PRECAUTION
- NOTICE FOR HYBRID SYSTEM ACTIVATION When the warning light is illuminated or the battery has been disconnected and reconnected, pressing the power switch may not start the system on the first try. If so, press the power switch again.
- CAN COMMUNICATION SYSTEM PRECAUTIONS The CAN communication system is used for data communication between the transmission control ECU assembly, the hybrid vehicle control ECU and other ECUs. If there are any problems in the CAN communication lines, corresponding DTCs for the communication lines are output. If any CAN communication line DTCs are output, repair the malfunction in the communication lines and troubleshoot the electronic shift lever system after data communication becomes normal.
- LIN COMMUNICATION SYSTEM PRECAUTIONS The LIN communication system is used for data communication between the transmission control ECU assembly, the certification ECU and other ECUs. If there are any problems in the LIN communication lines, park (P) cannot be disengaged. If any LIN communication line DTCs are output, repair the malfunction in the communication lines and troubleshoot the electric shift lever system after data communication becomes normal.
- DTC PRECAUTION It is not possible to clear the following DTCs using the Techstream: DTC C2300 (Actuator System Malfunction), C2301 (Shift Changing Time Malfunction), C2303 (Short in Power Source Relay Circuit), C2304 (Open or Short Circuit in U Phase), C2305 (Open or Short Circuit in V Phase), C2306 (Open or Short Circuit in W Phase), C2307 (Power Supply) and C2309 (Open in B+ Circuit). After the repair, it is necessary to disconnect the P CON MAIN fuse and wait for at least 60 seconds to clear the DTCs.
Scheme 93
Scheme 94
Scheme 95
Scheme 96
Scheme 97
Scheme 98
Scheme 99
Scheme 100
Scheme 101
- SYSTEM DESCRIPTION The electronic shift lever system electrically controls the parking lock mechanism by using an actuator. The transmission control ECU assembly locks/unlocks gearshift control based on lock/unlock request signals from the certification ECU (smart key ECU assembly). The transmission control ECU assembly controls the shift control actuator when gearshift control is unlocked, and also controls the entire system based on information from the hybrid vehicle control ECU. The transmission control ECU assembly detects DTCs when there are any malfunctions in the system, and informs the driver of selected malfunctions by illuminating the P position switch indicator light and master warning light, and indicating an error message on the multi-display.
- SYSTEM DIAGRAM INPUT AND OUTPUT SIGNALS OF EACH ECU Transmitting ECU (Transmitter) Receiving ECU Signal Communication Method Main Body ECU Power Management Control ECU Parking brake switch signal CAN Power Management Control ECU Hybrid Vehicle Control ECU Auto park (P) request signal CAN Main Body ECU Transmission Control ECU Assembly IG switch signal ACC switch signal CAN Transmission Control ECU Assembly Hybrid Vehicle Control ECU Park (P) state signal Transmission control ECU assembly trouble condition signal SIL Transmission Control ECU Assembly Power Management Control ECU Park (P) state signal CAN, SIL Transmission control ECU assembly trouble condition signal CAN Hybrid Vehicle Control ECU Power Management Control ECU Auto park (P) complete signal CAN Transmission Control ECU Assembly Combination Meter Park (P) state signal Other than park (P) state signal Transmission control ECU assembly trouble condition signal CAN Hybrid Vehicle Control ECU Combination Meter Shift position signal Hybrid vehicle control ECU trouble signal CAN Transmission Control ECU Assembly Certification ECU Lock/unlock state signal LIN
- FUNCTION OF EACH COMPONENT Part Name Function Shift Control Actuator Composed of the parking lock motor and the rotation angle sensor. The motor is activated by electric current from the transmission control ECU assembly. Motor rotation is reduced by the cycloid reduction mechanism in the shift control actuator and then output. The rotation angle sensor detects the motor rotation angle with the 2 Hall ICs. Transmission Control ECU Assembly The transmission control ECU assembly activates the shift control actuator based on signals from the hybrid vehicle control ECU. The transmission control ECU assembly controls the application timing of current to the parking lock motor based on signals from the rotation angle sensor. Parking Lock Mechanism The parking lock pawl rotates according to the movement of the parking lock rod when the parking lock motor rotates, and engages with the parking gear on the transaxle side, causing the parking lock mechanism to lock or unlock. Hybrid Vehicle Control ECU The hybrid vehicle control ECU sends a P lock or P unlock demand signal to the transmission control ECU assembly based on information from the shift lever and the P position switch (transmission shift main switch). Power Management Control ECU The power management control ECU sends a signal with power off information to the hybrid vehicle control ECU. The hybrid vehicle control ECU then sends the signal to the power management control ECU. P Position Switch Indicator Light The P position switch indicator light comes on/goes off to indicate the P lock/unlock status and blinks to indicate a malfunction in the electronic shift lever system. Combination Meter A malfunction in the transmission control ECU assembly is indicated by the illumination of the master warning light on the combination meter.
- OPERATION DESCRIPTION Operation when switching to park (P): When the P position switch (transmission shift main switch) is pushed to activate the parking lock, a signal is sent to the hybrid vehicle control ECU. The hybrid vehicle control ECU determines whether "P lock" is possible or not based on this signal and other vehicle information. If the hybrid vehicle control ECU determines that "P lock" is possible, it sends a "P lock" operation demand signal to the transmission control ECU assembly. After receiving the signal, the transmission control ECU assembly activates the shift control actuator in order to lock the parking lock mechanism. The transmission control ECU assembly controls motor rotation angle based on signals from the rotation angle sensor in the shift control actuator. HINT: In the cycloid reduction mechanism, the output shaft is linked to the external gear. Together, they rotate only a single tooth when the eccentric adapter, which is linked to the motor, rotates once. Driving force is increased in this way so that the parking lock mechanism can be switched even when high output is required for parking on a hill, etc. The P position switch indicator light is turned on. Operation to switch from park (P) to a shift state other than park (P): When the hybrid system is started (the vehicle is ready to be driven) and the shift lever is moved to R, N, or D with the brake pedal depressed, a signal is sent to the hybrid vehicle control ECU. This signal is then sent from the hybrid vehicle control ECU to the transmission control ECU assembly as a "P lock release" operation demand signal. After receiving the signal, the transmission control ECU assembly activates the shift control actuator in order to unlock the parking lock mechanism. The transmission control ECU assembly controls motor rotation angle based on signals from the rotation angle sensor in the shift control actuator. The P position switch indicator light is turned off.
- SHIFT STATE CHANGE FUNCTION The electronic shift lever system comprehensively determines vehicle conditions and changes the shift state, as shown in the following chart, by cooperating with the shift control function of the hybrid system (except when the reject function described later is in operation). Other than indicated in the following chart, when the power switch is turned off with the vehicle stopped, the shift state is automatically changed to park (P) and all power is turned off.
- REJECT FUNCTION In the electronic shift lever system, there may be a situation in which a shift state change cannot be done for safety reasons. When attempting to move the shift lever in such a situation, the system sounds a reject buzzer inside the meter and changes the shift state as shown in the following table. Shift operation which causes reject function to operate Shift state after rejection The shift lever is moved to any position with park (P) selected and the brake pedal not depressed. Remains park (P) The P position switch (transmission shift main switch) is pushed while driving. Changes to neutral (N) The shift lever is moved to R with drive (D) selected, or D with reverse (R) selected while driving at 12 km/h (7 mph) or more. Changes to neutral (N) The shift lever is moved to B with a shift state other than drive (D) or park (P) selected. Changes to neutral (N) The shift lever is moved to B with park (P) selected and the brake pedal depressed. Remains park (P)
- P POSITION SWITCH INDICATOR LIGHT CONTROL The indicator light comes on when park (P) is engaged, goes off when park (P) is disengaged and blinks when a system malfunction occurs. INDICATOR LIGHT DTC No. Indicator Light Suspected Cause C2300 Blinks Initial drive shift count malfunction Move shift range malfunction Feedbacks shift count malfunction Parking lock position memory malfunction Parking lock moving range memory malfunction C2301 Blinks Shift changing time malfunction C2303 Normal (Comes on when park (P) is engaged and goes off when it is disengaged) No. 2 integration relay lockup C2304 Blinks Open or short in shift control actuator assembly [parking lock motor (MUA)] signal circuit C2305 Blinks Open or short in shift control actuator assembly [parking lock motor (MVA)] signal circuit C2306 Blinks Open or short in shift control actuator assembly [parking lock motor (MWA)] signal circuit C2307 Blinks Power source circuit malfunction C2308 Normal (Comes on when park (P) is engaged, and goes off when it is disengaged) Transmission control ECU assembly internal error C2309 Blinks Open in +B signal circuit C2310 Normal (Comes on when park (P) is engaged, and goes off when it is disengaged) Open or short in BATT signal circuit C2311 Blinks PCON DUTY malfunction Open or short in PCON signal circuit C2315 Normal (Comes on when park (P) is engaged, and goes off when it is disengaged) Open or short in PCOS signal circuit P position switch circuit malfunction U0146 Normal (Comes on when park (P) is engaged, and goes off when it is disengaged) CAN communication system malfunction NOTE: Even if the system has returned to normal, the indicator light does not return to normal without the shift lever being moved from the home position to select a state other than park (P). (Normal refers to the indicator light coming on when park (P) is engaged and going off when park (P) is disengaged.)
FREEZE FRAME DATA
- CHECK FREEZE FRAME DATA HINT: The transmission control ECU records vehicle and driving condition information as freeze frame data the moment a DTC is stored. Freeze frame data can help determine the vehicle conditions when the malfunction occurred and help duplicate conditions when troubleshooting. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Chassis / Transmission Control / Trouble Codes. Select a DTC in order to display its freeze frame data.
- LIST OF FREEZE FRAME DATA Tester Display Measurement Item Reference Value Shift Pos Display (P) Shift position display (P) ON / OFF Shift Pos Display (Not P) Shift position display (not P) ON / OFF Master Caution Display Master caution display Disp / Nondisp PSW Indicator Mode PSW indicator mode OFF / ON / Blink U Phase Voltage Value U phase voltage value 0 to 39 V V Phase Voltage Value V phase voltage value 0 to 39 V W Phase Voltage Value W phase voltage value 0 to 39 V Battery Voltage Value BATT voltage value 0 to 19 V IG(+B) Voltage Value IG (+B) voltage value 0 to 19 V Cmplte of Learn Lck Pos Completion of learning lock position OK / NG Cmplte of Learn Unlck Pos Completion of learning unlock position OK / NG # of Trip Cuntr after Learn Number of trip counter after learning 0 to 65535 Main Relay for Motor Drive No. 2 integration relay for motor drive ON / OFF U Phase Crnt-Carry Status U phase current-carrying status ON / OFF V Phase Crnt-Carry Status V phase current-carrying status ON / OFF W Phase Crnt-Carry Status W phase current-carrying status ON / OFF U Phase Voltage Status U phase voltage status ON / OFF V Phase Voltage Status V phase voltage status ON / OFF W Phase Voltage Status W phase voltage status ON / OFF Battery Voltage Status BATT voltage status ON / OFF IG(+B) Phase Vol Status IG (+B) phase voltage status ON / OFF ACC Condition Signal ACC condition signal ON / OFF Init Drv Cntrl Completed Initial drive control completed OK / NG Cmplte of Detct Lck Pos Completion of detecting lock position OK / NG Cmplte of Detct Unlck Pos Completion of detecting unlock position OK / NG P/Not P Move Shft Range P/Not P movable shift range Set / Unset Main Relay No. 2 integration relay Normal / Abnoml Current flag record Current flag record ON / OFF Fail Rank Fail rank 0 to 255 Detail Information #
FAIL-SAFE CHART
If the transmission control ECU detects a malfunction, the fail-safe functions shown in the table below are activated.
| DTC No. | Fail-safe Function | Problem Symptoms |
|---|---|---|
| C2300 C2301 | Only the park (P) release operation is possible and the shift control actuator is activated. | The shift state (P, R, N, D or B) is not indicated on the meter. Although the shift state (P, R, N, D or B) is indicated on the meter, the vehicle cannot be driven. |
| C2303 | The battery is dead. | |
| C2304 C2305 C2306 | The No. 2 integration relay is turned off. | The parking lock mechanism cannot be switched. |
| C2307 | The No. 2 integration relay is turned off. | The shift state (P, R, N, D or B) is not indicated on the meter. Although the shift state (P, R, N, D or B) is indicated on the meter, the vehicle cannot be driven. |
| C2308 | The parking lock mechanism cannot be switched. The key reminder buzzer sounds constantly. | |
| C2309 | The No. 2 integration relay is turned off. | The parking lock mechanism cannot be switched. |
| C2311 | The parking lock mechanism cannot be switched. |