components.





(d) Check MG2 for an interphase short using a milliohmmeter.
(1) Using a milliohmmeter, measure the resistance according to the value(s) in the table below.
HINT: If the MG2 temperature is high, the resistance will vary greatly from the specification. Therefore, measure the resistance at least 8 hours after the vehicle is stopped.

Standard resistance:





To correct the variation of the measured resistance due to temperature, use the following formula to calculate the resistance at 68° F (20°C).
R20 = Rt / {1 + 0.00393 X (T - 20)}
The calculation is based on the following:
R20: Resistance at 68° F (20°C) (mOhms)
Rt: Measured resistance (mOhms)
T: Temperature when the resistance is measured (°C)
(e) Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.
NOTE: Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

Standard resistance:






NG -- CHECK MOTOR CABLE
OK -- Continue to next step.
2. REPLACE INVERTER WITH CONVERTER ASSEMBLY
(a) Replace the inverter with converter assembly Components.
NEXT -- CHECK DTC OUTPUT (HV)
3. CHECK MOTOR CABLE P0A78-128

NG -- REPLACE MOTOR CABLE
OK -- Continue to next step.
4. REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY
(a) Replace the hybrid vehicle transmission assembly Components.
NEXT -- Continue to next step.
5. REPLACE INVERTER WITH CONVERTER ASSEMBLY
(a) Replace the inverter with converter assembly Components.
NEXT -- CHECK DTC OUTPUT (HV)
6. REPLACE MOTOR CABLE
(a) Replace the motor cable Components.
NEXT -- Continue to next step.
7. REPLACE INVERTER WITH CONVERTER ASSEMBLY
(a) Replace the inverter with converter assembly Components.
NEXT -- Continue to next step.
8. CHECK DTC OUTPUT (HV)
(a) Check the other DTCs that were output together with DTC P3246-202.





NOTE: DTC P3246-202 is stored after any of DTCs P0A78-113, 128, 284, 286, 287, 505, 506, 806, 807 and 808 are stored. After troubleshooting and repairing DTC P3246-202, be sure to troubleshoot all the other DTCs.

NEXT -- GO TO DTC CHART