Smart Access System (Keyless Start) (Diagnostic Codes & Symptom Tests): Diagnosis Lexus CT I

INSPECTION PROCEDURE

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / Trouble Codes. for Smart Access: Body Electrical / Smart Access / Trouble Codes. The smart access system with push-button start uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Inspect the fuses for circuits related to this system before performing the following inspection procedure. After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

Scheme 31

Scheme 32

Scheme 33

1. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) Disconnect the H3 and H4 connectors from the power management control ECU. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition H3-1 (AM22) - Body ground Always 9.5 to 16 V H4-7 (AM21) - Body ground Always 9.5 to 16 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H3-5 (E01) - Body ground Always Below 1 ohms H3-6 (E1) - Body ground Always Below 1 ohms H4-4 (E12) - Body ground Always Below 1 ohms H4-5 (E02) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. INSPECT NO. 2 INTEGRATION RELAY (IG2 RELAY) Remove the No. 2 integration relay. Refer to «REMOVAL»(ref-568740-S34448099602013072300000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1A-2 - 1A-3 20°C (68°F) 130 to 230 ohms TEXT IN ILLUSTRATION *a Component without harness connected (No. 2 Integration Relay) NG --> See step 10 OK: Go to next step
4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG1 NO. 1, IG1 NO. 2 AND IG1 NO. 3 RELAYS) Remove the instrument panel junction block assembly. Refer to «REMOVAL»(ref-568756-S16773882952013072300000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2B-25 - 2B-4 20°C (68°F) 52.32 to 79.32 ohms 2B-25 - 2B-6 20°C (68°F) 52.32 to 79.32 ohms 2B-4 - 2B-6 Always Below 1 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Instrument Panel Junction Block Assembly) NG --> See step 11 OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - INSTRUMENT PANEL JUNCTION BLOCK) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H4-2 (IG1D) - 2B-25 Always Below 1 ohms H4-2 (IG1D) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BODY GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2B-4 - Body ground Always Below 1 ohms 2B-6 - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
7. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - IG2 RELAY) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A20-2 (IG2D) - 1A-2 Always Below 1 ohms A20-2 (IG2D) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
8. CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK ASSEMBLY - BODY GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1A-3 - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
9. CHECK POWER MANAGEMENT CONTROL ECU Install the instrument panel junction block assembly. Install the No. 2 integration relay. Reconnect the A20 and H4 connectors. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A20-2 (IG2D) - Body ground Power switch on (IG) Output voltage at terminal AM21 or AM22 is -2.5 V or more H4-2 (IG1D) - Body ground Power switch on (IG) Output voltage at terminal AM21 or AM22 is -2.5 V or more TEXT IN ILLUSTRATION *a Component with harness connected (Power Management Control ECU) NG --> See step 12 OK --> See step 13
10. REPLACE NO. 2 INTEGRATION RELAY. Refer to «REMOVAL»(ref-568740-S34448099602013072300000)
11. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL»(ref-568756-S16773882952013072300000)
12. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-568756-S19873439732013072300000)
13. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-568589-S05901111982013072300000)

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / Trouble Codes. for Smart Access: Body Electrical / Smart Access / Trouble Codes. The smart access system with push-button start uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Inspect the fuses for circuits related to this system before performing the following inspection procedure. When the power source mode cannot change to on (ACC), the audio and navigation systems do not operate. After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

Scheme 34

Scheme 35

1. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Remove the instrument panel junction block assembly. Refer to «REMOVAL»(ref-568756-S16773882952013072300000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2A-43 - 2B-4 20°C (68°F) 81.49 to 118.98 ohms 2A-43 - 2B-6 20°C (68°F) 81.49 to 118.98 ohms 2B-4 - 2B-6 Always Below 1 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Instrument Panel Junction Block Assembly) NG --> See step 7 OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - INSTRUMENT PANEL J/B) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H4-1 (ACCD) - 2A-43 Always Below 1 ohms H4-1 (ACCD) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BODY GROUND) Measure the resistance according to the value(s) the table below. Standard Resistance Tester Connection Condition Specified Condition 2B-4 - Body ground Always Below 1 ohms 2B-6 - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. INSPECT POWER MANAGEMENT CONTROL ECU Reinstall the instrument panel junction block assembly. Reconnect the H3 and H4 connectors. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition H4-1 (ACCD) - Body ground Power switch on (ACC) Output voltage at terminal AM21 or AM22 is -2.5 V or more TEXT IN ILLUSTRATION *a Component with harness connected (Power Management Control ECU) NG --> See step 8 OK --> See step 9
7. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL»(ref-568756-S16773882952013072300000)
8. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-568756-S19873439732013072300000)
9. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-568589-S05901111982013072300000)

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / Trouble Codes. for Smart Access: Body Electrical / Smart Access / Trouble Codes. The smart access system with push-button start uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Inspect the fuses for circuits related to this system before performing the following inspection procedure. After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / Trouble Codes. for Smart Access: Body Electrical / Smart Access / Trouble Codes. The smart access system with push-button start uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

HINT

Before proceeding with troubleshooting, check if there are any signs of water damage to the power management control ECU. If there are any signs of water damage, replace the power management control ECU and take measures against the cause of the water damage.

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / Trouble Codes. for Smart Access: Body Electrical / Smart Access / Trouble Codes. The smart access system with push-button start uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Inspect the fuses for circuits related to this system before performing the following inspection procedure. After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

Scheme 36

1. CHECK CAN COMMUNICATION SYSTEM Check if CAN communication DTCs are output. HINT: If any DTCs for the CAN communication system are output, inspect those DTCs first. OK CAN communication DTC is not output. NG --> See step 10 OK: Go to next step
2. CHECK SPEEDOMETER OPERATION Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Combination Meter / Data List. Check the Data List for proper functioning of the vehicle speed signal. COMBINATION METER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Vehicle Speed Meter Vehicle speed/Min.: 0, Max.: 255 Almost same as actual speed (When driving) - OK Vehicle speed displayed on the Techstream is almost the same as the actual vehicle speed measured using a speedometer tester (calibrated chassis dynamometer). NG --> See step 11 OK: Go to next step
3. READ VALUE USING TECHSTREAM Enter the following menus: Body Electrical / Power Source Control / Data List. Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Vehicle speed signal Vehicle speed signal/Stop or Run Stop: Vehicle stopped Run: Vehicle running - OK Stop (vehicle is stopped) and Run (vehicle is running) appear on the screen. NG --> See step 4 OK --> See step 12
4. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - POWER MANAGEMENT CONTROL ECU) Disconnect the H19 connector from the combination meter assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H3-14 (SPDI) - H19-40 (+S) Always Below 1 ohms H3-14 (SPDI) - Body ground Always 10 kohms or higher NG --> See step 8 OK: Go to next step
7. INSPECT COMBINATION METER ASSEMBLY Remove the combination meter. Refer to «REMOVAL»(ref-568747-S11946107832013072300000) . Reconnect the H19 connector to the combination meter assembly. Reconnect the H3 connector to the power management control ECU. Connect an oscilloscope to terminal H19-40 (+S) and body ground. Turn the power switch on (IG). Turn a wheel slowly. Check the signal waveform according to the condition(s) in the table below. Item Condition Tool setting 5 V/DIV., 20 ms./DIV. Vehicle condition Wheel being turned OK The waveform is similar to that shown in the illustration. TEXT IN ILLUSTRATION *a Component with harness connected (Combination Meter Assembly) HINT: When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows. NG --> See step 13 OK --> See step 14
8. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - JUNCTION CONNECTOR) Disconnect the H117 connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H19-40 (+S) - H117-59 Always Below 1 ohms H19-40 (+S) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
9. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - JUNCTION BLOCK) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H3-14 (SPDI) - H117-29 Always Below 1 ohms H3-14 (SPDI) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE JUNCTION CONNECTOR
10. GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART). Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-568746-S16364510032013072300000)
11. GO TO METER / GAUGE SYSTEM (Speedometer Malfunction). Refer to «Speedometer Malfunction»(ref-568762-S14054919862013072300000)
12. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-568756-S19873439732013072300000)
13. GO TO METER / GAUGE SYSTEM (Speed Signal Circuit). Refer to «Speed Signal Circuit»(ref-568762-S10347095632013072300000)
14. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-568756-S19873439732013072300000)

HINT

Check the connector connection to the terminal to make sure that there is no abnormality such as a loose connection, deformation, etc.

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / Trouble Codes. for Smart Access: Body Electrical / Smart Access / Trouble Codes. The smart access system with push-button start uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Inspect the fuses for circuits related to this system before performing the following inspection procedure. After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

Scheme 37

1. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. INSPECT STOP LIGHT SWITCH ASSEMBLY Remove the stop light switch assembly. Refer to «REMOVAL»(ref-568776-S39081150282013072300000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 Pushed 10 kohms or higher 3 - 4 Pushed Below 1 ohms 1 - 2 Not pushed Below 1 ohms 3 - 4 Not pushed 10 kohms or higher TEXT IN ILLUSTRATION *a Component without harness connected (Stop Light Switch Assembly) *b Free *c Pushed in NG --> See step 6 OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - POWER MANAGEMENT CONTROL ECU) Disconnect the A20 connector from the power management control ECU. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A20-23 (STP) - A25-1 Always Below 1 ohms A20-23 (STP) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH ASSEMBLY) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Power Source Control / Data List. Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Specified Condition Stop Light Switch1 Stop light switch1/ON or OFF ON: Brake pedal depressed OFF: Brake pedal released - OK ON (brake pedal is depressed) and OFF (brake pedal is released) appear on the screen. NG --> See step 7 OK --> See step 8
6. REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-568776-S39081150282013072300000)
7. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-568756-S19873439732013072300000)
8. GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM (DTC C1249/49). Refer to «DTC C1249/49: Open in Stop Light Switch Circuit»(ref-568779-S08658980082013072300000)

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / Trouble Codes. for Smart Access: Body Electrical / Smart Access / Trouble Codes. The smart access system with push-button start uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Inspect the fuses for circuits related to this system before performing the following inspection procedure. After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

HINT

Check the connector connection to the terminal to make sure that there is no abnormality such as a loose connection, deformation, etc.

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / Trouble Codes. for Smart Access: Body Electrical / Smart Access / Trouble Codes. The smart access system with push-button start uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Inspect the fuses for circuits related to this system before performing the following inspection procedure. After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / Trouble Codes. for Smart Access: Body Electrical / Smart Access / Trouble Codes. Make sure that no DTCs are output. If any DTCs are output, proceed to the Diagnostic Trouble Code Chart. Refer to DTC CHECK / CLEAR . The smart access system with push-button start uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . If the smart access system with push-button start is disabled through the customize function, enable the system before performing troubleshooting. Refer to CUSTOMIZE PARAMETERS . Inspect the fuses for circuits related to this system before performing the following inspection procedure. After completing repairs, confirm that the problem does not occur.

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

Scheme 38

1. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. READ VALUE USING TECHSTREAM Reconnect the H3 and H4 connectors to the power management control ECU. 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: Body Electrical / Power Source Control / Data List. Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Key Certif Wait T-Out Key certification error detection/ No or Yes No: Key certification error not detected Yes: Key certification error detected - OK When more than 1 second elapses after the power switch is turned from off to on (IG), No is displayed in the Data List. NG --> See step 9 OK: Go to next step
4. READ VALUE USING TECHSTREAM Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Start Switch1 Start switch 1/ON or OFF ON: Power switch pushed OFF: Power switch not pushed - Start Switch2 Start switch 2/ON or OFF ON: Power switch pushed OFF: Power switch not pushed - OK ON (power switch is pushed) and OFF (power switch is not pushed) appear on the screen. NG --> See step 7 OK: Go to next step
5. CHECK POWER MANAGEMENT CONTROL ECU Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Power Supply Condition Power supply condition/All OFF, ACC ON, IG1 ON, IG2 ON, ST ON ALL OFF: All relays off ACC ON: ACC relay on IG1 ON: IG1 relay on IG2 ON: IG2 relay on ST ON: ST request signal on - Measure the voltage while checking the Data List on the Techstream. Standard Voltage Tester Connection Condition Specified Condition H4-2 (IG1D) - Body ground Power switch off Below 1 V H4-2 (IG1D) - Body ground Power switch on (ACC) Below 1 V H4-2 (IG1D) - Body ground Power switch on (IG) Output voltage at terminal AM21 or AM22 is -2.5 V or more A20-2 (IG2D) - Body ground Power switch off Below 1 V A20-2 (IG2D) - Body ground Power switch on (ACC) Below 1 V A20-2 (IG2D) - Body ground Power switch on (IG) Output voltage at terminal AM21 or AM22 is -2.5 V or more H4-1 (ACCD) - Body ground Power switch off Below 1 V H4-1 (ACCD) - Body ground Power switch on (IG) Output voltage at terminal AM21 or AM22 is -2.5 V or more H4-1 (ACCD) - Body ground Power switch on (ACC) Output voltage at terminal AM21 or AM22 is -2.5 V or more NG --> See step 10 OK: Go to next step
6. CONFIRMATION TEST Check that the power source mode becomes on (ACC) and on (IG) when the power switch is operated. OK Power source mode becomes on (ACC) and on (IG) when the power switch is operated. NG --> CHECK RELAY CONTACT SIDE CIRCUIT OK --> See step 13
7. CHECK POWER SWITCH Remove the power switch. Refer to «REMOVAL»(ref-568773-S22493078982013072300000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H78-7 (SS1) - H78-5 (GND) Pushed Below 1 ohms H78-7 (SS1) - H78-5 (GND) Not pushed 10 kohms or higher H78-2 (SS2) - H78-5 (GND) Pushed Below 1 ohms H78-2 (SS2) - H78-5 (GND) Not pushed 10 kohms or higher TEXT IN ILLUSTRATION *a Component without harness connected (Power Switch) NG --> See step 11 OK: Go to next step
8. CHECK HARNESS AND CONNECTOR (POWER SWITCH - POWER MANAGEMENT CONTROL ECU AND BODY GROUND) Disconnect the H3 and H4 connectors from the power management control ECU. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H4-17 (SSW2) - H78-2 (SS2) Always Below 1 ohms H3-7 (SSW1) - H78-7 (SS1) Always Below 1 ohms H4-17 (SSW2) - Body ground Always 10 kohms or higher H3-7 (SSW1) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 12
9. CHECK FOR DTC Enter the following menus: for Power Source Control: Body Electrical / Power Source Control / Trouble Codes. for Smart Access: Body Electrical / Smart Access / Trouble Codes. Check for DTCs. Result Result Proceed to The following DTCs are not output: B2785 B2287 B2784 A DTC B2785 is not output but DTC B2287 is output. B DTCs other than B2287 are output. C A --> See step 14 B --> See step 15 C --> GO TO DIAGNOSTIC TROUBLE CODE CHART
10. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-568756-S19873439732013072300000)
11. REPLACE POWER SWITCH. Refer to «REMOVAL»(ref-568773-S22493078982013072300000)
12. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-568756-S19873439732013072300000)
13. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-568589-S05901111982013072300000)
14. GO TO OTHER FLOW CHART (Room Oscillator does not Recognize Key). Refer to «Room Oscillator does not Recognize Key»(ref-568831-S28501182772013072300000)
15. GO TO OTHER FLOW CHART (DTC B2287). Refer to «DTC B2287: LIN Communication Master Malfunction»(ref-568821-S28420286522013072300000)

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / Trouble Codes. for Smart Access: Body Electrical / Smart Access / Trouble Codes. Make sure that no DTCs are output. If any DTCs are output, proceed to the Diagnostic Trouble Code Chart. Refer to DIAGNOSTIC TROUBLE CODE CHART . The smart access system with push-button start uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . If the smart access system with push-button start is disabled through the customize function, enable the system before performing troubleshooting. Refer to CUSTOMIZE PARAMETERS . Inspect the fuses for circuits related to this system before performing the following inspection procedure. After completing repairs, confirm that the problem does not occur.

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / Trouble Codes. for Smart Access: Body Electrical / Smart Access / Trouble Codes. Make sure that no DTCs are output. If any DTCs are output, proceed to the Diagnostic Trouble Code Chart. Refer to DIAGNOSTIC TROUBLE CODE CHART . The smart access system with push-button start uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . If the smart access system with push-button start is disabled through the customize function, enable the system before performing troubleshooting. Refer to CUSTOMIZE PARAMETERS . Inspect the fuses for circuits related to this system before performing the following inspection procedure. After completing repairs, confirm that the problem does not occur.

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Hybrid Control: Powertrain / Hybrid Control / Trouble Codes. for Power Source Control: Body Electrical / Power Source Control / Trouble Codes. for Smart Access: Body Electrical / Smart Access / Trouble Codes. The smart access system with push-button start uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . If the smart access system with push-button start is disabled through the customize function, enable the system before performing troubleshooting. Refer to CUSTOMIZE PARAMETERS . Inspect the fuses of circuits related to this system before performing the following inspection procedure. When replacing the certification ECU (smart key ECU assembly) or ID code box, registration must be performed. Refer to REGISTRATION . After completing repairs, confirm that the problem does not occur.

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

Scheme 39

Scheme 40

Scheme 41

1. CHECK HYBRID SYSTEM READY ON Place the electrical key on the driver seat. Depress the brake pedal. Check that the power switch indicator light is green. Then press the power switch to check if the hybrid system turns on (READY). OK Power source mode becomes on (READY). NG --> See step 2 OK --> END (HYBRID SYSTEM PERMISSION CONDITIONS WERE NOT SATISFIED)
2. CHECK FOR DTC 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: Powertrain / Hybrid Control / Trouble Codes. Enter the following menus: Body Electrical / Power Source Control / Trouble Codes. Check for DTCs. Result Result Proceed to DTC is not output A Hybrid control system DTC is output B Smart access system with push-button start (for start function) DTC is output C B --> See step 17 C --> See step 16 A: Go to next step
3. CHECK POWER SOURCE CONDITION Check the power source mode change. When the key is inside the vehicle and the park (P) is selected, check that pressing the power switch causes the power source mode to change. Result Result Proceed to off --> on (ACC) --> on (IG) --> off A Power source mode does not change to on (IG and ACC) B Power source mode does not change to on (IG) C Power source mode does not change to on (ACC) D B --> See step 19 C --> See step 20 D --> See step 21 A: Go to next step
4. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH ASSEMBLY) Read the Data List according to the display on the Techstream. HYBRID CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Stop Light Switch1 Stop light switch 1/ON or OFF ON: Brake pedal depressed OFF: Brake pedal released - OK ON (brake pedal is depressed) and OFF (brake pedal is released) appear on the screen. NG --> See step 10 OK: Go to next step
5. READ VALUE USING TECHSTREAM (L CODE) Enter the following menus: Body Electrical / Smart Access / Data List. Read the Data List according to the display on the Techstream. SMART ACCESS Tester Display Measurement Item/Range Normal Condition Diagnostic Note L Code Check L code certification result/OK or NG OK: L code certification result normal NG: L code certification result abnormal - OK OK appears on the screen. NG --> See step 12 OK: Go to next step
6. READ VALUE USING TECHSTREAM (ENGINE START REQUEST) Read the Data List according to the display on the Techstream. SMART ACCESS Tester Display Measurement Item/Range Normal Condition Diagnostic Note Engine Start Request Start request signal response/OK or NG OK: Start request condition signal received NG: Start request condition signal not received - OK OK appears on the screen. Result Result Proceed to OK A NG B B --> See step 12 A: Go to next step
7. READ VALUE USING TECHSTREAM (S CODE) Read the Data List according to the display on the Techstream. SMART ACCESS Tester Display Measurement Item/Range Normal Condition Diagnostic Note S Code Check S code certification result/OK or NG OK: S code certification result normal NG: S code certification result abnormal - OK OK appears on the screen. NG --> See step 14 OK: Go to next step
8. CHECK ID CODE BOX (IMMOBILIZER CODE ECU) Measure the voltage according to the value(s) in the table below. TEXT IN ILLUSTRATION *a Component with harness connected (Power Management Control ECU) Waveform 1 TEXT IN ILLUSTRATION *a Approximately 160 ms *b Approximately 510 ms MEASUREMENT CONDITION Item Content Tester Connection H4-20 (IMO) - H3-6 (E1) Tool Setting 2 V/DIV., 200 ms./DIV. Condition Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected Waveform 2 TEXT IN ILLUSTRATION *a Approximately 160 ms *b Approximately 510 ms MEASUREMENT CONDITION Item Content Tester Connection H4-21 (IMI) - H3-6 (E1) Tool Setting 2 V/DIV., 200 ms./DIV. Condition Power switch on (IG) OK The waveform is displayed as shown in illustration. NG --> See step 22 OK: Go to next step
9. READ VALUE USING TECHSTREAM Enter the following menus: Body Electrical / Power Source Control / Data List. Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Starter Request Signal Hybrid control system start request signal / ON or OFF ON: STSW signal is on OFF: STSW signal is off - OK Data List display changes when the power switch is operated. NG --> See step 23 OK --> See step 24
10. INSPECT STOP LIGHT SWITCH ASSEMBLY See step 3 NG --> See step 25 OK: Go to next step
11. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY) Disconnect the A20 connector from the power management control ECU. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A20-23 (STP) - A25-1 Always Below 1 ohms A20-23 (STP) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 26
12. REPLACE TRANSMISSION CONTROL ECU ASSEMBLY Replace transmission control ECU assembly. Refer to «REMOVAL»(ref-568724-S20144004162013072300000) . NEXT: Go to next step
13. CHECK HYBRID SYSTEM READY ON Place the electrical key on the driver seat. Depress the brake pedal. Check that the power switch indicator light is green. Then press the power switch to check if the hybrid system turns on (READY). OK Power source mode becomes on (READY). Result Result Proceed to OK A NG B B --> See step 28 A --> END (TRANSMISSION CONTROL ECU WAS DEFECTIVE)
14. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Replace the certification ECU (smart key ECU assembly). Refer to «REMOVAL»(ref-568797-S38879700432013072300000) . NEXT: Go to next step
15. CHECK HYBRID SYSTEM READY ON Place the electrical key on the driver seat. Depress the brake pedal. Check that the power switch indicator light is green. Then press the power switch to check if the hybrid system turns on (READY). OK Power source mode becomes on (READY). NG --> See step 27 OK --> See step 18
16. GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function). Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-568598-S07333014882013072300000)
17. GO TO HYBRID CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART). Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-568739-S34469312312013072300000)
18. END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE). Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-568598-S07333014882013072300000)
19. GO TO OTHER FLOW CHART (Power Source Mode does not Change to ON (IG and ACC)). Refer to «Power Source Mode does not Change to ON (IG and ACC)»(ref-568825-S05882402142013072300000)
20. GO TO OTHER FLOW CHART (Power Source Mode does not Change to ON (IG)). Refer to «Power Source Mode does not Change to ON (IG)»(ref-568825-S07793129152013072300000)
21. GO TO OTHER FLOW CHART (Power Source Mode does not Change to ON (ACC)). Refer to «Power Source Mode does not Change to ON (ACC)»(ref-568825-S22232076262013072300000)
22. REPLACE ID CODE BOX (IMMOBILIZER CODE ECU). Refer to «REMOVAL»(ref-568797-S34163913932013072300000)
23. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-568756-S19873439732013072300000)
24. GO TO HYBRID CONTROL SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-568739-S08567487372013072300000)
25. REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-568776-S39081150282013072300000)
26. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-568756-S19873439732013072300000)
27. REPLACE ID CODE BOX (IMMOBILIZER CODE ECU). Refer to «REMOVAL»(ref-568797-S34163913932013072300000)
28. REPLACE ID CODE BOX (IMMOBILIZER CODE ECU). Refer to «REMOVAL»(ref-568797-S34163913932013072300000)