DESCRIPTION
There may be a short circuit between the CAN bus lines and GND when the resistance between terminals 6 (CANH) and 4 (CG) or terminals 14 (CANL) and 4 (CG) of the DLC3 is below 200 Ω.
| Symptom | Trouble Area |
|---|---|
| The resistance between terminals 6 (CANH) and 4 (CG) or terminals 14 (CANL) and 4 (CG) of the DLC3 is below 200 Ω. |
|
*1: w/o Vehicle Stability Control System
*2: w/ Vehicle Stability Control System (for Hydraulic Brake Booster)
*3: w/ Audio and Visual System (for Radio and Display Type)
*4: for 1KD-FTV
*5: w/ TOYOTA Parking Assist-sensor System (for 4 Sensor Type)
*6: for 5L-E
WIRING DIAGRAM
INSPECTION PROCEDURE
Tech Tips
Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
PROCEDURE
DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and the CAN branch wire.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the airbag system.
Note
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work Click here.
When disconnecting the cable, some systems need to be initialized after the cable is reconnected Click here.
| NEXT |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (DLC3 CAN BRANCH WIRE)
| *a | Front view of DLC3 |
Disconnect the G132 No. 2 junction connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DLC3 (CANH, CANL) |
| OK |
|
CONNECT CONNECTOR
Reconnect the G132 No. 2 junction connector.
| NEXT |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR SIDE)
| *a | Front view of DLC3 |
Disconnect the G134 No. 3 junction connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CONNECT CONNECTOR Click here |
| OK |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - POWER STEERING ECU ASSEMBLY)
Note
For vehicles with a 5L-E engine, go to "Check for Short to GND in CAN Bus Wire (No. 3 Junction Connector - Air Conditioning Amplifier Assembly)".
| *a | Rear view of wire harness connector (to No. 3 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CONNECT CONNECTOR Click here |
| OK |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)
| *a | Rear view of wire harness connector (to No. 3 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CONNECT CONNECTOR Click here |
| OK |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - FOUR WHEEL DRIVE CONTROL ECU)
| *a | Rear view of wire harness connector (to No. 3 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CONNECT CONNECTOR Click here |
| OK |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - YAW RATE SENSOR ASSEMBLY)
| *a | Rear view of wire harness connector (to No. 3 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CONNECT CONNECTOR Click here |
| OK |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - NETWORK GATEWAY ECU)
Note
For vehicles without a TOYOTA parking assist-sensor system (for 4 sensor type), go to "Check for Short to GND in CAN Bus Wire (No. 3 Junction Connector - ECM or No. 4 Junction Connector)".
| *a | Rear view of wire harness connector (to No. 3 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CONNECT CONNECTOR Click here |
| OK |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - ECM OR NO. 4 JUNCTION CONNECTOR)
| *a | Rear view of wire harness connector (to No. 3 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| Result | Proceed to |
|---|---|
| OK | A |
| NG (for 1KD-FTV) | B |
| NG (for 5L-E) | C |
| B |
|
CONNECT CONNECTOR Click here |
| C |
|
CONNECT CONNECTOR Click here |
| A |
|
REPLACE NO. 3 JUNCTION CONNECTOR
CONNECT CONNECTOR
Reconnect the G134 No. 3 junction connector.
| NEXT |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (POWER STEERING ECU ASSEMBLY)
| *a | Rear view of wire harness connector (to Power Steering ECU Assembly) |
| *b | Front view of DLC3 |
Disconnect the G46 power steering ECU assembly connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO POWER STEERING ECU ASSEMBLY (CANH, CANL) |
| OK |
|
REPLACE POWER STEERING ECU ASSEMBLY Click here
CONNECT CONNECTOR
Reconnect the G134 No. 3 junction connector.
| NEXT |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (AIR CONDITIONING AMPLIFIER ASSEMBLY)
| *a | Front view of wire harness connector (to Air Conditioning Amplifier Assembly) |
| *b | Front view of DLC3 |
Disconnect the G25 air conditioning amplifier assembly connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO AIR CONDITIONING AMPLIFIER ASSEMBLY (CANH, CANL) |
| OK |
|
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here
CONNECT CONNECTOR
Reconnect the G134 No. 3 junction connector.
| NEXT |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (FOUR WHEEL DRIVE CONTROL ECU)
| *a | Rear view of wire harness connector (to Four Wheel Drive Control ECU) |
| *b | Front view of DLC3 |
Disconnect the G53 four wheel drive control ECU connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO FOUR WHEEL DRIVE CONTROL ECU (CANH, CANL) |
| OK |
|
REPLACE FOUR WHEEL DRIVE CONTROL ECU Click here
CONNECT CONNECTOR
Reconnect the G134 No. 3 junction connector.
| NEXT |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (YAW RATE SENSOR ASSEMBLY)
| *a | Front view of wire harness connector (to Yaw Rate Sensor Assembly) |
| *b | Front view of DLC3 |
Disconnect the G52 yaw rate sensor assembly connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO YAW RATE SENSOR ASSEMBLY (CANH, CANL) |
| OK |
|
REPLACE YAW RATE SENSOR ASSEMBLY Click here
CONNECT CONNECTOR
Reconnect the G134 No. 3 junction connector.
| NEXT |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NETWORK GATEWAY ECU)
| *a | Rear view of wire harness connector (to Network Gateway ECU) |
| *b | Front view of DLC3 |
Disconnect the G155 network gateway ECU connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO NETWORK GATEWAY ECU (CA1H, CA1L) |
| OK |
|
REPLACE NETWORK GATEWAY ECU Click here
CONNECT CONNECTOR
Reconnect the G134 No. 3 junction connector.
| NEXT |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (ECM)
| *a | Rear view of wire harness connector (to ECM) |
| *b | Front view of DLC3 |
Disconnect the G58 ECM connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (CANH, CANL) |
| OK |
|
REPLACE ECM Click here
CONNECT CONNECTOR
Reconnect the G134 No. 3 junction connector.
| NEXT |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 4 JUNCTION CONNECTOR)
| *a | Rear view of wire harness connector (to No. 4 Junction Connector) |
| *b | Front view of DLC3 |
Disconnect the G101 No. 4 junction connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 4 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR) |
| OK |
|
REPLACE NO. 4 JUNCTION CONNECTOR
CONNECT CONNECTOR
Reconnect the G134 No. 3 junction connector.
| NEXT |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)
| *a | Rear view of wire harness connector (to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
Disconnect the G132 No. 2 junction connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 2 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR) |
| OK |
|
CONNECT CONNECTOR
Reconnect the G132 No. 2 junction connector.
| NEXT |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR SIDE)
| *a | Front view of DLC3 |
Disconnect the A72 No. 1 junction connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CONNECT CONNECTOR Click here |
| OK |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - SKID CONTROL ECU)
| *a | Rear view of wire harness connector (to No. 1 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| Result | Proceed to |
|---|---|
| OK | A |
| NG (w/o Vehicle Stability Control System) | B |
| NG (w/ Vehicle Stability Control System [for Hydraulic Brake Booster]) | C |
| B |
|
CONNECT CONNECTOR Click here |
| C |
|
CONNECT CONNECTOR Click here |
| A |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)
| *a | Rear view of wire harness connector (to No. 1 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CONNECT CONNECTOR Click here |
| OK |
|
REPLACE NO. 1 JUNCTION CONNECTOR
CONNECT CONNECTOR
Reconnect the A72 No. 1 junction connector.
| NEXT |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (SKID CONTROL ECU)
| *a | Front view of wire harness connector (to Brake Actuator Assembly [Skid Control ECU]) |
| *b | Front view of DLC3 |
Disconnect the A6 brake actuator assembly (skid control ECU) connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO SKID CONTROL ECU (CANH, CANL) |
| OK |
|
REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) Click here
CONNECT CONNECTOR
Reconnect the A72 No. 1 junction connector.
| NEXT |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (SKID CONTROL ECU)
| *a | Front view of wire harness connector (to Master Cylinder Solenoid [Skid Control ECU]) |
| *b | Front view of DLC3 |
Disconnect the A7 master cylinder solenoid (skid control ECU) connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO SKID CONTROL ECU (CANH, CANL) |
| OK |
|
REPLACE MASTER CYLINDER SOLENOID (SKID CONTROL ECU) Click here
CONNECT CONNECTOR
Reconnect the A72 No. 1 junction connector.
| NEXT |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (COMBINATION METER ASSEMBLY)
| *a | Rear view of wire harness connector (to Combination Meter Assembly) |
| *b | Front view of DLC3 |
Disconnect the G6 combination meter assembly connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO COMBINATION METER ASSEMBLY (CANH, CANL) |
| OK |
|
REPLACE COMBINATION METER ASSEMBLY Click here
CONNECT CONNECTOR
Reconnect the A72 No. 1 junction connector.
| NEXT |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)
| *a | Rear view of wire harness connector (to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
Disconnect the G132 No. 2 junction connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR) |
| OK |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - RADIO AND DISPLAY RECEIVER ASSEMBLY)
Note
For vehicles without an audio and visual system (for radio and display type), go to "Check for Short to GND in CAN Bus Wire (No. 2 Junction Connector - Center Airbag Sensor Assembly)".
| *a | Rear view of wire harness connector (to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CONNECT CONNECTOR Click here |
| OK |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR ASSEMBLY)
| *a | Rear view of wire harness connector (to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CONNECT CONNECTOR Click here |
| OK |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - STEERING ANGLE SENSOR)
Note
For vehicles without a vehicle stability control system (for hydraulic brake booster), go to "Check for Short to GND in CAN Bus Wire (No. 2 Junction Connector - Main Body ECU)".
| *a | Rear view of wire harness connector (to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CONNECT CONNECTOR Click here |
| OK |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - MAIN BODY ECU)
| *a | Rear view of wire harness connector (to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CONNECT CONNECTOR Click here |
| OK |
|
REPLACE NO. 2 JUNCTION CONNECTOR
CONNECT CONNECTOR
Reconnect the G132 No. 2 junction connector.
| NEXT |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (RADIO AND DISPLAY RECEIVER ASSEMBLY)
| *a | Front view of wire harness connector (to Radio and Display Receiver Assembly) |
| *b | Front view of DLC3 |
Disconnect the H51 radio and display receiver assembly connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO RADIO AND DISPLAY RECEIVER ASSEMBLY (CANH, CANL) |
| OK |
|
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here
CONNECT CONNECTOR
Reconnect the G132 No. 2 junction connector.
| NEXT |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CENTER AIRBAG SENSOR ASSEMBLY)
| *a | Front view of wire harness connector (to Center Airbag Sensor Assembly) |
| *b | Front view of DLC3 |
Disconnect the G1 center airbag sensor assembly connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO CENTER AIRBAG SENSOR ASSEMBLY (CANH, CANL) |
| OK |
|
REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here
CONNECT CONNECTOR
Reconnect the G132 No. 2 junction connector.
| NEXT |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (STEERING ANGLE SENSOR)
| *a | Rear view of wire harness connector (to Spiral Cable Sub-assembly [Steering Angle Sensor]) |
| *b | Front view of DLC3 |
Disconnect the G33 spiral cable sub-assembly (steering angle sensor) connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO STEERING ANGLE SENSOR (CANH, CANL) |
| OK |
|
REPLACE SPIRAL CABLE SUB-ASSEMBLY (STEERING ANGLE SENSOR) Click here
CONNECT CONNECTOR
Reconnect the G132 No. 2 junction connector.
| NEXT |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (MAIN BODY ECU)
| *a | Rear view of wire harness connector (to Main Body ECU [Multiplex Network Body ECU]) |
| *b | Front view of DLC3 |
Disconnect the G64 main body ECU (multiplex network body ECU) connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO MAIN BODY ECU (CANH, CANL) |
| OK |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here