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CAN Communication System (Diagnostics - Introduction): Other Scion tC II рестайлинг

Communication Devices 22 illustrations ~7217 words

PRECAUTION [01/2014 - ]

  1. IGNITION SWITCH EXPRESSION HINT: The type of ignition switch used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are used in this Service Information. Expression Ignition Switch (Position) Engine Switch (Condition) Ignition Switch off LOCK Off (Lock) Ignition Switch ON ON On (IG) Ignition Switch ACC ACC On (ACC) Engine Start START On (Start)
  2. STEERING SYSTEM HANDLING PRECAUTIONS Care must be taken when replacing parts. Incorrect replacement could affect the performance of the steering system and result in hazards when driving.
  3. SRS AIRBAG SYSTEM HANDLING PRECAUTIONS This vehicle is equipped with an SRS (Supplemental Restraint System), which includes components such as the driver airbag and front passenger side airbag. Failure to carry out service operations in the correct sequence could cause unexpected SRS deployment during servicing and may lead to a serious accident. Before servicing (including installation/removal, inspection and replacement of parts), be sure to read the precautionary notice for the Supplemental Restraint System. Refer to «PRECAUTION [01/2014 - ]»(ref-615289-S05356892732014050900000) .
  4. BUS LINE REPAIR After repairing the bus line with solder, wrap the repaired part with vinyl tape. Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE [05/2013 - ]»(ref-615109-S05659225472014050900000) . NOTE: The CANL bus line and CANH bus line must be installed together. When installing the CAN bus lines, make sure to twist them. CAN bus lines are likely to be influenced by noise if the bus lines are not twisted together. Leave approximately 80 mm (3.15 in.) loose in the twisted wires around the connectors. Do not use by-pass wiring between the connectors. NOTE: The protective effect of the twisted wire harness will be lost if bypass wiring is used. TEXT IN ILLUSTRATION *1 By-pass Wire
  5. CONNECTOR HANDLING When inserting probes into a connector, insert them from the rear of the connector. TEXT IN ILLUSTRATION *1 Tester Probe Use a repair wire to check the connector if it is impossible to check resistance from the rear of the connector. TEXT IN ILLUSTRATION *1 Repair Wire

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Scheme 10: ILLUSTRATION
Scheme 10: ILLUSTRATION

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Scheme 11: ILLUSTRATION
Scheme 11: ILLUSTRATION

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Scheme 12: ILLUSTRATION
Scheme 12: ILLUSTRATION

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Scheme 13: SYSTEM DIAGRAM [05/2013 - ]
Scheme 13: SYSTEM DIAGRAM [05/2013 - ]

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Scheme 17
  1. SYSTEM DIAGRAM No. ECU/Sensor Name 1 ECM 2 Combination meter assembly 3 Power source control ECU*1 4 Brake actuator assembly (skid control ECU) 5 Spiral with sensor cable sub-assembly (steering angle sensor) 6 Air conditioning amplifier assembly 7 Airbag sensor assembly 8 Power steering ECU assembly 9 Main body ECU (multiplex network body ECU) 10 DLC3 11 Certification ECU (smart key ECU assembly)*1 12 Transmission control ECU assembly*2 *1: w/ Smart Key System *2: for Automatic Transaxle
  2. V1 BUS
  3. POWER MANAGEMENT BUS (w/ Smart Key System)
  4. POWERTRAIN BUS (for Automatic Transaxle)

TERMINALS OF ECU [05/2013 - 01/2014]

HINT

Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

Scheme 18

Scheme 18: TERMINALS OF ECU [05/2013 - 01/2014]
Scheme 18: TERMINALS OF ECU [05/2013 - 01/2014]

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  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL Disconnect the cable from the negative (-) battery terminal before measuring the resistance of the CAN main wire and CAN branch wire. WARNING: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the airbag system. NOTE: Before measuring the resistance, leave the vehicle for at least 1 minute and do not operate the ignition switch, any switches or any doors. If doors need to be opened in order to check connectors, open the doors and leave them open. When disconnecting the cable, some systems need to be initialized after the cable is reconnected. Refer to «INITIALIZATION [05/2013 - 01/2014]»(ref-615109-S22240423792014050900000) .
  2. JUNCTION CONNECTOR NO. 1 JUNCTION CONNECTOR TEXT IN ILLUSTRATION *a for Brake Actuator Assembly (Skid Control ECU) *b for No. 2 Junction Connector *c for ECM (V1 Bus) - - No. 1 Junction Connector Wiring Color Connect to A34-9 (CANH) R Brake actuator assembly (skid control ECU) A34-20 (CANL) W A34-10 (CANH) B No. 2 junction connector A34-21 (CANL) W A34-11 (CANH) Y ECM (V1 bus) A34-22 (CANL) W NO. 2 JUNCTION CONNECTOR TEXT IN ILLUSTRATION *a for Certification ECU (Smart Key ECU Assembly) (w/ Smart Key System) *b for Combination Meter Assembly *c for Power Steering ECU Assembly *d for Air Conditioning Amplifier Assembly *e for Spiral with Sensor Cable Sub-assembly (Steering Angle Sensor) *f for DLC3 *g for Main Body ECU (Multiplex Network Body ECU) *h for Airbag Sensor Assembly *i for No. 1 Junction Connector *j for Power Source Control ECU (V1 Bus) (w/ Smart Key System) No. 2 Junction Connector Wiring Color Connect to C65-1 (CANH) LG Certification ECU (smart key ECU assembly)* C65-12 (CANL) W C65-2 (CANH) GR Combination meter assembly C65-13 (CANL) W C65-3 (CANH) L Power steering ECU assembly C65-14 (CANL) W C65-4 (CANH) V Air conditioning amplifier assembly C65-15 (CANL) W C65-5 (CANH) BR Spiral with sensor cable sub-assembly (steering angle sensor) C65-16 (CANL) W C65-7 (CANH) LG DLC3 C65-18 (CANL) W C65-8 (CANH) R Main body ECU (multiplex network body ECU) C65-19 (CANL) W C65-9 (CANH) Y Airbag sensor assembly C65-20 (CANL) W C65-10 (CANH) B No. 1 junction connector C65-21 (CANL) W C65-11 (CANH) B Power source control ECU (V1 bus)* C65-22 (CANL) W *: w/ Smart Key System
  3. CHECK DLC3 Disconnect the cable from the negative (-) battery terminal before measuring the resistance of the CAN main wire and CAN branch wire. WARNING: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the airbag system. NOTE: When disconnecting the cable, some systems need to be initialized after the cable is reconnected. Refer to «INITIALIZATION [05/2013 - 01/2014]»(ref-615109-S22240423792014050900000) . Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition C13-6 (CANH) - C13-14 (CANL) LG - W Ignition switch off 54 to 69 ohms C13-6 (CANH) - C13-4 (CG) LG - W-B Ignition switch off 200 ohms or higher C13-14 (CANL) - C13-4 (CG) W - W-B Ignition switch off 200 ohms or higher C13-6 (CANH) - C13-16 (BAT) LG - G Ignition switch off 6 kohms or higher C13-14 (CANL) - C13-16 (BAT) W - G Ignition switch off 6 kohms or higher
  4. CHECK ECM TEXT IN ILLUSTRATION *A for V1 Bus *B for Power Management Bus *C for Powertrain Bus - - Disconnect the A35 and B30 ECM connectors. Measure the resistance according to the value(s) in the table below. FOR V1 BUS Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition A35-13 (CANH) - A35-5 (CANL) Y - W Ignition switch off 108 to 132 ohms A35-13 (CANH) - B30-104 (E1) Y - BR Ignition switch off 200 ohms or higher A35-5 (CANL) - B30-104 (E1) W - BR Ignition switch off 200 ohms or higher A35-13 (CANH) - A35-20 (BATT) Y - P Ignition switch off 6 kohms or higher A35-5 (CANL) - A35-20 (BATT) W - P Ignition switch off 6 kohms or higher FOR POWER MANAGEMENT BUS Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition A35-12 (CANP) - A35-4 (CANN) W - G Ignition switch off 108 to 132 ohms A35-12 (CANP) - B30-104 (E1) W - BR Ignition switch off 200 ohms or higher A35-4 (CANN) - B30-104 (E1) G - BR Ignition switch off 200 ohms or higher A35-12 (CANP) - A35-20 (BATT) W - P Ignition switch off 6 kohms or higher A35-4 (CANN) - A35-20 (BATT) G - P Ignition switch off 6 kohms or higher FOR POWERTRAIN BUS Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition B30-24 (CAN+) - B30-1 (CAN-) R - G Ignition switch off 108 to 132 ohms B30-24 (CAN+) - B30-104 (E1) R - BR Ignition switch off 200 ohms or higher B30-1 (CAN-) - B30-104 (E1) G - BR Ignition switch off 200 ohms or higher B30-24 (CAN+) - A35-20 (BATT) R - P Ignition switch off 6 kohms or higher B30-1 (CAN-) - A35-20 (BATT) G - P Ignition switch off 6 kohms or higher
  5. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) TEXT IN ILLUSTRATION *1 Main Body ECU (Multiplex Network Body ECU) - - Remove the main body ECU (multiplex network body ECU). Refer to «REMOVAL [05/2013 - 01/2014]»(ref-615304-S21964422262014050900000) . Reconnect the 2B and 2D instrument panel junction block assembly connectors. Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition C56-14 (CANH) - C56-13 (CANL) R - W Ignition switch off 54 to 69 ohms C56-14 (CANH) - A-11 (GND1) R - None Ignition switch off 200 ohms or higher C56-13 (CANL) - A-11 (GND1) W - None Ignition switch off 200 ohms or higher C56-14 (CANH) - A-30 (BECU) R - None Ignition switch off 6 kohms or higher C56-13 (CANL) - A-30 (BECU) W - None Ignition switch off 6 kohms or higher
  6. CHECK BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) Disconnect the A36 brake actuator assembly (skid control ECU) connector. Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition A36-25 (CANH) - A36-14 (CANL) R - W Ignition switch off 54 to 69 ohms A36-25 (CANH) - A36-1 (GND1) R - B Ignition switch off 200 ohms or higher A36-14 (CANL) - A36-1 (GND1) W - B Ignition switch off 200 ohms or higher A36-25 (CANH) - A36-12 (+BS) R - W Ignition switch off 6 kohms or higher A36-14 (CANL) - A36-12 (+BS) W - W Ignition switch off 6 kohms or higher
  7. CHECK SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY (STEERING ANGLE SENSOR) Disconnect the C53 spiral with sensor cable sub-assembly (steering angle sensor) connector. Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition C53-4 (CANH) - C53-3 (CANL) BR - W Ignition switch off 54 to 69 ohms C53-4 (CANH) - C53-2 (ESS) BR - W-B Ignition switch off 200 ohms or higher C53-3 (CANL) - C53-2 (ESS) W - W-B Ignition switch off 200 ohms or higher C53-4 (CANH) - C53-6 (BAT) BR - B Ignition switch off 6 kohms or higher C53-3 (CANL) - C53-6 (BAT) W - B Ignition switch off 6 kohms or higher
  8. CHECK AIRBAG SENSOR ASSEMBLY Disconnect the C20 airbag sensor assembly connector. Refer to «REMOVAL [05/2013 - 01/2014]»(ref-615288-S17874240432014050900000) . Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition C20-13 (CANH) - C20-22 (CANL) Y - W Ignition switch off 54 to 69 ohms C20-13 (CANH) - C20-25 (E1) Y - W-B Ignition switch off 200 ohms or higher C20-22 (CANL) - C20-25 (E1) W - W-B Ignition switch off 200 ohms or higher C20-13 (CANH) - C13-16 (BAT) Y - G Ignition switch off 6 kohms or higher C20-22 (CANL) - C13-16 (BAT) W - G Ignition switch off 6 kohms or higher
  9. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (w/ Smart Key System) Disconnect the C35 certification ECU (smart key ECU assembly) connector. Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition C35-9 (CANH) - C35-10 (CANL) LG - W Ignition switch off 54 to 69 ohms C35-9 (CANH) - C35-15 (E) LG - BR Ignition switch off 200 ohms or higher C35-10 (CANL) - C35-15 (E) W - BR Ignition switch off 200 ohms or higher C35-9 (CANH) - C35-1 (+B) LG - LG Ignition switch off 6 kohms or higher C35-10 (CANL) - C35-1 (+B) W - LG Ignition switch off 6 kohms or higher
  10. CHECK POWER SOURCE CONTROL ECU (w/ Smart Key System) TEXT IN ILLUSTRATION *A for V1 Bus *B for Power Management Bus Disconnect the C43 power source control ECU connector. Measure the resistance according to the value(s) in the table below. FOR V1 BUS Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition C43-14 (CA1H) - C43-13 (CA1L) B - W Ignition switch off 54 to 69 ohms C43-14 (CA1H) - C43-6 (GND) B - W-B Ignition switch off 200 ohms or higher C43-13 (CA1L) - C43-6 (GND) W - W-B Ignition switch off 200 ohms or higher C43-14 (CA1H) - C43-1 (AM22) B - R Ignition switch off 6 kohms or higher C43-13 (CA1L) - C43-1 (AM22) W - R Ignition switch off 6 kohms or higher FOR POWER MANAGEMENT BUS Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition C43-12 (CA3P) - C43-11 (CA3N) LG - G Ignition switch off 108 to 132 ohms C43-12 (CA3P) - C43-6 (GND) LG - W-B Ignition switch off 200 ohms or higher C43-11 (CA3N) - C43-6 (GND) G - W-B Ignition switch off 200 ohms or higher C43-12 (CA3P) - C43-1 (AM22) LG - R Ignition switch off 6 kohms or higher C43-11 (CA3N) - C43-1 (AM22) G - R Ignition switch off 6 kohms or higher
  11. CHECK COMBINATION METER ASSEMBLY Disconnect the C50 combination meter assembly connector. Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition C50-8 (CANH) - C50-9 (CANL) GR - W Ignition switch off 108 to 132 ohms C50-8 (CANH) - C50-7 (ET) GR - W-B Ignition switch off 200 ohms or higher C50-9 (CANL) - C50-7 (ET) W - W-B Ignition switch off 200 ohms or higher C50-8 (CANH) - C50-5 (B) GR - W Ignition switch off 6 kohms or higher C50-9 (CANL) - C50-5 (B) W - W Ignition switch off 6 kohms or higher
  12. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY Disconnect the C32 air conditioning amplifier assembly connector. Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition C32-8 (CANH) - C32-9 (CANL) V - W Ignition switch off 54 to 69 ohms C32-8 (CANH) - C32-24 (GND) V - W-B Ignition switch off 200 ohms or higher C32-9 (CANL) - C32-24 (GND) W - W-B Ignition switch off 200 ohms or higher C32-8 (CANH) - C13-16 (BAT) V - G Ignition switch off 6 kohms or higher C32-9 (CANL) - C13-16 (BAT) W - G Ignition switch off 6 kohms or higher
  13. CHECK POWER STEERING ECU ASSEMBLY Disconnect the A26 and C48 power steering ECU assembly connectors. Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition C48-1 (CANH) - C48-7 (CANL) L - W Ignition switch off 54 to 69 ohms C48-1 (CANH) - A26-2 (PGND) L - W-B Ignition switch off 200 ohms or higher C48-7 (CANL) - A26-2 (PGND) W - W-B Ignition switch off 200 ohms or higher C48-1 (CANH) - A26-1 (PIG) L - L Ignition switch off 6 kohms or higher C48-7 (CANL) - A26-1 (PIG) W - L Ignition switch off 6 kohms or higher
  14. CHECK TRANSMISSION CONTROL ECU ASSEMBLY (for Automatic Transaxle) Disconnect the B31 transmission control ECU assembly connector. Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition B31-6 (CAN+) - B31-7 (CAN-) R - G Ignition switch off 108 to 132 ohms B31-6 (CAN+) - B31-8 (E1) R - W-B Ignition switch off 200 ohms or higher B31-7 (CAN-) - B31-8 (E1) G - W-B Ignition switch off 200 ohms or higher B31-6 (CAN+) - B31-1 (BATT) R - P Ignition switch off 6 kohms or higher B31-7 (CAN-) - B31-1 (BATT) G - P Ignition switch off 6 kohms or higher

TERMINALS OF ECU [01/2014 - ]

HINT

Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL Disconnect the cable from the negative (-) battery terminal before measuring the resistance of the CAN main wire and CAN branch wire. WARNING: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the airbag system. NOTE: Before measuring the resistance, leave the vehicle for at least 1 minute and do not operate the ignition switch, any switches or any doors. If doors need to be opened in order to check connectors, open the doors and leave them open. When disconnecting the cable, some systems need to be initialized after the cable is reconnected. Refer to «INITIALIZATION [01/2014 - ]»(ref-615109-S31931454042014050900000) .
  2. JUNCTION CONNECTOR NO. 1 JUNCTION CONNECTOR TEXT IN ILLUSTRATION *a for Brake Actuator Assembly (Skid Control ECU) *b for No. 2 Junction Connector *c for ECM (V1 Bus) - - No. 1 Junction Connector Wiring Color Connect to A34-9 (CANH) R Brake actuator assembly (skid control ECU) A34-20 (CANL) W A34-10 (CANH) B No. 2 junction connector A34-21 (CANL) W A34-11 (CANH) Y ECM (V1 bus) A34-22 (CANL) W NO. 2 JUNCTION CONNECTOR TEXT IN ILLUSTRATION *a for Certification ECU (Smart Key ECU Assembly) (w/ Smart Key System) *b for Combination Meter Assembly *c for Power Steering ECU Assembly *d for Air Conditioning Amplifier Assembly *e for Spiral with Sensor Cable Sub-assembly (Steering Angle Sensor) *f for DLC3 *g for Main Body ECU (Multiplex Network Body ECU) *h for Airbag Sensor Assembly *i for No. 1 Junction Connector *j for Power Source Control ECU (V1 Bus) (w/ Smart Key System) No. 2 Junction Connector Wiring Color Connect to C65-1 (CANH) LG Certification ECU (smart key ECU assembly)* C65-12 (CANL) W C65-2 (CANH) GR Combination meter assembly C65-13 (CANL) W C65-3 (CANH) L Power steering ECU assembly C65-14 (CANL) W C65-4 (CANH) V Air conditioning amplifier assembly C65-15 (CANL) W C65-5 (CANH) BR Spiral with sensor cable sub-assembly (steering angle sensor) C65-16 (CANL) W C65-7 (CANH) LG DLC3 C65-18 (CANL) W C65-8 (CANH) R Main body ECU (multiplex network body ECU) C65-19 (CANL) W C65-9 (CANH) Y Airbag sensor assembly C65-20 (CANL) W C65-10 (CANH) B No. 1 junction connector C65-21 (CANL) W C65-11 (CANH) B Power source control ECU (V1 bus)* C65-22 (CANL) W *: w/ Smart Key System
  3. CHECK DLC3 Disconnect the cable from the negative (-) battery terminal before measuring the resistance of the CAN main wire and CAN branch wire. WARNING: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the airbag system. NOTE: When disconnecting the cable, some systems need to be initialized after the cable is reconnected. Refer to «INITIALIZATION [01/2014 - ]»(ref-615109-S31931454042014050900000) . Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition C13-6 (CANH) - C13-14 (CANL) LG - W Ignition switch off 54 to 69 ohms C13-6 (CANH) - C13-4 (CG) LG - W-B Ignition switch off 200 ohms or higher C13-14 (CANL) - C13-4 (CG) W - W-B Ignition switch off 200 ohms or higher C13-6 (CANH) - C13-16 (BAT) LG - G Ignition switch off 6 kohms or higher C13-14 (CANL) - C13-16 (BAT) W - G Ignition switch off 6 kohms or higher
  4. CHECK ECM TEXT IN ILLUSTRATION *A for V1 Bus *B for Power Management Bus *C for Powertrain Bus - - Disconnect the A35 and B30 ECM connectors. Measure the resistance according to the value(s) in the table below. FOR V1 BUS Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition A35-13 (CANH) - A35-5 (CANL) Y - W Ignition switch off 108 to 132 ohms A35-13 (CANH) - B30-104 (E1) Y - BR Ignition switch off 200 ohms or higher A35-5 (CANL) - B30-104 (E1) W - BR Ignition switch off 200 ohms or higher A35-13 (CANH) - A35-20 (BATT) Y - P Ignition switch off 6 kohms or higher A35-5 (CANL) - A35-20 (BATT) W - P Ignition switch off 6 kohms or higher FOR POWER MANAGEMENT BUS Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition A35-12 (CANP) - A35-4 (CANN) W - G Ignition switch off 108 to 132 ohms A35-12 (CANP) - B30-104 (E1) W - BR Ignition switch off 200 ohms or higher A35-4 (CANN) - B30-104 (E1) G - BR Ignition switch off 200 ohms or higher A35-12 (CANP) - A35-20 (BATT) W - P Ignition switch off 6 kohms or higher A35-4 (CANN) - A35-20 (BATT) G - P Ignition switch off 6 kohms or higher FOR POWERTRAIN BUS Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition B30-24 (CAN+) - B30-1 (CAN-) R - G Ignition switch off 108 to 132 ohms B30-24 (CAN+) - B30-104 (E1) R - BR Ignition switch off 200 ohms or higher B30-1 (CAN-) - B30-104 (E1) G - BR Ignition switch off 200 ohms or higher B30-24 (CAN+) - A35-20 (BATT) R - P Ignition switch off 6 kohms or higher B30-1 (CAN-) - A35-20 (BATT) G - P Ignition switch off 6 kohms or higher
  5. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) TEXT IN ILLUSTRATION *1 Main Body ECU (Multiplex Network Body ECU) - - Remove the main body ECU (multiplex network body ECU). Refer to «REMOVAL [01/2014 - ]»(ref-615304-S25576509332014050900000) . Reconnect the 2B and 2D instrument panel junction block assembly connectors. Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition C56-14 (CANH) - C56-13 (CANL) R - W Ignition switch off 54 to 69 ohms C56-14 (CANH) - A-11 (GND1) R - None Ignition switch off 200 ohms or higher C56-13 (CANL) - A-11 (GND1) W - None Ignition switch off 200 ohms or higher C56-14 (CANH) - A-30 (BECU) R - None Ignition switch off 6 kohms or higher C56-13 (CANL) - A-30 (BECU) W - None Ignition switch off 6 kohms or higher
  6. CHECK BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) Disconnect the A36 brake actuator assembly (skid control ECU) connector. Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition A36-25 (CANH) - A36-14 (CANL) R - W Ignition switch off 54 to 69 ohms A36-25 (CANH) - A36-1 (GND1) R - B Ignition switch off 200 ohms or higher A36-14 (CANL) - A36-1 (GND1) W - B Ignition switch off 200 ohms or higher A36-25 (CANH) - A36-12 (+BS) R - W Ignition switch off 6 kohms or higher A36-14 (CANL) - A36-12 (+BS) W - W Ignition switch off 6 kohms or higher
  7. CHECK SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY (STEERING ANGLE SENSOR) Disconnect the C53 spiral with sensor cable sub-assembly (steering angle sensor) connector. Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition C53-4 (CANH) - C53-3 (CANL) BR - W Ignition switch off 54 to 69 ohms C53-4 (CANH) - C53-2 (ESS) BR - W-B Ignition switch off 200 ohms or higher C53-3 (CANL) - C53-2 (ESS) W - W-B Ignition switch off 200 ohms or higher C53-4 (CANH) - C53-6 (BAT) BR - B Ignition switch off 6 kohms or higher C53-3 (CANL) - C53-6 (BAT) W - B Ignition switch off 6 kohms or higher
  8. CHECK AIRBAG SENSOR ASSEMBLY Disconnect the C20 airbag sensor assembly connector. Refer to «REMOVAL [01/2014 - ]»(ref-615288-S13247744362014050900000) . Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition C20-13 (CANH) - C20-22 (CANL) Y - W Ignition switch off 54 to 69 ohms C20-13 (CANH) - C20-25 (E1) Y - W-B Ignition switch off 200 ohms or higher C20-22 (CANL) - C20-25 (E1) W - W-B Ignition switch off 200 ohms or higher C20-13 (CANH) - C13-16 (BAT) Y - G Ignition switch off 6 kohms or higher C20-22 (CANL) - C13-16 (BAT) W - G Ignition switch off 6 kohms or higher
  9. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (w/ Smart Key System) Disconnect the C35 certification ECU (smart key ECU assembly) connector. Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition C35-9 (CANH) - C35-10 (CANL) LG - W Ignition switch off 54 to 69 ohms C35-9 (CANH) - C35-15 (E) LG - BR Ignition switch off 200 ohms or higher C35-10 (CANL) - C35-15 (E) W - BR Ignition switch off 200 ohms or higher C35-9 (CANH) - C35-1 (+B) LG - LG Ignition switch off 6 kohms or higher C35-10 (CANL) - C35-1 (+B) W - LG Ignition switch off 6 kohms or higher
  10. CHECK POWER SOURCE CONTROL ECU (w/ Smart Key System) TEXT IN ILLUSTRATION *A for V1 Bus *B for Power Management Bus Disconnect the C43 power source control ECU connector. Measure the resistance according to the value(s) in the table below. FOR V1 BUS Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition C43-14 (CA1H) - C43-13 (CA1L) B - W Ignition switch off 54 to 69 ohms C43-14 (CA1H) - C43-6 (GND) B - W-B Ignition switch off 200 ohms or higher C43-13 (CA1L) - C43-6 (GND) W - W-B Ignition switch off 200 ohms or higher C43-14 (CA1H) - C43-1 (AM22) B - R Ignition switch off 6 kohms or higher C43-13 (CA1L) - C43-1 (AM22) W - R Ignition switch off 6 kohms or higher FOR POWER MANAGEMENT BUS Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition C43-12 (CA3P) - C43-11 (CA3N) LG - G Ignition switch off 108 to 132 ohms C43-12 (CA3P) - C43-6 (GND) LG - W-B Ignition switch off 200 ohms or higher C43-11 (CA3N) - C43-6 (GND) G - W-B Ignition switch off 200 ohms or higher C43-12 (CA3P) - C43-1 (AM22) LG - R Ignition switch off 6 kohms or higher C43-11 (CA3N) - C43-1 (AM22) G - R Ignition switch off 6 kohms or higher
  11. CHECK COMBINATION METER ASSEMBLY Disconnect the C50 combination meter assembly connector. Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition C50-8 (CANH) - C50-9 (CANL) GR - W Ignition switch off 108 to 132 ohms C50-8 (CANH) - C50-7 (ET) GR - W-B Ignition switch off 200 ohms or higher C50-9 (CANL) - C50-7 (ET) W - W-B Ignition switch off 200 ohms or higher C50-8 (CANH) - C50-5 (B) GR - W Ignition switch off 6 kohms or higher C50-9 (CANL) - C50-5 (B) W - W Ignition switch off 6 kohms or higher
  12. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY Disconnect the C32 air conditioning amplifier assembly connector. Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition C32-8 (CANH) - C32-9 (CANL) V - W Ignition switch off 54 to 69 ohms C32-8 (CANH) - C32-24 (GND) V - W-B Ignition switch off 200 ohms or higher C32-9 (CANL) - C32-24 (GND) W - W-B Ignition switch off 200 ohms or higher C32-8 (CANH) - C13-16 (BAT) V - G Ignition switch off 6 kohms or higher C32-9 (CANL) - C13-16 (BAT) W - G Ignition switch off 6 kohms or higher
  13. CHECK POWER STEERING ECU ASSEMBLY Disconnect the A26 and C48 power steering ECU assembly connectors. Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition C48-1 (CANH) - C48-7 (CANL) L - W Ignition switch off 54 to 69 ohms C48-1 (CANH) - A26-2 (PGND) L - W-B Ignition switch off 200 ohms or higher C48-7 (CANL) - A26-2 (PGND) W - W-B Ignition switch off 200 ohms or higher C48-1 (CANH) - A26-1 (PIG) L - L Ignition switch off 6 kohms or higher C48-7 (CANL) - A26-1 (PIG) W - L Ignition switch off 6 kohms or higher
  14. CHECK TRANSMISSION CONTROL ECU ASSEMBLY (for Automatic Transaxle) Disconnect the B31 transmission control ECU assembly connector. Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition B31-6 (CAN+) - B31-7 (CAN-) R - G Ignition switch off 108 to 132 ohms B31-6 (CAN+) - B31-8 (E1) R - W-B Ignition switch off 200 ohms or higher B31-7 (CAN-) - B31-8 (E1) G - W-B Ignition switch off 200 ohms or higher B31-6 (CAN+) - B31-1 (BATT) R - P Ignition switch off 6 kohms or higher B31-7 (CAN-) - B31-1 (BATT) G - P Ignition switch off 6 kohms or higher

FAIL-SAFE CHART [05/2013 - ]

  1. FAIL-SAFE FUNCTION When communication fails in any of the main wires (communication lines) due to a short circuit or other causes, a fail-safe function, which is specified for each system, operates to prevent the system from malfunctioning. The table below shows the effects on each system when communication is impossible. For further details, refer to each system. Function Behavior during CAN Failure Control Master System Related Control Actuator Vehicle Behavior Indicator and Buzzer Diagnostic Trouble Code Electrical Load Control (Performs idle up according to electrical load, etc.) ECM Air conditioning amplifier assembly, Power steering ECU assembly ECM Idle up according to the electrical load is not performed. The idling speed changes. Nothing Air Conditioning-linked Control (Performs idle up according to the compressor load. Performs air conditioning cut control.) ECM Air conditioning amplifier assembly Air conditioning amplifier assembly Air conditioning-linked control is not performed. Air conditioning does not operate. Nothing Eco Driving Indicator Light (Displays information to the driver to encourage eco-driving.) ECM - Combination meter assembly Eco driving indicator light does not illuminate. Nothing Nothing Integrated Control (Estimates the driver requested torque based on the accelerator pedal operation and performs torque characteristic control according to driving conditions so that drivability, acceleration performance and acceleration feeling are improved.) ECM Brake actuator assembly (skid control ECU), Power steering ECU assembly ECM Does not estimate the driver requested torque based on the accelerator pedal operation and does not perform torque characteristic control according to driving conditions and as a result, drivability, acceleration performance and acceleration feeling are not improved. Does not estimate the driver requested torque based on the accelerator pedal operation and does not perform torque characteristic control according to driving conditions and as a result, drivability, acceleration performance and acceleration feeling are not improved. Nothing ECT System Indicator (Displays shift, switch and mode information to the meter.) ECM - Combination meter assembly Nothing ECT system indicators do not illuminates. Nothing Cruise Control (Adjusts the engine throttle valve opening amount automatically to control the vehicle.) ECM Brake actuator assembly (skid control ECU) ECM, Combination meter assembly When transmission is lost: The cruise main indicator light does not illuminate. When reception is lost: Cruise control is not performed. When transmission is lost: The cruise main indicator light does not illuminate. When reception is lost: Cruise control is not performed. Nothing Anti-lock Brake System Control (Prevents the wheels from locking when stopping suddenly.) Brake actuator assembly (skid control ECU) Airbag sensor assembly - The anti-lock brake system is canceled. When transmission is lost: The anti-lock brake system is canceled. When reception is lost: The ABS warning light illuminates. U0073 U0124 TRC (Prevents unstable driving when accelerating from a stop.) Brake actuator assembly (skid control ECU) ECM, Airbag sensor assembly, Spiral with sensor cable sub-assembly (steering angle sensor) - TRC is canceled. When transmission is lost: TRC is canceled. When reception is lost: The slip indicator light illuminates. U0073 U0100 U0124 U0126 VSC (Reduces drift, etc. when cornering.) Brake actuator assembly (skid control ECU) ECM, Airbag sensor assembly, Spiral with sensor cable sub-assembly (steering angle sensor) - VSC is canceled. When transmission is lost: VSC is canceled. When reception is lost: The slip indicator light illuminates. U0073 U0100 U0124 U0126 Air Conditioning Control Adjusts the air temperature, airflow mode and airflow volume according to the engine coolant temperature. Adjusts the engine coolant temperature compensation map information and switches the value for determining whether the compressor is locked according to the engine type. Air conditioning amplifier assembly ECM - When reception is lost and the bus is continuously detected as being off: Control is performed with the engine coolant temperature set to the default value of 80°C (176°F). The engine type information is maintained (if the engine type information is not known, control is performed using the default value). During a cyclic malfunction: Maintains previous values. Nothing U0100 Air Conditioning Control (Determines if compressor is locked.) Air conditioning amplifier assembly ECM - When reception is lost and the bus is continuously detected as being off: Control is performed with the default value of 0 rpm. During a cyclic malfunction: Maintains previous values. Nothing U0100 Air Conditioning Control (Changes air conditioner control pattern based on destination information.) Air conditioning amplifier assembly Main body ECU (multiplex network body ECU) - When reception is lost and the bus is continuously detected as being off: Maintains previous values (if the previous values are unknown, control is performed using the default values). During a cyclic malfunction: Maintains previous values. Nothing U0142 Air Conditioning Control Performs ambient temperature compensation based on the vehicle speed. Controls the air conditioning based on the ambient temperature. Air conditioning amplifier assembly Combination meter assembly - When reception is lost and the bus is continuously detected as being off: The accuracy of the displayed outside temperature becomes less reliable. During a cyclic malfunction: Maintains previous values. Nothing U0155 Air Conditioning Control (Controls the compressor.) Air conditioning amplifier assembly ECM - When reception is lost and the bus is continuously detected as being off: Control is performed with operation prohibited. During a cyclic malfunction: Maintains previous values. Nothing U0100 Steering Assist Calculation (Changes the assist force according to the vehicle speed.) Power steering ECU assembly Brake actuator assembly (skid control ECU) - When reception is lost: As the vehicle speed cannot be determined, control continues with the vehicle speed set at 100 km/h (62 mph). HINT: The steering wheel feels heavy when the vehicle speed is below 100 km/h (62 mph) and light when the vehicle speed exceeds 100 km/h (62 mph). During a cyclic malfunction: Nothing. When reception is lost: The EPS warning light illuminates. During a cyclic malfunction: Nothing U0129 Assist Start Judgment (Permits assist only when the engine is running.) Power steering ECU assembly ECM, Brake actuator assembly (skid control ECU) - When only the ECM signal is lost: Assist begins when the vehicle speed reaches 0.1 km/h (0.1 mph). When only the skid control ECU signal is lost: When the engine speed signal is 450 rpm or more, assist begins using a fixed value of 100 km/h (62 mph). When the ECM and skid control ECU signal is lost: When reception is lost: Assist begins using a fixed value of 100 km/h (62 mph). During a cyclic malfunction: No assist. When reception is lost: When only the ECM signal is lost: Before assist starts: The EPS indicator light illuminates After assist starts: No indication When only the skid control ECU signal is lost: The EPS warning light illuminates. During a cyclic malfunction: Nothing U0100 U0129 DTC Output (When the TC signal is on, DTC information is sent according to the polling from meter ECU.) Combination meter assembly ECM, Power steering ECU assembly - Not possible to send DTCs to meter ECU. Nothing Nothing Assist Map Selection (Selects the assist map according to the destination information, drive train [2WD or 4WD], engine type, etc.) Power steering ECU assembly ECM, Brake actuator assembly (skid control ECU) - A temporary map is used to perform assist as an assist map cannot be selected according to vehicle specifications. HINT: Steering may feel unusual. Nothing Nothing Idle Up (When a large assist current is created, request idles up to the ECM in order to prevent the battery voltage from dropping.) ECM Power steering ECU assembly - Idle-up control is not possible. Nothing Nothing Warning Light Illumination (When a fail-safe occurs, requests the meter ECU to illuminates the EPS warning light.) Combination meter assembly Power steering ECU assembly - Not possible to send an EPS indicator light illumination request to the meter when an EPS malfunction occurs. Nothing Nothing αB Control (Performs assist to prevent sliding sideways.) Brake actuator assembly (skid control ECU) Brake actuator assembly (skid control ECU) Power steering ECU assembly During αB control, if the data becomes invalid, control stop. During αB control, if the data becomes abnormal during control, control is prohibited. The EPS warning light illuminates. Nothing Steering Assist Calculation (Changes the assist force according to the vehicle speed.) Power steering ECU assembly Brake actuator assembly (skid control ECU), Airbag sensor assembly, Spiral with sensor cable sub-assembly (steering angle sensor) - Does not learn the center position. The EPS warning light illuminates. Nothing Compensation Control (Performs assist according to the vehicle speed for various compensation controls.) Power steering ECU assembly Brake actuator assembly (skid control ECU) - When a CAN malfunction (vehicle speed malfunction) occurs, all controls operate as if the vehicle is being driven at 100 km/h (62 mph). The EPS warning light illuminates. Nothing Stops air conditioning operation in order to decrease battery power consumption when the battery voltage decreases. Power steering ECU assembly - Air conditioning amplifier assembly Load control does not operate. Nothing Nothing TC DTC Output Service (While TC = ON is being received from the engine, a DTC is output in response to the request from the combination meter assembly.) Combination meter assembly ECM Airbag sensor assembly If the TC signal is lost during TC service (TC=ON), the TC is determined to be OFF and TC service ends. Nothing Nothing Event Data Recorder (Records conditions, such as the vehicle speed, the amount the accelerator is depressed, and the shift lever position, when the event data recorder recording conditions are met.) Airbag sensor assembly ECM, Brake actuator assembly (skid control ECU), Airbag sensor assembly, Spiral with sensor cable sub-assembly (steering angle sensor) - When reception is lost: Invalid is recorded in the EDR. During a cyclic malfunction: Maintains previous values. Nothing Nothing Airbag Warning Light Control (Sends airbag warning light illumination information.) Combination meter assembly Airbag sensor assembly - Nothing Nothing Nothing Collision Detection Signal (Reports a collision in order to perform a fuel cut, etc. during a collision.) ECM Airbag sensor assembly - Nothing Nothing Nothing Seat Belt Warning Control (Sends information about the passengers in order to turn the seat belt warning on and off.) Main body ECU (multiplex network body ECU), Combination meter assembly Airbag sensor assembly - Nothing Nothing Nothing Speedometer (Displays the vehicle speed on the speedometer according to the vehicle speed signal.) Combination meter assembly Brake actuator assembly (skid control ECU) Combination meter assembly When reception is lost: The speedometer indicates 0 km/h (0 mph). During a cyclic malfunction: Maintains previous values. Nothing U0129 Tachometer (Displays the engine speed on the tachometer according to the engine speed signal.) Combination meter assembly ECM Combination meter assembly When reception is lost: 0 rpm is indicated on the tachometer. During a cyclic malfunction: Maintains previous values. Nothing U0100 ODO/TRIP Meter (Calculates and indicates the distance driven according to the pulse count of the vehicle speed pulse signal.) Combination meter assembly Brake actuator assembly (skid control ECU) Combination meter assembly When reception is lost: The ODO/TRIP meter stops calculation and displays the last calculated value. During a cyclic malfunction: Maintains previous values. Nothing Nothing Automatic Transmission Shift Indicator (Displays shift information according to the shift position signal.) Combination meter assembly ECM Combination meter assembly When reception is lost: The automatic transmission shift indicator turns off. During a cyclic malfunction: Maintains previous values. Nothing Nothing Telltale (Controls indicator illumination and blinking according to CAN signals.) Combination meter assembly ECM, Brake actuator assembly (skid control ECU), Power steering ECU assembly, Certification ECU (smart key ECU assembly), Airbag sensor assembly, Main body ECU (multiplex network body ECU) Combination meter assembly Nothing The EPS warning light illuminates. All indicators except the EPS warning light maintain the displayed condition. U0131 U0151 Buzzers (Controls buzzer sounding according to CAN signals.) Combination meter assembly ECM, Certification ECU (smart key ECU assembly), Main body ECU (multiplex network body ECU), Power steering ECU assembly Combination meter assembly Nothing The buzzers do not sound. Nothing Fuel Receiver Gauge (Controls the fuel receiver gauge according to the vehicle condition and remaining fuel amount based on the vehicle speed signal.) Combination meter assembly Brake actuator assembly (skid control ECU) Combination meter assembly Control is performed as if the vehicle is stopped. Nothing Nothing Drive Monitor (Performs calculations and displays drive monitor information, such as fuel consumption, according to the fuel injection volume and pulse count of the vehicle pulse signal.) Combination meter assembly ECM, Brake actuator assembly (skid control ECU) Combination meter assembly Drive monitor calculations stop and the display is blank. Nothing Nothing Push Start (Power Source Switching) (Changes the power source mode automatically based on the push start switch signal and commands the starter to operate when certain conditions are met.) Power source control ECU ECM, Combination meter assembly, Main body ECU (multiplex network body ECU) There is no effect on the system because there is input from the direct line. Nothing U0100 Smart/Wireless Control Operates lock/unlock and various warnings when the electrical key transmitter is within the detection area and switches are pressed. Operates the wireless lock/unlock functions, etc. Main body ECU (multiplex network body ECU) Certification ECU (smart key ECU assembly) - Nothing Nothing Nothing Daytime Running Light Control (Turns the headlights off/on after determining whether the vehicle is being driven.) Main body ECU (multiplex network body ECU) ECM - Daytime running light control is not performed. Nothing Nothing Back Door Opener Control (Unlocks the back door latch [illuminates the opener motor] when the switch built into the outside handle is turned on.) Main body ECU (multiplex network body ECU) Certification ECU (smart key ECU assembly), Combination meter assembly - Lost communication with meter ECU: Back door opener control is prohibited. Lost communication with certification ECU: Back door opener control does not operate. Nothing Nothing Illumination Control when Vehicle Approached (illuminates the vehicle interior when the vehicle detects that the user has approached the vehicle.) Main body ECU (multiplex network body ECU) Certification ECU (smart key ECU assembly) - Maintains the illumination state of the dome light. Nothing Nothing Key-linked Door Lock Control (Prevents the door from being locked from outside the vehicle when the driver is inside the vehicle with the ignition switch ON.) Main body ECU (multiplex network body ECU) Airbag sensor assembly - Key-linked door lock control is permitted. Nothing Nothing Entry Function Entry lock/unlock and entry back door unlatch Entry warning Entry illumination (dome light illumination, etc.) Main body ECU (multiplex network body ECU) Main body ECU (multiplex network body ECU), Certification ECU (smart key ECU assembly) Main body ECU (multiplex network body ECU), Combination meter assembly When transmission is lost: Entry lock/unlock and entry back door unlatch. Entry warning does not operate. Entry illumination does not operate. When reception is lost (the data from the main body ECU could not be received): Retries the entry lock operation. Entry warning does not operate. Nothing U0142 Wireless Function (Operates the wireless lock/unlock and panic alarm functions, etc.) Main body ECU (multiplex network body ECU) Main body ECU (multiplex network body ECU), Certification ECU (smart key ECU assembly) Main body ECU (multiplex network body ECU) Wireless lock/unlock and panic alarm functions do not operate. Nothing U0142

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