DESCRIPTION The cause of this malfunction may be the motor resolver.
Check the motor resolver internal resistance and the connection condition from the inverter to the resolver. Related Parts Check |
Area | Inspection | |
Wire harness and connector between the inverter and motor resolver |
Check for short circuit between wire harness and +B side. | |
Resolver, wire harness, connector | Check the internal resistance of resolver (including wire harness), body ground resistance, and connector connection condition. | |
Resolver | Check for open or short circuit of the resolver | SYSTEM DESCRIPTION
A
resolver is a sensor that is used to detect the position of the
magnetic poles of the rotor of a motor. Knowing the position of the
poles is indispensable for ensuring precise control of the motor (MG2). Each
resolver contains a stator that has an excitation coil and 2 detection
coils (S, C). The gap between the stator and rotor changes as the rotor
turns because the rotor is oval shaped. An alternating current with a
predetermined frequency flows through the excitation coil, and detection
coils S and C output alternating currents in accordance with the sensor
rotor position. The MG ECU, which is built into
the inverter with converter assembly, detects the absolute position of
the rotor according to the phases of detection coils S and C and the
heights of their waveforms. Furthermore, the CPU calculates the amount
of change in the position within a predetermined length of time, in
order to use the resolver as a revolution speed sensor. The MG ECU monitors signals output from the motor resolver and detects malfunctions.
 WIRING DIAGRAM
 CAUTION / NOTICE / HINT
This diagnostic procedure is referenced to in the diagnostic procedure of several DTCs.
If the result of this diagnostic procedure is normal, proceed as directed in the procedure for the DTC.
CAUTION:
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 
HINT:
- If the problem symptom cannot be reproduced, performing a road test on a
road on which the vehicle tends to vibrate will make it easier to
reproduce the symptom.
- If the resolver is malfunctioning, the vehicle may not drive smoothly.
- When inspecting the connectors, if it is difficult to judge if a
connector was disconnected, deformed or improperly secured, disconnect
and reconnect the connector and then check for DTCs again. Check if the
same DTC is output. If the same DTC is not output, improper connection
of connectors is suspected.
- As a malfunction detection threshold may be exceeded when performing the
vibration or heat connector inspections, make sure to perform the
following inspection to check that the DTC was not stored due to the
malfunction of a part.
PROCEDURE |
1. | CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - MOTOR RESOLVER) |
CAUTION: Be sure to wear insulated gloves. (a) Check that the service plug grip is not installed.
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) Disconnect the C61 inverter with converter assembly connector.
(c) Connect the cable to the negative (-) auxiliary battery terminal. (d) Turn the power switch on (IG).
| (e) Measure the voltage according to the value(s) in the table below.
Standard Voltage: |
Tester Connection | Condition |
Specified Condition | |
C61-5 (MRF) - Body ground |
Power switch on (IG) |
Below 1 V | |
C61-6 (MRFG) - Body ground |
Power switch on (IG) |
Below 1 V | |
C61-1 (MSN) - Body ground |
Power switch on (IG) |
Below 1 V | |
C61-2 (MSNG) - Body ground |
Power switch on (IG) |
Below 1 V | |
C61-4 (MCS) - Body ground |
Power switch on (IG) |
Below 1 V | |
C61-3 (MCSG) - Body ground |
Power switch on (IG) |
Below 1 V | NOTICE: Turning
the power switch on (IG) with the inverter with converter assembly
disconnected causes other DTCs to be stored. Clear the DTCs after
performing this inspection. |
 |
|
*a | Front view of wire harness connector
(to Inverter with Converter Assembly) | | |
(f) Turn the power switch off. (g) Disconnect the cable from the negative (-) auxiliary battery terminal and wait for 2 minutes or more.
(h) Reconnect the C61 inverter with converter assembly connector.
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK |
 | |
CAUTION: Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed. 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) Disconnect the C61 inverter with converter assembly connector.
| (c) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
C61-5 (MRF) - C61-6 (MRFG) |
Power switch off |
8.9 to 14.9 Ω | |
C61-1 (MSN) - C61-2 (MSNG) |
Power switch off |
16.2 to 28.1 Ω | |
C61-4 (MCS) - C61-3 (MCSG) |
Power switch off |
18.2 to 30.1 Ω | HINT: 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 (68°F) (mΩ)
Rt: Measured resistance (mΩ) T: Temperature when the resistance is measured (°C (°F).)
Standard Resistance (Check for Short): |
Tester Connection | Condition |
Specified Condition | |
C61-5 (MRF) or C61-6 (MRFG) - Body ground and other terminals |
Power switch off |
1 MΩ or higher | |
C61-1 (MSN) or C61-2 (MSNG) - Body ground and other terminals |
Power switch off |
1 MΩ or higher | |
C61-4 (MCS) or C61-3 (MCSG) - Body ground and other terminals |
Power switch off |
1 MΩ or higher | | |
|
|
*a | Front view of wire harness connector
(to Inverter with Converter Assembly) | | |
(d) Reconnect the C61 inverter with converter assembly connector.
| OK |
| MOTOR RESOLVER CIRCUIT NORMAL (PERFORM NEXT STEP FOR REFERENCED DTC) |
|
NG | |
| |
| 3. |
CHECK CONNECTOR CONNECTION CONDITION (RESOLVER CONNECTOR) |
| (a)
Check the connection condition of the resolver connector and the
contact pressure of each terminal. Check the terminals for deformation,
and check the connector for water ingress and foreign matter. Click here
OK: - The connector is connected securely.
- The terminals are not deformed and are connected securely. - No water or foreign matter in the connector. |
|
|
Result | Proceed to | |
OK | A | |
NG (The connector is not connected securely.) |
B | | NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) |
C |
| B |
| CONNECT SECURELY |
| C |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
A | |
| |
| 4. |
INSPECT HYBRID VEHICLE TRANSAXLE ASSEMBLY (MOTOR RESOLVER) |
| (a) Disconnect the C63 resolver connector. | |
| (b) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
C63-6 (MRF) - C63-9 (MRFG) |
Power switch off |
8.8 to 14.8 Ω | |
C63-4 (MSN) - C63-5 (MSNG) |
Power switch off |
16.2 to 28.0 Ω | |
C63-10 (MCS) - C63-14 (MCSG) |
Power switch off |
18.1 to 30.0 Ω | HINT: 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 (68°F) (mΩ)
Rt: Measured resistance (mΩ) T: Temperature when the resistance is measured (°C (°F).)
Standard Resistance (Check for Short): |
Tester Connection | Condition |
Specified Condition | |
C63-6 (MRF) - Body ground and other terminals (except C63-9 (MRFG)) |
Power switch off |
1 MΩ or higher | |
C63-9 (MRFG) - Body ground and other terminals (except C63-6 (MRF)) |
Power switch off |
1 MΩ or higher | |
C63-4 (MSN) - Body ground and other terminals (except C63-5 (MSNG)) |
Power switch off |
1 MΩ or higher | |
C63-5 (MSNG) - Body ground and other terminals (except C63-4 (MSN)) |
Power switch off |
1 MΩ or higher | |
C63-10 (MCS) - Body ground and other terminals (except C63-14 (MCSG)) |
Power switch off |
1 MΩ or higher | |
C63-14 (MCSG) - Body ground and other terminals (except C63-10 (MCS)) |
Power switch off |
1 MΩ or higher | |
 |
|
*a | Component without harness connected
(Motor Resolver (Hybrid Vehicle Transaxle Assembly)) | | |
(c) Reconnect the C63 resolver connector.
| OK |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
| NG |
| REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY | | 
