CAN Communication: Overview Lexus RX II рестайлинг

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1. STEERING SYSTEM HANDLING PRECAUTIONS Care must be taken when replacing parts. Incorrect replacement could affect the performance of the steering system and result in hazardous driving.
2. SRS AIRBAG SYSTEM HANDLING PRECAUTIONS This vehicle is equipped with an SRS (Supplemental Restraint System) such as the driver airbag and front passenger 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 removal or installation of parts, inspection or replacement), be sure to read the precautionary notice for the Supplemental Restraint System (See «AIRBAG SYSTEM»(/lexus/rx/ii-2006-2009/remont/airbag/#supplemental-restraint-system) ).
3. CONNECTOR HANDLING When inserting tester probes into a connector, insert them from the rear of the connector. Use a service wire to check the connector if it is impossible to check continuity from the rear of the connector.

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HINT

1. The skid control ECU detects and stores steering sensor and yaw rate sensor DTCs and performs DTC communication by receiving information from the steering sensor and yaw rate sensor.
2. The HV control ECU detects and stores distance control ECU DTCs, and performs DTC communication by receiving information from the distance control ECU.
3. The HV control ECU uses the CAN communication system to perform DTC communication instead of the conventional communication line (SIL).

SYSTEM DESCRIPTION

1. BRIEF DESCRIPTION The CAN (Controller Area Network) is a serial data communication system for real time application. It is a vehicle multiplex communication system which has a high communication speed (500 kbps) and the ability to detect malfunctions. By pairing the CANH and CANL bus lines, the CAN performs communication based on differential voltage. Many ECUs (sensors) installed on the vehicle operate by sharing information and communicating with each other. The CAN has two resistors of 120 ohms which are necessary to communicate with the main bus line.
2. DEFINITION OF TERMS Main bus line The main bus line is a wire harness between the two terminus circuits on the bus (communication line). This is the main bus in the CAN communication system. Sub bus line The sub bus line is a wire harness which diverges from the main bus line to an ECU or sensor. Terminus circuit The terminus circuit is a circuit that converts communication current of the CAN communication into bus voltage. It consists of a resistor and condenser. Two terminus circuits are necessary on a bus.
3. ECUS OR SENSORS WHICH COMMUNICATE THROUGH CAN COMMUNICATION SYSTEM Skid control ECU Yaw rate sensor Steering sensor Distance control ECU Gateway ECU Power steering ECU Hybrid vehicle control ECU
4. DIAGNOSTIC CODE FOR CAN COMMUNICATION SYSTEM If Cs for the CAN communication system are as follows: U0001, U0073, U0100-211, U0100-212, U0100-530, U0100-774, U0100-784, U0105, U0122-732, U0123-736, U0126-735, U0293-730, U0293, U1101-728, U0129-220, U0129-222, U0129-528, U0129-529, U0131-433, U0131-434, U0146-435, P0A1D-615, U0121, U0123, U0124, U0126, U0146, U0293, P3108-594, 5C-42
5. REMARK FOR TROUBLESHOOTING Trouble in the CAN bus (communication line) can be checked from the DLC3 (except when there is a wire break in other than the sub bus line of the DLC3). NOTE: Do not connect the tester directly to the DLC3. Be sure to use a service wire. DTCs for the CAN communication system can be checked using the intelligent tester via the CAN VIM. ECUs cannot output DTCs if there is trouble in the sub bus line of the DLC3 even though the DLC3 is also connected to the CAN communication system.
6. HOW TO DISTINGUISH THE CAN J/C CONNECTOR In the CAN communication system, the shape of all connectors connected to the CAN J/C is the same. The connectors connected to the CAN J/C can be distinguished by the colors of the bus lines and the connecting side of the connector. HINT: See «TERMINALS OF ECU» for bus line color or the type of connecting surface.

DESCRIPTION

DETECTION ITEM CONDITION CHART

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1. CHECK WIRE HARNESS (+B1, +B2, IGSW, MREL, E1) Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value H31-5 (E1) - Body ground Always Below 1 ohms Measure the voltage according to the value (s) in the table below. Standard voltage TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value H29-9 (IGSW) - Body ground Ignition switch on 10 to 12 V H34-1 (+B2) - Body ground Ignition switch on 10 to 12 V H34-2 (+B1) - Body ground Ignition switch on 10 to 12 V H34-12 (MREL) - Body ground Ignition switch on 10 to 12 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE HYBRID VEHICLE CONTROL ECU

DETECTION ITEM CONDITION CHART

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1. CHECK CAN BUS LINE FOR DISCONNECTION (SKID CONTROL ECU SUB BUS LINE) Turn the ignition switch off. Disconnect the skid control ECU connector (S39). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value S39-19 (CANH) - S39-18 (CANL) Disconnect the negative battery cable 54 to 69 ohms NG: REPAIR OR REPLACE SKID CONTROL ECU BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L) OK: Go to next step
2. CHECK WIRE HARNESS (IG1, IG2, GND1, GND2, GND3, GND4, GND5, GND6) Disconnect the skid control ECU connector (S38), (S40), and (S41). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value S38-1 (GND1) - Body ground Always Below 1 ohms S39-2 (GND2) - Body ground Always Below 1 ohms S39-1 (GND3) - Body ground Always Below 1 ohms S40-2 (GND4) - Body ground Always Below 1 ohms S40-1 (GND5) - Body ground Always Below 1 ohms S41-4 (GND6) - Body ground Always Below 1 ohms HINT: Measure the resistance with the skid control ECU connector (S39) disconnected. Measure the voltage according to the value (s) in the table below. Standard voltage TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value S39-7 (IG1) - Body ground Ignition switch on 10 to 14 V S41-5 (IG2) - Body ground Ignition switch on 10 to 14 V HINT: Measure the voltage with the skid control ECU connector (S39) disconnected. NG: REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR OK: REPLACE SKID CONTROL ECU

DETECTION ITEM CONDITION CHART

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1. CHECK CAN BUS LINE FOR DISCONNECTION (DISTANCE CONTROL ECU SUB BUS LINE) Turn the ignition switch off. Disconnect the distance control ECU connector (D2). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D2-8 (CANH) - D2-9 (CANL) Disconnect the negative battery cable 54 to 69 ohms NG: REPAIR OR REPLACE DISTANCE CONTROL ECU BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L) OK: Go to next step
2. CHECK WIRE HARNESS (B, GND, SGND) Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D2-12 (SGND) - Body ground Always Below 1 ohms D2-10 (GND) - Body ground Always Below 1 ohms Measure the voltage according to the value (s) in the table below. Standard voltage TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D2-1 (B) - Body ground Ignition switch on 10 to 14 V OK: REPLACE DISTANCE CONTROL ECU NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

DETECTION ITEM CONDITION CHART

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1. CHECK CAN BUS LINE FOR DISCONNECTION (POWER STEERING ECU SUB BUS LINE) Turn the ignition switch off. Disconnect the power steering ECU connector (P41). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value P41-2 (CANH) - P41-3 (CANL) Disconnect the negative battery cable 54 to 69 ohms NG: REPAIR OR REPLACE POWER STEERING ECU BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L) OK: Go to next step
2. CHECK WIRE HARNESS (IG, PGND) Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value P41-5 (PGND) - Body ground Always Below 1 ohms Measure the voltage according to the value (s) in the table below. Standard voltage TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value P41-9 (IG) - Body ground Ignition switch on 10 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE POWER STEERING ECU

DETECTION ITEM CONDITION CHART

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1. CHECK CAN BUS LINE FOR DISCONNECTION (GATEWAY ECU SUB BUS LINE) Turn the ignition switch off. Disconnect the gateway ECU connector (G3). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value G3-17 (CA1H) - G3-18 (CA1L) Disconnect the negative battery cable 54 to 69 ohms NG: REPAIR OR REPLACE GATEWAY ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) OK: Go to next step
2. CHECK WIRE HARNESS (BATT, ACC, IG, GND) Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value G3-24 (GND) - Body ground Always Below 1 ohms Measure the voltage according to the value (s) in the table below. Standard voltage TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value G3-2 (ACC) - Body ground Ignition switch ACC 10 to 14 V G3-1 (IG) - Body ground Ignition switch on 10 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE GATEWAY ECU

TESTER CONNECTION SPECIFIED CONDITION

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DETECTION ITEM CONDITION CHART

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1. CHECK CAN BUS LINE FOR DISCONNECTION (YAW RATE SENSOR SUB BUS LINE) Turn the ignition switch off. Disconnect the yaw rate sensor connector (Y1). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value Y1-3 (CANH) - Y1-2 (CANL) Disconnect the negative battery cable 54 to 69 ohms NG: REPAIR OR REPLACE YAW RATE SENSOR SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) OK: Go to next step
2. CHECK WIRE HARNESS (IG, GND) Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value Y1-1 (GND) - Body ground Always Below 1 ohms Measure the voltage according to the value (s) in the table below. Standard voltage TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value Y1-5 (IG) - Body ground Ignition switch on 10 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE YAW RATE SENSOR

When any DTC for the CAN communication system is output, first measure the resistance between the terminals of the DLC3 to specify the trouble area. Then check that there is no short in the CAN main bus line, between the CAN bus lines, to +B, or to GND.

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1. CHECK CAN BUS WIRE (MAIN BUS LINE FOR DISCONNECTION, BUS LINES FOR SHORT CIRCUIT) Turn the ignition switch off. Measure the resistance according to the value (s) in the table below. Result TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value Proceed To D1-6 (CANH) - D1-14 (CANL) Disconnect the negative battery cable 54 to 69 ohms OK D1-6 (CANH) - D1 -14 (CANL) Disconnect the negative battery cable 69 ohms or higher NG-A D1-6 (CANH) -D1-14 (CANL) Disconnect the negative battery cable 54 ohms or less NG-B NG-A: CHECK CAN BUS MAIN WIRE (FOR DISCONNECTION) NG-B: CHECK CAN BUS WIRE (FOR SHORT CIRCUIT) OK: Go to next step
2. CHECK CAN BUS WIRE (FOR SHORT TO +B) Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher D1-14 (CANL) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher NG: CHECK CAN BUS WIRE (FOR SHORT TO +B) OK: Go to next step
3. CHECK CAN BUS WIRE (FOR SHORT TO GND) Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-4 (CG) - D1-6 (CANH) Disconnect the negative battery cable 200 ohms or higher D1-4 (CG) - D1-14 (CANL) Disconnect the negative battery cable 200 ohms or higher NG: CHECK CAN BUS WIRE (FOR SHORT TO GND) OK: PROCEED TO 'HOW TO PROCEED WITH TROUBLESHOOTING'

There may be an open circuit in the CAN bus main line and/or the DLC3 sub bus line when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is 69 ohms or higher.

SYMPTOM CHART

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1. CHECK DLC3 Turn the ignition switch off. Measure the resistance according to the value (s) in the table below. Result RESULT REFERENCE Tester Connection Condition Specified Value Proceed to D1-6 (CANH) -D1-14 (CANL) Disconnect the negative battery cable 108 to 132 ohms A D1-6 (CANH) -D1-14 (CANL) Disconnect the negative battery cable 132 ohms or higher B NOTE: When the measured value is 132 ohms or higher and the CAN communication system diagnostic code is output, there may be a fault besides an open in the DLC3 sub bus line. For that reason, troubleshooting should be performed again from " «HOW TO PROCEED WITH TROUBLESHOOTING» " after repairing the trouble area. B: REPLACE DLC3 BRANCH WIRE OR CONNECTOR A: Go to next step
2. CHECK CAN MAIN BUS LINE FOR DISCONNECTION (BUS CHECK) Perform "BUS CHECK" using the intelligent tester via CAN VIM (See «DIAGNOSIS SYSTEM» ). Result RESULT REFERENCE Specified Value Proceed to "STEERING SENSOR" only is not displayed A "HV CONTROL" only is not displayed B Others C B: GO TO step 4 C: GO TO step 5 A: Go to next step
3. CHECK CAN MAIN BUS LINE FOR DISCONNECTION (STEERING SENSOR - CAN CENTER J/C) Disconnect the steering sensor connector (S10). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value S10-10 (CANH) - S10-9 (CANL) Disconnect the negative battery cable 108 to 132 ohms NG: REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR OK: REPLACE STEERING SENSOR
4. CHECK CAN MAIN BUS LINE FOR DISCONNECTION (HV CONTROL ECU - CAN RH J/C) Disconnect the HV control ECU connector (H30). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value H30-25 (CANH) - H30-33 (CANL) Disconnect the negative battery cable 108 to 132 ohms NG: REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR OK: REPLACE HV CONTROL ECU
5. CHECK CAN MAIN BUS LINE FOR DISCONNECTION Disconnect the steering sensor connector (S10). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value S10-10 (CANH) - S10-9 (CANL) Disconnect the negative battery cable 108 to 132 ohms OK: REPLACE STEERING SENSOR NG: Go to next step
6. CONNECT CONNECTOR Reconnect the steering sensor connector (S10).
7. CHECK CAN MAIN BUS LINE FOR DISCONNECTION Disconnect the steering sensor main bus line connector (J55) from the CAN center J/C B side (without earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value J55-1 (CANH) - J55-2 (CANL) Disconnect the negative battery cable 108 to 132 ohms NG: REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR OK: Go to next step
8. CONNECT CONNECTOR Reconnect the steering sensor main bus line connector (J55) to the CAN center J/C B side (without earth terminal).
9. CHECK CAN MAIN BUS LINE FOR DISCONNECTION Disconnect the CAN main bus line connector (J52) from the CAN center J/C A side (with earth terminal). Measure the resistance according to the value (s) in the table below. Standard Resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value J52-1 (CANH) - J52-2 (CANL) Disconnect the negative battery cable 108 to 132 ohms OK: REPLACE JUNCTION CONNECTOR NG: Go to next step
10. CONNECT CONNECTOR Reconnect the CAN main bus line connector (J52) to the CAN center J/C A side (with earth terminal).
11. CHECK CAN MAIN BUS LINE FOR DISCONNECTION Disconnect the CAN main bus line connector (J27) from the CAN RH J/C B side (without earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value J27-1 (CANH) - J27-2 (CANL) Disconnect the negative battery cable 108 to 132 ohms NG: REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR OK: Go to next step
12. CONNECT CONNECTOR Reconnect the CAN main bus line connector (J27) to the CAN RH J/C B side (without earth terminal).
13. CHECK CAN MAIN BUS LINE FOR DISCONNECTION Disconnect the HV control ECU main bus line connector (J56) from the CAN RH J/C B side (without earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value (CANH) - (CANL) Disconnect the negative battery cable 108 to 132 ohms NG: REPLACE JUNCTION CONNECTOR OK: Go to next step
14. CONNECT CONNECTOR Reconnect the HV control ECU main bus line (J56) to the CAN RH J/C B side (without earth terminal).
15. CHECK CAN MAIN BUS LINE FOR DISCONNECTION Disconnect the HV control ECU connector (H30). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value H30-25 (CANH) - H30-33 (CANL) Disconnect the negative battery cable 108 to 132 ohms OK: REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR NG: REPLACE HV CONTROL ECU

There may be a short circuit between the CAN bus lines when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is below 54 fl.

SYMPTOM CHART

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1. CHECK CAN BUS LINES FOR SHORT CIRCUIT (DLC3 SUB BUS LINE) Disconnect the DLC3 sub bus line connector (J54) from the CAN center J/C A side (with earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-14 (CANL) Disconnect the negative battery cable 1 Mohms or higher NG: REPAIR OR REPLACE DLC3 BRANCH WIRE OR CONNECTOR OK: Go to next step
2. CONNECT CONNECTOR Reconnect the CAN main bus line connector (J54) to the CAN center J/C A side (with earth terminal).
3. CHECK CAN BUS LINES FOR SHORT CIRCUIT (CAN BUSES TO CAN RH J/C) Disconnect the CAN main bus line connector (J27) from the CAN RH J/C B side (without earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-14 (CANL) Disconnect the negative battery cable 108 to 132 ohms OK: GO TO step 20 NG: Go to next step
4. CONNECT CONNECTOR Reconnect the CAN main bus line connector (J27) to the CAN center J/C B side (without earth terminal).
5. CHECK CAN BUS LINES FOR SHORT CIRCUIT (POWER STEERING ECU SUB BUS LINE) Disconnect the power steering ECU sub bus line connector (J50) from the CAN center J/C A side (with earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-14 (CANL) Disconnect the negative battery cable 54 to 69 ohms OK: GO TO step 12 NG: Go to next step
6. CONNECT CONNECTOR Reconnect the power steering ECU sub bus line connector (J50) to the CAN center J/C A side (with earth terminal).
7. CHECK CAN BUS LINES FOR SHORT CIRCUIT (GATEWAY ECU SUB BUS LINE) Disconnect the gateway ECU sub bus line connector (J53) from the CAN center J/C A side (with earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-14 (CANL) Disconnect the negative battery cable 54 to 69 ohms OK: GO TO step 14 NG: Go to next step
8. CONNECT CONNECTOR Reconnect the gateway ECU sub bus line connector (J53) to the CAN center J/C A side (with earth terminal).
9. CHECK CAN BUS LINES FOR SHORT CIRCUIT (STEERING SENSOR MAIN BUS LINE) Disconnect the steering sensor main bus line connector (J55) from the CAN center J/C B side (without earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-14 (CANL) Disconnect the negative battery cable 54 to 69 ohms OK: GO TO step 16 NG: Go to next step
10. CONNECT CONNECTOR Reconnect the steering sensor main bus line connector (J55) to the CAN center J/C B side (without earth terminal).
11. CHECK CAN BUS LINES FOR SHORT CIRCUIT (DISTANCE CONTROL ECU SUB BUS LINE) Disconnect the distance control ECU sub bus line connector (J51) from the CAN center J/C B side (without earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-14 (CANL) Disconnect the negative battery cable 54 to 69 ohms OK: GO TO step 18 NG: REPLACE JUNCTION CONNECTOR (CAN CENTER J/C)
12. CONNECT CONNECTOR Reconnect the power steering ECU sub bus line connector (J50) to the CAN center J/C A side (with earth terminal).
13. CHECK CAN BUS LINES FOR SHORT CIRCUIT (POWER STEERING ECU SUB BUS LINE) Disconnect the power steering ECU connector (P41). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-14 (CANL) Disconnect the negative battery cable 54 to 69 ohms OK: REPLACE POWER STEERING ECU NG: REPAIR OR REPLACE POWER STEERING ECU BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L)
14. CONNECT CONNECTOR Reconnect the gateway ECU sub bus line connector (J53) to the CAN center J/C A side (with earth terminal).
15. CHECK CAN BUS LINES FOR SHORT CIRCUIT (GATEWAY ECU SUB BUS LINE) Disconnect the gateway ECU connector (G3). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-14 (CANL) Disconnect the negative battery cable 54 to 69 ohms OK: REPLACE GATEWAY ECU NG: REPAIR OR REPLACE GATEWAY ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L)
16. CONNECT CONNECTOR Reconnect the steering sensor main bus line connector (J55) to the CAN center J/C B side (without earth terminal).
17. CHECK CAN BUS LINES FOR SHORT CIRCUIT (STEERING SENSOR MAIN BUS LINE) Disconnect the steering sensor connector (S10). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-14 (CANL) Disconnect the negative battery cable 54 to 69 ohms NG: REPLACE STEERING SENSOR OK: REPAIR OR REPLACE STEERING SENSOR MAIN BUS LINE OR CONNECTOR (CAN-H, CAN-L)
18. CONNECT CONNECTOR Reconnect the distance control ECU sub bus line connector (J51) to the CAN center J/C B side (without earth terminal).
19. CHECK CAN BUS LINES FOR SHORT CIRCUIT (DISTANCE CONTROL ECU SUB BUS LINE) Disconnect the distance control ECU connector (D2). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-14 (CANL) Disconnect the negative battery cable 54 to 69 ohms OK: REPLACE DISTANCE CONTROL ECU NG: REPAIR OR REPLACE DISTANCE CONTROL ECU BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L)
20. CONNECT CONNECTOR Reconnect the CAN main bus line connector (J27) to the CAN RH J/C B side (without earth terminal).
21. CHECK CAN BUS LINES FOR SHORT CIRCUIT (SKID CONTROL ECU SUB BUS LINE) Disconnect the skid control ECU sub bus line connector (J22) from the CAN RH J/C A side (with earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-14 (CANL) Disconnect the negative battery cable 54 to 69 ohms OK: GO TO step 26 NG: Go to next step
22. CONNECT CONNECTOR Reconnect the skid control ECU sub bus line connector (J22) to the CAN RH J/C A side (with earth terminal).
23. CHECK CAN BUS LINES FOR SHORT CIRCUIT (YAW RATE SENSOR SUB BUS LINE) Disconnect the yaw rate sensor sub bus line connector (J26) from the CAN RH J/C B side (without earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-14 (CANL) Disconnect the negative battery cable 54 to 69 ohms OK: GO TO step 28 NG: Go to next step
24. CONNECT CONNECTOR Reconnect the yaw rate sensor sub bus line connector (J26) to the CAN RH J/C B side (without earth terminal).
25. CHECK CAN BUS LINES FOR SHORT CIRCUIT (HV CONTROL ECU SUB BUS LINE) Disconnect the HV control ECU main bus line connector (J56) from the CAN RH J/C B side (without earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-14 (CANL) Disconnect the negative battery cable 54 to 69 ohms OK: GO TO step 30 NG: REPLACE JUNCTION CONNECTOR (CAN RH J/C)
26. CONNECT CONNECTOR Reconnect the skid control ECU sub bus line connector (J22) to the CAN RH J/C A side (with earth terminal).
27. CHECK CAN BUS LINES FOR SHORT CIRCUIT (SKID CONTROL ECU SUB BUS LINE) Disconnect the skid control ECU connector (S39). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-14 (CANL) Disconnect the negative battery cable 54 to 69 ohms OK: REPLACE SKID CONTROL ECU NG: REPAIR OR REPLACE SKID CONTROL ECU BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L)
28. CONNECT CONNECTOR Reconnect the yaw rate sensor sub bus line connector (J26) to the CAN RH J/C B side (without earth terminal).
29. CHECK CAN BUS LINES FOR SHORT CIRCUIT (YAW RATE SENSOR SUB BUS LINE) Disconnect the yaw rate sensor connector (Y1). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-14 (CANL) Disconnect the negative battery cable 54 to 69 ohms OK: REPLACE YAW RATE SENSOR NG: REPAIR OR REPLACE YAW RATE SENSOR SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L)
30. CONNECT CONNECTOR Reconnect the HV control ECU main bus line connector (J56) to the CAN RH J/C B side (without earth terminal).
31. CHECK CAN BUS LINES FOR SHORT CIRCUIT (HV CONTROL ECU SUB BUS LINE) Disconnect the HV control ECU connector (H30). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-14 (CANL) Disconnect the negative battery cable 54 to 69 ohms OK: REPLACE HV CONTROL ECU NG: REPAIR OR REPLACE HV CONTROL ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L)

There may be a short circuit between the CAN bus line and B+ if there is continuity between terminals 6 (CANH) and 16 (BAT), or terminals 14 (CANL) and 16 (BAT) of the DLC3.

SYMPTOM CHART

Scheme 49

Scheme 50

Scheme 51

1. CHECK CAN BUS LINES FOR SHORT TO +B (DLC3 SUB BUS LINE) Disconnect the DLC3 sub bus line connector (J54) from the CAN center J/C A side (with earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-16(BAT) Disconnect the negative battery cable 1 Mohms or higher D1-14 (CANL) - D1-16 (BAT) Disconnect the negative battery cable 1 Mohms or higher NG: REPAIR OR REPLACE DLC3 BRANCH WIRE OR CONNECTOR OK: Go to next step
2. CONNECT CONNECTOR Reconnect the DLC3 sub bus line connector (J54) to the CAN center J/C A side (with earth terminal).
3. CHECK CAN BUS LINES FOR SHORT TO +B (CAN BUSES TO CAN RH J/C) Disconnect the CAN main bus line connector (J27) from the CAN RH J/C B side (without earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher D1-14 (CANL) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher OK: GO TO step 18 NG: Go to next step
4. CONNECT CONNECTOR Reconnect the CAN main bus line connector (J27) to the CAN RH J/C B side (without earth terminal).
5. CHECK CAN BUS LINES FOR SHORT TO +B (POWER STEERING ECU SUB BUS LINE) Disconnect the power steering ECU sub bus line connector (J50) from the CAN center J/C A side (with earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher D1-14 (CANL) -D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher OK: GO TO step 12 NG: Go to next step
6. CONNECT CONNECTOR Reconnect the power steering ECU sub bus line connector (J50) to the CAN center J/C A side (with earth terminal).
7. CHECK CAN BUS LINES FOR SHORT TO +B (GATEWAY ECU SUB BUS LINE) Disconnect the gateway ECU sub bus line connector (J53) from the CAN center J/C A side (with earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher D1-14 (CANL) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher OK: GO TO step 14 NG: Go to next step
8. CONNECT CONNECTOR Reconnect the gateway ECU sub bus line connector (J53) to the CAN center J/C A side (with earth terminal).
9. CHECK CAN BUS LINES FOR SHORT TO +B (DISTANCE CONTROL ECU SUB BUS LINE) Disconnect the distance control ECU sub bus line connector (J51) from the CAN center J/C B side (without earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher D1-14 (CANL) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher OK: GO TO step 16 NG: Go to next step
10. CONNECT CONNECTOR Reconnect the distance control ECU sub bus line connector (J51) to the CAN center J/C B side (without earth terminal).
11. CHECK CAN BUS LINES FOR SHORT TO +B (STEERING SENSOR MAIN BUS LINE) Disconnect the steering sensor connector (S10). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher D1-14 (CANL) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher OK: REPLACE STEERING SENSOR NG: REPAIR OR REPLACE STEERING SENSOR MAIN BUS LINE OR CONNECTOR (CAN-H, CAN-L)
12. CONNECT CONNECTOR Reconnect the power steering ECU sub bus line connector (J50) to the CAN center J/C A side (with earth terminal).
13. CHECK CAN BUS LINES FOR SHORT TO +B (POWER STEERING ECU SUB BUS LINE) Disconnect the power steering ECU connector (P41). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher D1-14 (CANL) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher OK: REPLACE POWER STEERING ECU NG: REPAIR OR REPLACE POWER STEERING ECU BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L)
14. CONNECT CONNECTOR Reconnect the gateway ECU sub bus line connector (J53) to the CAN center J/C A side (with earth terminal).
15. CHECK CAN BUS LINES FOR SHORT TO +B (NETWORK GATEWAY ECU SUB BUS LINE) Disconnect the gateway ECU connector (G3). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher D1-14 (CANL) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher OK: REPLACE GATEWAY ECU NG: REPAIR OR REPLACE GATEWAY ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L)
16. CONNECT CONNECTOR Reconnect the distance control ECU sub bus line connector (J51) to the CAN center J/C B side (without earth terminal).
17. CHECK CAN BUS LINES FOR SHORT TO +B (DISTANCE CONTROL ECU SUB BUS LINE) Disconnect the distance control ECU connector (D2). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher D1-14 (CANL) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher OK: REPLACE DISTANCE CONTROL ECU NG: REPAIR OR REPLACE DISTANCE CONTROL ECU BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L)
18. CONNECT CONNECTOR Reconnect the CAN main bus line connector (J27) to the CAN RH J/C B side (without earth terminal).
19. CHECK CAN BUS LINES FOR SHORT TO +B (SKID CONTROL ECU SUB BUS LINE) Disconnect the skid control ECU sub bus line connector (J22) from the CAN RH J/C A side (with earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher D1-14 (CANL) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher OK: GO TO step 24 NG: Go to next step
20. CONNECT CONNECTOR Reconnect the skid control ECU sub bus line connector (J22) to the CAN RH J/C A side (with earth terminal).
21. CHECK CAN BUS LINES FOR SHORT TO +B (YAW RATE SENSOR SUB BUS LINE) Disconnect the yaw rate sensor sub bus line connector (J26) from the CAN RH J/C B side (without earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher D1-14 (CANL) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher OK: GO TO step 26 NG: Go to next step
22. CONNECT CONNECTOR Reconnect the yaw rate sensor sub bus line connector (J26) to the CAN RH J/C B side (without earth terminal).
23. CHECK CAN BUS LINES FOR SHORT TO +B (HV CONTROL ECU MAIN BUS LINE) Disconnect the HV control ECU connector (H30). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher D1-14 (CANL) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher OK: REPLACE HV CONTROL ECU NG: REPAIR OR REPLACE HV CONTROL ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L)
24. CONNECT CONNECTOR Reconnect the skid control ECU sub bus line connector (J22) to the CAN RH J/C A side (with earth terminal).
25. CHECK CAN BUS LINES FOR SHORT TO +B (SKID CONTROL ECU SUB BUS LINE) Disconnect the skid control ECU connector (S39). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher D1-14 (CANL) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher OK: REPLACE SKID CONTROL ECU NG: REPAIR OR REPLACE SKID CONTROL ECU BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L)
26. CONNECT CONNECTOR Reconnect the yaw rate sensor sub bus line connector (J26) to the CAN RH J/C B side (without earth terminal).
27. CHECK CAN BUS LINES FOR SHORT TO +B (YAW RATE SENSOR SUB BUS LINE) Disconnect the yaw rate sensor ECU connector (Y1). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher D1-14 (CANL) - D1-16 (BAT) Disconnect the negative battery cable 6 kohms or higher OK: REPLACE YAW RATE SENSOR NG: REPAIR OR REPLACE YAW RATE SENSOR SUB BUS LINE CONNECTOR (CAN-H, CAN-L)

There may be a short circuit between the CAN bus line and GND if there is continuity between terminals 6 (CANH) and 4 (CG) or terminals 14 (CANL) and 4 (CG) of the DLC3.

SYMPTOM CHART

Scheme 52

1. CHECK CAN BUS LINE FOR SHORT TO GND (DLC3 SUB BUS LINE) Disconnect the DLC3 sub bus line connector (J54) from the CAN center J/C A side (with earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-4 (CG) Disconnect the negative battery cable 1 Mohms or higher D1-14 (CANL) - D1-4 (CG) Disconnect the negative battery cable 1 Mohms or higher NG: REPAIR OR REPLACE DLC3 BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L) OK: Go to next step
2. CONNECT CONNECTOR Reconnect the CAN main bus line connector (J54) to the CAN center J/C A side (with earth terminal).
3. CHECK CAN BUS LINE FOR SHORT TO GND (CAN BUSES TO D-CAN J/C) Disconnect the CAN main bus line connector (J27) from the CAN RH J/C B side (without earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher D1-14 (CANL) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher OK: GO TO step 20 NG: Go to next step
4. CONNECT CONNECTOR Reconnect the CAN main bus line connector (J27) to the CAN RH J/C B side (without earth terminal).
5. CHECK CAN BUS LINE FOR SHORT TO GND (POWER STEERING ECU SUB BUS LINE) Disconnect the power steering ECU sub bus line connector (J50) from the CAN center J/C A side (with earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher D1-14 (CANL) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher OK: GO TO step 12 NG: Go to next step
6. CONNECT CONNECTOR Reconnect the power steering ECU sub bus line connector (J50) to the CAN center J/C A side (with earth terminal).
7. CHECK CAN BUS LINE FOR SHORT TO GND (NETWORK GATEWAY ECU SUB BUS LINE) Disconnect the gateway ECU sub bus line connector (J53) from the CAN center J/C A side (without earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher D1-14 (CANL) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher OK: GO TO step 14 NG: Go to next step
8. CONNECT CONNECTOR Reconnect the gateway ECU sub bus line connector (J53) to the CAN center J/C A side (with earth terminal).
9. CHECK CAN BUS LINE FOR SHORT TO GND (STEERING SENSOR SUB BUS LINE) Disconnect the steering sensor main bus line connector (J55) from the CAN center J/C B side (without earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher D1-14 (CANL) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher OK: GO TO step 16 NG: Go to next step
10. CONNECT CONNECTOR Reconnect the steering sensor main bus line connector (J55) to the CAN center J/C B side (without earth terminal).
11. CHECK CAN BUS LINE FOR SHORT TO GND (DISTANCE CONTROL ECU SUB BUS LINE) Disconnect the distance control ECU sub bus line connector (J51) from the CAN center J/C B side (without earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher D1-14 (CANL) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher OK: GO TO step 18 NG: REPLACE JUNCTION CONNECTOR (CAN CENTER J/C)
12. CONNECT CONNECTOR Reconnect the power steering ECU sub bus line connector (J50) to the CAN center J/C A side (with earth terminal).
13. CHECK CAN BUS LINE FOR SHORT TO GND (POWER STEERING ECU SUB BUS LINE) Disconnect the power steering ECU connector (P41). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher D1-14 (CANL) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher OK: REPLACE POWER STEERING ECU NG: REPAIR OR REPLACE POWER STEERING ECU BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L)
14. CONNECT CONNECTOR Reconnect the gateway ECU sub bus line connector (J53) to the CAN center J/C A side (with earth terminal).
15. CHECK CAN BUS LINE FOR SHORT TO GND (NETWORK GATEWAY ECU SUB BUS LINE) Disconnect the gateway connector (G3). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher D1-14 (CANL) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher OK: REPLACE GATEWAY ECU NG: REPAIR OR REPLACE GATEWAY ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L)
16. CONNECT CONNECTOR Reconnect the steering sensor main bus line connector (J55) to the CAN center J/C B side (without earth terminal).
17. CHECK CAN BUS LINE FOR SHORT TO GND (STEERING SENSOR MAIN BUS LINE) Disconnect the steering sensor connector (S10). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher D1-14 (CANL) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher NG: REPLACE STEERING SENSOR OK: REPAIR OR REPLACE STEERING SENSOR MAIN BUS LINE OR CONNECTOR (CAN-H, CAN-L)
18. CONNECT CONNECTOR Reconnect the distance control ECU sub bus line connector (J51) to the CAN center J/C B side (without earth terminal).
19. CHECK CAN BUS LINE FOR SHORT TO GND (DISTANCE CONTROL ECU SUB BUS LINE) Disconnect the distance control ECU connector (D2). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher D1-14 (CANL) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher OK: REPLACE DISTANCE CONTROL ECU NG: REPAIR OR REPLACE DISTANCE CONTROL ECU BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L)
20. CONNECT CONNECTOR Reconnect the CAN main bus line connector (J27) to the CAN RH J/C B side (without earth terminal).
21. CHECK CAN BUS LINE FOR SHORT TO GND (SKID CONTROL ECU SUB BUS LINE) Disconnect the skid control ECU sub bus line connector (J22) from the CAN RH J/C A side (with earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher D1-14 (CANL) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher OK: GO TO step 26 NG: Go to next step
22. CONNECT CONNECTOR Reconnect the skid control ECU sub bus line connector (J22) to the CAN RH J/C A side (with earth terminal).
23. CHECK CAN BUS LINE FOR SHORT TO GND (YAW RATE SENSOR ECU SUB BUS LINE) Disconnect the yaw rate sensor sub bus line connector (J26) from the CAN RH J/C B side (without earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher D1-14 (CANL) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher OK: GO TO step 28 NG: Go to next step
24. CONNECT CONNECTOR Reconnect the yaw rate sensor sub bus line connector (J26) to the CAN RH J/C B side (without earth terminal).
25. CHECK CAN BUS LINE FOR SHORT TO GND (HV CONTROL ECU SUB BUS LINE) Disconnect the HV control ECU main bus line connector (J56) from the CAN RH J/C B side (without earth terminal). NOTE: Before disconnecting the connector, make a note of where it is connected. Reconnect the connector to its original position. Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher D1-14 (CANL) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher OK: GO TO step 30 NG: REPLACE JUNCTION CONNECTOR (CAN RH J/C)
26. CONNECT CONNECTOR Reconnect the skid control ECU sub bus line connector (J22) to the CAN RH J/C A side (with earth terminal).
27. CHECK CAN BUS LINE FOR SHORT TO GND (SKID CONTROL ECU SUB BUS LINE) Disconnect the skid control ECU connector (S39). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher D1-14 (CANL) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher OK: REPLACE SKID CONTROL ECU NG: REPAIR OR REPLACE SKID CONTROL ECU BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L)
28. CONNECT CONNECTOR Reconnect the yaw rate sensor sub bus line connector (J26) to the CAN RH J/C B side (without earth terminal).
29. CHECK CAN BUS LINE FOR SHORT TO GND (YAW RATE SENSOR SUB BUS LINE) Disconnect the yaw rate sensor connector (Y1). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher D1-14 (CANL) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher OK: REPLACE YAW RATE SENSOR NG: REPAIR OR REPLACE YAW RATE SENSOR SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L)
30. CONNECT CONNECTOR Reconnect the HV control ECU main bus line connector (J56) to the CAN RH J/C B side (without earth terminal).
31. CHECK CAN BUS LINE FOR SHORT TO GND (HV CONTROL ECU SUB BUS LINE) Disconnect the HV control ECU connector (H30). Measure the resistance according to the value (s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Value D1-6 (CANH) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher D1-14 (CANL) - D1-4 (CG) Disconnect the negative battery cable 200 ohms or higher OK: REPLACE HV CONTROL ECU NG: REPAIR OR REPLACE HV CONTROL ECU MAIN BUS LINE OR CONNECTOR

If 2 or more ECUs and/or sensors do not appear on the intelligent tester "BUS CHECK" screen via the CAN VIM, one side of the CAN sub-bus lines may be open. (One side of the CAN-H [sub-bus line] / CAN-L [sub-bus line] of the ECU and/or sensor is open.)

SYMPTOM CHART

Scheme 53

See also:
• AIRBAG SYSTEM
• DTC CHECK / CLEAR