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CAN Communication System (Diagnostics & Symptom Tests): Other Toyota Corolla XI

Communication Devices 19 illustrations ~18753 words

FAIL-SAFE CHART [08/2013 - ]

  1. FAIL-SAFE FUNCTION When communication fails in any of the CAN bus lines (communication lines), a fail-safe function(s) will operate. The fail-safe function that is specified for each system operates to prevent those systems from malfunctioning. The following table shows the effects on each system when communication is impossible. (For further details, see articles for each system.) Function Control Master System Related Fail-safe Operation Driver Detectable DTC Detection (ECU that stored DTC) Anti-lock Brake System Control Prevents the wheels from locking during sudden stops. Skid control ECU (brake actuator assembly) Airbag sensor assembly During control: When backup control (stabilizing the vehicle) is complete, the system changes to normal braking and prohibits control. Not during control: Control cannot be performed. Brake warning light illuminates. ABS warning light illuminates. Slip indicator light illuminates. U0073 U0124 (Skid control ECU (brake actuator assembly)) Vehicle Stability Control / Traction Control Suppresses vehicle instability, such as sliding sideways when cornering and wheel slippage when accelerating from rest. Skid control ECU (brake actuator assembly) ECM Airbag sensor assembly Steering sensor During control: When backup control (stabilizing the vehicle) is complete, the system changes to normal braking and prohibits control. Not during control: Control cannot be performed. Brake warning light illuminates. ABS warning light illuminates. Slip indicator light illuminates. U0073 U0100 U0124 U0126 (Skid control ECU (brake actuator assembly)) Air Conditioning Control Corrects engine speed, such as for idle up. Controls outlet air temperature, outlet mode change and airflow volume based on engine coolant temperature signal. Corrects engine coolant temperature map and changes compressor lock judgment value. Air conditioning amplifier assembly ECM Control is performed based on default coolant temperature of 80°C (176°F). Control is performed based on engine model (differs between vehicle models). - U0100 (Air conditioning amplifier assembly) Compressor Control Determines whether the compressor is locked using engine speed information. Air conditioning amplifier assembly ECM Control is performed based on default engine speed of 0 RPM. - U0100 (Air conditioning amplifier assembly) Simple Load Control Limits electrical load control according to the load control level. Air conditioning amplifier assembly Power steering ECU assembly Maintains the latest state (load control is not performed when the system is reset). - U0131 (Air conditioning amplifier assembly) Panel Dimming Control Outputs dimmer signal to LIN connected panels according to display dimmer signal. Air conditioning amplifier assembly Main body ECU (multiplex network body ECU) Dimming mode and non-dimming mode cannot be switched. - U0142 (Air conditioning amplifier assembly) Destination Identification Control Changes air conditioning control pattern according to destination. Air conditioning amplifier assembly Main body ECU (multiplex network body ECU) Maintains the latest state. - U0142 (Air conditioning amplifier assembly) Ambient Temperature Correction Control Switches air conditioning system operation condition and corrects value of displayed ambient temperature according to vehicle speed signal. Air conditioning amplifier assembly Combination meter assembly Control is performed based on default vehicle speed of 0 km/h (0 mph). Correction level for displayed ambient temperature declines. Correction level for outlet airflow declines. U0155 (Air conditioning amplifier assembly) Air Conditioning Control Displays the set temperature, air outlet selection, etc. Navigation receiver assembly Radio and display receiver assembly Air conditioning amplifier assembly Air conditioning system indicators turn off. If set temperature is shown on multi-information display or multi-display, set temperature display turns off. Displays messages on the multi-information display. U0073 U0164 (Navigation receiver assembly) (Radio and display receiver assembly) Fuel Consumption Display Displays graph of fuel consumption per minute and history of total fuel consumption. Navigation receiver assembly Radio and display receiver assembly ECM Skid control ECU (brake actuator assembly) Display is not updated. - U0100 U0129 (Navigation receiver assembly) (Radio and display receiver assembly) Rear View Monitor System Displays images from the rear view camera. Navigation receiver assembly Radio and display receiver assembly ECM Main body ECU (multiplex network body ECU) None Screen does not change to the camera screen. U0100 (Navigation receiver assembly) (Radio and display receiver assembly) Destination Identification Identifies destination based on destination and destination package information, and selects the time zone and language used for the display. Navigation receiver assembly Radio and display receiver assembly Main body ECU (multiplex network body ECU) Destination is identified based on information received before communication is interrupted. Time zone and language selection screen are different from actual destination. U0140 (Navigation receiver assembly) (Radio and display receiver assembly) Vehicle Customization Function Allows changing of operation and control conditions for vehicle functions via multi-display operation. Navigation receiver assembly Radio and display receiver assembly Main body ECU (multiplex network body ECU) Air conditioning amplifier assembly Certification ECU (smart key ECU assembly) Customization via multi-display is not possible, but customization via main body ECU is possible. When an application that uses remote communication is activated (customization/remote diagnosis), the process will be performed regardless of meter ECU remote communication permit/prohibit state. Related customization items are not displayed or do not change to set values. U0073 (Navigation receiver assembly) (Radio and display receiver assembly) Door Lock Controls key linked and automatic door lock/unlock function, key confinement prevention function, etc. Main body ECU (multiplex network body ECU) ECM Airbag sensor assembly Combination meter assembly When the ignition switch is ON, control is performed based on the latest information. When the ignition switch is off, key linked operation is permitted. Speed sensitive automatic lock control does not occur. Shift linked automatic lock control does not occur. Shift linked automatic unlock control does not occur. Automatic lock/unlock cannot be changed. - U0100 U0101 U0151 U0155 (Main body ECU (multiplex network body ECU)) Display Automatic Dimming Display dimming control. Main body ECU (multiplex network body ECU) Combination meter assembly Automatic dimming control for displays does not operate when taillights are turned on. - U0155 (Main body ECU (multiplex network body ECU)) Illumination Performs illumination control. Main body ECU (multiplex network body ECU) Certification ECU (smart key ECU assembly) The dome light is turned off. The dome light does not turn off immediately after the doors are opened and closed. U0327 (Main body ECU (multiplex network body ECU)) Entry Function/Wireless Control Certification ECU (smart key ECU assembly) Main body ECU (multiplex network body ECU) Entry lock/unlock control is not possible. - U0327 (Main body ECU (multiplex network body ECU)) Light Control Daytime running light control. Main body ECU (multiplex network body ECU) ECM The daytime running light control does not operate. - U0100 (Main body ECU (multiplex network body ECU)) Electrical Load Control Perform idle up according to electric load. ECM Power steering ECU assembly Idle up according to the electrical load is not performed. Engine idle speed changes. - Air Conditioning Cooperative Operation Performs idle up according to compressor load. ECM Air conditioning amplifier assembly Air conditioning system does not use cooperative controls. Air conditioning system does not operate. - PTC Heater Performs idle up when there is a heat demand signal that requires operation of the PTC heater. ECM Air conditioning amplifier assembly PTC heater does not operate. Engine idle speed changes. Heating performance deteriorates. PTC heater does not operate. - Charge Control Performs idle up according to charging request. ECM Air conditioning amplifier assembly Idle up according to charging request is not performed. Charging control is not prohibited. Idle up according to charging request is not performed. Tail lights flicker and blower airflow changes. - Eco Driving Indicator Displays information to the driver to encourage eco-driving. ECM Combination meter assembly - No information is displayed. - Eco Control Adjusts throttle response in consideration of actual fuel economy. ECM Air conditioning amplifier assembly Eco mode does not operate. Indicator does not illuminate. Eco mode does not operate. - Neutral Control Reduces engine load and performs idle up. ECM Skid control ECU (brake actuator assembly) Airbag sensor assembly Neutral control is not performed. - - Electronic Power Steering System Calculates the current to be used for the steering assist according to the torque sensor value and vehicle speed, and then operates the motor. Power steering ECU assembly ECM Skid control ECU (brake actuator assembly) Steering sensor Power steering does not operate. Control is performed temporarily with the steering assist amount set to that used when the vehicle speed is 70 km/h (43 mph). The steering feel becomes worse (compensation control using the steering angle is stopped). EPS warning light illuminates. U0100 U0129 (Power steering ECU assembly) αB Control Provides an assist to prevent the vehicle from skidding. Skid control ECU (brake actuator assembly) Power steering ECU assembly When CAN data of the brake actuator assembly becomes invalid during αB control, the control is stopped. EPS warning light illuminates. U0129 (Power steering ECU assembly) Steering Assist Calculation Changes the assist force according to the vehicle speed. Power steering ECU assembly Skid control ECU (brake actuator assembly) Control continues temporarily with a set speed of 70 km/h (43 mph) as the system is unable to recognize the actual vehicle speed. The steering wheel feels heavy below vehicle speeds of 70 km/h (43 mph) and feels light at vehicle speeds exceeding 70 km/h (43 mph). EPS warning light illuminates. U0129 (Power steering ECU assembly) Assist Map Selection Selects proper assist map according to destination, engine type, etc. Power steering ECU assembly Skid control ECU (brake actuator assembly) Default map is used to assist because proper assist map cannot be selected. Steering feel may be different. EPS warning light illuminates. C1581 (Power steering ECU assembly) Initialization and Zero Point Learning Performs steering angle sensor initialization and zero point learning. Power steering ECU assembly Skid control ECU (brake actuator assembly) Steering sensor initialization and zero point learning are not performed. EPS warning light illuminates. U0129 (Power steering ECU assembly) Steering Assist Compensation Control Provides steering assist with compensation amount based on vehicle speed. Power steering ECU assembly Skid control ECU (brake actuator assembly) Control is performed based on a default vehicle speed of approximately 70 km/h (43 mph). EPS warning light illuminates. U0129 (Power steering ECU assembly) Entry Function Entry lock/unlock. Performs entry illumination (interior illumination etc). Warning. Main body ECU (multiplex network body ECU) Certification ECU (smart key ECU assembly) ECM Combination meter assembly Main body ECU (multiplex network body ECU) Entry unlock is performed again. Entry lock/unlock or entry luggage door unlatch does not operate. Warning functions (key confinement, key not in vehicle, key reminder, etc.) do not operate and key confinement prevention control does not operate. Entry illumination does not operate. U0100 U0142 U0155 (Certification ECU (smart key ECU assembly)) Wireless Function Locks and unlocks doors etc. via remote operation. Main body ECU (multiplex network body ECU) Main body ECU (multiplex network body ECU) Certification ECU (smart key ECU assembly) - Wireless lock and unlock do not operate. - Engine Switch Illumination Control Operates the engine switch illumination in conjunction with the dome light illumination, etc. Certification ECU (smart key ECU assembly) Main body ECU (multiplex network body ECU) Certification ECU (smart key ECU assembly) Combination meter assembly If the engine switch is not illuminated, it does not illuminate. When the engine switch is illuminated due to the dome light, the illumination does not turn off. When the DC cut fuse is disconnected and the engine switch illuminated due to the dome light, the illumination does not turn off. If the engine switch is not illuminated, it does not illuminate. When the engine switch is illuminated due to the dome light, the illumination does not turn off. When the DC cut fuse is disconnected and the engine switch illuminated due to the dome light, the illumination does not turn off. U0142 (Certification ECU (smart key ECU assembly)) Engine Start/Stop Switch (Power Source Mode Change) Using start/stop switch signal as trigger, changes power source mode automatically and requests starter operation when conditions are met. Certification ECU (smart key ECU assembly) ECM - A message urging engine start operation is not displayed when required. U0100 (Certification ECU (smart key ECU assembly)) Engine Start Control Allows the engine to start by pressing the engine switch once. (Cranking hold) Certification ECU (smart key ECU assembly) ECM Cranking is stopped when engine starting is judged based on an engine speed signal received via direct line. - U0100 (Certification ECU (smart key ECU assembly)) Vehicle Speed Display Displays the vehicle speed on the speedometer according to the vehicle speed signal from skid control ECU (brake actuator assembly). Combination meter assembly Skid control ECU (brake actuator assembly) Control is performed based on signal value of 0. The needle points at 0 km/h (0 mph). Drive monitor calculation is stopped. U0129 (Combination meter assembly) Tachometer Displays information on the tachometer. Combination meter assembly ECM Control is performed based on signal value of 0. The tachometer displays 0 RPM. The drive monitor stops calculating. U0100 (Combination meter assembly) Airbag Warning Airbag warning light control. Combination meter assembly Airbag sensor assembly Control is performed based on signal value of "Active". Airbag warning light illuminates. U0151 (Combination meter assembly) EPS Warning EPS warning light control. Combination meter assembly Power steering ECU assembly Control is performed based on signal value of "Active". EPS warning light illuminates. U0131 (Combination meter assembly) Slip Warning Slip indicator light control. Combination meter assembly Skid control ECU (brake actuator assembly) Control is performed based on signal value of "Active". Slip indicator light illuminates. - Engine Coolant Temperature Receiver Gauge Control Combination meter assembly ECM Control is performed based on signal value of 0. Needle of engine coolant temperature receiver gauge is at the middle or below.*1 Engine coolant temperature gauge bar segments are not displayed.*2 - Tire Pressure Warning Tire pressure warning light control. Combination meter assembly Main body ECU (multiplex network body ECU) Control is performed based on signal value of "Active". Tire pressure warning light illuminates. U0142 (Combination meter assembly) *1: for Dot LCD Type *2: for Segment LCD Type

CAUTION / NOTICE / HINT

Note. Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Refer to PRECAUTION [08/2013 - ] Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again. DTC check procedure: Turn the ignition switch to ON and wait at least 61 seconds, and then drive the vehicle at a speed of 15 km/h (9 mph) or more for 3 seconds or more. After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed. Refer to DIAGNOSIS SYSTEM [08/2013 - 04/2014] Inspect the fuses for circuits related to this system before performing the following procedure.

HINT

  1. Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
  2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

PROCEDURE

  1. CHECK DTC (BRAKE CONTROL SYSTEM) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes. OK DTC C1241 is not output. Chassis > ABS/VSC/TRAC > Trouble Codes Result Result OK NG Result: 2 NG GO TO DIAGNOSIS PROCEDURES INDICATED BY OUTPUT DTC. Refer to «DTC C1241: Low Power Supply Voltage Malfunction [08/2013 - ]»(ref-635666-S39446805452014070300000) Result: 4 OK See step 2
  2. CHECK FOR OPEN IN CAN BUS LINES (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the A41 skid control ECU (brake actuator assembly) connector. Measure the resistance according to the value(s) in the table below. *a Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly)) Standard Resistance Tester Connection Condition Specified Condition A41-25 (CANH) - A41-14 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 ohms Result Result OK NG Result: 1 OK REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY). Refer to «REMOVAL [08/2013 - 04/2014]»(ref-635613-S06908083762014070300000) Result: 3 NG REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))

Note. Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Refer to PRECAUTION [08/2013 - ] Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again. DTC check procedure: Turn the ignition switch to ON and wait at least 61 seconds, and then drive the vehicle at a speed of 15 km/h (9 mph) or more for 3 seconds or more. After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed. Refer to DIAGNOSIS SYSTEM [04/2014 - ] Inspect the fuses for circuits related to this system before performing the following procedure.

HINT

  1. Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
  2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

Scheme 104

Scheme 104: PROCEDURE
Scheme 104: PROCEDURE
  1. CHECK VEHICLE TYPE Check vehicle type. Result Result Proceed to w/o VSC A w/ VSC B Result: 2 B See step 4 Result: 1 A See step 2
  2. CHECK DTC (BRAKE CONTROL SYSTEM) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes. Chassis > ABS/VSC/TRAC > Trouble Codes Result Result Proceed to DTC C1241 is not output. A DTC C1241 is output. B Result: 2 B GO TO DIAGNOSIS PROCEDURES INDICATED BY OUTPUT DTC. Refer to «DTC C1241: Low Power Supply Voltage Malfunction [04/2014 - ]»(ref-635664-S05103987802014070300000) Result: 4 A See step 3
  3. CHECK FOR OPEN IN CAN BUS LINES (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the A42 skid control ECU (brake actuator assembly) connector. Measure the resistance according to the value(s) in the table below. *a Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly)) Standard Resistance Tester Connection Condition Specified Condition A42-25 (CANH) - A42-14 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 ohms Result Result OK NG Result: 1 OK REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY). Refer to «REMOVAL [04/2014 - ]»(ref-635613-S26461106802014070300000) Result: 3 NG REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))
  4. CHECK DTC (BRAKE CONTROL SYSTEM) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes. Chassis > ABS/VSC/TRAC > Trouble Codes Result Result Proceed to DTC C1241 is not output. A DTC C1241 is output. B Result: 2 B GO TO DIAGNOSIS PROCEDURES INDICATED BY OUTPUT DTC. Refer to «DTC C1241: Low Power Supply Voltage Malfunction [08/2013 - ]»(ref-635666-S39446805452014070300000) Result: 4 A See step 5
  5. CHECK FOR OPEN IN CAN BUS LINES (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the A41 skid control ECU (brake actuator assembly) connector. Measure the resistance according to the value(s) in the table below. *a Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly)) Standard Resistance Tester Connection Condition Specified Condition A41-25 (CANH) - A41-14 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 ohms Result Result OK NG Result: 1 OK REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY). Refer to «REMOVAL [04/2014 - ]»(ref-635613-S26461106802014070300000) Result: 3 NG REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))

Note. Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Refer to PRECAUTION [08/2013 - ] Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again. DTC check procedure: Turn the ignition switch to ON and wait at least 20 seconds. After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed. Refer to DIAGNOSIS SYSTEM [08/2013 - 04/2014] Refer to DIAGNOSIS SYSTEM [04/2014 - ] Inspect the fuses for circuits related to this system before performing the following procedure.

HINT

  1. Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
  2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

Scheme 105

Scheme 105: PROCEDURE
Scheme 105: PROCEDURE

Scheme 106

Scheme 106
Scheme 106

Scheme 107

Scheme 107
Scheme 107
  1. CHECK VEHICLE TYPE Check vehicle type. Result Result Proceed to w/ Automatic air conditioning system A w/ Manual air conditioning system B Result: 2 B See step 4 Result: 1 A See step 2
  2. CHECK FOR OPEN IN CAN BUS LINES (AIR CONDITIONING AMPLIFIER ASSEMBLY BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the E37 air conditioning amplifier assembly connector. Measure the resistance according to the value(s) in the table below. *a Front view of wire harness connector (to Air Conditioning Amplifier Assembly) Standard Resistance Tester Connection Condition Specified Condition E37-11 (CANH) - E37-12 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 ohms Result Result OK NG Result: 3 NG REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY) Result: 1 OK See step 3
  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Measure the resistance according to the value(s) in the table below. *a Front view of wire harness connector (to Air Conditioning Amplifier Assembly) Standard Resistance Tester Connection Condition Specified Condition E37-14 (GND) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms Reconnect the cable to the negative (-) battery terminal. Measure the voltage according to the value(s) in the table below. *a Front view of wire harness connector (to Air Conditioning Amplifier Assembly) Standard Voltage Tester Connection Condition Specified Condition E37-1 (IG+) - Body ground Ignition switch ON 11 to 14 V E37-21 (B) - Body ground Always 11 to 14 V Result Result OK NG Result: 1 OK REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to «REMOVAL [08/2013 - ]»(ref-635597-S41831458172014070300000) Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
  4. CHECK FOR OPEN IN CAN BUS LINES (AIR CONDITIONING AMPLIFIER ASSEMBLY BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the E7 air conditioning amplifier assembly connector. Measure the resistance according to the value(s) in the table below. *a Front view of wire harness connector (to Air Conditioning Amplifier Assembly) Standard Resistance Tester Connection Condition Specified Condition E7-8 (CANH) - E7-9 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 ohms Result Result OK NG Result: 3 NG REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY) Result: 1 OK See step 5
  5. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Measure the resistance according to the value(s) in the table below. *a Front view of wire harness connector (to Air Conditioning Amplifier Assembly) Standard Resistance Tester Connection Condition Specified Condition E7-23 (GND) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms Reconnect the cable to the negative (-) battery terminal. Measure the voltage according to the value(s) in the table below. *a Front view of wire harness connector (to Air Conditioning Amplifier Assembly) Standard Voltage Tester Connection Condition Specified Condition E7-1 (IG+) - Body ground Ignition switch ON 11 to 14 V Result Result OK NG Result: 1 OK REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to «REMOVAL [08/2013 - ]»(ref-635597-S41831458172014070300000) Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

Note. Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Refer to PRECAUTION [08/2013 - ] Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again. DTC check procedure: Turn the ignition switch to ON and wait at least 5.34 seconds, and then drive the vehicle at a speed of 20 km/h (12 mph) or more for 300 seconds or more. After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed. Refer to DIAGNOSIS SYSTEM [08/2013 - 04/2014] Refer to DIAGNOSIS SYSTEM [04/2014 - ] Inspect the fuses for circuits related to this system before performing the following procedure.

HINT

  1. Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
  2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

Scheme 108

Scheme 108: PROCEDURE
Scheme 108: PROCEDURE
  1. CHECK FOR OPEN IN CAN BUS LINES (POWER STEERING ECU ASSEMBLY BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the E40 power steering ECU assembly connector. Measure the resistance according to the value(s) in the table below. *a Front view of wire harness connector (to Power Steering ECU Assembly) Standard Resistance Tester Connection Condition Specified Condition E40-7 (CANH) - E40-8 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 ohms Result Result OK NG Result: 2 NG REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (POWER STEERING ECU ASSEMBLY) Result: 1 OK See step 2
  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Disconnect the A25 power steering ECU assembly connector. Measure the resistance according to the value(s) in the table below. *a Front view of wire harness connector (to Power Steering ECU Assembly) Standard Resistance Tester Connection Condition Specified Condition A25-2 (PGND) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms Reconnect the cable to the negative (-) battery terminal. Measure the voltage according to the value(s) in the table below. *a Front view of wire harness connector (to Power Steering ECU Assembly) Standard Voltage Tester Connection Condition Specified Condition E40-1 (IG) - Body ground Ignition switch ON 11 to 14 V Result Result OK NG Result: 1 OK REPLACE POWER STEERING ECU ASSEMBLY. Refer to «REMOVAL [08/2013 - ]»(ref-635665-S34552393192014070300000) Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

Note. Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Refer to PRECAUTION [08/2013 - ] Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again. DTC check procedure: Turn the ignition switch to ON and wait at least 61 seconds. After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed. Refer to DIAGNOSIS SYSTEM [08/2013 - 04/2014] Refer to DIAGNOSIS SYSTEM [04/2014 - ] Inspect the fuses for circuits related to this system before performing the following procedure.

HINT

  1. Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
  2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
  1. CHECK FOR OPEN IN CAN BUS LINES (STEERING SENSOR BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the E50 steering sensor connector. Measure the resistance according to the value(s) in the table below. *a Front view of wire harness connector (to Steering Sensor) Standard Resistance Tester Connection Condition Specified Condition E50-3 (CANH) - E50-2 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 ohms Result Result OK NG Result: 2 NG REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (STEERING SENSOR) Result: 1 OK See step 2
  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Measure the resistance according to the value(s) in the table below. *a Front view of wire harness connector (to Steering Sensor) Standard Resistance Tester Connection Condition Specified Condition E50-1 (ESS) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms Reconnect the cable to the negative (-) battery terminal. Measure the voltage according to the value(s) in the table below. *a Front view of wire harness connector (to Steering Sensor) Standard Voltage Tester Connection Condition Specified Condition E50-4 (IG) - Body ground Ignition switch ON 11 to 14 V E50-5 (BAT) - Body ground Always 11 to 14 V Result Result OK NG Result: 1 OK REPLACE STEERING SENSOR. Refer to «REMOVAL [08/2013 - ]»(ref-635613-S22562473032014070300000) Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

Note. Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Refer to PRECAUTION [08/2013 - ] Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again. DTC check procedure: Turn the ignition switch to ON and wait at least 20 seconds, and then drive the vehicle at a speed of 20 km/h (12 mph) or more for 300 seconds or more. After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed. Refer to DIAGNOSIS SYSTEM [08/2013 - 04/2014] Refer to DIAGNOSIS SYSTEM [04/2014 - ] Inspect the fuses for circuits related to this system before performing the following procedure.

HINT

  1. Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
  2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

Scheme 109

Scheme 109: PROCEDURE
Scheme 109: PROCEDURE
  1. CHECK FOR OPEN IN CAN BUS LINES (ECM MAIN LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the A40 ECM connector. Measure the resistance according to the value(s) in the table below. *a Front view of wire harness connector (to ECM) Standard Resistance Tester Connection Condition Specified Condition A40-13 (CANH) - A40-26 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 ohms Result Result OK NG Result: 2 NG REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (ECM MAIN LINE) Result: 1 OK See step 2
  2. CHECK ECM POWER SOURCE CIRCUIT Check the ECM power source circuit. for 2ZR-FE Refer to «ECM Power Source Circuit [08/2013 - ]»(ref-635617-S39094014912014070300000) for 2ZR-FAE Refer to «ECM Power Source Circuit [08/2013 - ]»(ref-635598-S14736572592014070300000) Result Result Proceed to OK (for 2ZR-FE) A OK (for 2ZR-FAE) B NG C Result: 1 A REPLACE ECM. Refer to «REMOVAL [08/2013 - ]»(ref-635621-S35482115872014070300000) Result: 2 B REPLACE ECM. Refer to «REMOVAL [08/2013 - ]»(ref-635602-S16348185712014070300000) Result: 3 C REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

Note. Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Refer to PRECAUTION [08/2013 - ] Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again. DTC check procedure: Turn the ignition switch to ON and wait at least 20 seconds. After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed. Refer to DIAGNOSIS SYSTEM [08/2013 - 04/2014] Refer to DIAGNOSIS SYSTEM [04/2014 - ] Inspect the fuses for circuits related to this system before performing the following procedure.

HINT

  1. Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
  2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

Scheme 110

Scheme 110: PROCEDURE
Scheme 110: PROCEDURE

Scheme 111

Scheme 111
Scheme 111

Scheme 112

Scheme 112
Scheme 112
  1. CHECK FOR OPEN IN CAN BUS LINES (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the E31 main body ECU (multiplex network body ECU) connector. *a Front view of wire harness connector (to Main Body ECU (Multiplex Network Body ECU)) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E31-14 (CANH) - E31-13 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 ohms Result Result OK NG Result: 2 NG REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) Result: 1 OK See step 2
  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Disconnect the 3D driver side junction block assembly connector. Measure the resistance according to the value(s) in the table below. *a Front view of wire harness connector (to Driver Side Junction Block Assembly) Standard Resistance Tester Connection Condition Specified Condition 3D-12 (GND1) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms Disconnect the 3A driver side junction block assembly connector. Reconnect the cable to the negative (-) battery terminal. Measure the voltage according to the value(s) in the table below. *a Front view of wire harness connector (to Driver Side Junction Block Assembly) Standard Voltage Tester Connection Condition Specified Condition 3A-24 (BECU) - Body ground Always 11 to 14 V Result Result OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) Result: 1 OK See step 3
  3. INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY (IG1 NO. 1 RELAY AND ACC RELAY) Inspect the IG1 No. 1 relay and ACC relay of the driver side junction block assembly. IG signal circuit: Refer to «IG Signal Circuit [08/2013 - ]»(ref-635439-S40885147792014070300000) ACC signal circuit: Refer to «ACC Signal Circuit [08/2013 - ]»(ref-635439-S21498738932014070300000) HINT: If the IG signal circuit and ACC signal circuit have no problem, replace the main body ECU (multiplex network body ECU). Result Result OK NG Result: 1 OK REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL [08/2013 - ]»(ref-635627-S03921509152014070300000) Result: 2 NG REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL [08/2013 - ]»(ref-635627-S03921509152014070300000)

Note. Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Refer to PRECAUTION [08/2013 - ] Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again. DTC check procedure: Turn the ignition switch to ON and wait at least 31 seconds. After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed. Refer to DIAGNOSIS SYSTEM [08/2013 - 04/2014] Refer to DIAGNOSIS SYSTEM [04/2014 - ] Inspect the fuses for circuits related to this system before performing the following procedure.

HINT

  1. Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
  2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
  1. CHECK FOR OPEN IN CAN BUS LINES (COMBINATION METER ASSEMBLY MAIN LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the E43 combination meter assembly connector. *a Front view of wire harness connector (to Combination Meter Assembly) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E43-32 (CANH) - E43-31 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 ohms Result Result OK NG Result: 2 NG REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (COMBINATION METER ASSEMBLY) Result: 1 OK See step 2
  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Measure the resistance according to the value(s) in the table below. *a Front view of wire harness connector (to Combination Meter Assembly) Standard Resistance Tester Connection Condition Specified Condition E43-21 (ET) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms Reconnect the cable to the negative (-) battery terminal. *a Front view of wire harness connector (to Combination Meter Assembly) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition E43-39 (IG+) - Body ground Ignition switch ON 11 to 14 V E43-40 (B) - Body ground Always 11 to 14 V Result Result OK NG Result: 1 OK REPLACE COMBINATION METER ASSEMBLY. Refer to «REMOVAL [08/2013 - ]»(ref-635614-S03437747442014070300000) Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

Note. Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Refer to PRECAUTION [08/2013 - ] Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again. DTC check procedure: Turn the ignition switch to ON and wait at least 20 seconds. After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed. Refer to DIAGNOSIS SYSTEM [08/2013 - 04/2014] Refer to DIAGNOSIS SYSTEM [04/2014 - ] Inspect the fuses for circuits related to this system before performing the following procedure.

HINT

  1. Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
  2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

Scheme 113

Scheme 113: PROCEDURE
Scheme 113: PROCEDURE
  1. CHECK FOR OPEN IN CAN BUS LINES (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the E59 certification ECU (smart key ECU assembly) connector. *a Front view of wire harness connector (to Certification ECU (Smart Key ECU Assembly)) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E59-14 (CANH) - E59-15 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 ohms Result Result OK NG Result: 2 NG REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)) Result: 1 OK See step 2
  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Disconnect the E57 certification ECU (smart key ECU assembly) connector. *a Front view of wire harness connector (to Certification ECU (Smart Key ECU Assembly)) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E57-11 (E) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms Reconnect the cable to the negative (-) battery terminal. Measure the voltage according to the value(s) in the table below. *a Front view of wire harness connector (to Certification ECU (Smart Key ECU Assembly)) Standard Voltage Tester Connection Condition Specified Condition E57-2 (+B) - Body ground Always 11 to 14 V E59-5 (IG) - Body ground Ignition switch ON 11 to 14 V Result Result OK NG Result: 1 OK REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL [08/2013 - ]»(ref-635673-S33087994032014070300000) Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

Note. Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Refer to PRECAUTION [08/2013 - ] Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again. DTC check procedure: Turn the ignition switch to ON and wait at least 61 seconds, and then drive the vehicle at a speed of 7 km/h (4 mph) or more for 1 second or more. After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed. Refer to DIAGNOSIS SYSTEM [08/2013 - 04/2014] Refer to DIAGNOSIS SYSTEM [04/2014 - ] Inspect the fuses for circuits related to this system before performing the following procedure.

HINT

  1. Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
  2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
  1. CHECK FOR OPEN IN CAN BUS LINES (AIRBAG SENSOR ASSEMBLY BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the E14 airbag sensor assembly connector. Measure the resistance according to the value(s) in the table below. *a Front view of wire harness connector (to Airbag Sensor Assembly) Standard Resistance Tester Connection Condition Specified Condition E14-13 (CANH) - E14-22 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 ohms Result Result OK NG Result: 2 NG REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (AIRBAG SENSOR ASSEMBLY) Result: 1 OK See step 2
  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Measure the resistance according to the value(s) in the table below. *a Front view of wire harness connector (to Airbag Sensor Assembly) Standard Resistance Tester Connection Condition Specified Condition E14-25 (E1) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms E14-26 (E2) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms Reconnect the cable to the negative (-) battery terminal. Measure the voltage according to the value(s) in the table below. *a Front view of wire harness connector (to Airbag Sensor Assembly) Standard Voltage Tester Connection Condition Specified Condition E14-21 (IG2) - Body ground Ignition switch ON 11 to 14 V Result Result OK NG Result: 1 OK REPLACE AIRBAG SENSOR ASSEMBLY. Refer to «REMOVAL [08/2013 - ]»(ref-635430-S01250095462014070300000) Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

Note. Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Refer to PRECAUTION [08/2013 - ] Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again. DTC check procedure: Turn the ignition switch to ON and wait at least 31 seconds. After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed. Refer to DIAGNOSIS SYSTEM [08/2013 - 04/2014] Refer to DIAGNOSIS SYSTEM [04/2014 - ] Inspect the fuses for circuits related to this system before performing the following procedure.

HINT

  1. Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
  2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
  1. CHECK FOR OPEN IN CAN BUS LINES (RADIO AND DISPLAY RECEIVER ASSEMBLY BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the E29 radio and display receiver assembly connector. *a Front view of wire harness connector (to Radio and Display Receiver Assembly) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E29-9 (CANH) - E29-10 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 ohms Result Result OK NG Result: 2 NG REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY) Result: 1 OK See step 2
  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Disconnect the E1 radio and display receiver assembly connector. *a Front view of wire harness connector (to Radio and Display Receiver Assembly) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E1-7 (GND1) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms Reconnect the cable to the negative (-) battery terminal. Measure the voltage according to the value(s) in the table below. *a Front view of wire harness connector (to Radio and Display Receiver Assembly) Standard Voltage Tester Connection Condition Specified Condition E1-3 (ACC1) - Body ground Ignition switch ACC 11 to 14 V E1-4 (+B1) - Body ground Always 11 to 14 V E29-1 (IG) - Body ground Ignition switch ON 11 to 14 V Result Result OK NG Result: 1 OK REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to «REMOVAL [08/2013 - ]»(ref-635676-S26093754132014070300000) Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

Note. Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Refer to PRECAUTION [08/2013 - ] Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again. DTC check procedure: Turn the ignition switch to ON and wait at least 31 seconds. After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed. Refer to DIAGNOSIS SYSTEM [08/2013 - 04/2014] Refer to DIAGNOSIS SYSTEM [04/2014 - ] Inspect the fuses for circuits related to this system before performing the following procedure.

HINT

  1. Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
  2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

Scheme 114

Scheme 114: PROCEDURE
Scheme 114: PROCEDURE

Scheme 115

Scheme 115
Scheme 115

Scheme 116

Scheme 116
Scheme 116
  1. CHECK FOR OPEN IN CAN BUS LINES (NAVIGATION RECEIVER ASSEMBLY BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the E67 navigation receiver assembly connector. *a Front view of wire harness connector (to Navigation Receiver Assembly) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E67-9 (CANH) - E67-10 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 ohms Result Result OK NG Result: 2 NG REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NAVIGATION RECEIVER ASSEMBLY) Result: 1 OK See step 2
  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Disconnect the E65 Navigation receiver assembly connector. *a Front view of wire harness connector (to Navigation Receiver Assembly) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E65-7 (GND1) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms Reconnect the cable to the negative (-) battery terminal. Measure the voltage according to the value(s) in the table below. *a Front view of wire harness connector (to Navigation Receiver Assembly) Standard Voltage Tester Connection Condition Specified Condition E65-3 (ACC1) - Body ground Ignition switch ACC 11 to 14 V E65-4 (+B1) - Body ground Always 11 to 14 V E67-1 (IG) - Body ground Ignition switch ON 11 to 14 V Result Result OK NG Result: 3 OK REPLACE NAVIGATION RECEIVER ASSEMBLY. Refer to «REMOVAL [08/2013 - ]»(ref-635681-S41682384002014070300000) Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

Note. Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Refer to PRECAUTION [08/2013 - ] Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again. DTC check procedure: Turn the ignition switch to ON and wait at least 61 seconds, and then drive the vehicle at a speed of 20 km/h (12 mph) or more for 300 seconds or more. After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed. Refer to DIAGNOSIS SYSTEM [08/2013 - 04/2014] Refer to DIAGNOSIS SYSTEM [04/2014 - ]

HINT

  1. Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
  2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

Scheme 117

Scheme 117: PROCEDURE
Scheme 117: PROCEDURE

Scheme 118

Scheme 118
Scheme 118
  1. CHECK FOR OPEN IN CAN BUS LINES (DLC3 BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Measure the resistance according to the value(s) in the table below. *1 DLC3 Standard Resistance Tester Connection Condition Specified Condition E13-6 (CANH) - E13-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 ohms NOTE: When the measured value is 133 ohms or higher and a CAN communication system DTC is output, there may be a fault besides disconnection of the DLC3 branch line. For that reason, troubleshooting should be performed again from How to Proceed with Troubleshooting after repairing the trouble area. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ]»(ref-635647-S27781195552014070300000) Result Result OK NG Result: 2 NG REPAIR OR REPLACE CAN BRANCH LINE CONNECTED TO DLC3 Result: 1 OK See step 2
  2. CHECK FOR OPEN IN CAN BUS LINES (COMBINATION METER ASSEMBLY - NO. 3 CAN JUNCTION CONNECTOR) Disconnect the E43 combination meter assembly connector. *a Front view of wire harness connector (to Combination Meter Assembly) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E43-32 (CANH) - E43-31 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 ohms Result Result OK NG Result: 1 OK REPLACE COMBINATION METER ASSEMBLY. Refer to «REMOVAL [08/2013 - ]»(ref-635614-S03437747442014070300000) Result: 2 NG See step 3
  3. CHECK FOR OPEN IN CAN BUS LINES (ECM - NO. 2 CAN JUNCTION CONNECTOR) Reconnect the E43 combination meter assembly connector. Disconnect the A40 ECM connector. *a Front view of wire harness connector (to ECM) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A40-13 (CANH) - A40-26 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 ohms Result Result Proceed to OK (for 2ZR-FE) A OK (for 2ZR-FAE) B NG C Result: 1 A REPLACE ECM. Refer to «REMOVAL [08/2013 - ]»(ref-635621-S35482115872014070300000) Result: 3 B REPLACE ECM. Refer to «REMOVAL [08/2013 - ]»(ref-635602-S16348185712014070300000) Result: 2 C See step 4
  4. CHECK FOR OPEN IN CAN BUS LINES (NO. 2 CAN JUNCTION CONNECTOR) Reconnect the A40 ECM connector. Disconnect the A39 No. 2 CAN junction connector. *a Front view of wire harness connector (to No. 2 CAN Junction Connector) *b to No. 3 CAN Junction Connector *c to ECM Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Connected to A39-4 (CANH) - A39-15 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 ohms No. 3 CAN junction connector A39-6 (CANH) - A39-17 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 ohms ECM Result Result Proceed to OK A NG (ECM main line) B NG (No. 3 CAN junction connector main line) C Result: 1 A REPLACE NO. 2 CAN JUNCTION CONNECTOR Result: 2 B REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (ECM - NO. 2 CAN JUNCTION CONNECTOR) Result: 3 C See step 5
  5. CHECK FOR OPEN IN CAN BUS LINES (NO. 3 CAN JUNCTION CONNECTOR) Reconnect the A39 No. 2 CAN junction connector. Disconnect the E55 No. 3 CAN junction connector. *a Front view of wire harness connector (to No. 3 CAN Junction Connector) *b to No. 2 CAN Junction Connector *c to Combination Meter Assembly Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Connected to E55-1 (CANH) - E55-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 ohms No. 2 CAN junction connector E55-4 (CANH) - E55-15 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 ohms Combination meter assembly Result Result Proceed to OK A NG (Combination meter assembly main line) B NG (No. 2 CAN junction connector main line) C Result: 1 A REPLACE NO. 3 CAN JUNCTION CONNECTOR Result: 2 B REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (COMBINATION METER ASSEMBLY - NO. 3 CAN JUNCTION CONNECTOR) Result: 3 C REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - NO. 3 CAN JUNCTION CONNECTOR)

Note. Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Refer to PRECAUTION [08/2013 - ] Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again. DTC check procedure: Turn the ignition switch to ON and wait at least 61 seconds, and then drive the vehicle at a speed of 20 km/h (12 mph) or more for 300 seconds or more. After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed. Refer to DIAGNOSIS SYSTEM [08/2013 - 04/2014]

HINT

  1. Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
  2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

Scheme 119

Scheme 119: PROCEDURE
Scheme 119: PROCEDURE

Scheme 120

Scheme 120
Scheme 120
  1. CHECK FOR SHORT IN CAN BUS LINES (COMBINATION METER ASSEMBLY - NO. 3 CAN JUNCTION CONNECTOR) Disconnect the cable from the negative (-) battery terminal. Disconnect the E43 combination meter assembly connector. *a Front view of wire harness connector (to Combination Meter Assembly) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E43-32 (CANH) - E43-31 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 ohms Result Result OK NG Result: 1 OK REPLACE COMBINATION METER ASSEMBLY. Refer to «REMOVAL [08/2013 - ]»(ref-635614-S03437747442014070300000) Result: 2 NG See step 2
  2. CHECK FOR SHORT IN CAN BUS LINES (ECM - NO. 2 CAN JUNCTION CONNECTOR) Reconnect the E43 combination meter assembly connector. Disconnect the A40 ECM connector. *a Front view of wire harness connector (to ECM) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A40-13 (CANH) - A40-26 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 ohms Result Result Proceed to OK (for 2ZR-FE) A OK (for 2ZR-FAE) B NG C Result: 1 A REPLACE ECM. Refer to «REMOVAL [08/2013 - ]»(ref-635621-S35482115872014070300000) Result: 3 B REPLACE ECM. Refer to «REMOVAL [08/2013 - ]»(ref-635602-S16348185712014070300000) Result: 2 C See step 3
  3. CHECK FOR SHORT IN CAN BUS LINES (NO. 2 CAN JUNCTION CONNECTOR) Reconnect the A40 ECM connector. Disconnect the A39 No. 2 CAN junction connector. *a Front view of wire harness connector (to No. 2 CAN Junction Connector) *b to No. 3 CAN Junction Connector *c to Skid Control ECU (Brake Actuator Assembly) *d to ECM Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Connected to A39-4 (CANH) - A39-15 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 ohms No. 3 CAN junction connector A39-5 (CANH) - A39-16 (CANL) Cable disconnected from negative (-) battery terminal 200 ohms or higher Skid control ECU (brake actuator assembly) A39-6 (CANH) - A39-17 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 ohms ECM Result Result Proceed to OK A NG (No. 3 CAN junction connector main line) B NG (ECU or sensor branch line) C NG (ECM main line) D Result: 1 A REPLACE NO. 2 CAN JUNCTION CONNECTOR Result: 3 C See step 5 Result: 5 D REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (ECM - NO. 2 CAN JUNCTION CONNECTOR) Result: 2 B See step 4
  4. CHECK FOR SHORT IN CAN BUS LINES (NO. 3 CAN JUNCTION CONNECTOR) Reconnect the A39 No. 2 CAN junction connector. Disconnect the E55 No. 3 CAN junction connector. *a Front view of wire harness connector (to No. 3 CAN Junction Connector) *b to No. 2 CAN Junction Connector *c to Air Conditioning Amplifier Assembly (w/ Automatic Air Conditioning System or Manual Air Conditioning System) *d to Navigation Receiver Assembly (for Navigation Receiver Type) *e to Radio and Display Receiver Assembly (for Radio and Display Type) *f to Combination Meter Assembly *g to Airbag Sensor Assembly *h to Certification ECU (Smart Key ECU Assembly) (w/ Smart Key System) *i to Main Body ECU (Multiplex Network Body ECU) *j to Power Steering ECU Assembly *k to Steering Sensor *l to DLC3 Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Connected to E55-1 (CANH) - E55-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 ohms No. 2 CAN junction connector E55-2 (CANH) - E55-13 (CANL) Cable disconnected from negative (-) battery terminal 200 ohms or higher Air conditioning amplifier assembly*1 E55-3 (CANH) - E55-14 (CANL) Cable disconnected from negative (-) battery terminal 200 ohms or higher Navigation receiver assembly*2 E55-3 (CANH) - E55-14 (CANL) Cable disconnected from negative (-) battery terminal 200 ohms or higher Radio and display receiver assembly*3 E55-4 (CANH) - E55-15 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 ohms Combination meter assembly E55-5 (CANH) - E55-16 (CANL) Cable disconnected from negative (-) battery terminal 200 ohms or higher Airbag sensor assembly E55-6 (CANH) - E55-17 (CANL) Cable disconnected from negative (-) battery terminal 200 ohms or higher Certification ECU (smart key ECU assembly)*4 E55-8 (CANH) - E55-19 (CANL) Cable disconnected from negative (-) battery terminal 200 ohms or higher Main body ECU (multiplex network body ECU) E55-9 (CANH) - E55-20 (CANL) Cable disconnected from negative (-) battery terminal 200 ohms or higher Power steering ECU assembly E55-10 (CANH) - E55-21 (CANL) Cable disconnected from negative (-) battery terminal 200 ohms or higher Steering sensor E55-11 (CANH) - E55-22 (CANL) Cable disconnected from negative (-) battery terminal 1 Mohms or higher DLC3 *1: w/ Automatic Air Conditioning System or Manual Air Conditioning System *2: for Navigation Receiver Type *3: for Radio and Display Type *4: w/ Smart Key System Result Result Proceed to OK A NG (No. 2 CAN junction connector main line) B NG (ECU or sensor branch line) C NG (DLC3 branch line) D NG (Combination meter assembly main line) E Result: 1 A REPLACE NO. 3 CAN JUNCTION CONNECTOR Result: 2 B REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - NO. 3 CAN JUNCTION CONNECTOR) Result: 4 D REPAIR OR REPLACE CAN BRANCH LINE CONNECTED TO DLC3 Result: 5 E REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (COMBINATION METER ASSEMBLY - NO. 3 CAN JUNCTION CONNECTOR) Result: 3 C See step 5
  5. CHECK FOR SHORT IN CAN BUS LINES (ECU, SENSOR) Reconnect all wire harness connectors. Disconnect the connector that includes terminals CANH and CANL from the ECU (or sensor) to which the short circuited branch line is connected. Refer to «TERMINALS OF ECU [08/2013 - 04/2014]»(ref-635647-S06587681412014070300000) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E13-6 (CANH) - E13-14 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 ohms *1 DLC3 HINT: If the resistance becomes normal (between 54 and 69 ohms) when the connector is disconnected from the ECU (or sensor), there may be a short in the ECU (or sensor). Result Result OK NG Result: 1 OK REPLACE CORRESPONDING ECU OR SENSOR Result: 2 NG REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BRANCH LINES OR CONNECTOR

Note. Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Refer to PRECAUTION [08/2013 - ] Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again. DTC check procedure: Turn the ignition switch to ON and wait at least 61 seconds, and then drive the vehicle at a speed of 20 km/h (12 mph) or more for 300 seconds or more. After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed. Refer to DIAGNOSIS SYSTEM [04/2014 - ]

HINT

  1. Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
  2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
  1. CHECK FOR SHORT IN CAN BUS LINES (COMBINATION METER ASSEMBLY - NO. 3 CAN JUNCTION CONNECTOR) Disconnect the cable from the negative (-) battery terminal. Disconnect the E43 combination meter assembly connector. *a Front view of wire harness connector (to Combination Meter Assembly) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E43-32 (CANH) - E43-31 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 ohms Result Result OK NG Result: 1 OK REPLACE COMBINATION METER ASSEMBLY. Refer to «REMOVAL [08/2013 - ]»(ref-635614-S03437747442014070300000) Result: 2 NG See step 2
  2. CHECK FOR SHORT IN CAN BUS LINES (ECM - NO. 2 CAN JUNCTION CONNECTOR) Reconnect the E43 combination meter assembly connector. Disconnect the A40 ECM connector. *a Front view of wire harness connector (to ECM) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A40-13 (CANH) - A40-26 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 ohms Result Result Proceed to OK (for 2ZR-FE) A OK (for 2ZR-FAE) B NG C Result: 1 A REPLACE ECM. Refer to «REMOVAL [08/2013 - ]»(ref-635621-S35482115872014070300000) Result: 3 B REPLACE ECM. Refer to «REMOVAL [08/2013 - ]»(ref-635602-S16348185712014070300000) Result: 2 C See step 3
  3. CHECK FOR SHORT IN CAN BUS LINES (NO. 2 CAN JUNCTION CONNECTOR) Reconnect the A40 ECM connector. Disconnect the A39 No. 2 CAN junction connector. *a Front view of wire harness connector (to No. 2 CAN Junction Connector) *b to No. 3 CAN Junction Connector *c to Skid Control ECU (Brake Actuator Assembly) *d to ECM Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Connected to A39-4 (CANH) - A39-15 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 ohms No. 3 CAN junction connector A39-5 (CANH) - A39-16 (CANL) Cable disconnected from negative (-) battery terminal 200 ohms or higher Skid control ECU (brake actuator assembly) A39-6 (CANH) - A39-17 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 ohms ECM Result Result Proceed to OK A NG (No. 3 CAN junction connector main lines) B NG (ECU or sensor branch lines) C NG (ECM main lines) D Result: 1 A REPLACE NO. 2 CAN JUNCTION CONNECTOR Result: 3 C See step 5 Result: 5 D REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (ECM - NO. 2 CAN JUNCTION CONNECTOR) Result: 2 B See step 4
  4. CHECK FOR SHORT IN CAN BUS LINES (NO. 3 CAN JUNCTION CONNECTOR) Reconnect the A39 No. 2 CAN junction connector. Disconnect the E55 No. 3 CAN junction connector. *a Front view of wire harness connector (to No. 3 CAN Junction Connector) *b to No. 2 CAN Junction Connector *c to Air Conditioning Amplifier Assembly (w/ Air Conditioning System) *d to Navigation Receiver Assembly (for Navigation Receiver Type) *e to Radio and Display Receiver Assembly (for Radio and Display Type) *f to Combination Meter Assembly *g to Airbag Sensor Assembly *h to Certification ECU (Smart Key ECU Assembly) (w/ Smart Key System) *i to Main Body ECU (Multiplex Network Body ECU) *j to Power Steering ECU Assembly *k to Steering Sensor (w/ VSC) *l to DLC3 Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Connected to E55-1 (CANH) - E55-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 ohms No. 2 CAN junction connector E55-2 (CANH) - E55-13 (CANL) Cable disconnected from negative (-) battery terminal 200 ohms or higher Air conditioning amplifier assembly*1 E55-3 (CANH) - E55-14 (CANL) Cable disconnected from negative (-) battery terminal 200 ohms or higher Navigation receiver assembly*2 E55-3 (CANH) - E55-14 (CANL) Cable disconnected from negative (-) battery terminal 200 ohms or higher Radio and display receiver assembly*3 E55-4 (CANH) - E55-15 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 ohms Combination meter assembly E55-5 (CANH) - E55-16 (CANL) Cable disconnected from negative (-) battery terminal 200 ohms or higher Airbag sensor assembly E55-6 (CANH) - E55-17 (CANL) Cable disconnected from negative (-) battery terminal 200 ohms or higher Certification ECU (smart key ECU assembly)*4 E55-8 (CANH) - E55-19 (CANL) Cable disconnected from negative (-) battery terminal 200 ohms or higher Main body ECU (multiplex network body ECU) E55-9 (CANH) - E55-20 (CANL) Cable disconnected from negative (-) battery terminal 200 ohms or higher Power steering ECU assembly E55-10 (CANH) - E55-21 (CANL) Cable disconnected from negative (-) battery terminal 200 ohms or higher Steering sensor*5 E55-11 (CANH) - E55-22 (CANL) Cable disconnected from negative (-) battery terminal 1 Mohms or higher DLC3 *1: w/ Air Conditioning System *2: for Navigation Receiver Type *3: for Radio and Display Type *4: w/ Smart Key System *5: w/ VSC Result Result Proceed to OK A NG (No. 2 CAN junction connector main lines) B NG (ECU or sensor branch lines) C NG (DLC3 branch lines) D NG (Combination meter assembly main lines) E Result: 1 A REPLACE NO. 3 CAN JUNCTION CONNECTOR Result: 2 B REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - NO. 3 CAN JUNCTION CONNECTOR) Result: 4 D REPAIR OR REPLACE CAN BRANCH LINE CONNECTED TO DLC3 Result: 5 E REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (COMBINATION METER ASSEMBLY - NO. 3 CAN JUNCTION CONNECTOR) Result: 3 C See step 5
  5. CHECK FOR SHORT IN CAN BUS LINES (ECU, SENSOR) Reconnect all wire harness connectors. Disconnect the connector that includes terminals CANH and CANL from the ECU (or sensor) to which the short circuited branch lines are connected. Refer to «TERMINALS OF ECU [04/2014 - ]»(ref-635647-S42134172692014070300000) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E13-6 (CANH) - E13-14 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 ohms *1 DLC3 HINT: If the resistance becomes normal (between 54 and 69 ohms) when the connector is disconnected from the ECU (or sensor), there may be a short in the ECU (or sensor). Result Result OK NG Result: 1 OK REPLACE CORRESPONDING ECU OR SENSOR Result: 2 NG REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BRANCH LINES OR CONNECTOR

Note. Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Refer to PRECAUTION [08/2013 - ] Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again. DTC check procedure: Turn the ignition switch to ON and wait at least 61 seconds, and then drive the vehicle at a speed of 20 km/h (12 mph) or more for 300 seconds or more. After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed. Refer to DIAGNOSIS SYSTEM [08/2013 - 04/2014]

HINT

  1. Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
  2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

Scheme 121

Scheme 121: PROCEDURE
Scheme 121: PROCEDURE
  1. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 2 CAN JUNCTION CONNECTOR) Disconnect the cable from the negative (-) battery terminal. Disconnect the A39 No. 2 CAN junction connector. *1 DLC3 - - *a Front view of wire harness connector (to No. 2 CAN Junction Connector) *b to No. 3 CAN Junction Connector *c to Skid Control ECU (Brake Actuator Assembly) *d to ECM Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Connected to A39-4 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher No. 3 CAN junction connector A39-15 (CANL) - E13-16 (BAT) A39-5 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher Skid control ECU (brake actuator assembly) A39-16 (CANL) - E13-16 (BAT) A39-6 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher ECM A39-17 (CANL) - E13-16 (BAT) Result Result Proceed to OK A NG (No. 3 CAN junction connector main line) B NG (ECU or sensor bus line) C Result: 1 A REPLACE NO. 2 CAN JUNCTION CONNECTOR Result: 3 C See step 3 Result: 2 B See step 2
  2. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 3 CAN JUNCTION CONNECTOR) Reconnect the A39 No. 2 CAN junction connector. Disconnect the E55 No. 3 CAN junction connector. *1 DLC3 - - *a Front view of wire harness connector (to No. 3 CAN Junction Connector) *b to No. 2 CAN Junction Connector *c to Air Conditioning Amplifier Assembly (w/ Automatic Air Conditioning System or Manual Air Conditioning System) *d to Navigation Receiver Assembly (for Navigation Receiver Type) *e to Radio and Display Receiver Assembly (for Radio and Display Type) *f to Combination Meter Assembly *g to Airbag Sensor Assembly *h to Certification ECU (Smart Key ECU Assembly) (w/ Smart Key System) *i to Main Body ECU (Multiplex Network Body ECU) *j to Power Steering ECU Assembly *k to Steering Sensor *l to DLC3 Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Connected to E55-1 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher No. 2 CAN junction connector E55-12 (CANL) - E13-16 (BAT) E55-2 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher Air conditioning amplifier assembly*1 E55-13 (CANL) - E13-16 (BAT) E55-3 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher Navigation receiver assembly*2 E55-14 (CANL) - E13-16 (BAT) E55-3 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher Radio and display receiver assembly*3 E55-14 (CANL) - E13-16 (BAT) E55-4 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher Combination meter assembly E55-15 (CANL) - E13-16 (BAT) E55-5 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher Airbag sensor assembly E55-16 (CANL) - E13-16 (BAT) E55-6 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher Certification ECU (smart key ECU assembly)*4 E55-17 (CANL) - E13-16 (BAT) E55-8 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher Main body ECU (multiplex network body ECU) E55-19 (CANL) - E13-16 (BAT) E55-9 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher Power steering ECU assembly E55-20 (CANL) - E13-16 (BAT) E55-10 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher Steering sensor E55-21 (CANL) - E13-16 (BAT) E55-11 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher DLC3 E55-22 (CANL) - E13-16 (BAT) *1: w/ Automatic Air Conditioning System or Manual Air Conditioning System *2: for Navigation Receiver Type *3: for Radio and Display Type *4: w/ Smart Key System Result Result Proceed to OK A NG (No. 2 CAN junction connector main line) B NG (ECU or sensor bus line) C NG (DLC3 branch line) D Result: 1 A REPLACE NO. 3 CAN JUNCTION CONNECTOR Result: 2 B REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - NO. 3 CAN JUNCTION CONNECTOR) Result: 4 D REPAIR OR REPLACE CAN BRANCH LINE CONNECTED TO DLC3 Result: 3 C See step 3
  3. CHECK FOR SHORT TO +B IN CAN BUS LINE (ECU, SENSOR) Reconnect all wire harness connectors. Disconnect the ECU or sensor connected to the CAN bus line that is shorted to +B. HINT: If the ECU or sensor has multiple connectors, disconnect the connector that includes the CAN bus lines. To determine the ECU or sensor that is connected to the shorted bus line, refer to Terminals of ECU. Refer to «TERMINALS OF ECU [08/2013 - 04/2014]»(ref-635647-S06587681412014070300000) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E13-6 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher E13-14 (CANL) - E13-16 (BAT) *1 DLC3 HINT: If the resistance changes to 6 kohms or higher when the connector is disconnected from the ECU (or sensor), there may be a short in the ECU (or sensor). Result Result OK NG Result: 1 OK REPLACE CORRESPONDING ECU OR SENSOR Result: 2 NG REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BRANCH LINES OR CONNECTOR

Note. Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Refer to PRECAUTION [08/2013 - ] Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again. DTC check procedure: Turn the ignition switch to ON and wait at least 61 seconds, and then drive the vehicle at a speed of 20 km/h (12 mph) or more for 300 seconds or more. After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed. Refer to DIAGNOSIS SYSTEM [04/2014 - ]

HINT

  1. Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
  2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
  1. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 2 CAN JUNCTION CONNECTOR) Disconnect the cable from the negative (-) battery terminal. Disconnect the A39 No. 2 CAN junction connector. *1 DLC3 - - *a Front view of wire harness connector (to No. 2 CAN Junction Connector) *b to No. 3 CAN Junction Connector *c to Skid Control ECU (Brake Actuator Assembly) *d to ECM Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Connected to A39-4 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher No. 3 CAN junction connector A39-15 (CANL) - E13-16 (BAT) A39-5 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher Skid control ECU (brake actuator assembly) A39-16 (CANL) - E13-16 (BAT) A39-6 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher ECM A39-17 (CANL) - E13-16 (BAT) Result Result Proceed to OK A NG (No. 3 CAN junction connector main line) B NG (ECU or sensor bus line) C Result: 1 A REPLACE NO. 2 CAN JUNCTION CONNECTOR Result: 3 C See step 3 Result: 2 B See step 2
  2. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 3 CAN JUNCTION CONNECTOR) Reconnect the A39 No. 2 CAN junction connector. Disconnect the E55 No. 3 CAN junction connector. *1 DLC3 - - *a Front view of wire harness connector (to No. 3 CAN Junction Connector) *b to No. 2 CAN Junction Connector *c to Air Conditioning Amplifier Assembly (w/ Air Conditioning System) *d to Navigation Receiver Assembly (for Navigation Receiver Type) *e to Radio and Display Receiver Assembly (for Radio and Display Type) *f to Combination Meter Assembly *g to Airbag Sensor Assembly *h to Certification ECU (Smart Key ECU Assembly) (w/ Smart Key System) *i to Main Body ECU (Multiplex Network Body ECU) *j to Power Steering ECU Assembly *k to Steering Sensor (w/ VSC) *l to DLC3 Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Connected to E55-1 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher No. 2 CAN junction connector E55-12 (CANL) - E13-16 (BAT) E55-2 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher Air conditioning amplifier assembly*1 E55-13 (CANL) - E13-16 (BAT) E55-3 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher Navigation receiver assembly*2 E55-14 (CANL) - E13-16 (BAT) E55-3 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher Radio and display receiver assembly*3 E55-14 (CANL) - E13-16 (BAT) E55-4 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher Combination meter assembly E55-15 (CANL) - E13-16 (BAT) E55-5 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher Airbag sensor assembly E55-16 (CANL) - E13-16 (BAT) E55-6 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher Certification ECU (smart key ECU assembly)*4 E55-17 (CANL) - E13-16 (BAT) E55-8 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher Main body ECU (multiplex network body ECU) E55-19 (CANL) - E13-16 (BAT) E55-9 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher Power steering ECU assembly E55-20 (CANL) - E13-16 (BAT) E55-10 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher Steering sensor*5 E55-21 (CANL) - E13-16 (BAT) E55-11 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher DLC3 E55-22 (CANL) - E13-16 (BAT) *1: w/ Air Conditioning System *2: for Navigation Receiver Type *3: for Radio and Display Type *4: w/ Smart Key System *5: w/ VSC Result Result Proceed to OK A NG (No. 2 CAN junction connector main line) B NG (ECU or sensor bus line) C NG (DLC3 branch line) D Result: 1 A REPLACE NO. 3 CAN JUNCTION CONNECTOR Result: 2 B REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - NO. 3 CAN JUNCTION CONNECTOR) Result: 4 D REPAIR OR REPLACE CAN BRANCH LINE CONNECTED TO DLC3 Result: 3 C See step 3
  3. CHECK FOR SHORT TO +B IN CAN BUS LINE (ECU, SENSOR) Reconnect all wire harness connectors. Disconnect the ECU or sensor connected to the CAN bus line that is shorted to +B. HINT: If the ECU or sensor has multiple connectors, disconnect the connector that includes the CAN bus lines. To determine the ECU or sensor that is connected to the shorted bus line, refer to Terminals of ECU. Refer to «TERMINALS OF ECU [04/2014 - ]»(ref-635647-S42134172692014070300000) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E13-6 (CANH) - E13-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kohms or higher E13-14 (CANL) - E13-16 (BAT) *1 DLC3 HINT: If the resistance changes to 6 kohms or higher when the connector is disconnected from the ECU (or sensor), there may be a short in the ECU (or sensor). Result Result OK NG Result: 1 OK REPLACE CORRESPONDING ECU OR SENSOR Result: 2 NG REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BUS LINE OR CONNECTOR

Note. Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Refer to PRECAUTION [08/2013 - ] Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again. DTC check procedure: Turn the ignition switch to ON and wait at least 61 seconds, and then drive the vehicle at a speed of 20 km/h (12 mph) or more for 300 seconds or more. After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed. Refer to DIAGNOSIS SYSTEM [08/2013 - 04/2014]

HINT

  1. Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
  2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

Scheme 122

Scheme 122: PROCEDURE
Scheme 122: PROCEDURE
  1. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 2 CAN JUNCTION CONNECTOR) Disconnect the cable from the negative (-) battery terminal. Disconnect the A39 No. 2 CAN junction connector. *1 DLC3 - - *a Front view of wire harness connector (to No. 2 CAN Junction Connector) *b to No. 3 CAN Junction Connector *c to Skid Control ECU (Brake Actuator Assembly) *d to ECM Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Connected to A39-4 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher No. 3 CAN junction connector A39-15 (CANL) - E13-4 (CG) A39-5 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher Skid control ECU (brake actuator assembly) A39-16 (CANL) - E13-4 (CG) A39-6 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher ECM A39-17 (CANL) - E13-4 (CG) Result Result Proceed to OK A NG (No. 3 CAN junction connector main line) B NG (ECU or sensor bus line) C Result: 1 A REPLACE NO. 2 CAN JUNCTION CONNECTOR Result: 3 C See step 3 Result: 2 B See step 2
  2. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 3 CAN JUNCTION CONNECTOR) Reconnect the A39 No. 2 CAN junction connector. Disconnect the E55 No. 3 CAN junction connector. *1 DLC3 - - *a Front view of wire harness connector (to No. 3 CAN Junction Connector) *b to No. 2 CAN Junction Connector *c to Air Conditioning Amplifier Assembly (w/ Automatic Air Conditioning System or Manual Air Conditioning System) *d to Navigation Receiver Assembly (for Navigation Receiver Type) *e to Radio and Display Receiver Assembly (for Radio and Display Type) *f to Combination Meter Assembly *g to Airbag Sensor Assembly *h to Certification ECU (Smart Key ECU Assembly) (w/ Smart Key System) *i to Main Body ECU (Multiplex Network Body ECU) *j to Power Steering ECU Assembly *k to Steering Sensor *l to DLC3 Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Connected to E55-1 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher No. 2 CAN junction connector E55-12 (CANL) - E13-4 (CG) E55-2 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher Air conditioning amplifier assembly*1 E55-13 (CANL) - E13-4 (CG) E55-3 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher Navigation receiver assembly*2 E55-14 (CANL) - E13-4 (CG) E55-3 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher Radio and display receiver assembly*3 E55-14 (CANL) - E13-4 (CG) E55-4 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher Combination meter assembly E55-15 (CANL) - E13-4 (CG) E55-5 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher Airbag sensor assembly E55-16 (CANL) - E13-4 (CG) E55-6 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher Certification ECU (smart key ECU assembly)*4 E55-17 (CANL) - E13-4 (CG) E55-8 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher Main body ECU (multiplex network body ECU) E55-19 (CANL) - E13-4 (CG) E55-9 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher Power steering ECU assembly E55-20 (CANL) - E13-4 (CG) E55-10 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher Steering sensor E55-21 (CANL) - E13-4 (CG) E55-11 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher DLC3 E55-22 (CANL) - E13-4 (CG) *1: w/ Automatic Air Conditioning System or Manual Air Conditioning System *2: for Navigation Receiver Type *3: for Radio and Display Type *4: w/ Smart Key System Result Result Proceed to OK A NG (No. 2 CAN junction connector main line) B NG (ECU or sensor bus line) C NG (DLC3 branch line) D Result: 1 A REPLACE NO. 3 CAN JUNCTION CONNECTOR Result: 2 B REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - NO. 3 CAN JUNCTION CONNECTOR) Result: 4 D REPAIR OR REPLACE CAN BRANCH LINE CONNECTED TO DLC3 Result: 3 C See step 3
  3. CHECK FOR SHORT TO GND IN CAN BUS LINE (ECU, SENSOR) Reconnect all wire harness connectors. Disconnect the ECU or sensor connected to the CAN bus line that is shorted to ground. HINT: If the ECU or sensor has multiple connectors, disconnect the connector that includes the CAN bus lines. To determine the ECU or sensor that is connected to the shorted bus line, refer to Terminals of ECU. Refer to «TERMINALS OF ECU [08/2013 - 04/2014]»(ref-635647-S06587681412014070300000) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E13-6 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher E13-14 (CANL) - E13-4 (CG) *1 DLC3 HINT: If the resistance changes to 200 ohms or higher when the connector is disconnected from the ECU (or sensor), there may be a short in the ECU (or sensor). Result Result OK NG Result: 1 OK REPLACE CORRESPONDING ECU OR SENSOR Result: 2 NG REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BRANCH LINES OR CONNECTOR

Note. Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Refer to PRECAUTION [08/2013 - ] Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again. DTC check procedure: Turn the ignition switch to ON and wait at least 61 seconds, and then drive the vehicle at a speed of 20 km/h (12 mph) or more for 300 seconds or more. After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed. Refer to DIAGNOSIS SYSTEM [04/2014 - ]

HINT

  1. Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
  2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
  1. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 2 CAN JUNCTION CONNECTOR) Disconnect the cable from the negative (-) battery terminal. Disconnect the A39 No. 2 CAN junction connector. *1 DLC3 - - *a Front view of wire harness connector (to No. 2 CAN Junction Connector) *b to No. 3 CAN Junction Connector *c to Skid Control ECU (Brake Actuator Assembly) *d to ECM Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Connected to A39-4 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher No. 3 CAN junction connector A39-15 (CANL) - E13-4 (CG) A39-5 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher Skid control ECU (brake actuator assembly) A39-16 (CANL) - E13-4 (CG) A39-6 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher ECM A39-17 (CANL) - E13-4 (CG) Result Result Proceed to OK A NG (No. 3 CAN junction connector main line) B NG (ECU or sensor bus line) C Result: 1 A REPLACE NO. 2 CAN JUNCTION CONNECTOR Result: 3 C See step 3 Result: 2 B See step 2
  2. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 3 CAN JUNCTION CONNECTOR) Reconnect the A39 No. 2 CAN junction connector. Disconnect the E55 No. 3 CAN junction connector. *1 DLC3 - - *a Front view of wire harness connector (to No. 3 CAN Junction Connector) *b to No. 2 CAN Junction Connector *c to Air Conditioning Amplifier Assembly (w/ Air Conditioning System) *d to Navigation Receiver Assembly (for Navigation Receiver Type) *e to Radio and Display Receiver Assembly (for Radio and Display Type) *f to Combination Meter Assembly *g to Airbag Sensor Assembly *h to Certification ECU (Smart Key ECU Assembly) (w/ Smart Key System) *i to Main Body ECU (Multiplex Network Body ECU) *j to Power Steering ECU Assembly *k to Steering Sensor (w/ VSC) *l to DLC3 Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Connected to E55-1 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher No. 2 CAN junction connector E55-12 (CANL) - E13-4 (CG) E55-2 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher Air conditioning amplifier assembly*1 E55-13 (CANL) - E13-4 (CG) E55-3 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher Navigation receiver assembly*2 E55-14 (CANL) - E13-4 (CG) E55-3 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher Radio and display receiver assembly*3 E55-14 (CANL) - E13-4 (CG) E55-4 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher Combination meter assembly E55-15 (CANL) - E13-4 (CG) E55-5 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher Airbag sensor assembly E55-16 (CANL) - E13-4 (CG) E55-6 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher Certification ECU (smart key ECU assembly)*4 E55-17 (CANL) - E13-4 (CG) E55-8 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher Main body ECU (multiplex network body ECU) E55-19 (CANL) - E13-4 (CG) E55-9 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher Power steering ECU assembly E55-20 (CANL) - E13-4 (CG) E55-10 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher Steering sensor*5 E55-21 (CANL) - E13-4 (CG) E55-11 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher DLC3 E55-22 (CANL) - E13-4 (CG) *1: w/ Air Conditioning System *2: for Navigation Receiver Type *3: for Radio and Display Type *4: w/ Smart Key System *5: w/ VSC Result Result Proceed to OK A NG (No. 2 CAN junction connector main line) B NG (ECU or sensor bus line) C NG (DLC3 branch line) D Result: 1 A REPLACE NO. 3 CAN JUNCTION CONNECTOR Result: 2 B REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - NO. 3 CAN JUNCTION CONNECTOR) Result: 4 D REPAIR OR REPLACE CAN BRANCH LINE CONNECTED TO DLC3 Result: 3 C See step 3
  3. CHECK FOR SHORT TO GND IN CAN BUS LINE (ECU, SENSOR) Reconnect all wire harness connectors. Disconnect the ECU or sensor connected to the CAN bus line that is shorted to ground. HINT: If the ECU or sensor has multiple connectors, disconnect the connector that includes the CAN bus lines. To determine the ECU or sensor that is connected to the shorted bus line, refer to Terminals of ECU. Refer to «TERMINALS OF ECU [04/2014 - ]»(ref-635647-S42134172692014070300000) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E13-6 (CANH) - E13-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher E13-14 (CANL) - E13-4 (CG) *1 DLC3 HINT: If the resistance changes to 200 ohms or higher when the connector is disconnected from the ECU (or sensor), there may be a short in the ECU (or sensor). Result Result OK NG Result: 1 OK REPLACE CORRESPONDING ECU OR SENSOR Result: 2 NG REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BUS LINE OR CONNECTOR

Note. Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed. Refer to DIAGNOSIS SYSTEM [08/2013 - 04/2014] After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again. DTC check procedure: Turn the ignition switch to ON and wait at least 61 seconds, and then drive the vehicle at a speed of 20 km/h (12 mph) or more for 300 seconds or more.

HINT

Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

  1. CHECK FOR OPEN IN ONE SIDE OF V BUS BRANCH LINE Based on the vehicle equipment and specifications, confirm the systems that use CAN communication. Refer to «DIAGNOSIS SYSTEM [08/2013 - 04/2014]»(ref-635647-S40458511452014070300000) Using the Techstream, select and perform the CAN bus check. Refer to «DIAGNOSIS SYSTEM [08/2013 - 04/2014]»(ref-635647-S40458511452014070300000) CAN Bus Check Observe the screen for approximately 2 minutes to check the ECUs and sensors that are not displayed on the screen and also those that repeatedly appear and disappear from the screen. Check the applicable communication stop mode for the ECU or sensor that is not displayed on the screen. Result Proceed to NEXT Result: 1 NEXT GO TO CORRESPONDING COMMUNICATION STOP MODE. Refer to «PROBLEM SYMPTOMS TABLE [08/2013 - ]»(ref-635647-S21839767952014070300000)

Note. Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed. Refer to DIAGNOSIS SYSTEM [04/2014 - ] After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again. DTC check procedure: Turn the ignition switch to ON and wait at least 61 seconds, and then drive the vehicle at a speed of 20 km/h (12 mph) or more for 300 seconds or more.

HINT

Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

  1. CHECK FOR OPEN IN ONE SIDE OF V BUS BRANCH LINE Based on the vehicle equipment and specifications, confirm the systems that use CAN communication. Refer to «DIAGNOSIS SYSTEM [04/2014 - ]»(ref-635652-S02842089492014070300000) Using the Techstream, select and perform the CAN bus check. Refer to «DIAGNOSIS SYSTEM [04/2014 - ]»(ref-635652-S02842089492014070300000) CAN Bus Check Observe the screen for approximately 2 minutes to check the ECUs and sensors that are not displayed on the screen and also those that repeatedly appear and disappear from the screen. Check the applicable communication stop mode for the ECU or sensor that is not displayed on the screen. Result Proceed to NEXT Result: 1 NEXT GO TO CORRESPONDING COMMUNICATION STOP MODE. Refer to «PROBLEM SYMPTOMS TABLE [08/2013 - ]»(ref-635647-S21839767952014070300000)

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