Smart Key System (Start Function) (Diagnostic Codes & Symptom Tests) (Except Hybrid): Diagnosis Toyota Avalon XX40

INSPECTION PROCEDURE

Note. When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle. The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. Before replacing the certification ECU (smart key ECU assembly), refer to smart key system (for Start Function) Precaution. Refer to PRECAUTION . Inspect the fuses and relays of circuits related to this system before performing the following inspection procedure. After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

Scheme 114

Scheme 115

Scheme 116

1. CHECK HARNESS AND CONNECTOR (POWER SOURCE) Disconnect the A28 certification ECU (smart key ECU assembly) connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A28-2 (+B) - Body ground Always 11 to 14 V TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Certification ECU - Smart Key ECU Assembly) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A28-11 (E) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Certification ECU - Smart Key ECU Assembly) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Reconnect the A28 certification ECU (smart key ECU assembly) connector. TEXT IN ILLUSTRATION *a Component with harness connected (Certification ECU - Smart Key ECU Assembly) - - Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A28-9 (IG2D) - Body ground Engine switch on (ACC) --> Engine switch on (IG) 1 V or less --> 9 V or higher D64-6 (IG1D) - Body ground Engine switch on (ACC) --> Engine switch on (IG) 1 V or less --> 9 V or higher NG --> See step 4 OK --> See step 5
4. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-551870-S09131890672013051500000)
5. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-551669-S19665230182013051500000)

Note. When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle. The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. Before replacing the certification ECU (smart key ECU assembly), refer to smart key system (for Start Function) Precaution. Refer to PRECAUTION . Inspect the fuses of circuits related to this system before performing the following inspection procedure. After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

Scheme 117

Scheme 118

1. CHECK HARNESS AND CONNECTOR (POWER SOURCE) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) Disconnect the D64 certification ECU (smart key ECU assembly) connector. Disconnect the 3B instrument panel junction block assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D64-4 (ACCD) - 3B-23 Always Below 1 ohms 3B-7 - Body ground Always Below 1 ohms D64-4 (ACCD) or 3B-23 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC NO. 1 AND ACC NO. 2 RELAY) Remove the instrument panel junction block assembly. Refer to «REMOVAL»(ref-551868-S36095780392013051500000) TEXT IN ILLUSTRATION *a Component without harness connected (Instrument Panel Junction Block Assembly) - - Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Refer to «REMOVAL»(ref-551868-S36095780392013051500000) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 3E-1 - 3B-37 (ACC NO. 1 relay) 3E-1 - 3A-31 (ACC NO. 2 relay) Battery voltage not applied to terminals 3B-23 and 3B-7 10 kohms or higher Battery voltage applied to terminals 3B-23 and 3B-7 Below 1 ohms NG --> REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OK: Go to next step
5. INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Reconnect the D64 certification ECU (smart key ECU assembly) connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition D64-4 (ACCD) - Body ground Engine switch off --> Engine switch on (ACC) 1 V or less --> 8.5 V or higher TEXT IN ILLUSTRATION *a Component with harness connected (Certification ECU - Smart Key ECU Assembly) NG --> See step 6 OK --> See step 7
6. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-551870-S09131890672013051500000)
7. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-551669-S19665230182013051500000)

Note. When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle. The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. Before replacing the certification ECU (smart key ECU assembly), refer to smart key system (for Start Function) Precaution. Refer to PRECAUTION . After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

HINT

Before proceeding with troubleshooting, check if there are any signs of water damage to the certification ECU (smart key ECU assembly). If there are any signs of water damage, replace the certification ECU (smart key ECU assembly) and take measures against the cause of the water damage.

Note. When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle. The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. Before replacing the certification ECU (smart key ECU assembly), refer to smart key system (for Start Function) Precaution. Refer to PRECAUTION . Inspect the fuses of circuits related to this system before performing the following inspection procedure. After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

Scheme 119

1. READ VALUE USING TECHSTREAM (VEHICLE SPEED METER) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Combination Meter / Data List. Read the Data List according to the display on the Techstream. COMBINATION METER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Vehicle Speed Meter Vehicle speed/Min.: 0, Max.: 255 Almost same as actual vehicle speed (Speedometer tester) - 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 9 OK: Go to next step
2. READ VALUE USING TECHSTREAM (VEHICLE SPEED SIGNAL) 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 being driven or stopped/Stop or Run Stop: Vehicle stopped Run: Vehicle being driven at 5 km/h (3 mph) or more - OK On the Techstream screen, the display changes between Stop and Run as shown in the chart above. NG --> See step 3 OK --> See step 10
3. CHECK HARNESS AND CONNECTOR (POWER SOURCE) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - COMBINATION METER ASSEMBLY) Disconnect the D64 certification ECU (smart key ECU assembly) connector. Disconnect the D9 combination meter assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D64-27 (SPD) - D9-9 (+S) Always Below 1 ohms D64-27 (SPD) or D9-9 (+S) - Body ground Always 10 kohms or higher NG --> See step 7 OK: Go to next step
6. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Reconnect the D64 certification ECU (smart key ECU assembly) connector. TEXT IN ILLUSTRATION *a Component with harness connected (Certification ECU - Smart Key ECU Assembly) - - Reconnect the D9 combination meter assembly connector. Connect an oscilloscope to terminal D64-27 (SPD) and A28-11 (E). Turn the engine switch on (IG). Check the signal waveform according to the condition(s) in the table below. Item Condition Tester Connection D64-27 (SPD) - A28-11 (E) Tool Setting 5 V/DIV., 20 ms./DIV. Condition Engine switch on (IG), vehicle being driven at approx. 5 km/h (3 mph) OK The waveform is similar to that shown in the illustration. 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 11 OK --> See step 12
7. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - NO. 6 JUNCTION CONNECTOR) Disconnect the D100 No. 6 junction connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D9-9 (+S) - D100-1 Always Below 1 ohms D9-9 (+S) or D100-1 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
8. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - NO. 6 JUNCTION CONNECTOR) Disconnect the D100 No. 6 junction connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D64-27 (SPD) - D100-2 Always Below 1 ohms D64-27 (SPD) or D100-2 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE NO. 6 JUNCTION CONNECTOR
9. GO TO METER / GAUGE SYSTEM (Speedometer Malfunction). Refer to «Speedometer Malfunction»(ref-551826-S12999593402013051500000)
10. GO TO METER / GAUGE SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-551681-S11861368482013051500000)
11. GO TO METER / GAUGE SYSTEM (Speed Signal Circuit). Refer to «Speed Signal Circuit»(ref-551826-S14986889302013051500000)
12. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-551870-S09131890672013051500000)

HINT

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

Note. When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle. The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. Before replacing the certification ECU (smart key ECU assembly), refer to smart key system (for Start Function) Precaution. Refer to PRECAUTION . Inspect the fuses of circuits related to this system before performing the following inspection procedure. After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

Scheme 120

1. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH1) Connect the Techstream to the DLC3. Turn the engine 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 State of brake pedal/ON or OFF ON: Brake pedal depressed OFF: Brake pedal released Use this item to determine whether the stop light switch is malfunctioning. The engine cannot be started when this item is OFF. When this item is malfunctioning, the engine can be started by pressing and holding the engine switch for a certain period of time. OK The Techstream display changes correctly in response to the brake pedal operation. NG --> See step 2 OK --> See step 5
2. CHECK HARNESS AND CONNECTOR (POWER SOURCE) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STOP LIGHT SWITCH ASSEMBLY) Disconnect the A22*1 or A23*2 stop light switch assembly connector. Measure the resistance according to the value(s) in the table below. *1: w/ Cruise Control System *2: w/o Cruise Control System Standard Resistance W/O CRUISE CONTROL SYSTEM Tester Connection Condition Specified Condition A28-18 (STP1) - A23-2 (OUT) Always Below 1 ohms A28-18 (STP1) or A23-2 (OUT) - Body ground Always 10 kohms or higher W/ CRUISE CONTROL SYSTEM Tester Connection Condition Specified Condition A28-18 (STP1) - A22-1 (OUT) Always Below 1 ohms A28-18 (STP1) or A22-1 (OUT) - Body ground Always 10 kohms or higher Reconnect the A22*1 or A23*2 stop light switch assembly connector. Measure the voltage according to the value(s) in the table below. *1: w/ Cruise Control System *2: w/o Cruise Control System Standard Voltage Tester Connection Condition Specified Condition A28-18 (STP1) - Body ground Brake pedal released 1 V or less Brake pedal depressed 9 V or higher TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Certification ECU - Smart Key ECU Assembly) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 6
5. GO TO SFI SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-551690-S02902481482013051500000)
6. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-551870-S09131890672013051500000)

Note. When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle. The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. Before replacing the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator assembly), refer to smart key system (for Start Function) Precaution. Refer to PRECAUTION . Inspect the fuses of circuits related to this system before performing the following inspection procedure. After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

Scheme 121

1. CHECK FOR DTC (LIN COMMUNICATION SYSTEM) Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-551874-S04467166392013051500000) . OK LIN communication system DTC B2785 is not output simultaneously. HINT: If the steering cannot be unlocked, the engine switch cannot be turned on (IG) and the engine cannot be started. If LIN communication is not available, the steering cannot be locked or unlocked. NG --> See step 7 OK: Go to next step
2. READ VALUE USING TECHSTREAM (STEERING UNLOCK SWITCH) Connect the Techstream to the DLC3. Turn the engine 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 Steering Unlock Switch State of steering unlock sensor signal output from steering lock actuator assembly/ON or OFF ON: Steering unlocked OFF: Steering locked When the shift lever is in P and the engine switch is off, if any door is opened then closed, the steering is locked. When the electrical key transmitter sub-assembly is in the cabin and the engine switch is turned on (ACC) or on (IG), the steering unlocks. The engine cannot be started when the steering unlock sensor signal is OFF. OK The Techstream display changes correctly in response to the steering lock/unlock operation. Result Result Proceed to Data List display does not change A Data List display changes B B --> See step 9 A: Go to next step
3. CHECK HARNESS AND CONNECTOR (POWER SOURCE) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Positive (+) tester probe --> D17-4 (SLP1) Negative (-) tester probe --> Body ground Steering locked* 10 kohms or higher Steering unlocked* Below 1 ohms HINT: *: If any of the doors are opened then closed with the shift lever in P and the engine switch off, the steering will be locked. If the engine switch is then turned on (ACC) or on (IG), the steering will be unlocked. DTC B2285 may be stored due to a malfunction in the steering lock ECU (steering lock actuator assembly). The steering lock position signal and unlock position signal are sent from the steering lock ECU (steering lock actuator assembly) to the certification ECU (smart key ECU assembly) individually. TEXT IN ILLUSTRATION *a Component with harness connected (Steering Lock ECU - Steering Lock Actuator Assembly) NG --> See step 9 OK: Go to next step
6. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STEERING LOCK ECU - STEERING LOCK ACTUATOR ASSEMBLY) Disconnect the D64 certification ECU (smart key ECU assembly) connector. Disconnect the D17 steering lock ECU (steering lock actuator assembly) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D64-26 (SLP) - D17-4 (SLP1) Always Below 1 ohms D64-26 (SLP) or D17-4 (SLP1) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 8
7. GO TO DTC B2785. Refer to «DTC B2785: Communication Malfunction between ECUs Connected by LIN»(ref-551876-S23649743012013051500000)
8. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-551870-S09131890672013051500000)
9. REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY). Refer to «DISASSEMBLY»(ref-551670-S15501211422013051500000)

Note. When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle. The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. Before replacing the certification ECU (smart key ECU assembly), refer to smart key system (for Start Function) Precaution. Refer to PRECAUTION . Inspect the fuses of circuits related to this system before performing the following inspection procedure. After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

Scheme 122

1. READ VALUE USING TECHSTREAM (ENGINE CONDITION, ENGINE SPEED) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Power Source Control or Starting 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 Engine Condition Engine state/Stop or Run Stop: Engine stopped Run: Engine running - STARTING CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Engine Speed Engine speed/0 to 16383 r/min Fluctuates in accordance with engine speed - OK On the Techstream screen, the display changes as shown in the charts above. Result Result Proceed to NG A OK B B --> See step 6 A: Go to next step
2. CHECK HARNESS AND CONNECTOR (POWER SOURCE) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ECM) Disconnect the A18 ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A28-16 (NE) - A18-22 (NEO) Always Below 1 ohms A28-16 (NE) or A18-22 (NEO) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Reconnect the A28 certification ECU (smart key ECU assembly) connector. Check the engine speed input signal waveform at the terminal of the certification ECU. Standard Frequency Tester Connection Condition Specified Condition A28-16 (NE) - Body ground Engine stopped No pulse generated Engine running Pulse generated (1000 r/min: 200 Hz) TEXT IN ILLUSTRATION *a Component with harness connected (Certification ECU - Smart Key ECU Assembly) NG --> See step 6 OK --> See step 7
6. GO TO SFI SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-551690-S02902481482013051500000)
7. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-551870-S09131890672013051500000)

Note. When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle. After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

Note. When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle. The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. If the smart key system (for Start Function) is disabled through the customize function, enable the system before performing troubleshooting. Refer to CUSTOMIZE PARAMETERS . Before replacing the certification ECU (smart key ECU assembly), steering lock ECU (steering lock actuator assembly) or ECM, refer to smart key system (for Start Function) Precaution. Refer to PRECAUTION . Inspect the fuses of circuits related to this system before performing the following inspection procedure. If the steering lock ECU (steering lock actuator assembly) is replaced, be sure to confirm that the steering can be unlocked by turning the steering wheel to the left and right before starting the engine. If the steering is locked for any reason, open and close a door with the engine switch off, and then unlock the steering by pressing the engine switch. This prevents the engine from starting while the steering is locked. After completing repairs, confirm that the problem does not recur.

HINT

1. When the certification ECU (smart key ECU assembly) is replaced with a new one and the cable is connected to the negative (-) battery terminal, the power source mode changes to on (IG).
2. When the battery cable is disconnected and reconnected, the power source returns to the mode it was in before the battery cable was disconnected.

RELATED DATA LIST AND ACTIVE TEST ITEMS

HINT

If the brake pedal is repeatedly depressed while the engine is stopped, the brake booster pressure is released and the force required to depress the brake pedal to illuminate the stop lights increases.

Scheme 123

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Scheme 125

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Scheme 127

Scheme 128

1. CHECK BATTERY Measure the battery voltage. Standard Voltage 11 to 14 V HINT: It may be possible to tell whether the vehicle battery is discharged by operating the horn. If the battery voltage is less than 11 V, recharge or replace it. OK: Go to next step
2. CHECK FOR DTC Using the Techstream, check for DTCs. OK No DTCs are output. NOTE: Make sure that no DTCs are output. If any DTCs are output, proceed to Diagnostic Trouble Code Chart. See «DIAGNOSTIC TROUBLE CODE CHART»(ref-551677-S23252079492013051500000) . NG --> GO TO DTC CHART. See «DIAGNOSTIC TROUBLE CODE CHART»(ref-551677-S23252079492013051500000) OK: Go to next step
3. CHECK WAVE ENVIRONMENT If the problem occurs in certain locations or times of day, the possibility of wave interference is high. HINT: Whether the engine does not start is due to wave interference can be checked by holding the electrical key transmitter sub-assembly near the door control and tire pressure monitoring system receiver assembly. Result Result Proceed to Entry function does not operate normally. A Entry function operates normally. B B --> AFFECTED BY WAVE INTERFERENCE A: Go to next step
4. CHECK ENGINE SWITCH CONDITION Get into the vehicle while carrying an electrical key transmitter sub-assembly. Move the shift lever to P. With the brake pedal released, check that pressing the engine 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 (ACC) or on (IG) B Power source mode changes to on (IG) but not to on (ACC) C Power source mode changes to on (ACC) but not to on (IG) D B --> See step 28 C --> See step 29 D --> See step 30 A: Go to next step
5. CHECK CRANKING FUNCTION Get into the vehicle while carrying an electrical key transmitter sub-assembly. Move the shift lever to P. Depress the brake pedal. Confirm that the smart warning light is displayed, and then press the engine switch and check that the engine cranks. OK Engine cranks. Result Result Proceed to NG A OK B B --> See step 26 A: Go to next step
6. CHECK SECURITY INDICATOR LIGHT (IMMOBILISER SYSTEM UNSET) Get into the vehicle while carrying an electrical key transmitter sub-assembly. Move the shift lever to P. Press the engine switch with the brake pedal released and check that the security indicator light changes from blinking to off at the same time that the power source mode changes to on (ACC). OK Security indicator light changes from blinking to off at the same time that the power source mode changes to on (ACC). HINT: It can be determined that the immobiliser function is operating correctly if the security indicator light changes from blinking to off at the same time that the power source mode changes to on (ACC). NG --> See step 13 OK: Go to next step
7. CHECK COMBINATION METER ASSEMBLY Get into the vehicle while carrying the electrical key transmitter sub-assembly, move the shift lever to P, press the engine switch while depressing the brake pedal and check that the smart warning light is displayed on the combination meter. OK The smart warning light is displayed. HINT: If the smart warning light is displayed when the procedure above is performed, the P, N and brake signals can be considered to be normal. NG --> See step 16 OK: Go to next step
8. READ VALUE USING TECHSTREAM (STARTER SW) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Starting Control / Data List. Get into the vehicle while carrying an electrical key transmitter sub-assembly and press the engine switch with the shift lever in P and brake pedal depressed to check if the Data List display changes. STARTING CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Starter SW Starter operation request/ON or OFF ON: Starter operation requested OFF: Starter operation not requested When malfunctioning, the engine will not crank. OK The Data List display changes. NG --> See step 35 OK: Go to next step
9. INSPECT ST RELAY (STARTER RELAY ASSEMBLY) Inspect the ST relay (starter relay assembly). Refer to «ON-VEHICLE INSPECTION»(ref-551821-S31700741382013051500000) . NG --> REPLACE STARTER RELAY ASSEMBLY OK: Go to next step
10. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - BODY GROUND) Disconnect the A28 certification ECU (smart key ECU assembly) connector. Move the shift lever to P or N. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A28-5 (STAR) - Body ground 20°C (68°F) 93.75 to 136.36 ohms A28-7 (STA) - Body ground TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Certification ECU - Smart Key ECU Assembly) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
11. INSPECT STARTER ASSEMBLY Inspect the starter assembly. Refer to «INSPECTION»(ref-551821-S31960077842013051500000) . NG --> See step 31 OK: Go to next step
12. CHECK HARNESS AND CONNECTOR (BATTERY - STARTER AND ENGINE ROOM RELAY BLOCK AND JUNCTION BLOCK ASSEMBLY) Remove the starter assembly from the vehicle to perform an inspection. Remove the ST relay (starter relay assembly) from the engine room relay block. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition C1-1 - Body ground Always 11 to 14 V 5 - Body ground Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 3 - B3-1 Always Below 1 ohms 3 or B3-1 - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 36
13. CHECK STEERING LOCK Check that the steering unlocks when the engine switch is turned on (ACC). OK The steering unlocks. NG --> See step 23 OK: Go to next step
14. READ VALUE USING TECHSTREAM (IMMOBILISER) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Smart Key / Data List. Read the Data List according to the display on the Techstream. SMART KEY Tester Display Measurement Item/Range Normal Condition Diagnostic Note Immobiliser Immobiliser system status determined by certification ECU (smart key ECU assembly)/Set or Unset Set: Immobiliser system set (engine start prohibited) (engine switch off) Unset: Immobiliser system unset (engine start permitted) (engine switch on (ACC) or on (IG) The engine cannot be started when Set is displayed. HINT: The security indicator light blinks when Set is displayed. The security indicator light is linked with set/unset of the immobiliser and not linked with lock/unlock of the steering. OK Unset is displayed on the Techstream screen when the engine switch is turned on (ACC) or on (IG). NG --> See step 35 OK: Go to next step
15. READ VALUE USING TECHSTREAM (STARTER REQUEST SIGNAL) Connect the Techstream to the DLC3. Turn the engine 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 Starter Request Signal Engine start request signal status/ON or OFF ON: With the shift lever in P and brake pedal depressed, the engine switch is pressed and held OFF: After approx. 1 second has elapsed, the engine switch is released When the engine cannot be started due to a start request signal malfunction, OFF is displayed. When the engine switch is pressed, the duration of time that ON is displayed will be extremely short. As such, the engine switch needs to be pressed and held for a certain period of time. NOTE: Check that the smart warning light is displayed on the multi-information display in the combination meter assembly, and then press the engine switch. OK The Techstream display changes correctly in response to the operation of the engine switch. NG --> See step 35 OK --> See step 34
16. READ VALUE USING TECHSTREAM (NEUTRAL SW/ CLUTCH SW, SHIFT POSITION P OR N) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Power Source Control or Starting 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 Neutral SW/ Clutch SW Shift position (P and N)/ON or OFF ON: Shift lever in P or N OFF: Shift lever in any position other than P or N Use this item to determine whether the park/neutral position switch is malfunctioning. When the engine cannot be started due to a park/neutral position switch malfunction, OFF is displayed. STARTING CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Shift Position P or N Park/neutral position switch status/ON or OFF ON: Shift lever in P or N OFF: Shift lever in any position other than P or N When malfunctioning, the engine will not crank. OK The Techstream display changes correctly in response to the shift position. NG --> See step 18 OK: Go to next step
17. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH1) Connect the Techstream to the DLC3. Turn the engine 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 Stop Light Switch1 State of brake pedal/ON or OFF ON: Brake pedal depressed OFF: Brake pedal released Use this item to determine whether the stop light switch is malfunctioning. The engine cannot be started when this item is OFF. When this item is malfunctioning, the engine can be started by pressing and holding the engine switch for a certain period of time. OK The Techstream display changes correctly in response to the brake pedal operation. NG --> See step 20 OK --> See step 37
18. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY Inspect the park/neutral position switch assembly. Refer to «INSPECTION»(ref-551828-S41006233982013051500000) . NG --> See step 33 OK: Go to next step
19. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - PARK/NEUTRAL POSITION SWITCH) Disconnect the A28 certification ECU (smart key ECU assembly) connector. Disconnect the B1 park/neutral position switch assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A28-5 (STAR) - B1-4 (B) Always Below 1 ohms A28-5 (STAR) or B1-4 (B) - Body ground Always 10 kohms or higher Reconnect the B1 the park/neutral position switch assembly connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A28-5 (STAR) - Body ground Engine switch pressed and held with brake pedal depressed (starter on) --> Engine switch released after approximately 1 second elapses (starter off) 6 V or higher* --> 1.5 V or less TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Certification ECU - Smart Key ECU Assembly) HINT: *: When the engine is cranking, the battery voltage may momentarily drop to approximately 6 V. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 38
20. CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - POWER SOURCE AND BODY GROUND) w/ Cruise Control System Disconnect the A22 stop light switch assembly connector. Measure the voltage and resistance according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A22-7 (B) - A22-2 (GND) Engine switch off 11 to 14 V Standard Resistance Tester Connection Condition Specified Condition A22-2 (GND) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Stop Light Switch Assembly) w/o Cruise Control System Disconnect the A23 stop light switch assembly connector. Measure the voltage and resistance according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A23-1 (B) - A23-3 (GND) Engine switch off 11 to 14 V Standard Resistance Tester Connection Condition Specified Condition A23-3 (GND) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Stop Light Switch Assembly) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
21. CHECK STOP LIGHT SWITCH ASSEMBLY w/ Cruise Control System Reconnect the A22 stop light switch assembly connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A22-1 (OUT) - A22-2 (GND) Engine switch off, brake pedal not depressed Below 1 V A22-1 (OUT) - A22-2 (GND) Engine switch off, brake pedal depressed 11 to 14 V TEXT IN ILLUSTRATION *a Component with harness connected (Stop Light Switch Assembly) w/o Cruise Control System Reconnect the A23 stop light switch assembly connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A23-2 (OUT) - A23-3 (GND) Engine switch off, brake pedal not depressed Below 1 V A23-2 (OUT) - A23-3 (GND) Engine switch off, brake pedal depressed 11 to 14 V TEXT IN ILLUSTRATION *a Component with harness connected (Stop Light Switch Assembly) NG --> See step 27 OK: Go to next step
22. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STOP LIGHT SWITCH ASSEMBLY) See step 4 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 32
23. READ VALUE USING TECHSTREAM (STEERING UNLOCK SWITCH) Connect the Techstream to the DLC3. Turn the engine 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 Steering Unlock Switch State of steering unlock sensor signal output from steering lock actuator assembly/ON or OFF ON: Steering unlocked OFF: Steering locked When the shift lever is in P and the engine switch is off, if any door is opened or closed, the steering is locked. When the electrical key transmitter sub-assembly is in the cabin and the engine switch is turned on (ACC) or on (IG), the steering unlocks. The engine cannot be started when the steering unlock sensor signal is OFF. OK ON (steering unlocked) is displayed on the Techstream screen. NG --> See step 24 OK --> GO TO STEERING LOCK SYSTEM (UNABLE TO UNLOCK STEERING)
24. READ VALUE USING TECHSTREAM (L CODE CHECK) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Smart Key / Data List. Read the Data List according to the display on the Techstream. SMART KEY Tester Display Measurement Item/Range Normal Condition Diagnostic Note L Code Check Verification result between certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator assembly)/OK or NG OK: Verification result normal NG: Verification result abnormal When NG is displayed: The ID code for the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator assembly) is not registered or the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator assembly) is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started). OK OK (verification result normal) is displayed on the Techstream screen when the electrical key transmitter sub-assembly is in the cabin. HINT: Reasons for verification failure: The steering lock ECU (steering lock actuator assembly) or certification ECU (smart key ECU assembly) is malfunctioning. There is a problem with the communication between ECUs. An ECU has been replaced, but is not registered. An ECU has been replaced with an ECU which has a code already stored in it. NG --> See step 25 OK --> See step 40
25. REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Replace the steering lock ECU (steering lock actuator assembly) with a new one. Refer to «DISASSEMBLY»(ref-551670-S15501211422013051500000) . Perform the registration procedure. Refer to «REGISTRATION»(ref-551691-S00631491842013051500000) . Read the Data List according to the display on the Techstream. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Smart Key / Data List. According to the display on the Techstream, read the Data List. SMART KEY Tester Display Measurement Item/Range Normal Condition Diagnostic Note L Code Check Verification result between certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator assembly)/OK or NG OK: Verification result normal NG: Verification result abnormal When NG is displayed: The ID code for the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator assembly) is not registered or the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator assembly) is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started). OK OK (verification result normal) is displayed on the Techstream display. NG --> See step 39 OK --> END (STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) WAS DEFECTIVE)
26. GO TO SFI SYSTEM (PROBLEM SYMPTOMS TABLE). Refer to «PROBLEM SYMPTOMS TABLE»(ref-551690-S40718388022013051500000)
27. REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-551827-S20073206632013051500000)
28. GO TO 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-551902-S28956060062013051500000)
29. GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (IG). Refer to «Power Source Mode does not Change to ON (IG)»(ref-551902-S36530041032013051500000)
30. GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (ACC). Refer to «Power Source Mode does not Change to ON (ACC)»(ref-551902-S20495773422013051500000)
31. REPLACE STARTER ASSEMBLY. Refer to «REMOVAL»(ref-551821-S00227096872013051500000)
32. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-551870-S09131890672013051500000)
33. REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-551828-S25063409992013051500000)
34. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-551669-S19665230182013051500000)
35. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-551870-S09131890672013051500000)
36. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-551870-S09131890672013051500000)
37. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-551870-S09131890672013051500000)
38. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-551870-S09131890672013051500000)
39. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-551870-S09131890672013051500000)
40. REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY). Refer to «DISASSEMBLY»(ref-551670-S15501211422013051500000)

Note. When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle. The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. Make sure that no DTCs are output. If any DTCs are output, proceed to Diagnostic Trouble Code Chart. Refer to DTC CHECK / CLEAR . If the smart key system (for Start Function) is disabled through the customize function, enable the system before performing troubleshooting. Refer to CUSTOMIZE PARAMETERS . Before replacing the certification ECU (smart key ECU assembly) or electrical key transmitter sub-assembly, refer to smart key system (for Start Function) Precaution. Refer to PRECAUTION . Inspect the fuses of circuits related to this system before performing the following inspection procedure. After completing repairs, confirm that the problem does not recur.

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

Scheme 129

Scheme 130

1. CHECK WIRELESS DOOR LOCK CONTROL SYSTEM Check the wireless door lock function by operating the electrical key transmitter sub-assembly. OK Wireless door lock function operates. NG --> See step 18 OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (POWER SOURCE) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK SMART KEY SYSTEM Remove the battery from the electrical key transmitter sub-assembly. Refer to «REPLACEMENT»(ref-551898-S35572151582013051500000) . With the brake pedal depressed, hold the electrical key transmitter sub-assembly near the engine switch and check if the power source mode changes. OK The power source mode changes. HINT: If the power source mode changes, the cabin verification is malfunctioning. Result Result Proceed to The power source mode does not change. A The power source mode changes. B TEXT IN ILLUSTRATION *1 Engine Switch *2 Electrical Key Transmitter Sub-assembly B --> See step 8 A: Go to next step
5. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH1) Connect the Techstream to the DLC3. 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 State of brake pedal/ON or OFF ON: Brake pedal depressed OFF: Brake pedal released Use this item to determine whether the stop light switch is malfunctioning. The engine cannot be started when this item is OFF. When this item is malfunctioning, the engine can be started by pressing and holding the engine switch for a certain period of time. OK The Techstream display changes correctly in response to the brake pedal operation. NG --> See step 11 OK: Go to next step
6. READ VALUE USING TECHSTREAM (POWER SUPPLY CONDITION) 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 state/IG2 ON, ST ON, All OFF, IG1 ON or ACC ON ALL OFF: Engine switch off ACC ON: Engine switch on (ACC) (ACC relay on) IG1 ON: Engine switch on (IG) (IG1 relay on) IG2 ON: Engine switch on (IG) (IG2 relay on) ST ON: Sending engine start request signal Since the IG1 and IG2 relays turn on at approximately the same time, IG1 ON may not be displayed (the IG1 relay turns on for a very short time). With the engine switch off and brake pedal depressed, hold the electrical key transmitter sub-assembly near the engine switch for 2 seconds or more and read the Data List. OK IG2 ON is displayed on the Techstream screen. HINT: If the smart key system (for Start Function) function has been canceled on the customization menu, ACC ON is displayed on the Techstream screen. NG --> See step 14 OK: Go to next step
7. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Measure the voltage according to the value(s) in the table below. TEXT IN ILLUSTRATION *a Component with harness connected (Certification ECU - Smart Key ECU Assembly) - - 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 state/IG2 ON, ST ON, All OFF, IG1 ON or ACC ON All OFF: Engine switch off (ACC and IG) ACC ON: Engine switch on (ACC) IG1 ON: Engine switch on (IG) (IG1 relay on) IG2 ON: Engine switch on (IG) (IG2 relay on) ST ON: Sending engine start request signal Since the IG1 and IG2 relays turn on at approximately the same time, IG1 ON may not be displayed (the IG1 relay turns on for a very short time). Measure the voltage while reading the Data List on the Techstream. Standard Voltage Tester Connection Condition Specified Condition D64-6 (IG1D) - Body ground Engine switch off 1 V or less Engine switch on (ACC) 1 V or less Engine switch on (IG) 9 V or higher A28-9 (IG2D) - Body ground Engine switch off 1 V or less Engine switch on (ACC) 1 V or less Engine switch on (IG) 9 V or higher D64-4 (ACCD) - Body ground Engine switch off 1 V or less Engine switch on (ACC) 8.5 V or higher Engine switch on (IG) 8.5 V or higher NG --> See step 15 OK --> CHECK RELAY CONTACT SIDE CIRCUIT
8. READ VALUE USING TECHSTREAM (START SWITCH1, START SWITCH2) 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 Engine switch 1 status/ON or OFF ON: Engine switch pressed OFF: Engine switch not pressed If the engine switch is pressed for a short time, the display may not change. Use this item to determine whether the engine switch input signal is malfunctioning. Start Switch2 Engine switch 2 status/ON or OFF ON: Engine switch pressed OFF: Engine switch not pressed Backup for engine switch 1. However, when the engine switch is pressed and held, the control functions only when both engine switch 1 and 2 are normal. Behaves the same way as engine switch 1. OK The Techstream display changes correctly in response to the engine switch operation. Result Result Proceed to NG A OK B B --> See step 19 A: Go to next step
9. INSPECT ENGINE SWITCH Inspect the engine switch. Refer to «INSPECTION»(ref-551821-S42761654222013051500000) . NG --> See step 16 OK: Go to next step
10. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ENGINE SWITCH) Disconnect the D64 certification ECU (smart key ECU assembly) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D64-28 (SSW1) - D46-5 (SS1) Always Below 1 ohms D64-30 (SSW2) - D46-1 (SS2) Always Below 1 ohms D64-28 (SSW1) or D46-5 (SS1) - Body ground Always 10 kohms or higher D64-30 (SSW2) or D46-1 (SS2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 15
11. CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - POWER SOURCE AND BODY GROUND) See step 20 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
12. CHECK STOP LIGHT SWITCH ASSEMBLY See step 21 NG --> See step 20 OK: Go to next step
13. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STOP LIGHT SWITCH ASSEMBLY) See step 4 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 15
14. CHECK FOR DTC Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-551677-S34243316752013051500000) . Result Result Proceed to The following DTCs are not output: B2784 B287A A DTC B2784 is output. B DTC B278A is output. C B --> See step 17 C --> See step 21 A --> REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY
15. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-551870-S09131890672013051500000)
16. REPLACE ENGINE SWITCH. Refer to «REMOVAL»(ref-551821-S16277802882013051500000)
17. GO TO DIAGNOSTIC TROUBLE CODE CHART (B2784). Refer to «DTC B2284: Brake Signal Malfunction»(ref-551902-S21728980142013051500000)
18. GO TO OTHER DIAGNOSTIC PROCEDURE (All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate). Refer to «All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate»(ref-551899-S25943007702013051500000)
19. GO TO OTHER DIAGNOSTIC PROCEDURE (Room Oscillator does not Recognize Key). Refer to «Room Oscillator does not Recognize Key»(ref-551899-S03268366932013051500000)
20. REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-551827-S20073206632013051500000)
21. GO TO DIAGNOSTIC TROUBLE CODE CHART (B278A). Refer to «DTC B278A: Short to GND in Immobiliser System Power Source Circuit»(ref-551904-S24103276102013051500000)

Note. When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle. The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. Make sure that no DTCs are output. If any DTCs are output, proceed to Diagnostic Trouble Code Chart. Refer to DIAGNOSTIC TROUBLE CODE CHART . If the smart key system (for Start Function) is disabled through the customize function, enable the system before performing troubleshooting. Refer to CUSTOMIZE PARAMETERS . Before replacing the certification ECU (smart key ECU assembly), refer to smart key system (for Start Function) Precaution. Refer to PRECAUTION . Inspect the fuses of circuits related to this system before performing the following inspection procedure. After completing repairs, confirm that the problem does not recur.

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

Scheme 131

Scheme 132

1. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - NO. 1 INTEGRATION RELAY) Disconnect the A28 certification ECU (smart key ECU assembly) connector. Disconnect the 1C and 1E No. 1 integration relay connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A28-9 (IG2D) - 1C-8 Always Below 1 ohms 1E-2 - Body ground Always Below 1 ohms A28-9 (IG2D) or 1C-8 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. INSPECT NO. 1 INTEGRATION RELAY (IG2 RELAY) Remove the No. 1 integration relay. Refer to «REMOVAL»(ref-551822-S42841915732013051500000) . Inspect the No. 1 integration relay. Refer to «INSPECTION»(ref-551822-S17470813472013051500000) . NG --> See step 8 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) Disconnect the D64 certification ECU (smart key ECU assembly) connector. Disconnect the 3A and 3B instrument panel junction block assembly connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D64-6 (IG1D) - 3A-29 Always Below 1 ohms 3B-7 - Body ground Always Below 1 ohms D64-6 (IG1D) or 3A-29 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG1 NO. 1, IG1 NO. 2, IG1 NO. 3 AND IG1 NO. 4 RELAY) Remove the instrument panel junction block assembly. Refer to «REMOVAL»(ref-551868-S36095780392013051500000) . Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Refer to «REMOVAL»(ref-551868-S36095780392013051500000) . Measure the resistance according to the value(s) in the table below. TEXT IN ILLUSTRATION *a Component without harness connected (Instrument Panel Junction Block Assembly) - - Standard Resistance Tester Connection Condition Specified Condition 3E-1 - 3D-32 (IG1 No. 1 relay) 3E-1 - 3D-17 (IG1 No. 2 relay) 3E-1 - 3C-3 (IG1 No. 3 relay) 3E-1 - 3C-14 (IG1 No. 4 relay) Battery voltage not applied to terminals 3A-29 and 3B-7 10 kohms or higher Battery voltage applied to terminals 3A-29 and 3B-7 Below 1 ohms NG --> See step 6 OK: Go to next step
5. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Measure the voltage according to the value(s) in the table below. TEXT IN ILLUSTRATION *a Component with harness connected (Certification ECU - Smart Key ECU Assembly) - - Standard Voltage Tester Connection Condition Specified Condition A28-9 (IG2D) - Body ground Engine switch on (ACC) --> Engine switch on (IG) 1 V or less --> 9 V or higher D64-6 (IG1D) - Body ground Engine switch on (ACC) --> Engine switch on (IG) 1 V or less --> 9 V or higher NG --> See step 7 OK --> CHECK RELAY CONTACT SIDE CIRCUIT
6. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL»(ref-551868-S36095780392013051500000)
7. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-551898-S38938020822013051500000)
8. REPLACE NO. 1 INTEGRATION RELAY. Refer to «REMOVAL»(ref-551868-S42327986012013051500000)

Note. When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle. The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. Make sure that no DTCs are output. If any DTCs are output, proceed to Diagnostic Trouble Code Chart. Refer to DIAGNOSTIC TROUBLE CODE CHART . If the smart key system (for Start Function) is disabled through the customize function, enable the system before performing troubleshooting. Refer to CUSTOMIZE PARAMETERS . Before replacing the certification ECU (smart key ECU assembly), refer to smart key system (for Start Function) Precaution. Refer to PRECAUTION . Inspect the fuses for circuits related to this system before performing the following inspection procedure. After completing repairs, confirm that the problem does not recur.

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