P0A7A-130

L110 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0A7A-130: Generator Inverter Performance

DTC P0A7A-130 - Generator Inverter Performance

DESCRIPTION

For a description of the inverter, P0A78-266.
If an abnormal amount of current flows through the generator inverter, the MG ECU detects it and sends a signal to inform the hybrid vehicle control ECU of the malfunction.

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

PROCEDURE

1. CHECK DTC OUTPUT (HV)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(d) Check if DTCs are output.
Result:

HINT: P0A7A-130 may be set due to a malfunction which also causes DTCs in the table above to be set. In this case, first troubleshoot the output DTCs in the table above. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.

YES -- GO TO DTC CHART
NO -- Continue to next step.
2. CHECK AMOUNT OF GASOLINE
(a) Turn the power switch on (IG).
(b) Check the amount of fuel by referring to the fuel gauge in the meter.
OK:
Proper amount of fuel is in the tank.
NG -- REFUEL VEHICLE
OK -- Continue to next step.
3. CHECK ENGINE START
(a) Turn the power switch on (READY).
(b) Check if the engine starts.
HINT: Depressing the accelerator pedal with the shift lever in the P position will cause the engine start.

OK:
The engine starts.
OK -- CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR)
NG -- Continue to next step.
4. INSPECT CRANKSHAFT PULLEY REVOLUTION (P POSITION)
(a) Turn the power switch off, move the shift lever to the P position, and lift up the vehicle.
(b) Turn the crankshaft pulley using hand tools to check if the crankshaft pulley can rotate.
CAUTION: Do not turn the power switch on (READY) while performing this inspection. Be sure to turn the power switch off before performing this inspection, to prevent the engine from starting.

OK:
The crankshaft pulley rotates.
OK -- CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR)
NG -- Continue to next step.
5. INSPECT CRANKSHAFT PULLEY REVOLUTION (N POSITION)
(a) Lower the vehicle.
(b) Turn the power switch off, move the shift lever to the N position, and lift up the vehicle.
(c) Turn the crank pulley using hand tools to check if the crankshaft pulley can rotate.
CAUTION: Do not turn the power switch on (READY) while performing this inspection. Be sure to turn the power switch off before performing this inspection, to prevent the engine from starting.

OK:
The crankshaft pulley rotates.
OK -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY
NG -- REPAIR OR REPLACE ENGINE ASSEMBLY
6. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR)
(a) Lower the vehicle.

(b) 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.
7. 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.
NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair procedure 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:

NOTE: 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.
8. 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):

NG -- CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR)
OK -- Continue to next step.
9. CHECK INVERTER WITH CONVERTER ASSEMBLY (GENERATOR CABLE CONNECTION CONDITION)
CAUTION: Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.

(b) Check that the bolts for the generator cable are tightened to the specified torque.
NOTE: Make sure that the tightening torque of the bolts is between 6.4 and 9.6 N*m (65 and 98 kgf*cm, 57 and 85 in.*lbf).

Torque: 8.0 Nm (82 kgf-cm, 71 in-lbf)
NG -- TIGHTEN TO SPECIFIED TORQUE
OK -- Continue to next step.
10. CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG1)
(a) Check that the service plug grip is not installed.
CAUTION: Be sure to wear insulated gloves.
(b) Disconnect the generator cable and motor cable from the inverter with converter assembly Components.

(c) Using a milliohmmeter, measure the resistance according to the value(s) in the table below. (Check MG1 for an interphase short.)
HINT: If the MG1 temperature is high, the resistance varies greatly. 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 20°C (68° F).
R20 = Rt / {1 + 0.00393 X (T - 20)}
The calculation is based on the following:
R20: Resistance at 20°C (mOhms)
Rt: Measured resistance (mOhms)
T: Temperature when the resistance is measured (° C)
(d) 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 HYBRID VEHICLE TRANSMISSION ASSEMBLY (GENERATOR CABLE CONNECTION CONDITION)
OK -- REPLACE INVERTER WITH CONVERTER ASSEMBLY
11. 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.
12. 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
13. CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (GENERATOR CABLE CONNECTION CONDITION)

(a) Remove the hybrid vehicle transmission assembly Components.
(b) Check that the bolts for the generator cable are tightened to the specified torque.
NOTE: Make sure that the tightening torque of the bolts is between 6.4 and 9.6 N*m (65 and 98 kgf*cm, 57 and 85 in.*lbf).

Torque: 8.0 Nm (82 kgf-cm, 71 in-lbf)
NG -- TIGHTEN TO SPECIFIED TORQUE
OK -- Continue to next step.
14. CHECK GENERATOR CABLE
(a) Remove the generator cable from the transmission Components.

(b) 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:

(c) Measure the resistance of each conductor in the generator cable according to the value(s) in the table below.
Standard resistance:

NG -- REPLACE GENERATOR CABLE
OK -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY