CAN Communication System: Overview Toyota Prius 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 a driving hazard.
2. SRS AIRBAG SYSTEM HANDLING PRECAUTIONS The vehicle is equipped with an SRS (Supplemental Restraint System) such as the driver's airbag and front passenger airbag. Failure to carry out service operations in correct sequence could cause unexpected SRS deployment during servicing and may lead to a serious accident. Before servicing (including installation/removal, inspection and replacement of parts), be sure to read the precautionary notice for the supplemental restraint system (See «PRECAUTION»(ref-307039-S34846330152008123100000) ).
3. CONNECTOR HANDLING When inserting tester probes into a connector, insert them from the rear of the connector. Use a repair wire to check the connector if it is impossible to check continuity from the rear of the connector.
4. PRECAUTION FOR DISCONNECTING THE BATTERY CABLE NOTE: When disconnecting the negative (-) battery terminal, initialize the following system after the terminal is reconnected. CAN COMMUNICATION SYSTEM REFERENCE System Name See procedure Power Window Control System «INITIALIZATION»(ref-289861-S01642846932008070800000)

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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 ECM, hybrid vehicle control ECU, and battery ECU use 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 multiplex communication system equipped for a vehicle and has a high communication speed (500 kbps) and a function to detect malfunctions. By pairing the CANH and CANL bus lines, the CAN performs communication based on differential voltage. The many ECUs (sensors) installed on the vehicle operate by sharing information and communicating with each other. The CAN has 2 resistors of 120 ohms which are necessary to communicate with the main wire.
2. DEFINITION OF TERMS Main wire The main wire is the wire harness between the 2 terminus circuits on the bus (communication line). This is the main bus in the CAN communication system. Branch wire The branch wire is the wire harness which diverges from the main wire to the ECU or sensor. Terminus circuit The terminus circuit is a circuit which is placed to convert communication current of the CAN communication into bus voltage. It consists of a resistor and condenser. 2 terminus circuits are necessary on a bus.
3. ECUS OR SENSORS WHICH COMMUNICATE THROUGH CAN COMMUNICATION SYSTEM Hybrid Vehicle Control ECU Battery ECU ECM Skid Control ECU Steering Angle Sensor Yaw Rate Sensor Power Steering ECU Gateway ECU
4. DIAGNOSTIC CODE FOR CAN COMMUNICATION SYSTEM DTCs for the CAN communication system are as follows: U0123, U0124, U0126, U0293, U0100, U0073, U0111, U0129, U0131, U0146, P3108-594 NOTE: If U0146 or P3108-594 is output, the multiplex communication system may be malfunctioning.
5. REMARKS FOR TROUBLESHOOTING Trouble in the CAN bus (communication line) can be checked from the DLC3 (except when there is a wire break other than in the branch wire of the DLC3). NOTE: Do not insert the tester directly into the DLC3 connector. Be sure to use a service wire. DTCs regarding the CAN communication system can be checked using the Techstream via the CAN VIM. The CAN communication system cannot detect trouble in the branch wire of the DLC3 even though the DLC3 is also connected to the CAN communication system.

DESCRIPTION

DETECTION ITEM AND TROUBLE AREA

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1. CHECK CAN BUS LINE FOR DISCONNECTION (HYBRID VEHICLE CONTROL ECU BRANCH WIRE) Disconnect the H14 hybrid vehicle control ECU connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition H14-8 (CANH) - H14-9 (CANL) Power switch OFF 54 to 69 ohms NG : REPLACE HYBRID VEHICLE CONTROL ECU BRANCH WIRE AND CONNECTOR (CANH, CANL) OK : GO TO NEXT STEP
2. CHECK WIRE HARNESS (HYBRID VEHICLE CONTROL ECU - BATTERY AND BODY GROUND) Disconnect the H16 hybrid vehicle control ECU connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Specified Condition H14-1 (GND1) - Body ground Below 1 ohms H14-4 (GND2) - Body ground Below 1 ohms Measure the voltage of the wire harness side connectors. Standard voltage TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition H16-7 (+B1) - Body ground Power switch ON (IG) 10 to 14 V H16-6 (+B2) - Body ground Power switch ON (IG) 10 to 14 V NG : REPAIR OR REPLACE HARNESS AND CONNECTOR OK : REPLACE HYBRID VEHICLE CONTROL ECU

DETECTION ITEM AND TROUBLE AREA

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1. CHECK CAN BUS LINE FOR DISCONNECTION (SKID CONTROL ECU BRANCH WIRE) Disconnect the S8 skid control ECU connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition S8-19 (CANH) - S8-18 (CANL) Power switch OFF 54 to 69 ohms NG : REPLACE SKID CONTROL ECU BRANCH WIRE AND CONNECTOR (CANH, CANL) OK : GO TO NEXT STEP
2. CHECK WIRE HARNESS (SKID CONTROL ECU - BATTERY AND BODY GROUND) Disconnect the S7, S9 and S10 skid control ECU connectors. Measure the resistance of the wire harness side connectors. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Specified Condition S7-1 (GND) - Body ground Below 1 ohms S8-1 (GND3) - Body ground Below 1 ohms S8-2 (GND2) - Body ground Below 1 ohms S9-1 (GND5) - Body ground Below 1 ohms S9-2 (GND4) - Body ground Below 1 ohms S10-4 (GND6) - Body ground Below 1 ohms Measure the voltage of the wire harness side connectors. Standard voltage TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition S8-7 (IG1) - Body ground Power switch ON (IG) 10 to 14 V S10-5 (IG2) - Body ground Power switch ON (IG) 10 to 14 V NG : REPAIR OR REPLACE HARNESS AND CONNECTOR OK : REPLACE SKID CONTROL ECU

DETECTION ITEM AND TROUBLE AREA

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1. CHECK CAN BUS LINE FOR DISCONNECTION (POWER STEERING ECU BRANCH WIRE) Disconnect the P8 power steering ECU connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition P8-1 (CANH) - P8-7 (CANL) Power switch OFF 54 to 69 ohms NG : REPLACE POWER STEERING ECU BRANCH WIRE AND CONNECTOR (CANH, CANL) OK : GO TO NEXT STEP
2. CHECK WIRE HARNESS (POWER STEERING ECU - BATTERY AND BODY GROUND) Wire Harness Side Disconnect the P7 power steering ECU connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Specified Condition P7-2 (PGND) - Body ground Below 1 ohms Measure the voltage of the wire harness side connector. Standard voltage TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition P8-6 (IG) - Body ground Power switch ON (IG) 10 to 14 V NG : REPAIR OR REPLACE HARNESS AND CONNECTOR OK : REPLACE POWER STEERING ECU

DETECTION ITEM AND TROUBLE AREA

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1. CHECK CAN BUS LINE FOR DISCONNECTION (GATEWAY ECU BRANCH WIRE) Disconnect the G1 gateway ECU connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition G1-17 (CA1H) - G1-18 (CA1L) Power switch OFF 54 to 69 ohms NG : REPLACE GATEWAY ECU BRANCH WIRE AND CONNECTOR (CA1H, CA1L) OK : GO TO NEXT STEP
2. CHECK WIRE HARNESS (GATEWAY ECU - BATTERY AND BODY GROUND) Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Specified Condition G1-24 (GND) - Body ground Below 1 ohms Measure the voltage of the wire harness side connector. Standard voltage TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition G1-10 (BATT) - Body ground Always 10 to 14 V G1-2 (ACC) - Body ground Power switch ON (ACC) 10 to 14 V G1-1 (IG) - Body ground Power switch ON (IG) 10 to 14 V NG : REPAIR OR REPLACE HARNESS AND CONNECTOR OK : REPLACE GATEWAY ECU

DETECTION ITEM AND TROUBLE AREA

Note. This detection item is not applicable to a vehicle without enhanced VSC.

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1. CHECK CAN BUS LINE FOR DISCONNECTION (STEERING ANGLE SENSOR BRANCH Disconnect the S13 steering angle sensor connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition S13-10 (CANH) - S3-9 (CANL) Power switch OFF 54 to 69 ohms NG : REPLACE STEERING ANGLE SENSOR BRANCH WIRE AND CONNECTOR (CANH, CANL) OK : GO TO NEXT STEP
2. CHECK WIRE HARNESS (STEERING ANGLE SENSOR - BATTERY AND BODY GROUND) Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Specified Condition S13-2 (ESS) - Body ground Below 1 ohms Measure the voltage of the wire harness side connector. Standard voltage TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition S13-1 (IG) - Body ground Power switch ON (IG) 10 to 14 V NG : REPAIR OR REPLACE HARNESS AND CONNECTOR OK : REPLACE STEERING ANGLE SENSOR

DETECTION ITEM AND TROUBLE AREA

Note. This detection item is not applicable to a vehicle without enhanced VSC.

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1. CHECK CAN BUS LINE FOR DISCONNECTION (YAW RATE SENSOR BRANCH WIRE) Disconnect the Y1 yaw rate sensor connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition Y1-2 (CANL) - Y1-3 (CANH) Power switch OFF 54 to 69 ohms NG : REPLACE YAW RATE SENSOR BRANCH WIRE AND CONNECTOR (CANH, CANL) OK : GO TO NEXT STEP
2. CHECK WIRE HARNESS (YAW RATE SENSOR - BATTERY AND BODY GROUND) Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Specified Condition Y1-1 (GND) - Body ground Below 1 ohms Measure the voltage of the wire harness side connector. Standard voltage TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition Y1-5 (IG)- Body ground Power switch ON (IG) 10 to 14 V NG : REPAIR OR REPLACE HARNESS AND CONNECTOR OK : REPLACE YAW RATE SENSOR

DETECTION ITEM AND TROUBLE AREA

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1. CHECK WIRE HARNESS (ECM - BATTERY AND BODY GROUND) Disconnect the E4, E5, E6 and E7 ECM connectors. Measure the resistance of the wire harness side connectors. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Specified Condition E4-1 (E04) - Body ground Below 1 ohms E4-6 (E02) - Body ground Below 1 ohms E4-7 (E01) - Body ground Below 1 ohms E5-3 (ME01) - Body ground Below 1 ohms E5-28 (E1) - Body ground Below 1 ohms E6-7 (E03) - Body ground Below 1 ohms Measure the voltage of the wire harness side connector. Standard voltage TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition E7-4 (+B) - Body ground Power switch OFF 10 to 14 V NG : REPAIR OR REPLACE HARNESS AND CONNECTOR OK : REPLACE ECM

DETECTION ITEM AND TROUBLE AREA

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1. CHECK WIRE HARNESS (BATTERY ECU - BATTERY AND BODY GROUND) Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Specified Condition B11-12 (GND) - Body ground Below 1 ohms Measure the voltage of the wire harness side connector. Standard voltage TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition B11-1 (AM) - Body ground Always 10 to 14 V B11-2 (IGCT) - Body ground Power switch ON (IG) 10 to 14 V B11-13 (IG2) - Body ground Power switch ON (IG) 10 to 14 V NG : REPAIR OR REPLACE HARNESS AND CONNECTOR OK : REPLACE BATTERY ECU

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

SYMPTOM - TROUBLE AREA

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1. CHECK DLC3 Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition Proceed to D1-6 (CANH) - D1-14 (CANL) Power switch OFF 108 to 132 ohms A D1-6 (CANH) - D1-14 (CANL) Power switch OFF 132 ohms or more B NOTE: When the measured value is 132 ohms or more and the CAN communication system DTC is output, there may be a fault besides disconnection of the DLC3 branch wire. For that reason, troubleshooting should be performed again from «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-289875-S38566565182008070800000) after repairing the trouble area. B: REPLACE DLC3 BRANCH WIRE AND CONNECTOR (CANH, CANL) A: GO TO NEXT STEP
2. CHECK CAN MAIN WIRE FOR DISCONNECTION (BUS CHECK) Perform "BUS CHECK" using the intelligent tester via the CAN VIM (see «DIAGNOSIS SYSTEM»(ref-289875-S33449633502008070800000) ). Result RESULT Result Proceed to Only "ENGINE" is not displayed A Only "HV BATTERY" is not displayed B Other ("ENGINE" and "HV BATTERY" are not displayed) C B: Go to step 4 C: Go to step 5 A: GO TO NEXT STEP
3. CHECK CAN MAIN WIRE FOR DISCONNECTION (ECM - J/C2) Disconnect the E6 ECM connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition E6-31 (CANH) - E6-30 (CANL) Power switch OFF 108 to 132 ohms NG : REPLACE CAN MAIN WIRE AND CONNECTOR (ECM - J/C2) OK : REPLACE ECM
4. CHECK CAN MAIN WIRE FOR DISCONNECTION (BATTERY ECU - J/C1) Disconnect the B11 battery ECU connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition B11-18 (CANH) - B11-19 (CANL) Power switch OFF 108 to 132 ohms NG : REPLACE CAN MAIN WIRE AND CONNECTOR (BATTERY ECU - J/C1) OK : REPLACE BATTERY ECU
5. CHECK CAN MAIN WIRE FOR DISCONNECTION (J/C1 - ECM) Disconnect the J15 J/C1 connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition J15-17 (CANH) - J15-6 (CANL) Power switch OFF 108 to 132 ohms NG : Go to step 8 OK : GO TO NEXT STEP
6. CONNECT CONNECTOR Reconnect the J15 J/C1 connector. NEXT
7. CHECK CAN MAIN WIRE FOR DISCONNECTION (BATTERY ECU - J/C1) Disconnect the B11 battery ECU connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition B11-18 (CANH) - B11-19 (CANL) Power switch OFF 108 to 132 ohms NG : REPLACE CAN MAIN WIRE AND CONNECTOR (BATTERY ECU - J/C1) OK : REPLACE BATTERY ECU
8. CONNECT CONNECTOR Reconnect the J15 J/C1 connector. NEXT
9. CHECK CAN MAIN WIRE FOR DISCONNECTION (J/C2 - J/C1) Disconnect the J18 J/C2 connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition J18-18 (CANH) - J18-7 (CANL) Power switch OFF 108 to 132 ohms NG : REPLACE CAN MAIN WIRE AND CONNECTOR (J/C2 - J/C1) OK : GO TO NEXT STEP
10. CONNECT CONNECTOR Reconnect the J18 J/C2 connector. NEXT
11. CHECK CAN MAIN WIRE FOR DISCONNECTION (ECM - J/C2) Disconnect the E6 ECM connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition E6-31 (CANH) - E6-30 (CANL) Power switch OFF 108 to 132 ohms NG : REPLACE CAN MAIN WIRE AND CONNECTOR OK : REPLACE ECM

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 ohms.

SYMPTOM - TROUBLE AREA

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1. CHECK CAN BUS LINES FOR SHORT CIRCUIT (DLC3 BRANCH WIRE) Disconnect the J15 J/C1 connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-14 (CANL) Power switch OFF 1 Mohms or more NG : REPLACE DLC3 BRANCH WIRE AND CONNECTOR (CANH, CANL) OK : GO TO NEXT STEP
2. CONNECT CONNECTOR Reconnect the J15 J/C1 connector. NEXT
3. CHECK CAN BUS LINES FOR SHORT CIRCUIT (CAN BUSES TO J/C2) Disconnect the J18 J/C2 connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-14 (CANL) Power switch OFF 108 to 132 ohms OK : Go to step 17 NG : GO TO NEXT STEP
4. CHECK CAN BUS LINES FOR SHORT CIRCUIT (J/C1 - J/C2) Disconnect the J15 J/C1 connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition J15-17 (CANH) - J15-6 (CANL) Power switch OFF 1 Mohms or more HINT: Measure the resistance with the J18 J/C2 connector disconnected. NG : REPLACE CAN MAIN WIRE AND CONNECTOR (J/C1 - J/C2) OK : GO TO NEXT STEP
5. CONNECT CONNECTOR Reconnect the J15 J/C1 connector and J18 J/C2 connector. NEXT
6. CHECK CAN BUS LINES FOR SHORT CIRCUIT (BATTERY ECU) Disconnect the B11 battery ECU connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-14 (CANL) Power switch OFF 108 to 132 ohms OK : REPLACE BATTERY ECU NG : GO TO NEXT STEP
7. CHECK CAN BUS LINES FOR SHORT CIRCUIT (BATTERY ECU - J/C1) Disconnect the J15 J/C1 connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition B11-18 (CANH) - B11-19 (CANL) Power switch OFF 1 Mohms or more HINT: Measure the resistance with the B11 battery ECU connector disconnected. NG : REPLACE CAN MAIN WIRE AND CONNECTOR (BATTERY ECU - J/C1) OK : GO TO NEXT STEP
8. CONNECT CONNECTOR Reconnect the B11 battery ECU connector and J15 J/C1 connector. NEXT
9. CHECK CAN BUS LINES FOR SHORT CIRCUIT (POWER STEERING ECU) Disconnect the P8 power steering ECU connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-14 (CANL) Power switch OFF 54 to 69 ohms OK : REPLACE POWER STEERING ECU NG : GO TO NEXT STEP
10. CHECK CAN BUS LINES FOR SHORT CIRCUIT (POWER STEERING ECU BRANCH WIRE) Disconnect the J15 J/C1 connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition P8-1 (CANH) - P8-7 (CANL) Power switch OFF 1 Mohms or more HINT: Measure the resistance with the P8 power steering ECU connector disconnected. NG : REPLACE POWER STEERING ECU BRANCH WIRE AND CONNECTOR (CANH, CANL) OK : GO TO NEXT STEP
11. CONNECT CONNECTOR Reconnect the P8 power steering ECU connector and J15 J/C1 connector. NEXT
12. CHECK CAN BUS LINES FOR SHORT CIRCUIT (STEERING ANGLE SENSOR) NOTE: For vehicles without enhanced VSC, go to "CHECK CAN BUS LINES FOR SHORT CIRCUIT (SKID CONTROL ECU)". Disconnect the S13 steering angle sensor connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-14 (CANL) Power switch OFF 54 to 69 ohms OK : REPLACE STEERING ANGLE SENSOR NG : GO TO NEXT STEP
13. CHECK CAN BUS LINES FOR SHORT CIRCUIT (STEERING ANGLE SENSOR BRANCH WIRE) Disconnect the J15 J/C1 connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition S13-10 (CANH) - S13-9 (CANL) Power switch OFF 1 Mohms or more HINT: Measure the resistance with the S13 steering angle sensor connector disconnected. NG : REPLACE STEERING ANGLE SENSOR BRANCH WIRE AND CONNECTOR (CANH, CANL) OK : GO TO NEXT STEP
14. CONNECT CONNECTOR Reconnect the S13 steering angle sensor connector and J15 J/C1 connector. NEXT
15. CHECK CAN BUS LINES FOR SHORT CIRCUIT (SKID CONTROL ECU) Disconnect the S8 skid control ECU connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-14 (CANL) Power switch OFF 54 to 69 ohms OK : REPLACE SKID CONTROL ECU NG : GO TO NEXT STEP
16. CHECK CAN BUS LINES FOR SHORT CIRCUIT (SKID CONTROL ECU BRANCH WIRE) Disconnect the J15 J/C1 connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition S8-19 (CANH) - S8-18 (CANL) Power switch OFF 1 Mohms or more HINT: Measure the resistance with the S8 skid control ECU connector disconnected. NG : REPLACE SKID CONTROL ECU BRANCH WIRE AND CONNECTOR OK : REPLACE JUNCTION CONNECTOR (J/C1)
17. CONNECT CONNECTOR Reconnect the J18 J/C2 connector. NEXT
18. CHECK CAN BUS LINES FOR SHORT CIRCUIT (ECM) Disconnect the E6 ECM connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-14 (CANL) Power switch OFF 108 to 132 ohms OK : REPLACE ECM NG : GO TO NEXT STEP
19. CHECK CAN BUS LINES FOR SHORT CIRCUIT (ECM - J/C2) Disconnect the J18 J/C2 connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition E6-31 (CANH) - E6-30 (CANL) Power switch OFF 1 Mohms or more HINT: Measure the resistance with the E6 ECM connector disconnected. NG : REPLACE CAN MAIN WIRE AND CONNECTOR (ECM - J/C2) OK : GO TO NEXT STEP
20. CONNECT CONNECTOR Reconnect the E6 ECM connector and J18 J/C2 connector. NEXT
21. CHECK CAN BUS LINES FOR SHORT CIRCUIT (YAW RATE SENSOR) NOTE: For vehicles without enhanced VSC, go to "CHECK CAN BUS LINES FOR SHORT CIRCUIT (HYBRID VEHICLE CONTROL ECU)". Disconnect the Y1 yaw rate sensor connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-14 (CANL) Power switch OFF 54 to 69 ohms OK : REPLACE YAW RATE SENSOR NG : GO TO NEXT STEP
22. CHECK CAN BUS LINES FOR SHORT CIRCUIT (YAW RATE SENSOR BRANCH WIRE) Disconnect the J18 J/C2 connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition Y1-3 (CANH) - Y1-2 (CANL) Power switch OFF 1 Mohms or more HINT: Measure the resistance with the Y1 yaw rate sensor connector disconnected. NG : REPLACE YAW RATE SENSOR BRANCH WIRE AND CONNECTOR (CANH, CANL) OK : GO TO NEXT STEP
23. CONNECT CONNECTOR Reconnect the Y1 yaw rate sensor connector and J18 J/ C2 connector. NEXT
24. CHECK CAN BUS LINES FOR SHORT CIRCUIT (HYBRID VEHICLE CONTROL ECU) Disconnect the H14 hybrid vehicle control ECU connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-14 (CANL) Power switch OFF 54 to 69 ohms OK : REPLACE HYBRID VEHICLE CONTROL ECU NG : GO TO NEXT STEP
25. CHECK CAN BUS LINES FOR SHORT CIRCUIT (HYBRID VEHICLE CONTROL ECU BRANCH WIRE) Disconnect the J18 J/C2 connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition H14-8 (CANH) - H14-9 (CANL) Power switch OFF 1 Mohms or more HINT: Measure the resistance with the H14 hybrid vehicle control ECU connector disconnected. NG : REPLACE HYBRID VEHICLE CONTROL ECU BRANCH WIRE AND CONNECTOR (CANH, CANL) OK : GO TO NEXT STEP
26. CONNECT CONNECTOR Reconnect the H14 hybrid vehicle control ECU connector and J18 J/C2 connector. NEXT
27. CHECK CAN BUS LINES FOR SHORT CIRCUIT (GATEWAY ECU) Disconnect the G1 gateway ECU connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-14 (CANL) Power switch OFF 54 to 69 ohms OK : REPLACE GATEWAY ECU NG : GO TO NEXT STEP
28. CHECK CAN BUS LINES FOR SHORT CIRCUIT (GATEWAY ECU BRANCH WIRE) Disconnect the J18 J/C2 connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition G1-17 (CA1H) - G1-18 (CA1L) Power switch OFF 1 Mohms or more HINT: Measure the resistance with the G1 gateway ECU connector disconnected. NG : REPLACE GATEWAY ECU BRANCH WIRE AND CONNECTOR (CA1H, CA1L) OK : REPLACE JUNCTION CONNECTOR (J/C2)

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

SYMPTOM - TROUBLE AREA

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1. CHECK CAN BUS LINE FOR SHORT TO +B (DLC3 BRANCH WIRE) Disconnect the J15 J/C1 connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-16 (BAT) Power switch OFF 1 Mohms or more D1-14 (CANL) - D1-16 (BAT) Power switch OFF 1 Mohms or more NG : REPLACE DLC3 BRANCH WIRE AND CONNECTOR (CANH, CANL) OK : GO TO NEXT STEP
2. CONNECT CONNECTOR Reconnect the J15 J/C1 connector. NEXT
3. CHECK CAN BUS LINE FOR SHORT TO +B (CAN BUSES TO J/C2) Disconnect the J18 J/C2 connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-16 (BAT) Power switch OFF 1 Mohms or more D1-14 (CANL) - D1-16 (BAT) Power switch OFF 1 Mohms or more OK : Go to step 16 NG : GO TO NEXT STEP
4. CONNECT CONNECTOR Reconnect the J18 J/C2 connector. NEXT
5. CHECK CAN BUS LINE FOR SHORT TO +B (BATTERY ECU) Disconnect the B11 battery ECU connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-16 (BAT) Power switch OFF 1 Mohms or more D1-14 (CANL) - D1-16 (BAT) Power switch OFF 1 Mohms or more OK : REPLACE BATTERY ECU NG : GO TO NEXT STEP
6. CHECK CAN BUS LINE FOR SHORT TO +B (BATTERY ECU - J/C1) Disconnect the J15 J/C1 connector. Measure the resistance of the wire harness side connectors. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition B11-18 (CANH) - D1-16 (BAT) Power switch OFF 1 Mohms or more B11-19 (CANL) - D1-16 (BAT) Power switch OFF 1 Mohms or more HINT: Measure the resistance with the B11 battery ECU connector disconnected. NG : REPLACE CAN MAIN WIRE AND CONNECTOR (BATTERY ECU - J/C1) OK : GO TO NEXT STEP
7. CONNECT CONNECTOR Reconnect the B11 battery ECU connector and J15 J/C1 connector. NEXT
8. CHECK CAN BUS LINE FOR SHORT TO +B (POWER STEERING ECU) Disconnect the P8 power steering ECU connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-16 (BAT) Power switch OFF 1 Mohms or more D1-14 (CANL) - D1-16 (BAT) Power switch OFF 1 Mohms or more OK : REPLACE POWER STEERING ECU NG : GO TO NEXT STEP
9. CHECK CAN BUS LINE FOR SHORT TO +B (POWER STEERING ECU BRANCH WIRE) Disconnect the J15 J/C1 connector. Measure the resistance of the wire harness side connectors. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition P8-1 (CANH) - P7-1 (PIG) Power switch OFF 1 Mohms or more P8-1 (CANL) - P7-1 (PIG) Power switch OFF 1 Mohms or more HINT: Measure the resistance with the P8 power steering ECU connector disconnected. NG : REPLACE POWER STEERING ECU BRANCH WIRE AND CONNECTOR (CANH, CANL) OK : GO TO NEXT STEP
10. CONNECT CONNECTOR Reconnect the P8 power steering ECU and J15 J/C1 connector. NEXT
11. CHECK CAN BUS LINE FOR SHORT TO +B (STEERING ANGLE SENSOR) NOTE: For vehicles without enhanced VSC, go to "CHECK CAN BUS LINE FOR SHORT TO +B (SKID CONTROL ECU)". Disconnect the S13 steering angle sensor connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-16 (BAT) Power switch OFF 1 Mohms or more D1-14 (CANL) - D1-16 (BAT) Power switch OFF 1 Mohms or more OK : REPLACE STEERING ANGLE SENSOR NG : GO TO NEXT STEP
12. CHECK CAN BUS LINE FOR SHORT TO +B (STEERING ANGLE SENSOR BRANCH WIRE) Disconnect the J15 J/C1 connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition S13-10 (CANH) - S13-3 (BAT) Power switch OFF 1 Mohms or more S13-9 (CANL) - S13-3 (BAT) Power switch OFF 1 Mohms or more HINT: Measure the resistance with the S13 steering angle sensor connector disconnected. NG : REPLACE STEERING ANGLE SENSOR BRANCH WIRE AND CONNECTOR (CANH, CANL) OK : GO TO NEXT STEP
13. CONNECT CONNECTOR Reconnect the S13 steering angle sensor connector and J15 J/C1 connector. NEXT
14. CHECK CAN BUS LINE FOR SHORT TO +B (SKID CONTROL ECU) Disconnect the A8 skid control ECU connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-16 (BAT) Power switch OFF 1 Mohms or more D1-14 (CANL) - D1-16 (BAT) Power switch OFF 1 Mohms or more OK : REPLACE SKID CONTROL ECU NG : GO TO NEXT STEP
15. CHECK CAN BUS LINE FOR SHORT TO +B (SKID CONTROL ECU BRANCH WIRE) Disconnect the J15 J/C1 connector. Measure the resistance of the wire harness side connectors. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition S8-19 (CANH) - S8-3 (+BI1) Power switch OFF 1 Mohms or more S8-19 (CANH) - S9-5 (+BI2) S8-18 (CANL) - S8-3 (+BI1) Power switch OFF 1 Mohms or more S8-18 (CANL) - S9-5 (+BI2) HINT: Measure the resistance with the S8 skid control ECU connector disconnected. NG : REPLACE SKID CONTROL ECU BRANCH WIRE AND CONNECTOR (CANH, CANL) OK : REPLACE CAN MAIN WIRE AND CONNECTOR (J/C1 - J/C2)
16. CONNECT CONNECTOR Reconnect the J18 J/C2 connector. NEXT
17. CHECK CAN BUS LINE FOR SHORT TO +B (ECM) Disconnect the E6 ECM connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-16 (BAT) Power switch OFF 1 Mohms or more D1-14 (CANL) - D1-16 (BAT) Power switch OFF 1 Mohms or more OK : REPLACE ECM NG : GO TO NEXT STEP
18. CHECK CAN BUS LINE FOR SHORT TO +B (ECM - J/C2) Disconnect the J18 J/C2 connector. Measure the resistance of the wire harness side connectors. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition E6-31 (CANH) - E7-6 (BATT) Power switch OFF 1 Mohms or more E6-30 (CANL) - E7-6 (BATT) Power switch OFF 1 Mohms or more HINT: Measure the resistance with the E6 ECM connector disconnected. NG : REPLACE CAN MAIN WIRE AND CONNECTOR (ECM - J/C2) OK : GO TO NEXT STEP
19. CONNECT CONNECTOR Reconnect the E6 ECM connector and J18 J/C2 connector. NEXT
20. CHECK CAN BUS LINE FOR SHORT TO +B (YAW RATE SENSOR) NOTE: For vehicles without enhanced VSC, go to "CHECK CAN BUS LINE FOR SHORT TO +B (HYBRID VEHICLE CONTROL ECU)". Disconnect the Y1 yaw rate sensor connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-16 (BAT) Power switch OFF 1 Mohms or more D1-14 (CANL) - D1-16 (BAT) Power switch OFF 1 Mohms or more OK : REPLACE YAW RATE SENSOR NG : GO TO NEXT STEP
21. CHECK CAN BUS LINE FOR SHORT TO +B (YAW RATE SENSOR BRANCH WIRE) Disconnect the J18 J/C2 connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition Y1-3 (CANH) - D1-16 (BAT) Power switch OFF 1 Mohms or more Y1-2 (CANL) - D1-16 (BAT) Power switch OFF 1 Mohms or more HINT: Measure the resistance with the Y1 yaw rate sensor connector disconnected. NG : REPLACE YAW RATE SENSOR BRANCH WIRE AND CONNECTOR OK : GO TO NEXT STEP
22. CONNECT CONNECTOR Reconnect the Y1 yaw rate sensor connector and J18 J/ C2 connector. NEXT
23. CHECK CAN BUS LINE FOR SHORT TO +B (HYBRID VEHICLE CONTROL ECU) Disconnect the H14 hybrid vehicle control ECU connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-16 (BAT) Power switch OFF 1 Mohms or more D1-14 (CANL) - D1-16 (BAT) Power switch OFF 1 Mohms or more OK : REPLACE HYBRID VEHICLE CONTROL ECU NG : GO TO NEXT STEP
24. CHECK CAN BUS LINE FOR SHORT TO +B (HYBRID VEHICLE CONTROL ECU BRANCH WIRE) Disconnect the J18 J/C2 connector. Measure the resistance of the wire harness side connectors. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition H14-8 (CANH) - H15-6 (BATT) Power switch OFF 1 Mohms or more H14-9 (CANL) - H15-6 (BATT) Power switch OFF 1 Mohms or more HINT: Measure the resistance with the H14 hybrid vehicle control ECU connector disconnected. NG : REPLACE HYBRID VEHICLE CONTROL ECU BRANCH WIRE AND CONNECTOR (CANH, CANL) OK : GO TO NEXT STEP
25. CONNECT CONNECTOR Reconnect the H14 hybrid vehicle control ECU connector and J18 J/C2 connector. NEXT
26. CHECK CAN BUS LINE FOR SHORT TO +B (GATEWAY ECU) Disconnect the G1 gateway ECU connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-16 (BAT) Power switch OFF 1 Mohms or more D1-14 (CANL) - D1-16 (BAT) Power switch OFF 1 Mohms or more OK : REPLACE GATEWAY ECU NG : REPLACE GATEWAY ECU BRANCH WIRE AND CONNECTOR

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

SYMPTOM TROUBLE AREA

Scheme 54

Scheme 55

Scheme 56

Scheme 57

Scheme 58

Scheme 59

Scheme 60

Scheme 61

Scheme 62

1. CHECK CAN BUS LINE FOR SHORT TO GND (DLC3 BRANCH WIRE) Disconnect the J15 J/C1 connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-4 (CG) Power switch OFF 1 Mohms or more D1-14 (CANL) - D1-4 (CG) Power switch OFF 1 Mohms or more NG : REPLACE DLC3 BRANCH WIRE AND CONNECTOR (CANH, CANL) OK : GO TO NEXT STEP
2. CONNECT CONNECTOR Reconnect the J15 J/C1 connector. NEXT
3. CHECK CAN BUS LINE FOR SHORT TO GND (CAN BUSES TO J/C2) Disconnect the J18 J/C2 connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-4 (CG) Power switch OFF 1 kohms or more D1-14 (CANL) - D1-4 (CG) Power switch OFF 1 kohms or more OK : Go to step 16 NG : GO TO NEXT STEP
4. CONNECT CONNECTOR Reconnect the J18 J/C2 connector. NEXT
5. CHECK CAN BUS LINE FOR SHORT TO GND (BATTERY ECU) Disconnect the B11 battery ECU connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-4 (CG) Power switch OFF 1 kohms or more D1-14 (CANL) - D1-4 (CG) Power switch OFF 1 kohms or more OK : REPLACE BATTERY ECU NG : GO TO NEXT STEP
6. CHECK CAN BUS LINE FOR SHORT TO GND (BATTERY ECU - J/C1) Disconnect the J15 J/C1 connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition B11-18 (CANH) - B11-12 (GND) Power switch OFF 1 Mohms or more B11-19 (CANL) - B11-12 (GND) Power switch OFF 1 Mohms or more HINT: Measure the resistance with the B11 battery ECU connector disconnected. NG : REPLACE CAN MAIN WIRE AND CONNECTOR (BATTERY ECU - J/C1) OK : GO TO NEXT STEP
7. CONNECT CONNECTOR Reconnect the B11 battery ECU connector and J15 J/C1 connector. NEXT
8. CHECK CAN BUS LINE FOR SHORT TO GND (POWER STEERING ECU) Disconnect the P8 power steering ECU connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-4 (CG) Power switch OFF 1 kohms or more D1-14 (CANL) - D1-4 (CG) Power switch OFF 1 kohms or more OK : REPLACE POWER STEERING ECU NG : GO TO NEXT STEP
9. CHECK CAN BUS LINE FOR SHORT TO GND (POWER STEERING ECU BRANCH WIRE) Disconnect the J15 J/C1 connector. Measure the resistance of the wire harness side connectors. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition P8-1 (CANH) - P7-2 (PGND) Power switch OFF 1 Mohms or more P8-7 (CANL) - P7-2 (PGND) Power switch OFF 1 Mohms or more HINT: Measure the resistance with the P8 power steering ECU connector disconnected. NG : REPLACE POWER STEERING ECU BRANCH WIRE AND CONNECTOR (CANH, CANL) OK : GO TO NEXT STEP
10. CONNECT CONNECTOR Reconnect the P8 power steering ECU connector and J15 J/C1 connector. NEXT
11. CHECK CAN BUS LINE FOR SHORT TO GND (STEERING ANGLE SENSOR) NOTE: For vehicles without enhanced VSC, go to "CHECK CAN BUS LINE FOR SHORT TO GND (SKID CONTROL ECU)". Disconnect the S13 steering angle sensor connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-4 (CG) Power switch OFF 1 kohms or more D1-14 (CANL) - D1-4 (CG) Power switch OFF 1 kohms or more OK : REPLACE STEERING ANGLE SENSOR NG : GO TO NEXT STEP
12. CHECK CAN BUS LINE FOR SHORT TO GND (STEERING ANGLE SENSOR BRANCH WIRE) Disconnect the J15 J/C1 connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition S13-10 (CANH) - S13-2 (ESS) Power switch OFF 1 Mohms or more S13-9 (CANL) - S13-2 (ESS) Power switch OFF 1 Mohms or more HINT: Measure the resistance with the S13 steering angle sensor connector disconnected. NG : REPLACE STEERING ANGLE SENSOR BRANCH WIRE AND CONNECTOR (CANH, CANL) OK : GO TO NEXT STEP
13. CONNECT CONNECTOR Reconnect the S13 steering angle sensor connector and J15 J/C1 connector. NEXT
14. CHECK CAN BUS LINE FOR SHORT TO GND (SKID CONTROL ECU) Disconnect the S8 skid control ECU connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-4 (CG) Power switch OFF 1 kohms or more D1-14 (CANL) - D1-4 (CG) Power switch OFF 1 kohms or more OK : REPLACE SKID CONTROL ECU NG : GO TO NEXT STEP
15. CHECK CAN BUS LINE FOR SHORT TO GND (SKID CONTROL ECU BRANCH WIRE) Disconnect the J15 J/C1 connector. Measure the resistance of the wire harness side connectors. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition S8-19 (CANH) - S7-1 (GND) Power switch OFF 1 Mohms or more S8-19 (CANH) - S8-2 (GND2) S8-19 (CANH) - S8-1 (GND3) S8-19 (CANH) - S9-2 (GND4) S8-19 (CANH) - S9-1 (GND5) S8-19 (CANH) - S10-4 (GND6) S8-18 (CANL) - S7-1 (GND) Power switch OFF 1 Mohms or more S8-18 (CANL) - S8-2 (GND2) S8-18 (CANL) - S8-1 (GND3) S8-18 (CANL) - S9-2 (GND4) S8-18 (CANL) - S9-1 (GND5) S8-18 (CANL) - S10-4 (GND6) HINT: Measure the resistance with the S8 skid control ECU connector disconnected. NG : REPLACE SKID CONTROL ECU BRANCH WIRE AND CONNECTOR (CANH, CANL) OK : REPLACE CAN MAIN WIRE AND CONNECTOR (J/C1 - J/C2)
16. CONNECT CONNECTOR Reconnect the J18 J/C2 connector. NEXT
17. CHECK CAN BUS LINE FOR SHORT TO GND (ECM) Disconnect the E6 ECM connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-4 (CG) Power switch OFF 1 kohms or more D1-14 (CANL) - D1-4 (CG) Power switch OFF 1 kohms or more OK : REPLACE ECM NG : GO TO NEXT STEP
18. CHECK CAN BUS LINE FOR SHORT TO GND (ECM - J/C2) Disconnect the J18 J/C2 connector. Measure the resistance of the wire harness side connectors. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition E6-31 (CANH) - E4-7 (E01) Power switch OFF 1 Mohms or more E6-31 (CANH) - E4-6 (E02) E6-31 (CANH) - E6-7 (E03) E6-31 (CANH) - E4-1 (E04) E6-31 (CANH) - E5-3 (ME01) E6-30 (CANL) - E4-7 (E01) Power switch OFF 1 Mohms or more E6-30 (CANL) - E4-6 (E02) E6-30 (CANL) - E6-7 (E03) E6-30 (CANL) - E4-1 (E04) E6-30 (CANL) - E5-3 (ME01) HINT: Measure the resistance with the E6 ECM connector disconnected. NG : REPLACE CAN MAIN WIRE AND CONNECTOR (ECM - J/C2) OK : GO TO NEXT STEP
19. CONNECT CONNECTOR Reconnect the E6 ECM connector and J18 J/C2 connector. NEXT
20. CHECK CAN BUS LINE FOR SHORT TO GND (YAW RATE SENSOR) NOTE: For vehicles without enhanced VSC, go to "CHECK CAN BUS LINE FOR SHORT TO GND (HYBRID VEHICLE CONTROL ECU)". Disconnect the Y1 yaw rate sensor connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-4 (CG) Power switch OFF 1 kohms or more D1-14 (CANL) - D1-4 (CG) Power switch OFF 1 kohms or more OK : REPLACE YAW RATE SENSOR NG : GO TO NEXT STEP
21. CHECK CAN BUS LINE FOR SHORT TO GND (YAW RATE SENSOR BRANCH WIRE) Disconnect the J18 J/C2 connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition Y1-3 (CANH) - Y1-1 (GND) Power switch OFF 1 Mohms or more Y1-2 (CANL) - Y1-1 (GND) Power switch OFF 1 Mohms or more HINT: Measure the resistance with the Y1 yaw rate sensor connector disconnected. NG : REPLACE YAW RATE SENSOR BRANCH WIRE AND CONNECTOR (CANH, CANL) OK : GO TO NEXT STEP
22. CONNECT CONNECTOR Reconnect the Y1 yaw rate sensor connector and J18 J/ C2 connector. NEXT
23. CHECK CAN BUS LINE FOR SHORT TO GND (HYBRID VEHICLE CONTROL ECU) Disconnect the H14 hybrid vehicle control ECU connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-4 (CG) Power switch OFF 1 kohms or more D11-14 (CANL) - D1-4 (CG) Power switch OFF 1 kohms or more OK : REPLACE HYBRID VEHICLE CONTROL ECU NG : GO TO NEXT STEP
24. CHECK CAN BUS LINE FOR SHORT TO GND (HYBRID VEHICLE CONTROL ECU BRANCH WIRE) Disconnect the J18 J/C2 connector. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition H14-8 (CANH) - H14-1 (GND1) Power switch OFF 1 Mohms or more H14-8 (CANH) - H14-4 (GND2) 14-9 (CANL) - H14-1 (GND1) Power switch OFF 1 Mohms or more 14-9 (CANL) - H14-4 (GND2) HINT: Measure the resistance with the H14 hybrid vehicle control ECU connector disconnected. NG : REPLACE HYBRID VEHICLE CONTROL ECU BRANCH WIRE AND CONNECTOR (CANH, CANL) OK : GO TO NEXT STEP
25. CONNECT CONNECTOR Reconnect the H14 hybrid vehicle control ECU connector and J18 J/C2 connector. NEXT
26. CHECK CAN BUS LINE FOR SHORT TO GND (GATEWAY ECU) Disconnect the G1 gateway ECU connector. Measure the resistance of the DLC3. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition D1-6 (CANH) - D1-4 (CG) Power switch OFF 1 kohms or more D1-14 (CANL) - D1-4 (CG) Power switch OFF 1 kohms or more OK : REPLACE GATEWAY ECU NG : REPLACE GATEWAY ECU BRANCH WIRE AND CONNECTOR (CA1H, CA1L)

See also:
• DIAGNOSTIC TROUBLE CODE CHART