P0A1C-715
P310 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0A1C-715: Drive Motor "B" Control Module
DTC P0A1C-715 - Drive Motor "B" Control Module
DTC P0A1C-798 - Drive Motor "B" Control Module
DTC P0A1C-799 - Drive Motor "B" Control Module
DESCRIPTION
The MG ECU monitors its internal operation and detects malfunctions.
HINT: The term "drive motor B" indicates MGR.
MONITOR DESCRIPTION
The MG ECU performs many diagnostic tests to verify proper operation of internal ECU systems. In this diagnostic monitor, the MG ECU checks for an R/D (Resolver/Digital Converter) malfunction involving the rear motor resolver. If MG ECU detects an R/D error, it will conclude that there is an internal malfunction involving the rear motor 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 5 minutes before touching any of the high-voltage connectors or terminals. After waiting for 5 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.
HINT: Waiting for at least 5 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:
B -- GO TO DTC CHART Diagnostic Trouble Code Descriptions
A -- Continue to next step.
2. CHECK CONNECTOR CONNECTION CONDITION (MG ECU CONNECTOR)
CAUTION: Be sure to wear insulated gloves.
(a) Turn the power switch off.
(b) Remove the service plug grip Removal.
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.
(c) Remove the inverter cover Removal.
NOTICE:
- Wrap the round interlock terminal for the inverter cover with insulating tape to prevent it from shorting to ground.
- Prevent coolant in the inverter reserve tank from entering the inverter.
- Removing the inverter cover causes the MG ECU board to be exposed. Therefore, temporarily install the inverter cover for each area to be inspected.
(d) Check the connections of the MG ECU connectors.
OK:
The connectors are connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (MG ECU - BODY GROUND)
CAUTION: Be sure to wear insulated gloves.
(a) Turn the power switch off.
(b) Remove the service plug grip Removal.
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.
(c) Remove the inverter cover Removal.
NOTICE:
- Wrap the round interlock terminal for the inverter cover with insulating tape to prevent it from shorting to ground.
- Prevent coolant in the inverter reserve tank from entering the inverter.
- Removing the inverter cover causes the MG ECU board to be exposed. Therefore, temporarily install the inverter cover for each area to be inspected.
(d) Disconnect the A42 connector from the MG ECU.
(e) Turn the power switch on (IG).
(f) Measure the voltage according to the value(s) in the table below.
Standard voltage:
NOTE: Turning the power switch on (IG) with the MG ECU connectors disconnected causes other DTCs to be stored. Clear the DTCs after performing the inspection.
(g) Turn the power switch off.
(h) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
(i) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for short):
NG -- CHECK CONNECTOR CONNECTION CONDITION (REAR MOTOR RESOLVER CONNECTOR)
OK -- Continue to next step.
4. CHECK CONNECTOR CONNECTION CONDITION (REAR MOTOR RESOLVER CONNECTOR)
(a) Check the connection of the rear motor resolver connector.
OK:
The connector is connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- REPLACE INVERTER WITH CONVERTER ASSEMBLY
5. CHECK CONNECTOR CONNECTION CONDITION (REAR MOTOR RESOLVER CONNECTOR)
(a) Check the connection of the rear motor resolver connector.
OK:
The connector is connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- Continue to next step.
6. CHECK REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY (REAR MOTOR RESOLVER)
(a) Disconnect the j7 rear motor resolver connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
(c) Using a megohmmeter set to 500 V, measure the insulation 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:
HINT: The rear motor resolver is not available separately. If it requires replacement, replace the rear traction motor with transaxle assembly.
NG -- REPLACE REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR