Smart Key System (For Start Function) (Diagnostic Codes & Symptom Tests): Diagnosis Scion tC II

INSPECTION PROCEDURE

Note. When using the Techstream with the engine 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: Body Electrical / Smart Key / Trouble Codes. The smart key system 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 of 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 84

Scheme 85

Scheme 86

1. CHECK HARNESS AND CONNECTOR (BATTERY - POWER SOURCE CONTROL ECU) Disconnect the C43 power source control ECU connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition C43-2 (AM21) - Body ground Always 9.5 to 14 V C43-1 (AM22) - Body ground TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Power Source Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - BODY GROUND) Disconnect the C43 power source control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition C43-6 (GND) - Body ground Always Below 1 ohms C43-5 (GND2) - Body ground TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Power Source Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK POWER SOURCE CONTROL ECU Connect the power source control ECU connectors. TEXT IN ILLUSTRATION *a Component with harness connected (Power Source Control ECU) - - Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition C42-8 (IG2D) - Body ground Engine switch off 1 V or less Engine switch on (IG)* 9 V or higher C43-20 (IG1D) - Body ground Engine switch off 1 V or less Engine switch on (IG)* 9 V or higher HINT: *: To turn the engine switch on (IG), carry the electrical key transmitter and press the engine switch twice with the shift lever in P (for Automatic Transaxle) and the brake pedal (for Automatic Transaxle) or clutch pedal (for Manual Transaxle) released. NG --> See step 4 OK --> SYSTEM RETURNED TO NORMAL (DTC STORED DUE TO BAD CONNECTION, BUT SYSTEM RETURNED TO NORMAL BY RECONNECTING CONNECTOR)
4. REPLACE POWER SOURCE CONTROL ECU. Refer to «REMOVAL»(ref-451224-S38850013962012020700000)

Note. When using the Techstream with the engine 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: Body Electrical / Smart Key / Trouble Codes. The smart key system 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 of 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 87

Scheme 88

1. CHECK HARNESS AND CONNECTOR (BATTERY - POWER SOURCE CONTROL ECU) 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 (POWER SOURCE 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 (ACC RELAY) Disconnect the 2C and 2D instrument panel junction block assembly connectors. TEXT IN ILLUSTRATION *a Component without harness connected (Instrument Panel Junction Block Assembly) - - Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2C-25 - 2D-9 20°C (68°F) 181.82 to 272.73 ohms NG --> REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) Disconnect the C43 power source control ECU connector. Disconnect the 2C and 2D 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 C43-19 (ACCD) - 2C-25 Always Below 1 ohms 2D-9 - Body ground Always Below 1 ohms C43-19 (ACCD) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK POWER SOURCE CONTROL ECU Connect the power source control ECU connectors. TEXT IN ILLUSTRATION *a Component with harness connected (Power Source Control ECU) - - Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition C43-19 (ACCD) - Body ground Engine switch off 1 V or less Engine switch on (ACC)* 8.5 V or higher HINT: *: To turn the engine switch on (ACC), carry the electrical key transmitter and press the engine switch with the shift lever in P (for Automatic Transaxle) and the brake pedal (for Automatic Transaxle) or clutch pedal (for Manual Transaxle) released. NG --> See step 6 OK --> SYSTEM RETURNED TO NORMAL (DTC STORED DUE TO BAD CONNECTION, BUT SYSTEM RETURNED TO NORMAL BY RECONNECTING CONNECTOR)
6. REPLACE POWER SOURCE CONTROL ECU. Refer to «REMOVAL»(ref-451224-S38850013962012020700000)

Note. When using the Techstream with the engine 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: Body Electrical / Smart Key / Trouble Codes. The smart key system 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 source control ECU. If there are any signs of water damage, replace the power source control ECU and take measures against the cause of the water damage.

Note. When using the Techstream with the engine 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: Body Electrical / Smart Key / Trouble Codes. The smart key system 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 of 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 89

Scheme 90

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. According to the display on the Techstream, compare the actual vehicle speed with the Data List value. COMBINATION METER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Vehicle Speed Meter Vehicle speed/Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph) Almost same as actual vehicle speed - OK The Data List value is approximately the same as the actual vehicle speed. NG --> See step 7 OK: Go to next step
2. READ VALUE USING TECHSTREAM (VEHICLE SPEED 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. According to the display on the Techstream, read the Data List. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Vehicle Speed Signal Vehicle moving or stationary/Stop or Run Run: Vehicle moving at 5 km/h (3 mph) or more Stop: Vehicle stopped - OK Stop (vehicle stopped) or Run (vehicle moving) appears on the screen according to the vehicle speed. NG --> See step 3 OK --> See step 8
3. CHECK HARNESS AND CONNECTOR (BATTERY - POWER SOURCE CONTROL ECU) 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 (POWER SOURCE CONTROL ECU - BODY GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - COMBINATION METER) Disconnect the C43 power source control ECU connector. Disconnect the C50 combination meter assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition C43-23 (SPD) - C50-32 (+S) Always Below 1 ohms C43-23 (SPD) or C50-32 (+S) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. CHECK COMBINATION METER ASSEMBLY Using an oscilloscope, check the vehicle speed input signal waveform from the combination meter at the terminal of the power source control ECU. TEXT IN ILLUSTRATION *a Component with harness connected (Power Source Control ECU) - - Check the signal waveform according to the conditions in the table below. Standard Tester Connection Tool Setting Condition Specified Condition C43-23 (SPD) - Body ground 5 V/DIV., 100 ms./DIV. Engine switch on (IG), vehicle being driven at approx. 5 km/h (3 mph) Correct waveform is as shown in illustration NG --> See step 9 OK --> See step 10
7. GO TO METER / GAUGE SYSTEM (SPEED SIGNAL CIRCUIT). Refer to «Speed Signal Circuit»(ref-451185-S18478867742012020700000)
8. GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-451058-S42528746202012020700000)
9. GO TO METER / GAUGE SYSTEM (SPEED SIGNAL CIRCUIT). Refer to «Speed Signal Circuit»(ref-451185-S18478867742012020700000)
10. REPLACE POWER SOURCE CONTROL ECU. Refer to «REMOVAL»(ref-451224-S38850013962012020700000)

Note. When using the Techstream with the engine 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: Body Electrical / Smart Key / Trouble Codes. The smart key system 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 of 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 91

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. According to the display on the Techstream, read the Data List. 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 ON (brake pedal depressed) and OFF (brake pedal released) appear on the screen according to the stop light switch condition. NG --> See step 2 OK --> See step 5
2. CHECK HARNESS AND CONNECTOR (BATTERY - POWER SOURCE CONTROL ECU) 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 (POWER SOURCE CONTROL ECU - BODY GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY) Disconnect the C42 power source control ECU connector. Disconnect the A1 stop light switch assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition C42-11 (STP1) - A1-1 Always Below 1 ohms C42-11 (STP1) or A1-1 - Body ground Always 10 kohms or higher Reconnect the A1 stop light switch assembly connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition C42-11 (STP1) - Body ground Brake pedal not depressed Below 1 V Brake pedal depressed 9 V or higher TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Power Source Control ECU) 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-451061-S22323682572012020700000)
6. REPLACE POWER SOURCE CONTROL ECU. Refer to «REMOVAL»(ref-451224-S38850013962012020700000)

Note. When using the Techstream with the engine 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: Body Electrical / Smart Key / Trouble Codes. The smart key system 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 of circuits related to this system before performing the following inspection procedure. When replacing the steering lock actuator assembly (steering lock ECU), registration must be performed. Refer to REGISTRATION . 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

If the engine switch indicator is blinking in green, the steering lock bar may be stuck.

Scheme 92

1. CHECK FOR DTC (LIN COMMUNICATION SYSTEM) Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-451056-S40407541942012020700000) . OK LIN communication system DTC B2287 is not output simultaneously. HINT: If the lock and unlock functions of the steering lock do not operate, the engine switch cannot be turned on (IG) and the engine cannot be started. If LIN communication does not function, 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. According to the display on the Techstream, read the Data List. 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*1 OFF: Steering locked*2 When the shift lever is in P (for Automatic Transaxle) and the engine switch is off, if any door is opened or closed, the steering is locked. When the electrical key transmitter is inside the vehicle and the engine switch is turned on (ACC) or on (IG), the steering unlocks. The engine cannot be started when the steering unlock signal is off. HINT: If the engine switch cannot be turned on (IG), proceed to the next step. *1: When the electrical key transmitter is inside the vehicle and the engine switch is turned on (ACC) or on (IG), the steering unlocks. *2: When the shift lever is in P (for Automatic Transaxle) and the engine switch is off, if any door is opened or closed, the steering is locked. RESULT Result Proceed to Data List item does not change A Data List item changes B B --> See step 5 A: Go to next step
3. CHECK HARNESS AND CONNECTOR (BATTERY - POWER SOURCE CONTROL ECU) 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 (POWER SOURCE CONTROL ECU - BODY GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) Measure the resistance according to the value(s) in the table below. HINT: DTC P2285 may be stored due to an internal malfunction in the steering lock actuator. Lock and unlock position signals are sent separately to the power source control ECU from the steering lock actuator assembly to identify the steering lock position. Standard Resistance Tester Connection Condition Specified Condition Positive (+) tester probe --> C18-4 (SLP1) Negative (-) tester probe --> Body ground Steering locked*1 10 kohms or higher Positive (+) tester probe --> C18-4 (SLP1) Negative (-) tester probe --> Body ground Steering unlocked*2 Below 1 ohms HINT: *1: When the electrical key transmitter is inside the vehicle and the engine switch is turned on (ACC) or on (IG), the steering unlocks. *2: When the shift lever is in P (for Automatic Transaxle) and the engine switch is off, if any door is opened or closed, the steering is locked. With the connector connected to the ECU, measure the resistance from the rear of the connector. TEXT IN ILLUSTRATION *a Component with harness connected (Steering Lock ECU) NG --> See step 9 OK: Go to next step
6. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - STEERING LOCK ECU) Disconnect the C43 power source control ECU connector. Disconnect the C18 steering lock ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition C43-3 (SLP) - C18-4 (SLP1) Always Below 1 ohms C43-3 (SLP) or C18-4 (SLP1) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 8
7. GO TO DTC B2287. Refer to «DTC B2287: LIN Communication Master Malfunction; DTC B278C: Lost Communication with Power Source Control»(ref-451231-S14740771642012020700000)
8. REPLACE POWER SOURCE CONTROL ECU. Refer to «REMOVAL»(ref-451224-S38850013962012020700000)
9. REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU). Refer to «DISASSEMBLY»(ref-451194-S17610953872012020700000)

Note. When using the Techstream with the engine 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: Body Electrical / Smart Key / Trouble Codes. The smart key system 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 of 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 93

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. According to the display on the Techstream, read the Data List. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Engine Condition Condition of engine/Stop or Run Run: Engine running Stop: Engine stopped - STARTING CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Engine Speed Engine speed/0 to 16383 r/min Changes according to engine speed - OK The Data List items change in accordance with the engine condition. NG --> See step 2 OK --> See step 6
2. CHECK HARNESS AND CONNECTOR (BATTERY - POWER SOURCE CONTROL ECU) 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 (POWER SOURCE CONTROL ECU - BODY GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - ECM) Disconnect the C42 power source control ECU connector. Disconnect the A35 ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition C42-4 (NE) - A35-53 (NEO) Always Below 1 ohms C42-4 (NE) or A35-53 (NEO) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK POWER SOURCE CONTROL ECU Reconnect the power source control ECU connectors. TEXT IN ILLUSTRATION *a Component with harness connected (Power Source Control ECU) - - Check the engine speed input signal waveform at the terminal of the power source control ECU. Standard Tester Connection Condition Specified Condition C42-4 (NE) - Body ground Engine stopped No pulse generated Engine running Pulse generated NG --> See step 8 OK --> See step 7
6. GO TO SFI SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-451061-S22323682572012020700000)
7. REPLACE POWER SOURCE CONTROL ECU. Refer to «REMOVAL»(ref-451224-S38850013962012020700000)
8. GO TO SFI SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-451061-S22323682572012020700000)

Note. When using the Techstream with the engine 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: Body Electrical / Smart Key / Trouble Codes. The smart key system 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 of 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

Note. When using the Techstream with the engine 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: Body Electrical / Smart Key / Trouble Codes. The smart key system 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 key system 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 steering lock actuator assembly (steering lock ECU), certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU), registration must be performed. Refer to REGISTRATION . If the steering lock actuator assembly (steering lock ECU) is replaced, be sure to confirm that the steering is 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 reoccur.

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

HINT

for Automatic Transaxle

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 94

Scheme 95

Scheme 96

Scheme 97

1. CHECK BATTERY Measure the battery voltage. Standard voltage 11 to 14 V HINT: A simple method to determine whether the battery is depleted is to operate the horn. NG --> GO TO CHARGING SYSTEM OK: Go to next step
2. READ VALUE USING TECHSTREAM (POWER SUPPLY OPEN) AND CHECK FOR DTC 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 Power Supply Open Record of malfunction of signal sent to steering lock actuator assembly (motor) from power source control ECU (open circuit) (DTC B2782 stored)/OK or NG(Past) OK: No record of malfunction (open circuit) NG(Past): Record of malfunction (open circuit) exists This item records malfunctions in the circuit between the power source control ECU and steering lock actuator assembly (motor). Using the Techstream, confirm the output of DTCs for all systems. RESULT Result Proceed to No DTC is output and power supply open circuit has not occurred in past A DTCs are output (except DTC B2782) B Power supply open circuit has occurred in past and/or DTC B2782 is output C B --> GO TO DTC CHART C --> See step 34 A: Go to next step
3. CHECK ENGINE SWITCH CONDITION When the electrical key transmitter is inside the vehicle and the shift lever is in P (for Automatic Transaxle), push the engine switch with the brake pedal (for Automatic Transaxle) or clutch pedal (for Manual Transaxle) released and check that the power source mode changes. RESULT Result Proceed to Power source mode changes as follows (normal): off --> on (ACC) --> on (IG) --> off A Power source mode does not change to on (IG) or on (ACC) B Power source mode does not change to on (IG) but does change to on (ACC) C Power source mode does not change to on (ACC) but does change to on (IG) D B --> See step 35 C --> See step 36 D --> See step 37 A: Go to next step
4. CHECK CRANKING FUNCTION Get into the vehicle while carrying the electrical key transmitter. Move the shift lever to P (for Automatic Transaxle). Depress the brake pedal (for Automatic Transaxle) or clutch pedal (for Manual Transaxle). Confirm that the engine switch indicator illuminates in green, and then press the engine switch and check that the engine cranks. RESULT Result Proceed to Engine does not crank A Engine cranks, but there is no initial combustion B Engine cranks, but is difficult to start C B --> See step 38 C --> See step 39 A: Go to next step
5. CHECK SECURITY INDICATOR LIGHT (ENGINE IMMOBILISER SYSTEM UNSET) Get into the vehicle while carrying the electrical key transmitter, move the shift lever to P (for Automatic Transaxle), press the engine switch while not depressing the brake pedal (for Automatic Transaxle) or clutch pedal (for Manual Transaxle) and check that the security indicator light stops blinking and turns off at the same time the power source mode changes to on (ACC). OK The security indicator light stops blinking and turns off at the same time the power source mode changes to on (ACC). HINT: If the security indicator light stops blinking and turns off at the same time the power source mode changes to on (ACC), the engine immobiliser function can be presumed to be normal. NG --> See step 12 OK: Go to next step
6. CHECK ENGINE SWITCH INDICATOR LIGHT Get into the vehicle while carrying the electrical key transmitter, move the shift lever to P (for Automatic Transaxle), press the engine switch while depressing the brake pedal (for Automatic Transaxle) or clutch pedal (for Manual Transaxle) and check that the engine switch indicator changes. OK The indicator illuminates in green. HINT: If the engine switch indicator illuminates in green when the procedure above is performed, the P, N and brake signals (for Automatic Transaxle) or clutch signal (for Manual Transaxle) can be considered to be normal. RESULT Result Proceed to OK A NG for Automatic Transaxle B for Manual Transaxle C B --> See step 17 C --> See step 23 A: Go to next step
7. 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 the electrical key transmitter, move the shift lever to P (for Automatic Transaxle), press the engine switch while depressing the brake pedal (for Automatic Transaxle) or clutch pedal (for Manual Transaxle) and confirm that the Data List item changes. STARTING CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Starter SW Starter activation request/ON or OFF ON: Starter activation requested OFF: Starter activation not requested When there is a malfunction, the engine cannot be cranked. OK The Data List item changes. NG --> See step 40 OK: Go to next step
8. INSPECT ST RELAY Remove the ST relay from the No. 3 relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 93.8 to 136.4 ohms 3 - 5 Battery voltage not applied to terminals 1 and 2 10 kohms or higher Battery voltage applied to terminals 1 and 2 Below 1 ohms Reinstall the ST relay to the No. 3 relay block. NG --> REPLACE ST RELAY OK: Go to next step
9. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - BODY GROUND) Disconnect the C42 power source control ECU connector. Move the shift lever to P or N (for Automatic Transaxle) or depress the clutch pedal (for Manual Transaxle). Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition C42-3 (STAR) - Body ground 20°C (68°F) 93.8 to 136.4 ohms C42-2 (STA) - Body ground TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Power Source Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
10. INSPECT STARTER ASSEMBLY Inspect the starter assembly. Refer to «INSPECTION»(ref-451175-S22273616042012020700000) . NG --> See step 41 OK: Go to next step
11. CHECK HARNESS AND CONNECTOR (BATTERY - STARTER AND NO. 3 RELAY BLOCK) Remove the starter assembly from the vehicle to perform an inspection. Remove the ST relay from the No. 3 relay block. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition B4-1 - Body ground Always 11 to 14 V 5 - Body ground Always 11 to 14 V Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 3 - B9-1 Always Below 1 ohms 3 or B9-1 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 42
12. READ VALUE USING TECHSTREAM (S 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. According to the display on the Techstream, read the Data List. SMART KEY Tester Display Measurement Item/Range Normal Condition Diagnostic Note S Code Check Verification result between certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU)/OK or NG OK: Verification result normal NG: Verification result abnormal When a malfunction is present: The ID code for the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is not registered or the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started). OK OK (S code certification result normal) appears on the screen. NG --> See step 26 OK: Go to next step
13. CHECK STEERING LOCK Check that the steering unlocks when the engine switch is turned on (ACC). OK The steering unlocks. NG --> See step 28 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. According to the display on the Techstream, read the Data List. SMART KEY Tester Display Measurement Item/Range Normal Condition Diagnostic Note Immobiliser State of immobiliser system determined by certification ECU (smart key ECU assembly)/ Set or Unset Unset: Engine immobiliser unset (engine switch on [ACC] or on [IG]) Set: Engine immobiliser set (engine switch off) When the immobiliser cannot be unset, this item can be used to determine whether the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is part of the problem. The engine cannot be started when this item displays "Set". HINT: The state of the immobiliser (whether it is set or unset) can be determined through the certification ECU (smart key ECU assembly). If this item displays "Set", the communication between the certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU) can be determined to be normal. The security indicator light operation is only linked with the state of the immobiliser (set/unset), and is not related to the steering lock operation (lock/unlock). When the immobiliser is set, the security indicator light blinks. OK The Data List item changes to "Unset" when the engine switch is turned on (ACC) or on (IG). NG --> See step 32 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. According to the display on the Techstream, read the Data List. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Starter Request Signal Condition of engine start command signal/ON or OFF ON: Engine switch pressed and held while carrying electrical key transmitter with shift lever in P (for Automatic Transaxle) and brake pedal (for Automatic Transaxle) or clutch pedal (for Manual Transaxle) depressed OFF: Engine switch released after approximately 1 second elapses This item displays "ON" when cranking the engine. The engine cannot be started when this item is "OFF". OK The display changes in response to the operation of the engine switch. NOTE: Make sure that the engine switch indicator is illuminated in green before pressing the engine switch. NG --> See step 43 OK: Go to next step
16. REPLACE ID CODE BOX (IMMOBILISER CODE ECU) Replace the ID code box (immobiliser code ECU) with a new one. Refer to «REMOVAL»(ref-451232-S32596443462012020700000) . Perform the registration procedures. Refer to «REGISTRATION»(ref-451065-S16272258382012020700000) . Get into the vehicle while carrying the electrical key transmitter, move the shift lever to P (for Automatic Transaxle), press the engine switch while not depressing the brake pedal (for Automatic Transaxle) or clutch pedal (for Manual Transaxle) and check that the security indicator light stops blinking and turns off at the same time the power source mode changes to on (ACC). NEXT --> END
17. READ VALUE USING TECHSTREAM (SHIFT P SIGNAL, 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. According to the display on the Techstream, read the Data List. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Shift P Signal Shift position (P)/ON or OFF ON: Shift lever in P OFF: Shift lever not in P Use this item to determine if the shift position switch is malfunctioning. Neutral SW/ Clutch SW Shift position (P, N) (for Automatic Transaxle) or state of clutch pedal (for Manual Transaxle)/ON or OFF ON: Shift lever in P or N (for Automatic Transaxle) or clutch pedal depressed (for Manual Transaxle) OFF: Shift lever not in P or N (for Automatic Transaxle) or clutch pedal released (for Manual Transaxle) Use this item to help determine if the park/neutral position switch (for Automatic Transaxle) or clutch switch (for Manual Transaxle) is malfunctioning. The engine cannot be started when this item is "OFF". STARTING CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Shift Position P or N Condition of park/neutral position switch (for Automatic Transaxle) or state of clutch pedal (for Manual Transaxle)/ON or OFF ON: Shift lever in P or N (for Automatic Transaxle) or clutch pedal depressed (for Manual Transaxle) OFF: Shift lever not in P or N (for Automatic Transaxle) or clutch pedal released (for Manual Transaxle) When there is a malfunction, the engine cannot be cranked. OK The items in the Data List change according to the shift position. NG --> See step 19 OK: Go to next step
18. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH1) See step 1 NG --> See step 21 OK --> See step 44
19. INSPECT PARK/NEUTRAL POSITION SWITCH Disconnect the B14 park/neutral position switch connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 4 (B) - 9 (L) Shift lever in P or N Below 1 ohms Shift lever not in P or N 10 kohms or higher TEXT IN ILLUSTRATION *a Component without harness connected (Park/Neutral Position Switch) NG --> See step 45 OK: Go to next step
20. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - PARK/NEUTRAL POSITION SWITCH) Disconnect the C42 power source control ECU connector. Disconnect the B14 park/neutral position switch connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition C42-3 (STAR) - B14-4 (B) Always Below 1 ohms C42-3 (STAR) - Body ground Always 10 kohms or higher Reconnect the park/neutral position switch connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition C42-3 (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* --> 1.8 V or less 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 46
21. INSPECT STOP LIGHT SWITCH ASSEMBLY Disconnect the A1 stop light switch connector. Inspect the stop light switch assembly. Refer to «INSPECTION»(ref-451186-S31823982232012020700000) . NG --> See step 47 OK: Go to next step
22. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY) See step 4 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 48
23. READ VALUE USING TECHSTREAM (NEUTRAL SW/ CLUTCH SW) 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. According to the display on the Techstream, read the Data List. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Neutral SW/ Clutch SW Shift position (P, N) (for Automatic Transaxle) or state of clutch pedal (for Manual Transaxle)/ON or OFF ON: Shift lever in P or N (for Automatic Transaxle) or clutch pedal depressed (for Manual Transaxle) OFF: Shift lever not in P or N (for Automatic Transaxle) or clutch pedal released (for Manual Transaxle) Use this item to help determine if the park/neutral position switch (for Automatic Transaxle) or clutch switch (for Manual Transaxle) is malfunctioning. The engine cannot be started when this item is "OFF". OK ON (clutch pedal depressed) and OFF (clutch pedal released) appear on the screen according to the condition of the clutch pedal. NG --> See step 24 OK --> See step 48
24. INSPECT CLUTCH START SWITCH Disconnect the A4 clutch start switch connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 Pushed in (Clutch pedal depressed) Below 1 ohms Released (Clutch pedal released) 10 kohms or higher TEXT IN ILLUSTRATION *a Component without harness connected (Clutch Pedal Switch Assembly) NG --> REPLACE CLUTCH START SWITCH OK: Go to next step
25. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - CLUTCH START SWITCH) Disconnect the C42 power source control ECU connector. Disconnect the A4 clutch start switch connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition C42-3 (STAR) - A4-2 Always Below 1 ohms C42-3 (STAR) - Body ground Always 10 kohms or higher Reconnect the clutch start switch connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition C42-3 (STAR) - Body ground Engine switch pressed and held with clutch start switch depressed (starter on) --> Engine switch released after approximately 1 second elapses (starter off) 6 V or higher* --> 1.8 V or less 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 48
26. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Replace the certification ECU (smart key ECU assembly) with a new one. Refer to «REMOVAL»(ref-451232-S11677392442012020700000) . Perform the registration procedures. Refer to «REGISTRATION»(ref-451065-S16272258382012020700000) . Use the Data List to check if S code certification is functioning properly again. SMART KEY Tester Display Measurement Item/Range Normal Condition Diagnostic Note S Code Check Verification result between certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU)/OK or NG OK: Verification result normal NG: Verification result abnormal When a malfunction is present: The ID code for the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is not registered or the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started). OK OK (S code certification result normal) appears on the screen. NG --> See step 27 OK --> END
27. REPLACE ID CODE BOX (IMMOBILISER CODE ECU) Replace the ID code box (immobiliser code ECU) with a new one. Refer to «REMOVAL»(ref-451232-S32596443462012020700000) . Perform the registration procedures. Refer to «REGISTRATION»(ref-451065-S16272258382012020700000) . Use the Data List to check if S code certification is functioning properly again. SMART KEY Tester Display Measurement Item/Range Normal Condition Diagnostic Note S Code Check Verification result between certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU)/OK or NG OK: Verification result normal NG: Verification result abnormal When a malfunction is present: The ID code for the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is not registered or the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started). NEXT --> END
28. 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. According to the display on the Techstream, read the Data List. 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 (for Automatic Transaxle) and the engine switch is off, if any door is opened or closed, the steering is locked. When the electrical key transmitter is inside the vehicle and the engine switch is turned on (ACC) or on (IG), the steering unlocks. The engine cannot be started when the steering unlock signal is off. OK The item in the Data List indicates "OFF" (the steering is locked). NG --> See step 29 OK --> See step 49
29. 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. 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 ID code box (immobiliser code ECU) and steering lock actuator assembly/OK or NG OK: Verification result normal NG: Verification result abnormal When a malfunction is present: The ID code for the ID code box (immobiliser code ECU) or steering lock actuator assembly is not registered or the ID code box (immobiliser code ECU) or steering lock actuator is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started). OK The Data List item changes to "OK" when the electrical key transmitter is inside the vehicle. HINT: Reasons for verification failure: The steering lock ECU or ID code box (immobiliser code ECU) is malfunctioning. There is a problem with the communication between ECUs. An ECU is replaced, but is not registered. An ECU is replaced with an ECU which has a code already stored in it. NG --> See step 31 OK: Go to next step
30. REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) Replace the steering lock actuator assembly (steering lock ECU) with a new one. Refer to «DISASSEMBLY»(ref-451194-S17610953872012020700000) . Perform the registration procedures. Refer to «REGISTRATION»(ref-451065-S16272258382012020700000) . Turn the engine switch on (IG). Operate the steering wheel and check the steering condition. NEXT --> END
31. REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) Replace the steering lock actuator assembly (steering lock ECU) with a new one. Refer to «DISASSEMBLY»(ref-451194-S17610953872012020700000) . Perform the registration procedures. Refer to «REGISTRATION»(ref-451065-S16272258382012020700000) . Use the Data List to check if L code certification is functioning properly again. SMART KEY Tester Display Measurement Item/Range Normal Condition Diagnostic Note L Code Check Verification result between ID code box (immobiliser code ECU) and steering lock actuator assembly/OK or NG OK: Verification result normal NG: Verification result abnormal When a malfunction is present: The ID code for the ID code box (immobiliser code ECU) or steering lock actuator assembly is not registered or the ID code box (immobiliser code ECU) or steering lock actuator is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started). OK OK (L code certification result normal) appears on the screen. NG --> See step 50 OK --> END
32. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Replace the certification ECU (smart key ECU assembly) with a new one. Refer to «REMOVAL»(ref-451232-S11677392442012020700000) . Perform the registration procedures. Refer to «REGISTRATION»(ref-451065-S16272258382012020700000) . Use the Data List to check if S code certification is functioning properly again. SMART KEY Tester Display Measurement Item/Range Normal Condition Diagnostic Note S Code Check Verification result between certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU)/OK or NG OK: Verification result normal NG: Verification result abnormal When a malfunction is present: The ID code for the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is not registered or the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started). OK OK (S code certification result normal) appears on the screen. NG --> See step 33 OK --> END
33. REPLACE ID CODE BOX (IMMOBILISER CODE ECU) Replace the ID code box (immobiliser code ECU) with a new one. Refer to «REMOVAL»(ref-451232-S32596443462012020700000) . Perform the registration procedures. Refer to «REGISTRATION»(ref-451065-S16272258382012020700000) . Use the Data List to check if S code certification is functioning properly again. SMART KEY Tester Display Measurement Item/Range Normal Condition Diagnostic Note S Code Check Verification result between certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU)/OK or NG OK: Verification result normal NG: Verification result abnormal When a malfunction is present: The ID code for the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is not registered or the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started). NEXT --> END
34. GO TO STEERING LOCK SYSTEM (B2782). Refer to «DTC B2782: Power Source Control ECU Malfunction»(ref-451230-S33380247872012020700000)
35. 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-451247-S39011552272012020700000)
36. GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (IG). Refer to «Power Source Mode does not Change to ON (IG)»(ref-451247-S01046177562012020700000)
37. GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (ACC). Refer to «Power Source Mode does not Change to ON (ACC)»(ref-451247-S37117003712012020700000)
38. GO TO SFI SYSTEM (PROBLEM SYMPTOMS TABLE). Refer to «PROBLEM SYMPTOMS TABLE»(ref-451061-S17066097812012020700000)
39. GO TO SFI SYSTEM (PROBLEM SYMPTOMS TABLE). Refer to «PROBLEM SYMPTOMS TABLE»(ref-451061-S17066097812012020700000)
40. REPLACE POWER SOURCE CONTROL ECU. Refer to «REMOVAL»(ref-451224-S38850013962012020700000)
41. REPLACE STARTER ASSEMBLY. Refer to «REMOVAL»(ref-451175-S06035689612012020700000)
42. REPLACE POWER SOURCE CONTROL ECU. Refer to «REMOVAL»(ref-451224-S38850013962012020700000)
43. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-451232-S11677392442012020700000)
44. REPLACE POWER SOURCE CONTROL ECU. Refer to «REMOVAL»(ref-451224-S38850013962012020700000)
45. REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-451170-S34996445972012020700000)
46. REPLACE POWER SOURCE CONTROL ECU. Refer to «REMOVAL»(ref-451224-S38850013962012020700000)
47. REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-451186-S12977845582012020700000)
48. REPLACE POWER SOURCE CONTROL ECU. Refer to «REMOVAL»(ref-451224-S38850013962012020700000)
49. GO TO STEERING LOCK SYSTEM (UNABLE TO UNLOCK STEERING WHEEL). Refer to «Unable to Unlock Steering Wheel (Engine cannot Start)»(ref-451230-S35990146142012020700000)
50. REPLACE ID CODE BOX (IMMOBILISER CODE ECU). Refer to «REMOVAL»(ref-451232-S32596443462012020700000)

Note. When using the Techstream with the engine 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: Body Electrical / Smart Key / 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 key system 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 key system 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. After completing repairs, confirm that the problem does not reoccur.

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

Scheme 98

Scheme 99

Scheme 100

1. CHECK DTC (ALL) Using the Techstream, confirm the output of DTCs for all systems. OK No DTCs are output. NOTE: When using the Techstream with the engine 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: Body Electrical / Smart Key / Trouble Codes. Make sure that no DTCs are output. If any DTCs are output, proceed to the Diagnostic Trouble Code Chart. NG --> GO TO DTC CHART OK: Go to next step
2. CHECK WIRELESS DOOR LOCK CONTROL SYSTEM Check that the wireless lock and unlock functions operate normally. OK Wireless lock and unlock functions operate normally. HINT: If the wireless lock and unlock functions operate normally, it can be determined that some functions of the electrical key transmitter and certification ECU (smart key ECU assembly) operate normally. NG --> See step 11 OK: Go to next step
3. INSPECT SMART KEY SYSTEM Remove the battery of the electrical key transmitter. With the brake pedal (for Automatic Transaxle) or clutch pedal (for Manual Transaxle) depressed, touch the electrical key transmitter to the engine switch. Press and hold the engine switch for a maximum of 15 seconds and check if the engine can be started. OK The engine can be started. HINT: If the engine can be started, it is clear that the electrical key transmitter is not being detected properly inside the vehicle. There may be a problem with the formation of the interior detection area, a problem with the indoor electrical key antenna (reception problem), or wave interference. If the engine cannot be started, there is a problem with the engine switch, power source control ECU or a related wire harness. NG --> See step 4 OK --> See step 12
4. READ VALUE USING TECHSTREAM (START SWITCH 1, 2) Connect the Techstream to the DLC3. Turn the Techstream on. NOTE: When using the Techstream with the engine switch off, perform either of the following: 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 connect the Techstream to the vehicle and select the vehicle type under manual mode. Enter the following menus: Body Electrical / Power Source Control / Data List. According to the display on the Techstream, read the Data List. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Start Switch1 Condition of engine switch contact 1/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 Condition of engine switch contact 2/ON or OFF ON: Engine switch pressed OFF: Engine switch not pressed This is the backup for engine switch contact 1. This item behaves the same way as engine switch contact 1. OK The display changes in response to the operation of the engine switch. NG --> See step 9 OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (BATTERY - POWER SOURCE CONTROL ECU) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
6. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - BODY GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
7. CHECK POWER SOURCE CONTROL ECU Connect the power source control ECU connectors. Connect the Techstream to the DLC3. Turn the Techstream on. NOTE: When using the Techstream with the engine switch off, perform either of the following: 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 connect the Techstream to the vehicle and select the vehicle type under manual mode. Enter the following menus: Body Electrical / Power Source Control / Data List. Read the Data List and check that the display changes according to the changes in the power source mode when the engine switch is pushed. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Power Supply Condition State of power supply/IG2 ON, ST ON, All OFF, IG1 ON or ACC ON All OFF: Engine switch off (power supply 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: Cranking engine (ST request signal on) Since IG1 ON and IG2 ON turn "on" at approximately the same time, IG1 ON may not be displayed (IG1 ON turns on for a very short time). OK Display changes according to the changes in the power source mode when the engine switch is pushed. Measure the voltage according to the value(s) in the table below. TEXT IN ILLUSTRATION *a Component with harness connected (Power Source Control ECU) - - Standard Voltage Tester Connection Switch Condition Specified Condition C43-20 (IG1D) - Body ground Engine switch off 1 V or less Engine switch on (ACC)*1 Engine switch on (IG)*2 9 V or higher C42-8 (IG2D) - Body ground Engine switch off 1 V or less Engine switch on (ACC)*1 Engine switch on (IG)*2 9 V or higher C43-19 (ACCD) - Body ground Engine switch off 1 V or less Engine switch on (ACC)*1 8.5 V or higher Engine switch on (IG)*2 8.5 V or higher HINT: *1: To turn the engine switch on (ACC), carry the electrical key transmitter and press the engine switch with the shift lever in P (for Automatic Transaxle) and the brake pedal (for Automatic Transaxle) or clutch pedal (for Manual Transaxle) released. *2: To turn the engine switch on (IG), carry the electrical key transmitter and press the engine switch twice with the shift lever in P (for Automatic Transaxle) and the brake pedal (for Automatic Transaxle) or clutch pedal (for Manual Transaxle) released. NG --> See step 13 OK --> See step 8
8. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-451050-S39599463712012020700000)
9. INSPECT ENGINE SWITCH Remove the engine switch. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition 7 (SS1) - 5 (GND) Engine switch not pushed 10 kohms or higher Engine switch pushed Below 1 ohms 2 (SS2) - 5 (GND) Engine switch not pushed 10 kohms or higher Engine switch pushed Below 1 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Engine Switch) NG --> See step 14 OK: Go to next step
10. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - ENGINE SWITCH) Disconnect the C43 power source control ECU connector. Disconnect the C15 engine switch connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition C43-17 (SSW2) - C15-2 (SS2) Always Below 1 ohms C43-18 (SSW1) - C15-7 (SS1) C43-17 (SSW2) - Body ground Always 10 kohms or higher C43-18 (SSW1) - Body ground C15-5 (GND) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 15
11. GO TO SMART KEY SYSTEM (for Entry Function) (PROBLEM SYMPTOMS TABLE). Refer to «PROBLEM SYMPTOMS TABLE»(ref-451055-S31354310342012020700000)
12. GO TO SMART KEY SYSTEM (for Entry Function) (ROOM OSCILLATOR DOES NOT RECOGNIZE KEY). Refer to «Room Oscillator does not Recognize Key»(ref-451239-S03071437202012020700000)
13. REPLACE POWER SOURCE CONTROL ECU. Refer to «REMOVAL»(ref-451224-S38850013962012020700000)
14. REPLACE ENGINE SWITCH. Refer to «REMOVAL»(ref-451175-S40950436692012020700000)
15. REPLACE POWER SOURCE CONTROL ECU. Refer to «REMOVAL»(ref-451224-S38850013962012020700000)

Note. When using the Techstream with the engine 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: Body Electrical / Smart Key / 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 key system 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 key system 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. After completing repairs, confirm that the problem does not reoccur.

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

Scheme 101

1. CHECK DTC (ALL) See step 1 NG --> GO TO DTC CHART OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (BATTERY - POWER SOURCE CONTROL ECU) Disconnect the C43 power source control ECU connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition C43-1 (AM22) - Body ground Always 9.5 to 14 V TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Power Source Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
3. INSPECT INTEGRATION RELAY (IG2 RELAY) Remove the integration relay. Inspect the integration relay. Refer to «ON-VEHICLE INSPECTION»(ref-451166-S20720226562012020700000) . NG --> REPLACE INTEGRATION RELAY OK: Go to next step
4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG1 NO. 1, IG1 NO. 2 AND IG1 NO. 3 RELAYS) Disconnect the 2C and 2D instrument panel junction block assembly connectors. TEXT IN ILLUSTRATION *a Component without harness connected (Instrument Panel Junction Block Assembly) - - Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2C-26 - 2D-9 20°C (68°F) 181.82 to 272.73 ohms NG --> REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) Disconnect the C43 power source control ECU connector. Disconnect the 2C 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 C43-20 (IG1D) - 2C-26 Always Below 1 ohms C43-20 (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) Disconnect the 2D 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 2D-9 - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
7. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - INTEGRATION RELAY) Disconnect the C42 power source control ECU connector. Disconnect the 1A integration relay connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition C42-8 (IG2D) - 1A-2 Always Below 1 ohms C42-8 (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 (INTEGRATION RELAY - BODY GROUND) Disconnect the 1A integration relay connector. 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 SOURCE CONTROL ECU See step 3 NG --> See step 11 OK --> See step 10
10. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-451050-S39599463712012020700000)
11. REPLACE POWER SOURCE CONTROL ECU. Refer to «REMOVAL»(ref-451224-S38850013962012020700000)

Note. When using the Techstream with the engine 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: Body Electrical / Smart Key / 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 key system 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 key system 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. After completing repairs, confirm that the problem does not reoccur.

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS