Occupant Classification System (Diagnostics - Introduction): Diagnosis Scion tC II рестайлинг

HOW TO PROCEED WITH TROUBLESHOOTING [05/2013 - 01/2014]

HINT

*: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
2. CUSTOMER PROBLEM ANALYSIS NEXT: Go to next step
3. PASSENGER AIRBAG ON/OFF INDICATOR CHECK NEXT: Go to next step
4. CHECK DTC (Present and Past DTCs)* Check for DTCs. Refer to «DTC CHECK / CLEAR [05/2013 - ]»(ref-615125-S15981703992014050900000) . Result Result Proceed to DTC is output. A DTC is not output. B B --> GO TO PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [05/2013 - 01/2014]»(ref-615125-S26185293802014050900000) A: Go to next step
5. DTC CHART NEXT: Go to next step
6. CIRCUIT INSPECTION* NEXT: Go to next step
7. REPAIR NEXT: Go to next step
8. CLEAR DTCS (Present and Past DTCs)* Clear the DTCs. Refer to «DTC CHECK / CLEAR [05/2013 - ]»(ref-615125-S15981703992014050900000) . NEXT: Go to next step
9. CHECK DTC (Present and Past DTCs)* Check for DTCs. Refer to «DTC CHECK / CLEAR [05/2013 - ]»(ref-615125-S15981703992014050900000) . Result Result Proceed to DTC is not output. A DTC is output. B B --> Go to step 5 A: Go to next step
10. SYMPTOM SIMULATION Check the passenger airbag ON/OFF indicator condition. Result Result Proceed to Passenger airbag ON/OFF indicator is operating normally. A Passenger airbag ON/OFF indicator ("OFF") and SRS warning light come on. B B --> Go to step 5 A: Go to next step
11. CONFIRMATION TEST NEXT --> END

HOW TO PROCEED WITH TROUBLESHOOTING [01/2014 - ]

HINT

*: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
2. CUSTOMER PROBLEM ANALYSIS NEXT: Go to next step
3. PASSENGER AIRBAG ON/OFF INDICATOR CHECK NEXT: Go to next step
4. CHECK DTC (Present and Past DTCs)* Check for DTCs. Refer to «DTC CHECK / CLEAR [05/2013 - ]»(ref-615125-S15981703992014050900000) . Result Result Proceed to DTC is output. A DTC is not output. B B --> GO TO PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [01/2014 - ]»(ref-615125-S35043372752014050900000) A: Go to next step
5. DTC CHART NEXT: Go to next step
6. CIRCUIT INSPECTION* NEXT: Go to next step
7. REPAIR NEXT: Go to next step
8. CLEAR DTCS (Present and Past DTCs)* Clear the DTCs. Refer to «DTC CHECK / CLEAR [05/2013 - ]»(ref-615125-S15981703992014050900000) . NEXT: Go to next step
9. CHECK DTC (Present and Past DTCs)* Check for DTCs. Refer to «DTC CHECK / CLEAR [05/2013 - ]»(ref-615125-S15981703992014050900000) . Result Result Proceed to DTC is not output. A DTC is output. B B --> Go to step 5 A: Go to next step
10. SYMPTOM SIMULATION Check the passenger airbag ON/OFF indicator condition. Result Result Proceed to Passenger airbag ON/OFF indicator is operating normally. A Passenger airbag ON/OFF indicator ("OFF") and SRS warning light come on. B B --> Go to step 5 A: Go to next step
11. CONFIRMATION TEST NEXT --> END

PROBLEM SYMPTOMS TABLE [05/2013 - 01/2014]

HINT

1. Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
2. Inspect the fuses and relays related to this system before inspecting the suspected areas below.

OCCUPANT CLASSIFICATION SYSTEM

PROBLEM SYMPTOMS TABLE [01/2014 - ]

HINT

1. Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
2. Inspect the fuses and relays related to this system before inspecting the suspected areas below.

OCCUPANT CLASSIFICATION SYSTEM

Scheme 1

1. CHECK OCCUPANT CLASSIFICATION ECU Measure the resistance and voltage according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition z7-1 (+B) - z7-3 (GND) W - W-B Battery power supply Always 11 to 14 V z7-2 (DIA) - z7-3 (GND) GR - W-B Diagnosis (DLC3) Ignition switch ON Pulse generation z7-3 (GND) - Body ground W-B - Body ground Ground Always Below 1 V z7-4 (FSR-) - z7-3 (GND) LG - W-B Center airbag sensor assembly communication line Always Below 1 V z7-5 (BGND) - z7-3 (GND) P - W-B Front passenger side buckle switch ground line Always Below 1 V z7-7 (IG2) - z7-3 (GND) B - W-B Ignition switch power supply Ignition switch ON 11 to 14 V z7-8 (FSR+) - z7-4 (FSR-) L - LG Center airbag sensor assembly communication line Ignition switch ON Pulse generation z7-9 (BSW) - z7-5 (BGND) G - P Front passenger side buckle switch line Always Pulse generation z6-1 (SGD1) - z7-3 (GND) G - W-B Front occupant classification sensor LH ground line Always Below 1 V z6-2 (SGD2) - z7-3 (GND) LG - W-B Front occupant classification sensor RH ground line Always Below 1 V z6-3 (SGD3) - z7-3 (GND) W - W-B Rear occupant classification sensor LH ground line Always Below 1 V z6-4 (SGD4) - z7-3 (GND) BR - W-B Rear occupant classification sensor RH ground line Always Below 1 V z6-11 (SVC1) - z6-1 (SGD1) R - G Front occupant classification sensor LH power supply line Ignition switch ON, load applied to front occupant classification sensor LH 4.9 to 5.1 V z6-12 (SVC2) - z6-2 (SGD2) W - LG Front occupant classification sensor RH power supply line Ignition switch ON, load applied to front occupant classification sensor RH 4.9 to 5.1 V z6-5 (SVC3) - z6-3 (SGD3) GR - W Rear occupant classification sensor LH signal line Ignition switch ON, load applied to rear occupant classification sensor LH 4.9 to 5.1 V z6-6 (SVC4) - z6-4 (SGD4) V - BR Rear occupant classification sensor RH signal line Ignition switch ON, load applied to rear occupant classification sensor RH 4.9 to 5.1 V z6-7 (SIG1) - z6-1 (SGD1) P - G Front occupant classification sensor LH signal line Ignition switch ON, load applied to front occupant classification sensor LH 0 to 5.1 V z6-8 (SIG2) - z6-2 (SGD2) L - LG Front occupant classification sensor RH signal line Ignition switch ON, load applied to front occupant classification sensor RH 0 to 5.1 V z6-9 (SIG3) - z6-3 (SGD3) SB - W Rear occupant classification sensor LH power supply line Ignition switch ON, load applied to rear occupant classification sensor LH 0 to 5.1 V z6-10 (SIG4) - z6-4 (SGD4) B - BR Rear occupant classification sensor RH power supply line Ignition switch ON, load applied to rear occupant classification sensor RH 0 to 5.1 V If the result is not as specified, the ECU may have a malfunction.

Scheme 2

Scheme 3

1. SYMPTOM SIMULATION HINT: The most difficult case in troubleshooting is when no problem symptoms occur. In such a case, a thorough problem analysis must be carried out. A simulation of the same or similar conditions and environment in which the problem occurred in the customer's vehicle should be carried out. No matter how much skill or experience a technician has, troubleshooting without confirming the problem symptoms will lead to important repairs being overlooked and mistakes or delays. Vibration method: When vibration seems to be the major cause. HINT: Perform the simulation method only during the primary check period (the period of approximately 6 seconds after the ignition switch is turned to ON). Slightly vibrate the part of the sensor considered to be the cause of the problem with your fingers and check whether the malfunction occurs. HINT: Shaking the relays too strongly may result in open relays. Slightly shake the connector vertically and horizontally. Slightly shake the wire harness vertically and horizontally. The connector joint and fulcrum of the vibration are the major areas to be checked thoroughly. Simulation method for DTC B1795: Turn the ignition switch from off to ON, wait for 10 seconds, and then turn the ignition switch off again 50 times in a row. HINT: DTC B1795 is stored if the occupant classification ECU receives the ignition switch off-ON-off signal pattern 50 times in a row when a malfunction occurs in the power circuit for the occupant classification system.
2. FUNCTION OF PASSENGER AIRBAG ON/OFF INDICATOR Initial check Turn the ignition switch to ON. The passenger airbag ON/OFF indicator ("ON" and "OFF") comes on for approximately 4 seconds, and then goes off for approximately 2 seconds. Approximately 6 seconds after the ignition switch is turned to ON, the passenger airbag ON/OFF indicator indicates "ON" or "OFF" depending on the conditions listed below. Front Passenger Seat Condition ON Indicator OFF Indicator Vacant Off Off Adult is seated On Off Child is seated Off On Front passenger occupant classification system failure Off On HINT: The passenger airbag ON/OFF indicator comes on based on the timing chart below in order to check the indicator light circuit. When there is a problem in the occupant classification system, both the SRS warning light and passenger airbag ON/OFF indicator ("OFF") come on. In this case, check the DTCs for the airbag system first.
3. CHECK PASSENGER AIRBAG ON/OFF INDICATOR Turn the ignition switch to ON. Check that the passenger airbag ON/OFF indicator ("ON" and "OFF") comes on for approximately 4 seconds, and then goes off for approximately 2 seconds. HINT: In order to check the operation of the passenger airbag ON/OFF indicator when approximately 6 seconds have elapsed after turning the ignition switch ON, refer to the table in the previous step.

DTC CHECK / CLEAR [05/2013 - ]

1. CHECK DTC HINT: When DTC B1650/32 is stored as a result of troubleshooting for the airbag system, perform troubleshooting for the occupant classification system. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Body Electrical / Occupant Detection / Trouble Codes. Check the DTCs by following the prompts on the screen. HINT: Refer to the Techstream operator's manual for further details.
2. CLEAR DTC Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Body Electrical / Occupant Detection / Trouble Codes. Clear the DTCs by following the prompts on the screen. HINT: Refer to the Techstream operator's manual for further details.

DATA LIST / ACTIVE TEST [05/2013 - ]

1. DATA LIST NOTE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not. HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Body Electrical / Occupant Detection / Data List. According to the display on the Techstream, read the "Data List". OCCUPANT DETECTION Tester Display Measurement Item/Range Normal Condition Diagnostic Note IG Switch Ignition switch status / ON or OFF ON: Ignition switch ON OFF: Ignition switch off "OFF" is also displayed for this item when the ignition switch is ACC. Passenger Buckle SW Front passenger side seat belt buckle switch / Unset, Set or NG Unset: Front passenger side seat belt unfastened Set: Front passenger side seat belt fastened NG: Condition undetermined - Passenger Classification Front passenger side seat condition / AM50, AF05, Child or OFF AM50: Adult (more than 54 kg [119.1 lb]) seated AF05: Adult (36 to 54 kg [79.4 to 119.1 lb]) seated Child: Child (less than 36 kg [79.4 lb]) seated OFF: Vacant - Sensor Range Info Sensor range information / OK or NG OK: Value of sensor within range NG: Value of sensor outside range - FL Sensor Range Info Front left sensor range information / OK, Min or Max OK: Sensor range -17 to 27 kg (-37.5 to 59.5 lb) Min.: Less than -17 kg (-37.5 lb) Max.: More than 27 kg (59.5 lb) - FR Sensor Range Info Front right sensor range information / OK, Min or Max OK: Sensor range -17 to 27 kg (-37.5 to 59.5 lb) Min.: Less than -17 kg (-37.5 lb) Max.: More than 27 kg (59.5 lb) - RL Sensor Range Info Rear left sensor range information / OK, Min or Max OK: Sensor range -17 to 37 kg (-37.5 to 81.6 lb) Min.: Less than -17 kg (-37.5 lb) Max.: More than 37 kg (81.6 lb) - RR Sensor Range Info Rear right sensor range information / OK, Min or Max OK: Sensor range -17 to 37 kg (-37.5 to 81.6 lb) Min.: Less than -17 kg (-37.5 lb) Max.: More than 37 kg (81.6 lb) - FL Sensor Voltage Front left sensor voltage/ Min.: 0 V Max.: 19.8 V 0 to 4.7 V - FR Sensor Voltage Front right sensor voltage/ Min.: 0 V Max.: 19.8 V 0 to 4.7 V - RL Sensor Voltage Rear left sensor voltage/ Min.: 0 V Max.: 19.8 V 0 to 4.7 V - RR Sensor Voltage Rear right sensor voltage/ Min.: 0 V Max.: 19.8 V 0 to 4.7 V - FL Sensor Weight Info Front left sensor weight information/ Min.: -17 kg (-37.5 lb) Max.: 27 kg (59.5 lb) -17 to 27 kg (-37.5 to 59.5 lb) - FR Sensor Weight Info Front right sensor weight information/ Min.: -17 kg (-37.5 lb) Max.: 27 kg (59.5 lb) -17 to 27 kg (-37.5 to 59.5 lb) - RL Sensor Weight Info Rear left sensor weight information/ Min.: -17 kg (-37.5 lb) Max.: 37 kg (81.6 lb) -17 to 37 kg (-37.5 to 81.6 lb) - RR Sensor Weight Info Rear right sensor weight information/ Min.: -17 kg (-37.5 lb) Max.: 37 kg (81.6 lb) -17 to 37 kg (-37.5 to 81.6 lb) - Total Weight Information Total weight information/ Min.: -68 kg (-149.9 lb) Max.: 128 kg (282.2 lb) -68 to 128 kg (-149.9 to 282.2 lb) - Number of Present DTC Number of DTCs stored/ Min.: 0, Max.: 255 0 - Number of Past DTC Number of present trouble codes/ Min.: 0, Max.: 255 0

DIAGNOSTIC TROUBLE CODE CHART [05/2013 - 01/2014]

HINT

1. When DTC B1650/32 is stored as a result of troubleshooting for the airbag system, perform troubleshooting for the occupant classification system as shown in the chart below.
2. Use the Techstream to read and clear the DTCs of the occupant classification ECU, otherwise the DTCs cannot be read and cleared.

OCCUPANT CLASSIFICATION SYSTEM

DIAGNOSTIC TROUBLE CODE CHART [01/2014 - ]

HINT

1. When DTC B1650/32 is stored as a result of troubleshooting for the airbag system, perform troubleshooting for the occupant classification system as shown in the chart below.
2. Use the Techstream to read and clear the DTCs of the occupant classification ECU, otherwise the DTCs cannot be read and cleared.

OCCUPANT CLASSIFICATION SYSTEM