Electronic A/t Shift Lever System (Diagnostics - Introduction): Diagnosis Lexus CT I

HOW TO PROCEED WITH TROUBLESHOOTING

HINT

*: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
2. CUSTOMER PROBLEM ANALYSIS NEXT: Go to next step
3. CONNECT TECHSTREAM TO THE DLC3* HINT: If the display on the Techstream indicates a communication fault, inspect the DLC3. NEXT: Go to next step
4. CHECK DTC AND SAVE FREEZE FRAME DATA*. Refer to «DTC CHECK / CLEAR»(ref-568757-S22639110152013072300000) . Refer to «FREEZE FRAME DATA»(ref-568757-S36272072242013072300000) HINT: Make sure to save freeze frame data because the data is necessary for a simulation test. NEXT: Go to next step
5. CLEAR DTC AND FREEZE FRAME DATA*. Refer to «DTC CHECK / CLEAR»(ref-568757-S22639110152013072300000) NEXT: Go to next step
6. CONDUCT VISUAL INSPECTION NEXT: Go to next step
7. CONFIRM PROBLEM SYMPTOMS Result Result Proceed to Malfunction does not occur A Malfunction occurs B B --> GO TO STEP 11 A: Go to next step
8. DUPLICATE CONDITIONS THAT PRODUCE SYMPTOMS NEXT: Go to next step
9. CHECK FOR DTCS*. Refer to «DTC CHECK / CLEAR»(ref-568757-S22639110152013072300000) Result Result Proceed to DTC is output A DTC is not output B B --> GO TO STEP 11 A: Go to next step
10. REFER TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-568757-S12800631632013072300000) NEXT --> GO TO STEP 13
11. CONDUCT BASIC INSPECTION Result Result Proceed to Malfunctioning parts not confirmed A Malfunctioning parts confirmed B B --> GO TO STEP 15 A: Go to next step
12. CHECK ECU POWER SOURCE CIRCUIT NEXT: Go to next step
13. CONDUCT CIRCUIT INSPECTION Result Result Proceed to Malfunction not confirmed A Malfunction confirmed B B --> GO TO STEP 16 A: Go to next step
14. CHECK FOR INTERMITTENT PROBLEMS. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-568589-S05901111982013072300000) NEXT --> GO TO STEP 16
15. CONDUCT PARTS INSPECTION NEXT: Go to next step
16. IDENTIFY PROBLEM NEXT: Go to next step
17. ADJUST AND/OR REPAIR NEXT: Go to next step
18. CONDUCT CONFIRMATION TEST NEXT --> END

PROBLEM SYMPTOMS TABLE

HINT

1. Use the table below to help determine the cause of the problem symptoms. If multiple suspected areas are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
2. Inspect the fuses and relays related to this system before inspecting the suspected areas below.

ELECTRONIC SHIFT LEVER SYSTEM

Scheme 200

Scheme 201

Scheme 202

Scheme 203

1. TRANSMISSION CONTROL ECU INSPECTION HINT: Inspect the connectors from the back while the connector is connected. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A21-1 (MWA) - A22-6 (E01) W - W-B Parking lock motor Engine stopped (hybrid system stopped), power switch on (IG) 9 to 14 V A21-2 (MVA) - A22-6 (E01) R - W-B Parking lock motor Engine stopped (hybrid system stopped), power switch on (IG) 9 to 14 V A21-5 (MUA) - A22-6 (E01) B - W-B Parking lock motor Engine stopped (hybrid system stopped), power switch on (IG) 9 to 14 V A21-7 (VC) - A21-19 (E2) G - P Power source (Rotation angle sensor) Engine stopped (hybrid system stopped), power switch on (IG) 4.5 to 5.5 V A21-8 (RB) - A21-19 (E2) GR - P Rotation angle sensor signal Power switch off --> Power switch on (IG) 0 to 1.5 V <----> 4 to 5.5 V Power switch on (IG) Changing from park (P) to neutral (N), or neutral (N) to park (P). Pulse generation (see waveform 1 in a ) A21-15 (BATT) - A22-1 (E1) SB - BR Power source (RAM) Always 9 to 14 V A21-16 (+B) - A22-1 (E1) GR - BR Power source Engine stopped (hybrid system stopped), power switch on (IG) 9 to 14 V A21-17 (RA) - A21-19 (E2) LG - P Rotation angle sensor signal Power switch off --> Power switch on (IG) 0 to 1.5 V <----> 4 to 5.5 V Power switch on (IG) Changing from park (P) to neutral (N), or neutral (N) to park (P). Pulse generation (see waveform 1 in a ) A21-19 (E2) - Body ground P - Body ground Rotation angle sensor ground Always Below 1 ohms A21-20 (IND) - A22-1 (E1) R - BR P position switch indicator light Park (P) not selected --> Park (P) selected [P position switch (transmission shift main switch) pushed to select park (P)] 9 to 14 V --> 0 to 1.5 V A21-23 (BMA) - A22-1 (E1) B - BR P CON MTR relay (transaxle parking lock control relay) Engine stopped (hybrid system stopped), power switch on (IG) 9 to 14 V A22-1 (E1) - Body ground BR - Body ground Ground Always Below 1 ohms A22-5 (E02) - Body ground W-B - Body ground Ground Always Below 1 ohms A22-6 (E01) - Body ground W-B - Body ground Ground Always Below 1 ohms A22-15 (CA1L) - A22-1 (E1) BR - BR CAN communication Power switch on (IG) Pulse generation (see waveform 2 in b ) A22-16 (CA1H) - A22-1 (E1) Y - BR CAN communication Power switch on (IG) Pulse generation (see waveform 2 in b ) A22-22 (PCON) - A22-1 (E1) LG - BR Communication bus Engine stopped (hybrid system stopped), power switch on (IG) Pulse generation (see waveform 3 in c ) A22-23 (PPOS) - A22-1 (E1) V - BR Communication bus Engine stopped (hybrid system stopped), power switch on (IG) Pulse generation (see waveform 3 in c ) A22-24 (LIN) B LIN communication
2. Oscilloscope waveforms HINT: Oscilloscope waveform samples are provided here for informational purposes. Noise and fluttering waveforms have been omitted. Waveform 1 (Rotation angle sensor signal) Item Contents Terminal A21-17 (RA) - A21-19 (E2) A21-8 (RB) - A21-19 (E2) Equipment setting 2 V/DIV., 100 msec./DIV. Condition Power switch on (IG) Changing from park (P) to neutral (N), or neutral (N) to park (P). HINT: When changing from park (P) to neutral (N), or neutral (N) to park (P) with the power switch on (IG), a waveform will be generated for up to 0.5 seconds. The waveform shown is for reference only. Waveform 2 (CAN communication signal) Item Contents Terminal CH1: A22-16 (CA1H) - A22-1 (E1) CH2: A22-15 (CA1L) - A22-1 (E1) Equipment setting 1 V/DIV., 50 μs/DIV. Condition Power switch on (IG) Waveform 3 (Transmission control communication signal) Item Contents Terminal CH1: A22-22 (PCON) - A22-1 (E1) CH2: A22-23 (PPOS) - A22-1 (E1) Equipment setting 10 V/DIV., 10 ms/DIV. Condition Engine stopped (hybrid system stopped), power switch on (IG)

DTC CHECK / CLEAR

1. CHECK FOR DTCS (Using the Techstream) 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. Check for DTCs and freeze frame data, and then write them down. Check the details of the DTCs.
2. CHECK FOR DTCS (Systems other than the transmission control ECU assembly) HINT: The transmission control ECU assembly maintains communication with other ECUs, including the power management control ECU. Therefore, if the transmission control ECU assembly outputs a warning, it is necessary to check and record the DTCs of all systems. If DTCs are present, check the relevant systems. HINT: If DTCs for the CAN communication system are present in addition to other DTCs, first troubleshoot and repair any malfunctions in the CAN communication system.
3. CLEAR DTCS (Using the Techstream) 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. Clear the DTCs and freeze frame data. NOTE: It may not be possible to clear the following DTCs using the Techstream: 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). In such cases, disconnect the P CON MAIN fuse and wait for at least 60 seconds to clear the DTCs after the repair. Clearing the DTCs will also clear the freeze frame data.
4. CLEAR DTCS (Without using the Techstream) Turn the power switch off. Remove the P CON MAIN fuse from the engine room junction block assembly located inside the engine compartment for more than 60 seconds. Check for DTCs again to see if the DTCs are cleared. NOTE: If DTCs are output, repair the parts by following the diagnostic trouble code chart. Clearing the DTCs will also clear the freeze frame data.

DATA LIST / ACTIVE TEST

1. DATA LIST NOTE: Some Data List values may vary significantly if there are slight differences in the environment in which the vehicle is operating when measurements are obtained. Variations may also occur due to aging of the vehicle. Due to these considerations, it is not always possible to provide definite values to be used for judgment of malfunctions. It is possible that a malfunction may be present even if measured values are within the reference range. In the event of a problem with intricate symptoms, collect sample data from another vehicle of the same model operating under identical conditions in order to reach an overall judgment by comparing all the items in the Data List. HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time. NOTE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not. Warm up the engine. Turn the power switch off. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Chassis / Transmission Control / Data List. According to the display on the Techstream, read the Data List. HINT: When reading the Data List information, first determine which items need to be monitored before proceeding. Attempting to view all of the data may result in a delayed, inaccurate inspection. TRANSMISSION CONTROL ECU Tester Display Measurement Item/Range Normal Condition Diagnostic Note Shift Pos Display (P) Shift position display (P) / ON or OFF ON: Park (P) selected OFF: A shift state other than park (P) selected - Shift Pos Display (Not P) Shift position display (not P) / ON or OFF ON: A shift state other than park (P) selected OFF: Park (P) selected - Master Caution Display Master caution display / Disp or Nondisp Disp: Malfunction occurs in this system Nondisp: Malfunction does not occur in this system Transmission control ECU assembly PSW Indicator Mode PSW indicator mode / ON or OFF ON: Park (P) selected OFF: A shift state other than park (P) selected (When normal) (May go off during malfunction) - U Phase Voltage Value U phase voltage value / Min: 0 V, Max: 39 V 9 to 14 V: On (IG) (If voltage is applied to the shift control actuator assembly: 0 V) Shift control actuator assembly [parking lock motor (MUA)] signal circuit V Phase Voltage Value V phase voltage value / Min: 0 V, Max: 39 V 9 to 14 V: On (IG) (If voltage is applied to the shift control actuator assembly: 0 V) Shift control actuator assembly [parking lock motor(MVA)] signal circuit W Phase Voltage Value W phase voltage value / Min: 0 V, Max: 39 V 9 to 14 V: On (IG) (If voltage is applied to the shift control actuator assembly: 0 V) Shift control actuator assembly [parking lock motor(MWA)] signal circuit Battery Voltage Value BATT voltage value / Min: 0 V, Max: 19 V 8 to 16 V: On (IG) BATT signal circuit IG (+B) Voltage Value IG (+B) voltage value / Min: 0 V, Max: 19 V 8 to 16 V: On (IG) +B signal circuit Cmplte of Learn Lck Pos Completion of learning lock position / OK or NG OK: On (IG) - Cmplte of Learn Unlck Pos Completion of learning unlock position / OK or NG OK: Power switch on (IG), Park (P) selected --> Neutral (N) selected and number of trips after learning is less than 3 or power switch on (IG) and number of trips after learning is 3 or more NG: Power switch on (IG), a shift state other than Park (P) has not been selected and number of trips after learning is less than 3 Learning: Power switch on (IG), Park (P) selected --> Neutral (N) selected Learning will not complete if Neutral (N) has not been selected even if number of trips is 3 or more # of Trip Cuntr after Learn Number of trips after learning / Min: 0, Max: 65535 Actual number of trips (Power switch on (IG)) - Main Relay for Motor Drive P CON MTR relay (transaxle parking lock control relay) for motor drive / ON or OFF ON: On (IG) - U Phase Crnt-Carry Status U phase current-carrying status / ON or OFF ON: U phase current flows OFF: U phase current does not flow Shift control actuator assembly [parking lock motor (MUA)] signal circuit V Phase Crnt-Carry Status V phase current-carrying status / ON or OFF ON: V phase current flows OFF: V phase current does not flow Shift control actuator assembly [parking lock motor (MVA)] signal circuit W Phase Crnt-Carry Status W phase current-carrying status / ON or OFF ON: W phase current flows OFF: W phase current does not flow Shift control actuator assembly [parking lock motor (MWA)] signal circuit U Phase Voltage Status U phase voltage status / ON or OFF ON: 9 to 14 V OFF: 0 V Shift control actuator assembly [parking lock motor (MUA)] signal circuit V Phase Voltage Status V phase voltage status / ON or OFF ON: 9 to 14 V OFF: 0 V Shift control actuator assembly [parking lock motor (MVA)] signal circuit W Phase Voltage Status W phase voltage status / ON or OFF ON: 9 to 14 V OFF: 0 V Shift control actuator assembly [parking lock motor (MWA)] signal circuit Battery Voltage Status BATT voltage status / ON or OFF ON: 8 to 16 V OFF: Below 8 V BATT signal circuit IG (+B) Phase Vol Status IG (+B) phase voltage status / ON or OFF ON: 10 to 16 V OFF: Below 10 V +B signal circuit ACC Condition Signal ACC condition signal / ON or OFF ON: 5 V or higher OFF: Below 5 V Judged according to the ACC signal via CAN communication line Init Drv Cntrl Completed Initial drive control completed / OK or NG OK: On (IG) - Cmplte of Detct Lck Pos Completion of detecting lock position / OK or NG OK: On (IG) - Cmplte of Detct Unlck Pos Completion of detecting unlock position / OK or NG OK: Power switch on (IG), Park (P) selected --> Neutral (N) selected and number of trips after learning is less than 3 NG: Power switch on (IG) and number of trips after learning is 3 or more NG is displayed when P/Not P Move Shft Range is Set and number of trips is 3 or more P/Not P Move Shft Range P/Not P movable shift range / Set or Unset Set: Power switch on (IG), Park (P) selected --> Neutral (N) selected and number of trips after learning is less than 3 or power switch on (IG) and number of trips after learning is 3 or more Unset: Power switch on (IG), a shift state other than Park (P) has not been selected and number of trips after learning is less than 3 - Main Relay P CON MTR relay (transaxle parking lock control relay) / Normal or Abnoml Normal: On (IG) - Current flag record Current flag record ON or OFF ON: Current flag record stored OFF: Current flag record not stored - Number of Diagnosis Code Number of diagnosis codes / Min: 0, Max: 255 Actual number of DTCs

DIAGNOSTIC TROUBLE CODE CHART

If a trouble code is displayed during the DTC check, check the circuit listed for that code in the table below and proceed to the appropriate "see".

HINT

1. It may not be 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). In such cases, disconnect the P CON MAIN fuse and wait for at least 60 seconds to clear the DTCs after the repair.
2. When a DTC is detected, the master warning light comes on and an error message is indicated on the multi-information display.

ELECTRONIC SHIFT LEVER SYSTEM