Note
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.
Before measuring the resistance of the CAN bus, turn the power switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
This section describes the standard values for all CAN related components.
Tech Tips
The systems (ECUs and sensors) that use CAN communication vary depending on the vehicle and optional equipment. Check which systems (ECUs and sensors) are installed to the vehicle.
Operating the power 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.
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.
NO. 1 CAN JUNCTION CONNECTOR (w/o Occupant Classification System)
Check the No. 1 CAN junction connector.
Connection diagram
| *a | Front view of wire harness connector (to No. 1 CAN Junction Connector) |
*b | to Swing Grille Actuator Assembly |
| *c | to Clearance Warning ECU Assembly (w/ Simple Intelligent Parking Assist System) |
*d | to Forward Recognition Camera |
| *e | to Millimeter Wave Radar Sensor Assembly | *f | to Driving Support ECU Assembly |
| *g | to No. 8 CAN Junction Connector | *h | to Central Gateway ECU (Network Gateway ECU) |
Check the connection diagram of the components which are connected to the No. 1 CAN junction connector.
| Terminal No. (Symbol) | Wiring Color | Connected to |
|---|---|---|
| I73-2 (CANH) | B | Swing grille actuator assembly (for Bus 1) |
| I73-12 (CANL) | W | |
| I73-3 (CANH) | LG | Clearance warning ECU assembly* (for Bus 1) |
| I73-13 (CANL) | W | |
| I73-4 (CANH) | R | Forward recognition camera (for Bus 1) |
| I73-14 (CANL) | W | |
| I73-5 (CANH) | BE | Millimeter wave radar sensor assembly (for Bus 1) |
| I73-15 (CANL) | W | |
| I73-6 (CANH) | G | Driving support ECU assembly (for Bus 1) |
| I73-16 (CANL) | W | |
| I73-7 (CANH) | BE | No. 8 CAN junction connector (for Bus 1) |
| I73-17 (CANL) | W | |
| I73-8 (CANH) | SB | Central gateway ECU (network gateway ECU) (for Bus 1) |
| I73-18 (CANL) | W |
*: w/ Simple Intelligent Parking Assist System
NO. 1 CAN JUNCTION CONNECTOR (w/ Occupant Classification System)
Check the No. 1 CAN junction connector.
Connection diagram
| *a | Front view of wire harness connector (to No. 1 CAN Junction Connector) |
*b | to Swing Grille Actuator Assembly |
| *c | to Central Gateway ECU (Network Gateway ECU) | - | - |
Check the connection diagram of the components which are connected to the No. 1 CAN junction connector.
| Terminal No. (Symbol) | Wiring Color | Connected to |
|---|---|---|
| I74-1 (CANH) | B | Swing grille actuator assembly (for Bus 1) |
| I74-12 (CANL) | W | |
| I74-2 (CANH) | BE | Central gateway ECU (network gateway ECU) (for Bus 1) |
| I74-13 (CANL) | W | |
| I74-3 (CANH) | SB | Central gateway ECU (network gateway ECU) (for Bus 1) |
| I74-14 (CANL) | W |
NO. 2 CAN JUNCTION CONNECTOR
Check the No. 2 CAN junction connector.
Connection diagram
| *a | Front view of wire harness connector (to No. 2 CAN Junction Connector) |
*b | to Central Gateway ECU (Network Gateway ECU) |
| *c | to Hybrid Vehicle Control ECU | *d | to Inverter with Converter Assembly |
| *e | to No. 7 CAN Junction Connector | *f | to Brake Booster with Master Cylinder Assembly |
| *g | to No. 5 CAN Junction Connector | *h | to Airbag Sensor Assembly |
| *i | to Steering Sensor | *j | to Power Steering ECU Assembly |
Check the connection diagram of the components which are connected to the No. 2 CAN junction connector.
| Terminal No. (Symbol) | Wiring Color | Connected to |
|---|---|---|
| I75-1 (CANH) | LG | Central gateway ECU (network gateway ECU) (for Bus 2) |
| I75-12 (CANL) | W | |
| I75-2 (CANH) | L | Hybrid vehicle control ECU (for Bus 2) |
| I75-13 (CANL) | W | |
| I75-3 (CANH) | GR | Inverter with converter assembly (for Bus 2) |
| I75-14 (CANL) | W | |
| I75-4 (CANH) | B | No. 7 CAN junction connector (for Bus 2) |
| I75-15 (CANL) | W | |
| I75-5 (CANH) | P | Brake booster with master cylinder assembly (for Bus 2) |
| I75-16 (CANL) | W | |
| I75-7 (CANH) | G | No. 5 CAN junction connector (for Bus 4) |
| I75-18 (CANL) | W | |
| I75-8 (CANH) | R | Airbag sensor assembly (for Bus 4) |
| I75-19 (CANL) | W | |
| I75-9 (CANH) | SB | Brake booster with master cylinder assembly (for Bus 4) |
| I75-20 (CANL) | W | |
| I75-10 (CANH) | BE | Steering sensor (for Bus 4) |
| I75-21 (CANL) | W | |
| I75-11 (CANH) | V | Power steering ECU assembly (for Bus 4) |
| I75-22 (CANL) | W |
NO. 3 CAN JUNCTION CONNECTOR
Check the No. 3 CAN junction connector.
Connection diagram
| *a | Front view of wire harness connector (to No. 3 CAN Junction Connector) |
*b | to Meter Circuit Plate |
| *c | to Main Body ECU (Multiplex Network Body ECU) | *d | to No. 1 Headlight ECU Sub-assembly LH |
| *e | to Air Conditioning Amplifier Assembly | *f | to Certification ECU (Smart Key ECU Assembly) |
| *g | to Central Gateway ECU (Network Gateway ECU) | *h | to Combination Meter Mirror ECU (w/ Headup Display System) |
Check the connection diagram of the components which are connected to the No. 3 CAN junction connector.
| Terminal No. (Symbol) | Wiring Color | Connected to |
|---|---|---|
| I76-1 (CANH) | V | Meter circuit plate (for Bus 5) |
| I76-12 (CANL) | W | |
| I76-2 (CANH) | SB | Main body ECU (multiplex network body ECU) (for Bus 5) |
| I76-13 (CANL) | W | |
| I76-3 (CANH) | L | No. 1 headlight ECU sub-assembly LH (for Bus 5) |
| I76-14 (CANL) | W | |
| I76-4 (CANH) | BE | Air conditioning amplifier assembly (for Bus 5) |
| I76-15 (CANL) | W | |
| I76-5 (CANH) | R | Certification ECU (smart key ECU assembly) (for Bus 5) |
| I76-16 (CANL) | W | |
| I76-6 (CANH) | B | Central gateway ECU (network gateway ECU) (for Bus 5) |
| I76-17 (CANL) | W | |
| I76-7 (CANH) | P | Combination meter mirror ECU* (for Bus 5) |
| I76-18 (CANL) | W |
*: w/ Headup Display System
NO. 4 CAN JUNCTION CONNECTOR
Check the No. 4 CAN junction connector.
Connection diagram
| *a | Front view of wire harness connector (to No. 4 CAN Junction Connector) |
*b |
|
| *c | to Central Gateway ECU (Network Gateway ECU) | - | - |
Check the connection diagram of the components which are connected to the No. 4 CAN junction connector.
| Terminal No. (Symbol) | Wiring Color | Connected to |
|---|---|---|
| I77-1 (CANH) | L |
(for Bus 3) |
| I77-12 (CANL) | W | |
| I77-3 (CANH) | G | Central gateway ECU (network gateway ECU) (for Bus 3) |
| I77-14 (CANL) | W | |
| I77-4 (CANH) | V | Central gateway ECU (network gateway ECU) (for Bus 3) |
| I77-15 (CANL) | W |
*1: for Navigation Receiver Type
*2: for Radio and Display Type
NO. 5 CAN JUNCTION CONNECTOR
Check the No. 5 CAN junction connector.
Connection diagram
| *a | Front view of wire harness connector (to No. 5 CAN Junction Connector) |
*b | to No. 2 CAN Junction Connector |
| *c | to Central Gateway ECU (Network Gateway ECU) | *d | to ECM |
| *e | to Hybrid Vehicle Control ECU | *f | to Occupant Detection ECU (w/ Occupant Classification System) |
Check the connection diagram of the components which are connected to the No. 5 CAN junction connector.
| Terminal No. (Symbol) | Wiring Color | Connected to |
|---|---|---|
| I78-1 (CANH) | G | No. 2 CAN junction connector (for Bus 4) |
| I78-12 (CANL) | W | |
| I78-2 (CANH) | LG | Central gateway ECU (network gateway ECU) (for Bus 4) |
| I78-13 (CANL) | W | |
| I78-3 (CANH) | SB | ECM (for Bus 4) |
| I78-14 (CANL) | W | |
| I78-4 (CANH) | G | Hybrid vehicle control ECU (for Bus 4) |
| I78-15 (CANL) | W | |
| I78-5 (CANH) | L | Occupant detection ECU* (for Bus 4) |
| I78-16 (CANL) | W |
*: w/ Occupant Classification System
NO. 7 CAN JUNCTION CONNECTOR
Check the No. 7 CAN junction connector.
Connection diagram
| *a | Front view of wire harness connector (to No. 7 CAN Junction Connector) |
*b | to ECM |
| *c | to Battery ECU Assembly | *d | to Electric Vehicle Charger Assembly |
| *e | to Solar Energy Control Unit (w/ Solar Charging System) |
*f | to No. 2 CAN Junction Connector |
Check the connection diagram of the components which are connected to the No. 7 CAN junction connector.
| Terminal No. (Symbol) | Wiring Color | Connected to |
|---|---|---|
| N94-1 (CANH) | R | ECM (for Bus 2) |
| N94-12 (CANL) | W | |
| N94-3 (CANH) | GR | Battery ECU assembly (for Bus 2) |
| N94-14 (CANL) | W | |
| N94-4 (CANH) | L | Electric vehicle charger assembly (for Bus 2) |
| N94-15 (CANL) | W | |
| N94-5 (CANH) | V | Solar energy control unit* (for Bus 2) |
| N94-16 (CANL) | W | |
| N94-6 (CANH) | B | No. 2 CAN junction connector (for Bus 2) |
| N94-17 (CANL) | W |
*: w/ Solar Charging System
NO. 8 CAN JUNCTION CONNECTOR (w/o Occupant Classification System)
Check the No. 8 CAN junction connector.
Connection diagram
| *a | Front view of wire harness connector (to No. 8 CAN Junction Connector) |
*b | to Central Gateway ECU (Network Gateway ECU) |
| *c | to Blind Spot Monitor Sensor LH (w/ Blind Spot Monitor System) |
*d | to Rear Television Camera Assembly |
| *e | to No. 1 CAN Junction Connector | - | - |
Check the connection diagram of the components which are connected to the No. 8 CAN junction connector.
| Terminal No. (Symbol) | Wiring Color | Connected to |
|---|---|---|
| N95-4 (CANH) | P | Central gateway ECU (network gateway ECU) (for Bus 1) |
| N95-14 (CANL) | W | |
| N95-5 (CANH) | B | Blind spot monitor sensor LH* (for Bus 1) |
| N95-15 (CANL) | W | |
| N95-6 (CANH) | LG | Rear television camera assembly (for Bus 1) |
| N95-16 (CANL) | W | |
| N95-7 (CANH) | BE | No. 1 CAN junction connector (for Bus 1) |
| N95-17 (CANL) | W |
*: w/ Blind Spot Monitor System
DLC3
Disconnect the cable from the negative (-) auxiliary battery terminal.
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)
| *a | Component without harness connected (Central Gateway ECU (Network Gateway ECU)) |
- | - |
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the I62 central gateway ECU (network gateway ECU) connector.
Measure the resistance according to the value(s) in the table below.
| *a | Front view of wire harness connector (to Central Gateway ECU (Network Gateway ECU)) |
- | - |
STEERING SENSOR
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the I58 steering sensor connector.
| *a | Front view of wire harness connector (to Steering Sensor) |
Measure the resistance according to the value(s) in the table below.
HYBRID VEHICLE CONTROL ECU
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the I2 and I3 hybrid vehicle control ECU connectors.
Measure the resistance according to the value(s) in the table below.
| *a | Front view of wire harness connector (to Hybrid Vehicle Control ECU) |
- | - |
INVERTER WITH CONVERTER ASSEMBLY
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the C33 inverter with converter assembly connector.
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector (to Inverter with Converter Assembly) |
- | - |
BATTERY ECU ASSEMBLY
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the t14 battery ECU assembly connector.
| *a | Front view of wire harness connector (to Battery ECU Assembly) |
Measure the resistance according to the value(s) in the table below.
ELECTRIC VEHICLE CHARGER ASSEMBLY
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the N74 electric vehicle charger assembly connector.
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector (to Electric Vehicle Charger Assembly) |
- | - |
SOLAR ENERGY CONTROL UNIT (w/ Solar Charging System)
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the N71 and N73 solar energy control unit connectors.
| *a | Front view of wire harness connector (to Solar Energy Control Unit) |
Measure the resistance according to the value(s) in the table below.
ECM
Refer to Terminals of ECU.
w/ Canister Pump Module
w/o Canister Pump Module
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the A31 and C31 ECM connectors.
Measure the resistance according to the value(s) in the table below.
| *a | Front view of wire harness connector (to ECM) |
- | - |
METER CIRCUIT PLATE
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the I6 meter circuit plate connector.
| *a | Front view of wire harness connector (to Meter Circuit Plate) |
Measure the resistance according to the value(s) in the table below.
*1: for LHD
*2: for RHD
COMBINATION METER MIRROR ECU (w/ Headup Display System)
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the G8 combination meter mirror ECU connector.
| *a | Front view of wire harness connector (to Combination Meter Mirror ECU) |
Measure the resistance according to the value(s) in the table below.
BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the A32 brake booster with master cylinder assembly connector.
| *a | Front view of wire harness connector (to Brake Booster with Master Cylinder Assembly) |
Measure the resistance according to the value(s) in the table below.
MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the I18 main body ECU (multiplex network body ECU) connector.
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector (to Main Body ECU (Multiplex Network Body ECU)) |
- | - |
CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the I1 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.
POWER STEERING ECU ASSEMBLY
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the I21 and I57 power steering ECU assembly connectors.
Measure the resistance according to the value(s) in the table below.
| *a | Front view of wire harness connector (to Power Steering ECU Assembly) |
- | - |
CLEARANCE WARNING ECU ASSEMBLY (w/ Simple Intelligent Parking Assist System)
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the I28 clearance warning ECU assembly connector.
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector (to Clearance Warning ECU Assembly) |
- | - |
AIRBAG SENSOR ASSEMBLY
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the I59 airbag sensor assembly connector.
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector (to Airbag Sensor Assembly) |
- | - |
AIR CONDITIONING AMPLIFIER ASSEMBLY
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the I61 air conditioning amplifier assembly connector.
| *a | Front view of wire harness connector (to Air Conditioning Amplifier Assembly) |
Measure the resistance according to the value(s) in the table below.
NAVIGATION RECEIVER ASSEMBLY (for Navigation Receiver Type)
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the I33 and I34 navigation receiver assembly connectors.
Measure the resistance according to the value(s) in the table below.
| *a | Front view of wire harness connector (to Navigation Receiver Assembly) |
- | - |
RADIO AND DISPLAY RECEIVER ASSEMBLY (for Radio and Display Type)
Refer to Terminals of ECU.
for Audio and Visual System
for Navigation System
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the I96 and I97 radio and display receiver assembly connectors.
Measure the resistance according to the value(s) in the table below.
| *a | Front view of wire harness connector (to Radio and Display Receiver Assembly) |
- | - |
SWING GRILLE ACTUATOR ASSEMBLY (w/ Occupant Classification System)
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the A28 swing grille actuator assembly connector.
| *a | Front view of wire harness connector (to Swing Grille Actuator Assembly) |
Measure the resistance according to the value(s) in the table below.
SWING GRILLE ACTUATOR ASSEMBLY (w/o Occupant Classification System)
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the A29 swing grille actuator assembly connector.
| *a | Front view of wire harness connector (to Swing Grille Actuator Assembly) |
Measure the resistance according to the value(s) in the table below.
BLIND SPOT MONITOR SENSOR LH (w/ Blind Spot Monitor System)
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the N50 blind spot monitor sensor LH connector.
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector (to Blind Spot Monitor Sensor LH) |
- | - |
DRIVING SUPPORT ECU ASSEMBLY (w/ Toyota Safety Sense)
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the I41 driving support ECU assembly connector.
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector (to Driving Support ECU Assembly) |
- | - |
FORWARD RECOGNITION CAMERA (w/ Toyota Safety Sense)
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the O6 forward recognition camera connector.
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector (to Forward Recognition Camera) |
- | - |
MILLIMETER WAVE RADAR SENSOR ASSEMBLY (w/ Toyota Safety Sense)
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the A2 millimeter wave radar sensor assembly connector.
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector (to Millimeter Wave Radar Sensor Assembly) |
- | - |
OCCUPANT DETECTION ECU (w/ Occupant Classification System)
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the a5 occupant detection ECU connector.
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector (to Occupant Detection ECU) |
- | - |
NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the A15 No. 1 headlight ECU sub-assembly LH connector.
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector (to No. 1 Headlight ECU Sub-assembly LH) |
- | - |
REAR TELEVISION CAMERA ASSEMBLY (w/ Parking Assist Monitor System)
Refer to Terminals of ECU.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the R4 rear television camera assembly connector.
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector (to Rear Television Camera Assembly) |
- | - |