Smart Key System (start Function) (diagnostic Codes & Symptom Tests) Toyota Prius C I

DESCRIPTION

This DTC is stored when a malfunction in the IG1 circuit, IG2 circuit or IG hold circuit in the power management control ECU is detected.

HINT

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

1. *: Only detected while a malfunction is present and the power switch is on (IG)

HINT

1. The IG1 and IG2 circuits activate the IG1 and IG2 relays.
2. After the IG1 and IG2 circuits turn on, even if the CPU operates incorrectly, the IG hold circuit maintains the power source mode in on (IG).

VEHICLE CONDITION AND FAIL-SAFE FUNCTION WHEN MALFUNCTION DETECTED

Scheme 29

INSPECTION PROCEDURE

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / DTC. for Smart Key: Body Electrical / Smart Key / DTC. The smart key system (for Start Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. 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 30

Scheme 31

Scheme 32

1. CHECK HARNESS AND CONNECTOR (POWER SOURCE) Disconnect the G57 and G58 connector from the power management control ECU. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition G57-1 (AM22) - Body ground Power switch off 11 to 14 V G58-7 (AM21) - Body ground Power switch off 11 to 14 V TEXT IN ILLUSTRATION *a Front 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 (GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition G57-5 (E01) - Body ground Always Below 1 ohms G57-6 (E1) - Body ground Always Below 1 ohms G58-5 (E02) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Power Management Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK POWER MANAGEMENT CONTROL ECU Reconnect the G57 and G58 power management control ECU connectors. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A39-2 (IG2D) - Body ground Power switch on (ACC) --> Power switch on (IG) 1 V or less --> 9 V or higher G58-2 (IG1D) - Body ground Power switch on (ACC) --> Power switch on (IG) 1 V or less --> 9 V or higher TEXT IN ILLUSTRATION *a Component with harness connected (to Power Management Control ECU) NG --> See step 4 OK --> See step 5
4. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/body-electrical/#power-distribution-service-information)
5. END (USE SIMULATION METHOD TO CHECK). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-c/i-2011-2015/remont/hoistjack/#introduction)

This DTC is stored when a malfunction in the ACC output circuit is detected. The ACC output circuit is the circuit that goes from the ACC output terminal of the power management control ECU to the ACC relay.

HINT

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

1. *: Only detected while a malfunction is present.

VEHICLE CONDITION AND FAIL-SAFE FUNCTION WHEN MALFUNCTION DETECTED

Scheme 33

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / DTC. for Smart Key: Body Electrical / Smart Key / DTC. The smart key system (for Start Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. 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 34

Scheme 35

1. CHECK HARNESS AND CONNECTOR (POWER SOURCE) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) Disconnect the G58 connector from the power management control ECU. Disconnect the 3B connector from the instrument panel junction block assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition G58-1 (ACCD) - 3B-37 Always Below 1 ohms 3B-8 - Body ground Always Below 1 ohms G58-1 (ACCD) or 3B-37 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC RELAY) Remove the instrument panel junction block assembly. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/body-electrical/#power-distribution-service-information) . TEXT IN ILLUSTRATION *a Component without harness connected (Instrument Panel Junction Block Assembly) - - Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/body-electrical/#power-distribution-service-information) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 3E-1 - MB-29 Auxiliary battery voltage not applied to terminals 3B-37 and 3B-8 10 kohms or higher Auxiliary battery voltage applied to terminals 3B-37 and 3B-8 Below 1 ohms NG --> REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OK: Go to next step
5. INSPECT POWER MANAGEMENT CONTROL ECU Reconnect the G58 power management control ECU connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition G58-1 (ACCD) - Body ground Power switch off --> Power switch on (ACC) 1 V or less --> 8.5 V or higher TEXT IN ILLUSTRATION *a Component with harness connected (Power Management Control ECU) NG --> See step 6 OK --> See step 7
6. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/body-electrical/#power-distribution-service-information)
7. END (USE SIMULATION METHOD TO CHECK). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-c/i-2011-2015/remont/hoistjack/#introduction)

This DTC is stored when a malfunction is detected in the starter circuit inside the power management control ECU.

HINT

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

1. *: Only detected while a malfunction is present.

VEHICLE CONDITION AND FAIL-SAFE FUNCTION WHEN MALFUNCTION DETECTED

Scheme 36

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / DTC. for Smart Key: Body Electrical / Smart Key / DTC. The smart key system (for Start Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. 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

PROCEDURE

1. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-c/i-2011-2015/remont/starter/#smart-key-system-for-start-function-diagnostics-introduction__dtc-check-clear) . Turn the power switch on (IG). After 25 seconds have elapsed, check if the DTC has been set again. OK DTC B2285 is not output. NG --> GO TO DTC CHART (DTC B2285) OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (POWER SOURCE) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 4
4. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/body-electrical/#power-distribution-service-information)

This DTC is stored when a malfunction in the water submersion detection circuit in the power management control ECU is detected.

HINT

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

1. *: Only detected while a malfunction is present.

VEHICLE CONDITION AND FAIL-SAFE FUNCTION WHEN MALFUNCTION DETECTED

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / DTC. for Smart Key: Body Electrical / Smart Key / DTC. The smart key system (for Start Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. 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.

1. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-c/i-2011-2015/remont/starter/#smart-key-system-for-start-function-diagnostics-introduction__dtc-check-clear) . Turn the power switch on (IG). After 330 seconds have elapsed, check if the DTC has been output again. OK DTC B2277 is not output HINT: If there are any signs that water was present, before replacing the power management control ECU, take measures to prevent any further water entry. NG --> See step 2 OK --> See step 3
2. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/body-electrical/#power-distribution-service-information)
3. END (USE SIMULATION METHOD TO CHECK). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-c/i-2011-2015/remont/hoistjack/#introduction)

DTC B2282 is stored when the vehicle speed signal sent by the combination meter assembly via direct line and the vehicle speed signal sent via CAN communication do not match.

DTC B2283 is stored when a malfunction in the vehicle speed sensor is detected.

HINT

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

1. *: Only detected while a malfunction is present and the power switch is on (IG)

VEHICLE CONDITION AND FAIL-SAFE FUNCTION WHEN MALFUNCTION DETECTED

Scheme 37

HINT

1. A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter. The signal is changed to a pulse signal at the transistor in the combination meter. Each ECU controls the respective system based on the pulse signal.
2. If a short occurs in an ECU, all systems in the diagram above will not operate normally.

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / DTC. for Smart Key: Body Electrical / Smart Key / DTC. The smart key system (for Start Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. 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 38

1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Combination Meter / Data List. Check the Data List for proper functioning of the vehicle speed signal. COMBINATION METER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Vehicle Speed Meter Vehicle speed/Min.: 0, Max.: 255 Almost same as actual vehicle speed (Speedometer tester) - OK Vehicle speed displayed on the Techstream is almost the same as the actual vehicle speed measured using a speedometer tester (calibrated chassis dynamometer). NG --> See step 9 OK: Go to next step
2. READ VALUE USING TECHSTREAM Enter the following menus: Body Electrical / Power Source Control / Data List. Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Vehicle speed signal Vehicle being driven or stopped/Stop or Run Stop: Vehicle stopped Run: Vehicle being driven at 5 km/h (3 mph) or more - OK Stop (vehicle is stopped) and Run (vehicle is running) appear on the screen. NG --> See step 3 OK --> See step 10
3. CHECK HARNESS AND CONNECTOR (POWER SOURCE) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - COMBINATION METER ASSEMBLY) Disconnect the G57 connector from the power management control ECU. Disconnect the G1 connector from the combination meter assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition G57-14 (SPDI) - G1-39 (+S) Always Below 1 ohms G57-14 (SPDI) or G1-39 (+S) - Body ground Always 10 kohms or higher NG --> See step 7 OK: Go to next step
6. CHECK POWER MANAGEMENT CONTROL ECU Reconnect the G57 power management control ECU connector. Reconnect the G1 combination meter assembly connector. Connect an oscilloscope to terminal G57-14 (SPDI) and G57-6 (E1). Turn the power switch on (IG). Check the signal waveform according to the condition(s) in the table below. Item Condition Tester Connection G57-14 (SPDI) - G57-6 (E1) Tool setting 5 V/DIV., 20 ms./DIV. Vehicle condition Power switch on (IG), vehicle being driven at approx. 5 km/h (3 mph) OK The waveform is similar to that shown in the illustration. HINT: The wavelength becomes shorter as the vehicle speed increases. TEXT IN ILLUSTRATION *a Component with harness connected (Power Management Control ECU) NG --> See step 11 OK --> See step 12
7. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - JUNCTION CONNECTOR) Disconnect the 3B junction connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition G1-39 (+S) - 3B-15 Always Below 1 ohms G1-39 (+S) or 3B-15 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
8. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - JUNCTION CONNECTOR) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition G57-14 (SPDI) - 3A-37 Always Below 1 ohms G57-14 (SPDI) or 3A-37 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE JUNCTION CONNECTOR
9. GO TO METER / GAUGE SYSTEM (Speedometer Malfunction). Refer to «Speedometer Malfunction»(/toyota/prius-c/i-2011-2015/remont/gauges-instrument-panels/#meter-gauge-system-diagnostic-codes-symptom-tests)
10. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/body-electrical/#power-distribution-service-information)
11. GO TO METER / GAUGE SYSTEM (Speed Signal Circuit). Refer to «Speed Signal Circuit»(/toyota/prius-c/i-2011-2015/remont/gauges-instrument-panels/#meter-gauge-system-diagnostic-codes-symptom-tests)
12. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/body-electrical/#power-distribution-service-information)

This DTC is stored when the brake signal sent via direct line and the brake signal sent via CAN communication do not match.

HINT

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

1. *: Only detected while a malfunction is present and the power switch is on (IG)

VEHICLE CONDITION AND FAIL-SAFE FUNCTION WHEN MALFUNCTION DETECTED

Scheme 39

HINT

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

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / DTC. for Smart Key: Body Electrical / Smart Key / DTC. The smart key system (for Start Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. 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 40

1. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH ASSEMBLY) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Power Source Control / Data List. Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Specified Condition Stop Light Switch1 Stop light switch1/ON or OFF ON: Brake pedal depressed OFF: Brake pedal released Use this item to determine whether the stop light switch is malfunctioning. The hybrid control system cannot be started when this item is OFF. When this item is malfunctioning, the hybrid control system can be started by pressing and holding the power switch for a certain period of time. OK ON (brake pedal is depressed) and OFF (brake pedal is released) appear on the screen. NG --> See step 2 OK --> See step 5
2. CHECK HARNESS AND CONNECTOR (POWER SOURCE) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY) Disconnect the A32 connector from the stop light switch assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A39-23 (STP) - A32-3 (L) Always Below 1 ohms A39-23 (STP) or A32-3 (L) - Body ground Always 10 kohms or higher Reconnect the A32 stop light switch assembly connector. Disconnect the A39 connector from the power management control ECU. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A39-23 (STP) - Body ground Brake pedal released 1 V or less Brake pedal depressed 9 V or higher TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Power Management Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 6
5. GO TO BRAKE CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-c/i-2011-2015/remont/anti-locktraction-control/#electronically-controlled-brake-system-diagnostics-introduction__how-to-proceed-with-troubleshooting)
6. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/body-electrical/#power-distribution-service-information)

This DTC is stored when the steering lock position signal sent by the steering lock ECU (steering lock actuator assembly) via direct line and the steering lock position signal sent via LIN communication do not match.

HINT

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

1. *: Only detected while a malfunction is present and the power switch is on (IG)

VEHICLE CONDITION AND FAIL-SAFE FUNCTION WHEN MALFUNCTION DETECTED

Scheme 41

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / DTC. for Smart Key: Body Electrical / Smart Key / DTC. The smart key system (for Start Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. Before replacing the steering lock ECU (steering lock actuator assembly), refer to the smart key system (for Start Function) precaution. Refer to PRECAUTION . Inspect the fuses of circuits related to this system before performing the following inspection procedure. After 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 42

1. CHECK FOR DTC (LIN COMMUNICATION SYSTEM) Check for DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-c/i-2011-2015/remont/communication-devices/#lin-communication-system-diagnostics-introduction__dtc-check-clear) . OK LIN communication system DTC B2785 is not output simultaneously. HINT: If the steering wheel cannot be locked or unlocked, the power switch cannot be turned on (IG) and the hybrid control system cannot be started. If LIN communication is not available, the steering wheel 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 power 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 and the power switch is off, if any door is opened or closed, the steering is locked. When the electrical key transmitter sub-assembly is inside the vehicle and the power switch is turned on (ACC) or on (IG), the steering unlocks. The hybrid control system cannot be started when the steering unlock signal is off. Result Result Proceed to Data List item does not change A Data List item changes B B --> See step 9 A: Go to next step
3. CHECK HARNESS AND CONNECTOR (POWER SOURCE) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Positive (+) tester probe --> G50-4 (SLP1) Negative (-) tester probe --> Body ground Steering locked* 10 kohms or higher Steering unlocked* Below 1 ohms HINT: *: If any of the doors are opened then closed with the shift lever in P and the power switch off, the steering wheel will be locked. If the power switch is then turned on (ACC) or on (IG), the steering wheel will be unlocked. DTC B2285 may be stored due to a malfunction in the steering lock ECU (steering lock actuator assembly). The steering lock position signal and unlock position signal are sent from the steering lock ECU (steering lock actuator assembly) to the power management control ECU individually. TEXT IN ILLUSTRATION *a Component with harness connected (Steering Lock ECU (Steering Lock Actuator Assembly)) NG --> See step 9 OK: Go to next step
6. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Disconnect the G58 connector from the power management control ECU. Disconnect the G50 connector from the steering lock ECU (steering lock actuator assembly). Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition G58-16 (SLP) - G50-4 (SLP1) Always Below 1 ohms G58-16 (SLP) or G50-4 (SLP1) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 8
7. GO TO DTC B2785. Refer to «DTC B2785: Communication Malfunction between ECUs Connected by LIN»(/toyota/prius-c/i-2011-2015/remont/communication-devices/#lin-communication-system-diagnostic-codes-b126a-b278c)
8. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/body-electrical/#power-distribution-service-information)
9. REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY). Refer to «DISASSEMBLY»(/toyota/prius-c/i-2011-2015/remont/steering-column/#steering-column-service-information)

This DTC is stored when a malfunction is detected in the READY signal circuit inside the power management control ECU.

HINT

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

1. *: Only detected while a malfunction is present and the power switch is on (IG)

VEHICLE CONDITION AND FAIL-SAFE FUNCTION WHEN MALFUNCTION DETECTED

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / DTC. for Smart Key: Body Electrical / Smart Key / DTC. The smart key system (for Start Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. 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

1. CHECK HARNESS AND CONNECTOR (POWER SOURCE) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-c/i-2011-2015/remont/starter/#smart-key-system-for-start-function-diagnostics-introduction__dtc-check-clear) . Turn the power switch on (IG). After 25 seconds have elapsed, check if the DTC has been output again. OK DTC B2286 is not output NG --> See step 4 OK --> See step 5
4. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/body-electrical/#power-distribution-service-information)
5. END (USE SIMULATION METHOD TO CHECK). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-c/i-2011-2015/remont/hoistjack/#introduction)

These DTCs are stored when there is a CAN communication error between the power management control ECU and the certification ECU (smart key ECU assembly).

HINT

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

1. *: Only detected while a malfunction is present and the power switch is on (IG)

VEHICLE CONDITION AND FAIL-SAFE FUNCTION WHEN MALFUNCTION DETECTED

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / DTC. for Smart Key: Body Electrical / Smart Key / DTC. 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

1. CHECK FOR DTC Note any DTCs that are output. Refer to «DTC CHECK / CLEAR»(/toyota/prius-c/i-2011-2015/remont/starter/#smart-key-system-for-start-function-diagnostics-introduction__dtc-check-clear) . NEXT --> See step 2
2. GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-c/i-2011-2015/remont/communication-devices/#can-communication-system-diagnostics-introduction)

This DTC is stored when the power management control ECU detects a CAN communication error inside the power management control ECU (power control section - HV control section).

HINT

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

1. *: Only detected while a malfunction is present.

VEHICLE CONDITION AND FAIL-SAFE FUNCTION WHEN MALFUNCTION DETECTED

Scheme 43

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / DTC. for Smart Key: Body Electrical / Smart Key / DTC. The smart key system (for Start Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. Inspect the fuses for circuits related to this system before performing the following inspection procedure. After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

1. CHECK HARNESS AND CONNECTOR (POWER SOURCE) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-c/i-2011-2015/remont/starter/#smart-key-system-for-start-function-diagnostics-introduction__dtc-check-clear) . Check for DTCs again. OK DTC U0293 is not output NG --> See step 4 OK --> See step 5
4. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/body-electrical/#power-distribution-service-information)
5. END (USE SIMULATION METHOD TO CHECK). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-c/i-2011-2015/remont/hoistjack/#introduction)

If any of the following operations are performed, the power management control ECU receives a signal, and changes the power source mode.

1. With the electrical key transmitter sub-assembly in the cabin, the power switch is pressed.
2. When the auxiliary battery of the electrical key transmitter sub-assembly is depleted, the brake pedal is depressed and the electrical key transmitter sub-assembly is held near the power switch.
3. When the smart key system cancel function has been canceled on the customization menu, the brake pedal is depressed and the electrical key transmitter sub-assembly is held near the power switch.

HINT

1. When the cable is disconnected and reconnected to the negative (-) battery terminal, the power source mode returns to the state it was in before the cable was disconnected.
2. If the room oscillator does not recognize the key, the cause of the malfunction may be stored in the certification ECU (smart key ECU assembly). Refer to «OPERATION HISTORY LIST»(/toyota/prius-c/i-2011-2015/remont/door-locks-anti-theft-systems/#smart-key-system-for-entry-function-diagnostic-codes-symptom-tests__operation-history-list) .
3. If the cause of the malfunction is stored in the certification ECU (smart key ECU assembly), the following table is helpful in checking whether or not the malfunction was caused by wave interference.

RADIO WAVE INTERFERENCE

Scheme 44

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / DTC. for Smart Key: Body Electrical / Smart Key / DTC. The smart key system (for Start Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. Before replacing the electrical key transmitter sub-assembly, refer to the smart key system (for Start Function) precaution. Refer to PRECAUTION . Make sure that no DTCs are output. If any DTCs are output, proceed to the Diagnostic Trouble Code Chart. Refer to DTC CHECK / CLEAR . 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 45

Scheme 46

Scheme 47

1. CHECK WIRELESS DOOR LOCK CONTROL SYSTEM Check the wireless door lock function by operating the electrical key transmitter sub-assembly. OK Wireless door lock function operates. NG --> See step 17 OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (POWER SOURCE) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK SMART KEY SYSTEM Remove the transmitter battery from the electrical key transmitter sub-assembly. Refer to «REPLACEMENT»(/toyota/prius-c/i-2011-2015/remont/door-locks-anti-theft-systems/#transmitter-battery-with-smart-key-service-information) . With the brake pedal depressed, hold the electrical key transmitter sub-assembly near the power switch and check if the power source mode changes. OK The power source mode changes. HINT: If the power source mode changes, the cabin verification is malfunctioning. Result Result Proceed to The power source mode does not change. A The power source mode changes. B TEXT IN ILLUSTRATION *1 Power Switch *2 Electrical Key Transmitter Sub-assembly B --> See step 8 A: Go to next step
5. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the Techstream on. Enter the following menus: Body Electrical / Power Source Control / Data List. Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Specified Condition Stop Light Switch1 State of brake pedal/ON or OFF ON: Brake pedal depressed OFF: Brake pedal released Use this item to determine whether the stop light switch is malfunctioning. The hybrid control system cannot be started when this item is OFF. When this item is malfunctioning, the hybrid control system can be started by pressing and holding the power switch for a certain period of time. OK ON (brake pedal is depressed) and OFF (brake pedal is released) appear on the screen. NG --> See step 11 OK: Go to next step
6. READ VALUE USING TECHSTREAM Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Power Supply Condition Power supply state/IG2 ON, ST ON, All OFF, IG1 ON or ACC ON All OFF: Power switch off (ACC and IG) ACC ON: Power switch on (ACC) IG1 ON: Power switch on (IG) (IG1 relay on) IG2 ON: Power switch on (IG) (IG2 relay on) ST ON: Sending hybrid control system start request signal Since the IG1 and IG2 relays turn on at approximately the same time, IG1 ON may not be displayed (the IG1 relay turns on for a very short time). With the power switch off and brake pedal depressed, hold the electrical key transmitter sub-assembly near the power switch for 2 seconds or more and read the Data List. OK IG2 ON is displayed in the Data List. HINT: If the smart key system function has been canceled on the customization menu, ACC ON is displayed in the Data List. NG --> See step 13 OK: Go to next step
7. CHECK POWER MANAGEMENT CONTROL ECU Read the Data List according to the display on the Techstream. Measure the voltage according to the value(s) in the table below. TEXT IN ILLUSTRATION *a Component with harness connected (Power Management Control ECU) Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Power Supply Condition Power supply state/IG2 ON, ST ON, All OFF, IG1 ON or ACC ON All OFF: Power switch off (ACC and IG) ACC ON: Power switch on (ACC) IG1 ON: Power switch on (IG) (IG1 relay on) IG2 ON: Power switch on (IG) (IG2 relay on) ST ON: Sending hybrid control system start request signal Since the IG1 and IG2 relays turn on at approximately the same time, IG1 ON may not be displayed (the IG1 relay turns on for a very short time). Measure the voltage while checking the Data List on the Techstream. Standard Voltage Tester Connection Condition Specified Condition G58-2 (IG1D) - Body ground Power switch off 1 V or less Power switch on (ACC) 1 V or less Power switch on (IG) 9 V or higher A39-2 (IG2D) - Body ground Power switch off 1 V or less Power switch on (ACC) 1 V or less Power switch on (IG) 9 V or higher G58-1 (ACCD) - Body ground Power switch off 1 V or less Power switch on (IG) 8.5 V or higher Power switch on (ACC) 8.5 V or higher NG --> See step 14 OK --> CHECK RELAY CONTACT SIDE CIRCUIT
8. READ VALUE USING TECHSTREAM Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Start Switch1 Power switch 1 status/ON or OFF ON: Power switch pressed OFF: Power switch not pressed If the power switch is pressed for a short time, the display may not change. Use this item to determine whether the power switch input signal is malfunctioning. Start Switch2 Power switch 2 status/ON or OFF ON: Power switch pressed OFF: Power switch not pressed Backup for power switch 1. However, when the power switch is pressed and held, the control functions only when both power switch 1 and 2 are normal. Behaves the same way as power switch 1. OK ON (Power switch is pressed) and OFF (Power switch is not pressed) appear on the screen. Result Result Proceed to NG A OK B B --> See step 19 A: Go to next step
9. INSPECT POWER SWITCH Inspect the power switch. Refer to «INSPECTION»(/toyota/prius-c/i-2011-2015/remont/starter/#starting-system-service-information) . NG --> See step 15 OK: Go to next step
10. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - POWER SWITCH) Disconnect the G57 and G58 connectors from the power management control ECU. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition G57-7 (SSW1) - G48-5 (SS1) Always Below 1 ohms G58-17 (SSW2) - G48-1 (SS2) Always Below 1 ohms G57-7 (SSW1) or G48-5 (SS1) - Body ground Always 10 kohms or higher G58-17 (SSW2) or G48-1 (SS2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 14
11. INSPECT STOP LIGHT SWITCH ASSEMBLY Disconnect the A32 connector from stop light switch assembly. Measure the voltage and resistance according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A32-7 (B)- A32-2 (GND) Power switch off 11 to 14 V Standard Resistance Tester Connection Condition Specified Condition A32-2 (GND) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Stop Light Switch Assembly) NG --> See step 20 OK: Go to next step
12. 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 14
13. CHECK FOR DTC Enter the following menus: for Smart Key: Body Electrical /Smart Key / Trouble Codes. Check for DTCs. Result Result Proceed to The following DTCs are not output: B2785 B2287 B2784 B278A A DTC B2785 is not output but DTC B2287 is output. B DTCs other than B2287 are output. C B --> See step 16 C --> GO TO OTHER FLOW CHART A --> See step 18
14. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/body-electrical/#power-distribution-service-information)
15. REPLACE POWER SWITCH. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/starter/#starting-system-service-information)
16. GO TO FLOW CHART (DTC B2287). Refer to «DTC B2287: LIN Communication Master Malfunction»(/toyota/prius-c/i-2011-2015/remont/communication-devices/#lin-communication-system-diagnostic-codes-b126a-b278c)
17. GO TO OTHER FLOW CHART (All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate). Refer to «All Door Entry Lock/Unlock Functions do not Operate, but Wireless Functions Operate»(/toyota/prius-c/i-2011-2015/remont/door-locks-anti-theft-systems/#smart-key-system-for-entry-function-diagnostic-codes-symptom-tests)
18. REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY. Refer to «DTC B2287: LIN Communication Master Malfunction»(/toyota/prius-c/i-2011-2015/remont/communication-devices/#lin-communication-system-diagnostic-codes-b126a-b278c)
19. GO TO OTHER FLOW CHART (Room Oscillator does not Recognize Key). Refer to «Room Oscillator does not Recognize Key»(/toyota/prius-c/i-2011-2015/remont/door-locks-anti-theft-systems/#smart-key-system-for-entry-function-diagnostic-codes-symptom-tests)
20. REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/exterior-lights/#lighting-system-exterior-service-information)

If the power switch is pressed with the electrical key transmitter sub-assembly in the cabin, the power management control ECU receives a signal and changes the power source mode.

HINT

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

Scheme 48

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / DTC. for Smart Key: Body Electrical / Smart Key / DTC. The smart key system (for Start Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. Make sure that no DTCs are output. If any DTCs are output, proceed to the Diagnostic Trouble Code Chart. Refer to DIAGNOSTIC TROUBLE CODE CHART . 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 49

Scheme 50

1. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - NO. 1 INTEGRATION RELAY) Disconnect the A39 connector from the power management control ECU. Disconnect the 2D and 2E connectors from the No. 1 integration relay. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A39-2 (IG2D) - 2D-3 Always Below 1 ohms 2D-2 - Body ground Always Below 1 ohms A39-2 (IG2D) or 2D-3 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. INSPECT NO. 1 INTEGRATION RELAY (IG2 RELAY) Remove the No. 1 integration relay. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/engine-control-systems/#engine-control-system-service-information) . Inspect the No. 1 integration relay. Refer to «INSTALLATION»(/toyota/prius-c/i-2011-2015/remont/engine-control-systems/#engine-control-system-service-information) . NG --> See step 8 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) Disconnect the G58 connector from the power management control ECU. Disconnect the 3A and 3B connectors from the instrument panel junction block assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition G58-2 (IG1D) - 3A-29 Always Below 1 ohms 3B-8 - Body ground Always Below 1 ohms G58-2 (IG1D) and 3A-29 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG1 NO. 1, IG1 NO. 2 AND IG1 NO. 3 RELAY) Remove the instrument panel junction block assembly. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/body-electrical/#power-distribution-service-information) . Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/body-electrical/#power-distribution-service-information) . Measure the resistance according to the value(s) in the table below. TEXT IN ILLUSTRATION *a Component without harness connected (Instrument Panel Junction Block Assembly) - - Standard Resistance Tester Connection Condition Specified Condition 3E-1 - 3A-54 (IG1 No. 1 relay) 3E-1 - 3A-9 (IG1 No. 2 relay) 3E-1 - 3A-3 (IG1 No. 3 relay) Auxiliary battery voltage not applied to terminals 3A-29 and 3B-8 10 kohms or higher Auxiliary battery voltage applied to terminals 3A-29 and 3B-8 Below 1 ohms NG --> See step 6 OK: Go to next step
5. CHECK POWER MANAGEMENT CONTROL ECU Reconnect the A39 and G58 power management control ECU connectors. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A39-2 (IG2D) - Body ground Power switch on (ACC) --> Power switch on (IG) 1 V or less --> 9 V or higher G58-2 (IG1D) - Body ground Power switch on (ACC) --> Power switch on (IG) 1 V or less --> 9 V or higher TEXT IN ILLUSTRATION *a Component with harness connected (Power Management Control ECU) NG --> See step 7 OK --> CHECK RELAY CONTACT SIDE CIRCUIT
6. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/body-electrical/#power-distribution-service-information)
7. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/body-electrical/#power-distribution-service-information)
8. REPLACE NO. 1 INTEGRATION RELAY. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/engine-control-systems/#engine-control-system-service-information)

If the power switch is pressed with the electrical key transmitter sub-assembly in the cabin, the power management control ECU receives a signal and changes the power source mode.

HINT

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

Scheme 51

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / DTC. for Smart Key: Body Electrical / Smart Key / DTC. The smart key system (for Start Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. Make sure that no DTCs are output. If any DTCs are output, proceed to the Diagnostic Trouble Code Chart. Refer to DIAGNOSTIC TROUBLE CODE CHART . If the smart key system is disabled through the customize function, enable the system before performing troubleshooting. Refer to CUSTOMIZE PARAMETERS . Inspect the fuses for circuits related to this system before performing the following inspection procedure. After completing repairs, confirm that the problem does not occur.

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

1. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) See step 3 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY See step 4 NG --> See step 4 OK: Go to next step
3. INSPECT POWER MANAGEMENT CONTROL ECU See step 5 NG --> See step 5 OK --> CHECK RELAY CONTACT SIDE CIRCUIT
4. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/body-electrical/#power-distribution-service-information)
5. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/body-electrical/#power-distribution-service-information)

When the electrical key transmitter sub-assembly is in the vehicle and the power switch is pressed, the power management control ECU receives a signal and changes the power source mode. In addition, when the shift lever is in P and the brake pedal is depressed, the hybrid control system can be started by pressing the power switch.

HINT

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

WIRING DIAGRAM

Refer to "System Diagram". Refer to SYSTEM DIAGRAM

Note. When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: for Power Source Control: Body Electrical / Power Source Control / DTC. for Smart Key: Body Electrical / Smart Key / DTC. The smart key system (for Start Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly. If the smart key system is disabled through the customize function, enable the system before performing troubleshooting. Refer to CUSTOMIZE PARAMETERS . Before replacing the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator assembly), refer to the smart key system (for Start Function) precaution. Refer to PRECAUTION . Before replacing the power management control ECU, refer to the engine immobiliser system. Refer to REGISTRATION . Inspect the fuses of circuits related to this system before performing the following inspection procedure. If the steering lock ECU (steering lock actuator assembly) is replaced, be sure to confirm that the steering is unlocked by turning the steering wheel to the left and right before starting the hybrid control system. If the steering is locked for any reason, open and close a door with the power switch off, and then unlock the steering by pressing the power switch. This prevents the hybrid control system from starting while the steering is locked. After completing repairs, confirm that the problem does not occur.

HINT

RELATED DATA LIST AND ACTIVE TEST ITEMS

Scheme 52

Scheme 53

Scheme 54

Scheme 55

Scheme 56

1. CHECK HYBRID CONTROL SYSTEM (READY ON) Place the electrical key transmitter sub-assembly on the driver seat. Depress the brake pedal. Confirm that the smart warning light is displayed, and then press the power switch and check that the hybrid system turns on (READY). OK Power source mode becomes on (READY). NG --> See step 2 OK --> END (HYBRID SYSTEM PERMISSION CONDITIONS WERE NOT SATISFIED)
2. CHECK AUXILIARY BATTERY Measure the auxiliary battery voltage with the power switch off. Standard voltage 11 to 14 V HINT: It may be possible to tell whether the auxiliary battery is discharged by operating the horn. If the auxiliary battery voltage is less than 11 V, charge or replace it. NEXT: Go to next step
3. CHECK FOR DTC (ALL) Using the Techstream, confirm the output of DTCs for all systems. OK No DTCs are output. NOTE: 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
4. CHECK WAVE ENVIRONMENT If the problem occurs in certain locations or times of day, the possibility of wave interference is high. HINT: Whether or not the problem is due to wave interference can be checked by holding the electrical key transmitter sub-assembly near the door control receiver (RF band). NEXT: Go to next step
5. CHECK POWER SWITCH CONDITION Get into the vehicle while carrying an electrical key transmitter sub-assembly. Move the shift lever to P. With the brake pedal released, check that pressing the power switch causes the power source mode to change. Result Result Proceed to Off --> on (ACC) --> on (IG) --> off A Power source mode does not change to on (ACC) and on (IG) B Power source mode changes to on (IG) but not to on (ACC) C Power source mode changes to on (ACC) but not to on (IG) D B --> See step 25 C --> See step 26 D --> See step 27 A: Go to next step
6. READ VALUE USING TECHSTREAM (STEERING UNLOCK SWITCH) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Power Source Control / Data List. 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 and the power switch is off, if any door is opened or closed, the steering is locked. When the electrical key transmitter sub-assembly is inside the vehicle and the power switch is turned on (ACC) or on (IG), the steering unlocks. The hybrid control system cannot be started when the steering unlock signal is off. OK The item in the Data List indicates "ON" (the steering is unlocked). NG --> See step 23 OK: Go to next step
7. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH1) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Power Source Control / Data List. 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 hybrid control system cannot be started when this item is OFF. When this item is malfunctioning, the hybrid control system can be started by pressing and holding the power switch for a certain period of time. OK The item in the Data List changes when the brake pedal is depressed and released. NG --> See step 10 OK: Go to next step
8. READ VALUE USING TECHSTREAM (L CODE CHECK) Connect the Techstream to the DLC3. Turn the power 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 w/o ID Code Box (Immobiliser Code ECU): Verification result between certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator assembly)/OK or NG w/ ID Code Box (Immobiliser Code ECU): Verification result between ID code box (immobiliser code ECU) and steering lock ECU (steering lock actuator assembly)/OK or NG OK: Verification result normal NG: Verification result abnormal When NG is displayed: L code has not been registered for the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) or steering lock ECU (steering lock actuator assembly). Steering wheel cannot be locked. Steering wheel cannot be unlocked (the hybrid system cannot be started). OK The Data List item changes to "OK" when the electrical key transmitter sub-assembly is inside the vehicle. HINT: Reasons for verification failure: The steering lock ECU (steering lock actuator assembly) 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 13 OK: Go to next step
9. READ VALUE USING TECHSTREAM (STARTER REQUEST SIGNAL) Connect the Techstream to the DLC3. Turn the power 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 Engine Start Condition Status of hybrid control system start permission signal determined by steering lock ECU (steering lock actuator assembly) and sent to certification ECU (smart key ECU assembly)/ OK or NG OK: Hybrid control system start permitted NG: Hybrid control system start prohibited When OK is displayed, the certification ECU (smart key ECU assembly) receives an unlock confirmation signal from the steering lock ECU (steering lock actuator assembly) and hybrid control system starting possible. The hybrid control system cannot be started when NG is displayed. NOTE: Check that the smart warning is displayed on the multi-information display on the combination meter assembly, and then press the power switch. OK The display changes in response to the operation of the power switch. Result Result Proceed to NG A OK B B --> See step 15 A --> REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
10. CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - POWER SOURCE AND BODY GROUND) Disconnect the A32 connector from the stop light switch assembly. Measure the voltage and resistance according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A32-7 (B) - A32-2 (GND) Power switch off 11 to 14 V Standard Resistance Tester Connection Condition Specified Condition A32-2 (GND) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Stop Light Switch Assembly) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
11. CHECK STOP LIGHT SWITCH ASSEMBLY Reconnect the A32 connector to the stop light switch assembly. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A32-7 (B) - A32-2 (GND) Power switch off, brake pedal not depressed Below 1 V A32-7 (B) - A32-2 (GND) Power switch off, brake pedal depressed 11 to 14 V TEXT IN ILLUSTRATION *a Component with harness connected (Stop Light Switch Assembly) NG --> See step 24 OK: Go to next step
12. 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 29
13. CHECK STEERING LOCK ACTUATOR ASSEMBLY Replace the steering lock ECU (steering lock actuator assembly) with a new one. Refer to «DISASSEMBLY»(/toyota/prius-c/i-2011-2015/remont/steering-column/#steering-column-service-information) . Perform the registration procedures (Refer to the Service Bulletin). NEXT: Go to next step
14. CHECK HYBRID CONTROL SYSTEM (READY ON) Place the electrical key transmitter sub-assembly on the driver seat. Depress the brake pedal. Confirm that the smart warning light is displayed, and then press the power switch and check that the hybrid system turns on (READY). OK Power source mode becomes on (READY). NG --> See step 30 OK --> END (STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) WAS DEFECTIVE)
15. READ VALUE USING TECHSTREAM (S CODE CHECK) Connect the Techstream to the DLC3. Turn the power 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 NG is displayed: registered for the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU). Steering cannot be locked. Steering cannot be unlocked (the hybrid system cannot be started). OK The Data List item changes to "OK" when the electrical key transmitter sub-assembly is inside the vehicle. HINT: Reasons for verification failure: The 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 18 OK: Go to next step
16. CHECK ENGINE IMMOBILISER SYSTEM Measure the voltage according to the value(s) in the table below. TEXT IN ILLUSTRATION *a Component with harness connected (Power Management Control ECU) Waveform 1 TEXT IN ILLUSTRATION *a Approximately 160 ms *b Approximately 270 ms MEASUREMENT CONDITION Item Content Tester Connection G58-20 (IMO) - G57-6 (E1) Tool Setting 2 V/DIV., 500 ms./DIV. Condition Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected Waveform 2 TEXT IN ILLUSTRATION *a Approximately 160 ms *b Approximately 270 ms MEASUREMENT CONDITION Item Content Tester Connection G58-21 (IMI) - G57-6 (E1) Tool Setting 2 V/DIV., 500 ms./DIV. Condition Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected OK The waveform is displayed as shown in illustration. NG --> See step 20 OK: Go to next step
17. READ VALUE USING TECHSTREAM (STARTER REQUEST SIGNAL) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Power Source Control / Data List. 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 Hybrid control system start request signal status/ON or OFF ON: With the shift lever in P and brake pedal depressed, the power switch is pressed and held OFF: After approx. 1 sec. has elapsed, the power switch is released When the hybrid control system cannot be started due to a start request signal malfunction, OFF is displayed. When the power switch is pressed, the duration of time that ON is displayed will be extremely short. As such, the power switch needs to be pressed and held for a certain amount of time. NOTE: Check that the smart warning is displayed on the multi-information display on the combination meter assembly, and then press the power switch. OK The display changes in response to the operation of the power switch. NG --> See step 29 OK --> See step 28
18. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Replace the certification ECU (smart key ECU assembly) with a new one. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/door-locks-anti-theft-systems/#theft-deterrent-system-keyless-entry-system-service-information) . Perform the registration procedures. Refer to «REGISTRATION»(/toyota/prius-c/i-2011-2015/remont/door-locks-anti-theft-systems/#engine-immobiliser-with-smart-key-system-diagnostics-introduction) . NEXT: Go to next step
19. CHECK HYBRID CONTROL SYSTEM (READY ON) Place the electrical key transmitter sub-assembly on the driver seat. Depress the brake pedal. Confirm that the smart warning light is displayed, and then press the power switch and check that the hybrid system turns on (READY). OK Power source mode becomes on (READY). NG --> See step 30 OK --> END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE)
20. CHECK AND REPLACE HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - ID CODE BOX (IMMOBILISER CODE ECU)) Disconnect the G58 connector from the power management control ECU. Disconnect the G49 connector from the ID code box (immobiliser code ECU). Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition G58-20 (IMO) - G49-3 (EFII) Always Below 1 ohms G58-21 (IMI) - G49-4 (EFIO) Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
21. REPLACE POWER MANAGEMENT CONTROL ECU Replace the power management control ECU with a new one. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/body-electrical/#power-distribution-service-information) . NEXT: Go to next step
22. CHECK HYBRID CONTROL SYSTEM (READY ON) Place the electrical key transmitter sub-assembly on the driver seat. Depress the brake pedal. Confirm that the smart warning light is displayed, and then press the power switch and check that the hybrid system turns on (READY). OK Power source mode becomes on (READY). NG --> See step 30 OK --> END (POWER MANAGEMENT CONTROL ECU WAS DEFECTIVE)
23. GO TO STEERING LOCK SYSTEM (UNABLE TO UNLOCK STEERING WHEEL). Refer to «Unable to Lock Steering Wheel»(/toyota/prius-c/i-2011-2015/remont/steering-column/#steering-lock-system-diagnostic-codes-symptom-tests)
24. REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/exterior-lights/#lighting-system-exterior-service-information)
25. 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)»(/toyota/prius-c/i-2011-2015/remont/starter/#smart-key-system-start-function-diagnostic-codes-symptom-tests)
26. GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (IG). Refer to «Power Source Mode does not Change to ON (IG)»(/toyota/prius-c/i-2011-2015/remont/starter/#smart-key-system-start-function-diagnostic-codes-symptom-tests)
27. GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (ACC). Refer to «Power Source Mode does not Change to ON (ACC)»(/toyota/prius-c/i-2011-2015/remont/starter/#smart-key-system-start-function-diagnostic-codes-symptom-tests)
28. GO TO HYBRID CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-c/i-2011-2015/remont/engine-control-systems/#hybrid-control-system-diagnostics-introduction__how-to-proceed-with-troubleshooting)
29. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/body-electrical/#power-distribution-service-information)
30. REPLACE ID CODE BOX (IMMOBILISER CODE ECU). Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/door-locks-anti-theft-systems/#theft-deterrent-system-keyless-entry-system-service-information)

See also:
• HOW TO PROCEED WITH TROUBLESHOOTING
• REMOVAL
• HOW TO PROCEED WITH TROUBLESHOOTING
• DTC CHECK / CLEAR
• Speedometer Malfunction
• HOW TO PROCEED WITH TROUBLESHOOTING
• PRECAUTION
• DTC CHECK / CLEAR
• DTC B2785: Communication Malfunction between ECUs Connected by LIN
• DISASSEMBLY
• HOW TO PROCEED WITH TROUBLESHOOTING
• OPERATION HISTORY LIST
• CUSTOMIZE PARAMETERS
• REPLACEMENT
• INSPECTION
• All Door Entry Lock/Unlock Functions do not Operate, but Wireless Functions Operate
• REMOVAL
• DIAGNOSTIC TROUBLE CODE CHART
• REMOVAL
• SYSTEM DIAGRAM
• CUSTOMIZE PARAMETERS
• REGISTRATION
• REMOVAL
• Unable to Lock Steering Wheel
• HOW TO PROCEED WITH TROUBLESHOOTING
• Power Source Mode does not Change to ON (IG and ACC)