Drive Motor "A" Control Module Internal Electronic Failure (P0A1B49)
DESCRIPTION
The motor
generator control ECU (MG ECU), which is built into the inverter with
converter assembly, monitors its internal operation and will store DTCs
if the system is malfunctioning.
|
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
MIL | Warning Indicate |
|
P0A1B49 | Drive Motor "A" Control Module Internal Electronic Failure |
MG ECU internal malfunction: Calculation check error (1 trip detection logic) |
Inverter with converter assembly |
Comes on | Master Warning Light:
Comes on |
MONITOR DESCRIPTION
The
MG ECU (in the inverter with converter assembly) performs many
diagnostic tests to verify proper operation of internal ECU systems. In
one of these tests, the MG ECU checks for an R/D (Resolver/Digital
converter) malfunction involving the motor resolver. If the MG ECU
detects an R/D converter error, it will conclude that there is an
internal malfunction involving the motor resolver and the hybrid vehicle
control ECU will illuminate the MIL and store a DTC.
MONITOR STRATEGY
|
Related DTCs | P0A1B (INF P0A1B49): Drive motor "A" control module performance |
|
Required sensors/components | Inverter with converter assembly (MG ECU) |
|
Frequency of operation | Continuous |
|
Duration | TMC's intellectual property |
|
MIL operation | Immediately |
|
Sequence of operation | None |
TYPICAL ENABLING CONDITIONS
|
The monitor will run whenever the following DTCs are not stored |
TMC's intellectual property |
| Other conditions belong to TMC's intellectual property |
- |
TYPICAL MALFUNCTION THRESHOLDS
|
TMC's intellectual property |
- |
COMPONENT OPERATING RANGE
|
Hybrid vehicle control ECU | DTC P0A1B (INF P0A1B49) is not detected |
CONFIRMATION DRIVING PATTERN
HINT:
- After repair has been completed, clear the DTC and then check that the
vehicle has returned to normal by performing the following All Readiness
check procedure.
Click here 
- When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG) and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off and wait for 2 minutes or more.
- Turn the power switch on (IG) and turn the Techstream on.
- With power switch on (IG) and wait for 5 seconds or more. [*1]
HINT:
[*1] : Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
- Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.
PROCEDURE
|
1. | REPLACE INVERTER WITH CONVERTER ASSEMBLY |
Click here
| NEXT |
 | END |
Drive Motor "A" Control Module Unexpected Operation (P0A1B94)
DTC SUMMARY
MALFUNCTION DESCRIPTION
The hybrid vehicle control ECU monitors the motor generator control ECU (MG ECU).
The cause of this malfunction may be the following:
Motor generator control ECU internal malfunction
- Motor generator control ECU (MG ECU) malfunction
DESCRIPTION
The
hybrid vehicle control ECU monitors the motor generator control ECU (MG
ECU) and stores this DTC when it detects a malfunction.
|
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
MIL | Warning Indicate |
|
P0A1B94 | Drive Motor "A" Control Module Unexpected Operation |
The
motor generator control ECU (MG ECU) value received by the hybrid
vehicle control ECU exceeds the threshold for a certain period of time. (1 trip detection logic) |
- Inverter with converter assembly
- Fusible link block assembly (IGCT fuse)
- IGCT relay
| Comes on |
Master Warning Light: Comes on |
MONITOR DESCRIPTION
The
hybrid vehicle control ECU monitors the motor generator control ECU (MG
ECU). If the internal operation is malfunctioning, the hybrid vehicle
control ECU illuminates the MIL and stores a DTC.
MONITOR STRATEGY
|
Related DTCs | P0A1B (INF P0A1B94): Drive motor "A" control module |
|
Required sensors/components | Inverter with converter assembly (MG ECU) |
|
Frequency of operation | Continuous |
|
Duration | TMC's intellectual property |
|
MIL operation | 1 driving cycle |
|
Sequence of operation | None |
TYPICAL ENABLING CONDITIONS
|
The monitor will run whenever the following DTCs are not stored |
TMC's intellectual property |
| Other conditions belong to TMC's intellectual property |
- |
TYPICAL MALFUNCTION THRESHOLDS
|
TMC's intellectual property | - |
COMPONENT OPERATING RANGE
|
Hybrid vehicle control ECU | DTC P0A1B (INF P0A1B94) is not detected |
CONFIRMATION DRIVING PATTERN
HINT:
- After repair has been completed, clear the DTC and then check that the
vehicle has returned to normal by performing the following All Readiness
check procedure.
Click here 
- When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG) and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off and wait for 2 minutes or more.
- Turn the power switch on (IG) and turn the Techstream on.
- With power switch on (IG) and wait for 2 minutes or more. [*1]
HINT:
- Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
- Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
After
turning the power switch off, waiting time may be required before
disconnecting the cable from the negative (-) auxiliary battery
terminal. Therefore, make sure to read the disconnecting the cable from
the negative (-) auxiliary battery terminal notices before proceeding
with work.
Click here
PROCEDURE
| 1. |
CHECK AUXILIARY BATTERY TERMINAL (CONTACT PROBLEM) |
(a) Check the connection of the negative (-) and positive (+) auxiliary battery terminals.
OK:
The terminals are connected securely and there is no contact problem.
HINT:
If
performing a reproduction test, turn the power switch on (IG) and shake
the wire harnesses vertically and horizontally before checking for
DTCs.
| NG |
 | GO TO STEP 6 |
|
OK |
 | |
| 2. |
CHECK GROUND WIRE CONNECTION CONDITION |
| (a) Check the installation condition of the ground wires MA. OK:
The ground wires MA are securely installed. HINT: If
performing a reproduction test, turn the power switch on (IG) and shake
the wire harnesses vertically and horizontally before checking for
DTCs. | |
| NG |
| GO TO STEP 7 |
|
OK | |
| |
| 3. |
CHECK FUSIBLE LINK (IGCT) |
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the cable from the positive (+) auxiliary battery terminal.
(c) Check the fusible link block assembly (IGCT) for improper installation.
OK:
The fusible link block assembly is installed securely and there is no contact problem.
| (d) Disconnect the 7B fusible link block assembly connector. |
|
| (e) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
7B-1 - A-1 (Positive (+) auxiliary battery terminal) |
Power switch off |
Below 1 Ω | |
 |
|
*1 | Fusible Link Block Assembly | |
*a | Component without harness connected
(Fusible Link Block Assembly) | | |
(f) Reconnect the 7B fusible link block assembly connector.
(g) Reconnect the cable from the positive (+) auxiliary battery terminal.
(h) Reconnect the cable from the negative (-) auxiliary battery terminal.
| NG |
| GO TO STEP 8 |
|
OK | |
| |
(a) Check the IGCT relay for improper installation.
OK:
The relay is installed securely.
HINT:
If
performing a reproduction test, turn the power switch on (IG) and
gently vibrate the IGCT relay with a finger before checking for DTCs.
| (b) Remove the IGCT relay from the No. 3 relay block. |
 |
|
*1 | No. 3 Relay Block | |
*2 | IGCT Relay | | |
| (c) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
3 - 5 | Auxiliary battery voltage not applied between terminals 1 and 2 |
10 kΩ or higher | |
Auxiliary battery voltage applied between terminals 1 and 2 |
Below 1 Ω | | |
(d) Install the IGCT relay.
| NG | |
GO TO STEP 9 |
|
OK | |
| |
| 5. |
CHECK DTC OUTPUT (HYBRID CONTROL) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
(d) Check for DTCs.
HINT:
Check the DTCs that were output when the vehicle was brought to the workshop.
Powertrain > Hybrid Control > Trouble Codes
|
Result | Proceed to |
|
P0A1B94 only is output |
A |
| DTCs except P0A1B94 are output |
B |
(e) Turn the power switch off.
| A |
| REPLACE INVERTER WITH CONVERTER ASSEMBLY |
| B |
| GO TO DTC CHART (HYBRID CONTROL SYSTEM) |
| NEXT |
| GO TO STEP 10 |
| NEXT |
| GO TO STEP 10 |
| 8. |
REPAIR OR REPLACE MALFUNCTIONING PARTS |
| NEXT |
| GO TO STEP 10 |
| 9. |
REPAIR OR REPLACE MALFUNCTIONING PARTS |
|
NEXT | |
| |
Click here
|
NEXT | |
| |
(a) Turn the power switch off and wait for 2 minutes or more.
(b) Turn the power switch on (IG) and wait for 2 minutes or more.
(c) Turn the power switch off.
|
NEXT | |
| |
| 12. |
CHECK DTC OUTPUT (HYBRID CONTROL) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
Powertrain > Hybrid Control > Trouble Codes
(d) Check for DTCs.
|
Result | Proceed to |
|
No DTCs are output | A |
|
P0A1B94 only is output |
B |
| DTCs except P0A1B94 are output |
C |
(e) Turn the power switch off.
| A |
| END |
| B |
| REPLACE INVERTER WITH CONVERTER ASSEMBLY |
| C |
| GO TO DTC CHART (HYBRID CONTROL SYSTEM) |
Drive Motor "A" Temperature Sensor Voltage Out of Range (P0A2A1C,P0A2A1F)
DTC SUMMARY
MALFUNCTION DESCRIPTION
These
DTCs are stored when the motor temperature sensor output is abnormal.
The cause of this malfunction may be one of the following:
Hybrid vehicle control ECU malfunction
- Hybrid vehicle control ECU internal malfunction
Motor temperature sensor malfunction
- Internal motor temperature sensor malfunction
- Open or short in motor temperature sensor
Wire harness between the motor temperature sensor and hybrid vehicle control ECU
- The connectors are not connected properly
- Foreign matter or water on the connector terminals
- Open or short in wire harness
HINT:
If any
of these DTCs are stored, the motor temperature sensor is malfunctioning
and the self-protection function may not operate. Therefore under
certain high load driving condition, the temperature of the motor (MG2)
becomes high. If the self-protection function does not operate, the
motor (MG2) may malfunction and cause the vehicle to enter fail-safe
mode.
DESCRIPTION
Refer to the description for DTC P0A2A11.
Click here 
|
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
MIL | Warning Indicate |
|
P0A2A1C | Drive Motor "A" Temperature Sensor Voltage Out of Range |
After a long soak, the value of the motor (MG2) temperature sensor is different from the value of the other temperature sensors.
(2 trip detection logic) |
Motor temperature sensor (Hybrid vehicle transaxle assembly) |
Comes on | Master Warning Light:
Comes on |
| P0A2A1F |
Drive Motor "A" Temperature Sensor Circuit Intermittent |
Sudden change in motor temperature sensor output or hunting: Unusual
sudden change in motor temperature sensor output occurs and offset
condition continues for a certain period of time, or unusual change in
motor temperature sensor output occurs repeatedly. (1 trip detection logic) |
Motor temperature sensor (Hybrid vehicle transaxle assembly) |
Comes on | Master Warning Light:
Comes on |
Related Data List |
DTC No. | Data List |
|
P0A2A1C |
- Generator Temperature
- Motor Temperature
- Inverter Coolant Water Temperature
|
| P0A2A1F |
Motor Temperature |
MONITOR DESCRIPTION
If
the hybrid vehicle control ECU detects a malfunction of the motor
temperature sensor, it will illuminate the MIL and store a DTC.
MONITOR STRATEGY
|
Related DTCs | P0A2B (INF P0A2A1C): Drive Motor "A" Temperature Sensor Circuit Range/Performance
P0A2E (INF P0A2A1F): Drive Motor "A" Temperature Sensor Circuit Intermittent |
|
Required sensors/components | Motor temperature sensor |
|
Frequency of operation | Continuous |
|
Duration | TMC's intellectual property |
|
MIL operation | 2 driving cycle / 1 driving cycle |
|
Sequence of operation | None |
TYPICAL ENABLING CONDITIONS
|
The monitor will run whenever the following DTCs are not present |
TMC's intellectual property |
| Other conditions belong to TMC's intellectual property |
- |
TYPICAL MALFUNCTION THRESHOLDS
|
TMC's intellectual property |
- |
COMPONENT OPERATING RANGE
|
Hybrid vehicle control ECU | DTC P0A2B (INF P0A2A1C) is not detected
DTC P0A2E (INF P0A2A1F) is not detected |
CONFIRMATION DRIVING PATTERN
HINT:
- After repair has been completed, clear the DTC and then check that the
vehicle has returned to normal by performing the following All Readiness
check procedure.
Click here
- When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
DTC P0A2A1C
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG) and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off.
- Leave the vehicle as is for 5 hours or more and then check the values of
the Data List items "Generator Temperature", "Motor Temperature" and
"Inverter Coolant Water Temperature". [*1]
- Turn the power switch on (IG) and turn the Techstream on. [*2]
HINT:
[*1] to [*2]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
- Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.
DTC P0A2A1F
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG) and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off and wait for 2 minutes or more.
- Turn the power switch on (IG) and turn the Techstream on.
- With power switch on (IG) and wait for 5 seconds or more. [*1]
HINT:
[*1] : Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
- Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.
PROCEDURE
|
1. | CHECK DTC OUTPUT (ENGINE) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Engine / Trouble Codes.
(d) Check for DTCs.
Powertrain > Engine > Trouble Codes
|
Result | Proceed to |
|
No DTCs are output, or DTCs except the ones in the table below are also output. |
A |
| Any of the following DTCs are also output. |
B |
|
Relevant DTC |
| P261029 |
ECM/PCM Engine Off Timer Performance Signal Invalid |
(e) Turn the power switch off.
| B |  |
GO TO DTC CHART (SFI SYSTEM) |
|
A |
 | |
| 2. |
CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) |
Click here
| OK |
| REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY |
| NG |
| CONNECT SECURELY |
