P3246
L110F HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P3246-202: Short in Drive Motor "A" Inverter Circuit
P3246-202 - Short in Drive Motor "A" Inverter Circuit
DESCRIPTION
For a description of the inverter, P0A78.
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 Hybrid 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) 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:
HINT
- 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.
NOTICE:
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 Installation.
NEXT -- CHECK DTC OUTPUT (HV)
3. CHECK MOTOR CABLE P0A78
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 Installation.
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 Installation.
NEXT -- Continue to next step.
8. CHECK DTC OUTPUT (HV)
(a) Check the other DTCs that were output together with DTC P3246-202.
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.
NEXT -- GO TO DTC CHART Hybrid Control System