Smart Key System (For Start Function) (Diagnostic Codes & Symptom Tests): Diagnosis Toyota Sienna III

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 128

Scheme 129

Scheme 130

1. CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU) Disconnect the D89 power management control ECU connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition D89-2 (AM21) - Body ground Always 9.5 to 14 V D89-1 (AM22) - Body ground TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Power Management 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 MANAGEMENT CONTROL ECU - BODY GROUND) Disconnect the D89 power management control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D89-6 (GND) - Body ground Always Below 1 ohms D89-5 (GND2) - Body ground TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Power Management Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. INSPECT POWER MANAGEMENT CONTROL ECU Connect the power management control ECU connectors. TEXT IN ILLUSTRATION *a Component with harness connected (Power Management Control ECU) - - Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition A35-8 (IG2D) - Body ground Engine switch off 1 V or less Engine switch on (IG)* 9 V or higher D89-20 (IG1D) - Body ground Engine switch off 1 V or less Engine switch on (IG)* 9 V or higher *: To turn the engine switch on (IG), carry the key and press the engine switch twice with the shift lever in P and the brake pedal 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 MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-494153-S13136159982012081000000)

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 131

Scheme 132

1. CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT 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 MANAGEMENT CONTROL ECU - BODY GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC RELAY) Disconnect the 2A 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 2A-36 - 2D-7 20°C (68°F) 50.63 to 123.75 ohms TEXT IN ILLUSTRATION *a Component without harness connected (instrument panel Junction Block Assembly) NG --> REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) Disconnect the 2A and 2D instrument panel junction block assembly connectors. Disconnect the D89 power management control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D89-19 (ACCD) - 2A-36 Always Below 1 ohms 2D-7 - Body ground Always Below 1 ohms D89-19 (ACCD) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. INSPECT POWER MANAGEMENT CONTROL ECU Connect the power management control ECU connectors. TEXT IN ILLUSTRATION *a Component with harness connected (Power Management Control ECU) - - Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition D89-19 (ACCD) - Body ground Engine switch off 1 V or less Engine switch on (ACC) 8.5 V or higher 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 MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-494153-S13136159982012081000000)

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 management control ECU. If there are any signs of water damage, replace the power management control ECU and take measures against the cause of the water damage.

Note. When using the Techstream with the 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 133

Scheme 134

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 (Speedometer tester) - 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 driven) appears on the screen according to the vehicle speed. NG --> See step 3 OK --> See step 8
3. CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT 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 MANAGEMENT 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 MANAGEMENT CONTROL ECU - COMBINATION METER) Disconnect the D89 power management control ECU connector. Disconnect the D18 combination meter assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D89-23 (SPD) - D18-10 (+S) Always Below 1 ohms D89-23 (SPD) or D18-10 (+S) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. INSPECT COMBINATION METER ASSEMBLY Using an oscilloscope, check the vehicle speed input signal waveform from the combination meter at the terminal of the power management control ECU. TEXT IN ILLUSTRATION *a Component with harness connected (Power Management Control ECU) - - Check the signal waveform according to the condition(s) in the table below. Standard Frequency Tester Connection Tool Setting Condition Specified Condition D89-23 (SPD) - Body ground 5 V/DIV., 10 ms./DIV. Engine switch on (IG), vehicle being driven at approx. 5 km/h (3 mph) Correct waveform is as shown in illustration (Scheme 134) NG --> See step 9 OK --> See step 10
7. GO TO METER/GAUGE SYSTEM (SPEED SIGNAL CIRCUIT). Refer to «Speed Signal Circuit»(ref-494136-S29282588552012081000000)
8. GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-494140-S28547449322012081000000)
9. GO TO METER/GAUGE SYSTEM (SPEED SIGNAL CIRCUIT). Refer to «Speed Signal Circuit»(ref-494136-S29282588552012081000000)
10. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-494153-S13136159982012081000000)

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 135

1. READ VALUE USING TECHSTREAM (STOP LIGHT 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 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) or OFF (brake pedal released) appears 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 MANAGEMENT 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 MANAGEMENT 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 MANAGEMENT CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY) Disconnect the A35 power management control ECU connector. Disconnect the A2 stop light switch assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A35-11 (STP1) - A2-1 Always Below 1 ohms A35-11 (STP1) or A2-1 - Body ground Always 10 kohms or higher Reconnect the A2 stop light switch assembly connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A35-11 (STP1) - Body ground Brake pedal not depressed Below 1 V Brake pedal depressed ([Voltage at terminal AM21 or AM22] minus 2.0 V) or higher TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Power Management 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-493954-S41196399182012081000000)
6. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-494153-S13136159982012081000000)

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 136

1. CHECK FOR DTC (LIN COMMUNICATION SYSTEM) Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-494214-S19665103272012081000000) . 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 lock 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 lock unlocked*1 OFF: Steering lock locked*2 When the shift lever is in P and the engine switch is off, if any door is opened or closed, the steering lock is locked. When the key is inside the vehicle and the engine switch is turned on (ACC) or on (IG), the steering lock 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 key is inside the vehicle and the engine switch is turned on (ACC) or on (IG), the steering lock unlocks. *2: When the shift lever is in P and the engine switch is off, if any door is opened or closed, the steering lock 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 MANAGEMENT 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 MANAGEMENT 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 management control ECU from the steering lock actuator assembly to identify the steering lock position. Standard Resistance Tester Connection Condition Specified Condition Positive (+) tester probe --> D29-4 (SLP1) Negative (-) tester probe --> Body ground Steering lock locked*1 10 kohms or higher Positive (+) tester probe --> D29-4 (SLP1) Negative (-) tester probe --> Body ground Steering lock unlocked*2 Below 1 ohms HINT: *1: When the key is inside the vehicle and the engine switch is turned on (ACC) or on (IG), the steering lock unlocks. *2: When the shift lever is in P and the engine switch is off, if any door is opened or closed, the steering lock 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 MANAGEMENT CONTROL ECU - STEERING LOCK ECU) Disconnect the D89 power management control ECU connector. Disconnect the D29 steering lock ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D89-3 (SLP) - D29-4 (SLP1) Always Below 1 ohms D89-3 (SLP) or D29-4 (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-494217-S23575932982012081000000)
8. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-494153-S13136159982012081000000)
9. REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU). Refer to «DISASSEMBLY»(ref-493944-S14548406612012081000000)

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. If P0335 is output together with P2286, perform inspections and repairs for P0335 first.

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

Scheme 137

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 ON (engine stopped) or OFF (engine running) appears on the screen according to the engine condition. NG --> See step 2 OK --> See step 6
2. CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT 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 MANAGEMENT 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 MANAGEMENT CONTROL ECU - ECM) Disconnect the A35 power management control ECU connector. Disconnect the A39 ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A35-4 (NE) - A39-7 (NEO) Always Below 1 ohms A35-4 (NE) or A39-7 (NEO) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. INSPECT POWER MANAGEMENT CONTROL ECU Reconnect the power management control ECU connectors. TEXT IN ILLUSTRATION *a Component with harness connected (Power Management Control ECU) - - Check the engine speed input signal waveform at the terminal of the power management control ECU. Standard Frequency Tester Connection Condition Specified Condition A35-4 (NE) - Body ground Engine stopped No pulse generated Engine running Pulse generated (1000 RPM: 200 Hz) 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-493954-S41196399182012081000000)
7. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-494153-S13136159982012081000000)
8. GO TO SFI SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-493954-S41196399182012081000000)

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, 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 lock is unlocked by turning the steering wheel to the left and right before starting the engine. If the steering lock is locked for any reason, open and close a door with the engine switch off, and then unlock the steering lock by pressing the engine switch. This prevents the engine from starting while the steering lock is locked. After completing repairs, confirm that the problem does not occur.

HINT

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 138

Scheme 139

Scheme 140

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 Read the value using the Techstream (Power Supply Open). 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 management control ECU (open circuit) (DTC B2782 stored)/NG (PAST) or OK NG (PAST): Record of malfunction (open circuit) exists OK: No record of malfunction (open circuit) This item records malfunctions in the circuit between the power management 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 has not occurred in past A DTCs are output (except DTC B2782) B Power supply open has occurred in past and/or DTC B2782 is output C B --> See step 28 C --> See step 29 A: Go to next step
3. CHECK ENGINE SWITCH CONDITION When the key is inside the vehicle and the shift lever is in P, push the engine switch with the brake pedal 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 30 C --> See step 31 D --> See step 32 A: Go to next step
4. CHECK CRANKING FUNCTION Get into the vehicle while carrying the key. Move the shift lever to P. Depress the brake pedal. 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 not initial combustion B Engine cranks, but is difficult to start C B --> See step 33 C --> See step 34 A: Go to next step
5. CHECK SECURITY INDICATOR LIGHT (ENGINE IMMOBILISER SYSTEM UNSET) Get into the vehicle while carrying the key, move the shift lever to P, press the engine switch while not depressing the brake pedal 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 key, move the shift lever to P, press the engine switch while depressing the brake pedal 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 can be considered to be normal. NG --> See step 16 OK: 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 key, move the shift lever to P, press the engine switch while depressing the brake pedal and confirm that the Data List item changes. STARTING CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Starter SW Power management control ECU starter activation command/ON or OFF ON: Starter on OFF: Starter off When there is a malfunction, the engine cannot be cranked. OK The Data List item changes. NG --> See step 35 OK: Go to next step
8. INSPECT ST RELAY Remove the ST relay from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 3 - 5 Battery voltage not applied 10 kohms or higher Battery voltage applied to terminals 1 and 2 Below 1 ohms Reinstall the ST relay to the engine room relay block. NG --> REPLACE ST RELAY OK: Go to next step
9. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) Disconnect the A35 power management control ECU 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 A35-3 (STAR) - Body ground 20°C (68°F) 93.8 to 136.4 ohms A35-2 (STA) - Body ground TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Power Management 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-494148-S30725378612012081000000) . NG --> See step 36 OK: Go to next step
11. CHECK HARNESS AND CONNECTOR (BATTERY - STARTER AND ENGINE ROOM RELAY BLOCK) Remove the starter assembly from the vehicle to perform an inspection. Remove the ST relay 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 h1-1 - 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 - B6-1 Always Below 1 ohms 3 or B6-1 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 37
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 NG or OK OK: Verification result normal NG: Verification result abnormal When a malfunction is present: The ID code for the certification ECU is not registered or the certification ECU is malfunctioning. The steering lock cannot be locked. The steering lock cannot be unlocked (the engine cannot be started). OK OK (S code certification result normal) appears on the screen. NG --> See step 22 OK: Go to next step
13. CHECK STEERING LOCK Check that the steering lock unlocks when the engine switch is turned on (ACC). OK The steering lock 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. 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/ 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 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. If this item displays "Set", the certification 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 27 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 key with shift lever in P and brake pedal 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 38 OK --> END
16. 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 / Smart Key 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. The engine cannot be started when this item is "OFF". Neutral SW/ Clutch SW Shift position (P, N) /ON or OFF ON: Shift lever in P or N OFF: Shift lever not in P or N Use this item to help determine if the park/neutral position switch 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/ON or OFF ON: Shift lever in P or N OFF: Shift lever not in P or N When there is a malfunction, the engine cannot be cranked. OK The item in the Data List changes according 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. 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 Stop light switch 1/ON or OFF ON: Brake pedal depressed OFF: Brake pedal released - OK The item in the Data List changes when the brake pedal is depressed and released. NG --> See step 20 OK --> See step 39
18. INSPECT PARK/NEUTRAL POSITION SWITCH Disconnect the B3 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) - 5 (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 40 OK: Go to next step
19. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - PARK/NEUTRAL POSITION SWITCH) Disconnect the A35 power management control ECU connector. Disconnect the B3 park/neutral position switch connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A35-3 (STAR) - B3-4 (B) Always Below 1 ohms A35-3 (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 A35-3 (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 more* --> 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 41
20. INSPECT STOP LIGHT SWITCH ASSEMBLY Disconnect the A2 stop light switch connector. Inspect the stop light switch assembly. Refer to «INSPECTION»(ref-494137-S14512341712012081000000) . NG --> See step 42 OK: Go to next step
21. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY) See step 4 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 43
22. REPLACE CERTIFICATION ECU Replace the certification ECU with a new one. Refer to «REMOVAL»(ref-494218-S04864852422012081000000) . Perform the registration procedures. Refer to «REGISTRATION»(ref-493965-S03850298592012081000000) . 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/NG or OK OK: Verification result normal NG: Verification result abnormal When a malfunction is present: The ID code for the certification ECU is not registered or the certification ECU is malfunctioning. The steering lock cannot be locked. The steering lock cannot be unlocked (the engine cannot be started). NEXT --> END
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. 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 lock unlocked OFF: Steering lock locked When the shift lever is in P and the engine switch is off, if any door is opened or closed, the steering lock is locked. When the key is inside the vehicle and the engine switch is turned on (ACC) or on (IG), the steering lock unlocks. The engine cannot be started when the steering unlock signal is off. OK The item in the Data List indicates "OFF" (the steering lock is locked). NG --> See step 24 OK --> See step 44
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. 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 and steering lock actuator assembly/NG or OK OK: Verification result normal NG: Verification result abnormal When a malfunction is present: The ID code for the certification ECU or steering lock actuator assembly is not registered or the certification ECU or steering lock actuator is malfunctioning. The steering lock cannot be locked. The steering lock cannot be unlocked (the engine cannot be started). OK The Data List item changes to "OK" when the key is inside the vehicle. HINT: Reasons for verification failure: The steering lock ECU or certification 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 26 OK: Go to next step
25. INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) See step 5 NEXT --> END
26. REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) Replace the steering lock actuator assembly (steering lock ECU) with a new one. Refer to «REGISTRATION»(ref-493965-S03850298592012081000000) . Perform the registration procedures. Refer to «DISASSEMBLY»(ref-493944-S14548406612012081000000) . 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 certification ECU and steering lock actuator assembly/NG or OK OK: Verification result normal NG: Verification result abnormal When a malfunction is present: The ID code for the certification ECU or steering lock actuator assembly is not registered or the certification ECU or steering lock actuator is malfunctioning. The steering lock cannot be locked. The steering lock cannot be unlocked (the engine cannot be started). OK OK (L code certification result normal) appears on the screen. NG --> See step 27 OK --> END
27. REPLACE CERTIFICATION ECU Replace the certification ECU with a new one. Refer to «REGISTRATION»(ref-493965-S03850298592012081000000) . Perform the registration procedures. Refer to «REMOVAL»(ref-494218-S04864852422012081000000) . 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/NG or OK OK: Verification result normal NG: Verification result abnormal When a malfunction is present: The ID code for the certification ECU is not registered or the certification ECU is malfunctioning. The steering lock cannot be locked. The steering lock cannot be unlocked (the engine cannot be started). NEXT --> END
28. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-494149-S21060294592012081000000)
29. GO TO STEERING LOCK SYSTEM (B2782). Refer to «DTC B2782: Power Source Control ECU Malfunction»(ref-494216-S12619441112012081000000)
30. 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-494257-S12161993442012081000000)
31. GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (IG). Refer to «Power Source Mode does not Change to ON (IG)»(ref-494257-S28163232052012081000000)
32. GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (ACC). Refer to «Power Source Mode does not Change to ON (ACC)»(ref-494257-S34686111502012081000000)
33. GO TO SFI SYSTEM (PROBLEM SYMPTOMS TABLE). Refer to «PROBLEM SYMPTOMS TABLE»(ref-493954-S08606703632012081000000)
34. GO TO SFI SYSTEM (PROBLEM SYMPTOMS TABLE). Refer to «PROBLEM SYMPTOMS TABLE»(ref-493954-S08606703632012081000000)
35. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «INSTALLATION»(ref-494153-S21025827992012081000000)
36. REPLACE STARTER ASSEMBLY. Refer to «REMOVAL»(ref-494148-S04700750502012081000000)
37. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-494153-S13136159982012081000000)
38. REPLACE CERTIFICATION ECU. Refer to «REMOVAL»(ref-494218-S04864852422012081000000)
39. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-494153-S13136159982012081000000)
40. REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-494119-S35336432442012081000000)
41. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-494153-S13136159982012081000000)
42. REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-494137-S27467361812012081000000)
43. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-494153-S13136159982012081000000)
44. GO TO STEERING LOCK SYSTEM (UNABLE TO UNLOCK STEERING WHEEL). Refer to «Unable to Unlock Steering Wheel (Engine cannot Start)»(ref-494216-S17445418152012081000000)

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 occur.

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

Scheme 141

Scheme 142

Scheme 143

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 --> See step 17 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 key and certification ECU operate normally. NG --> See step 11 OK: Go to next step
3. CHECK SMART KEY SYSTEM Remove the battery of the electrical key transmitter. With the brake pedal depressed, touch the key to the engine switch. Depress 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 key 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 management 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 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. 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 1. Behaves the same way as engine switch 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 MANAGEMENT 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 MANAGEMENT CONTROL ECU - BODY GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
7. INSPECT POWER MANAGEMENT CONTROL ECU Connect the Techstream to the DLC3. Turn the Techstream on. NOTE: When using the Techstream with the engine switch off, perform 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. 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, IG2 ON may not be displayed. 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 Management Control ECU) - - Standard Voltage Tester Connection Switch Condition Specified Condition D89-20 (IG1D) - Body ground Engine switch off 1 V or less Engine switch on (ACC)*1 Engine switch on (IG)*2 9 V or higher A35-8 (IG2D) - Body ground Engine switch off 1 V or less Engine switch on (ACC)*1 Engine switch on (IG)*2 9 V or higher D89-19 (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 key and press the engine switch with the shift lever in P and the brake pedal released. *2: To turn the engine switch on (IG), carry the key and press the engine switch twice with the shift lever in P and the brake pedal released. NG --> See step 13 OK: Go to next step
8. CONFIRMATION TEST Check that the power source mode changes to on (ACC) and on (IG) when operating the engine switch. OK The power source mode changes to on (ACC) and on (IG) in response to the operation of the engine switch. NG --> CHECK RELAY CONTACT CIRCUIT OK --> See step 14
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 15 OK: Go to next step
10. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - ENGINE SWITCH) Disconnect the D89 power management control ECU connector. Disconnect the D33 engine switch connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D89-17 (SSW2) - D33-2 (SS2) Always Below 1 ohms D89-18 (SSW1) - D33-7 (SS1) D89-17 (SSW2) - Body ground Always 10 kohms or higher D89-18 (SSW1) - Body ground D33-5 (GND) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 16
11. SMART KEY SYSTEM (for Entry Function) (PROBLEM SYMPTOMS TABLE). Refer to «PROBLEM SYMPTOMS TABLE»(ref-494215-S07100882912012081000000)
12. GO TO SMART KEY SYSTEM (for Entry Function) (ROOM OSCILLATOR DOES NOT RECOGNIZE KEY). Refer to «Room Oscillator does not Recognize Key»(ref-494249-S23576851842012081000000)
13. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-494153-S13136159982012081000000)
14. SYSTEM RETURNED TO NORMAL (PROBLEM OCCURRED DUE TO BAD CONNECTION, BUT RETURNED TO NORMAL BY RECONNECTING CONNECTOR). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-493943-S22682551262012081000000)
15. REPLACE ENGINE SWITCH. Refer to «REMOVAL»(ref-494148-S05302566992012081000000)
16. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-494153-S13136159982012081000000)
17. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-494149-S21060294592012081000000)

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 DIAGNOSTIC TROUBLE CODE CHART . 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 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 occur.

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

Scheme 144

Scheme 145

1. CHECK DTC (ALL) See step 1 NG --> See step 11 OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU) Disconnect the D89 power management control ECU connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition D89-1 (AM22) - Body ground Always 9.5 to 14 V TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Power Management Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
3. INSPECT IG2 RELAY Remove the IG2 relay from the engine room relay block. Inspect IG2 relay. Refer to «ON-VEHICLE INSPECTION»(ref-493957-S30986065802012081000000) . NG --> REPLACE IG2 RELAY 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 RELAYS) Disconnect the 2A 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 2A-16 - 2D-7 20°C (68°F) 50.63 to 123.75 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Instrument Panel Junction Block Assembly) NG --> REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) Disconnect the D89 power management control ECU connector. Disconnect the 2A instrument panel block assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D89-20 (IG1D) - 2A-16 Always Below 1 ohms D89-20 (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-7 - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
7. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - IG2 RELAY) Disconnect the A35 power management control ECU connector. Remove the IG2 relay from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A35-8 (IG2D) - 1 (IG2 relay terminal) Always Below 1 ohms A35-8 (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 (IG2 RELAY - BODY GROUND) Remove the IG2 relay from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2 (IG2 relay terminal) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *a Component without relay connected (IG2 Relay Terminal) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
9. INSPECT POWER MANAGEMENT CONTROL ECU See step 3 NG --> See step 12 OK: Go to next step
10. CONFIRMATION TEST See step 8 NG --> CHECK RELAY CONTACT CIRCUIT OK --> SYSTEM RETURNED TO NORMAL (PROBLEM OCCURRED DUE TO BAD CONNECTION, BUT RETURNED TO NORMAL BY RECONNECTING CONNECTOR)
11. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-494149-S21060294592012081000000)
12. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-494153-S13136159982012081000000)

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 DIAGNOSTIC TROUBLE CODE CHART . 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 occur.

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS