CAN Communication (Diagnostics - Introduction): Other Lexus GS III facelift

TERMINALS OF ECU

Note. This section describes the standard CAN values for all CAN related components.

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1. JUNCTION CONNECTOR The terminals on connectors for the CAN J/C. Terminal Terminal symbol 1 CANH 2 CANL D-CAN J/C. WIRING COLOR D-CAN J/C connectors (A side, w/ earth terminal) Color (CAN-H Side) Color (CAN-L Side) DLC3 L LG ECM BR GR CAN main bus line (P-CAN J/C) GR BR Skid Control ECU (for 1UR-FSE) B W WIRING COLOR D-CAN J/C connectors (B side, w/o earth terminal) Color (CAN-H Side) Color (CAN-L Side) Steering angle sensor W R Seat belt control ECU L W Yaw Rate Sensor BR Y CAN main bus line (RR1-CAN J/C) GR BR Distance control ECU B W HINT: 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. The connectors can be connected to any terminals on the same side. P-CAN J/C. WIRING COLOR P-CAN J/C A Side (w/ Earth Terminal) Color (CAN-H Side) Color (CAN-L Side) Clearance warning ECU (for 2GR-FSE) B W Skid control ECU (for 2GR-FSE) BR Y Steering control ECU (for 1UR-FSE) BR Y RR3-CAN J/C (for 4WD) GR BR WIRING COLOR P-CAN J/C B Side (w/o Earth Terminal) Color (CAN-H Side) Color (CAN-L Side) Absorber control ECU W R Network gateway ECU L W Power steering ECU BR Y CAN bus line (D-CAN J/C) GR BR HINT: 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. The connectors can be connected to any terminals on the same side. C-CAN J/C (for 1UR-FSE) WIRING COLOR C-CAN J/C connectors (B side w/o earth terminal) Color (CAN-H Side) Color (CAN-L Side) CAN main bus line (RR2-CAN J/C) BR GR Front active stabilizer control ECU W B Clearance warning ECU L Y HINT: 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. The connectors can be connected to any terminals on the same side. RR1-CAN J/C (for 1UR-FSE) WIRING COLOR P-CAN J/C A side (w/ earth terminal) Color (CAN-H Side) Color (CAN-L Side) Gateway CAN ECU P O CAN main bus line (D-CAN J/C) L LG HINT: 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. The connectors can be connected to any terminals on the same side. RR2-CAN J/C (for 1UR-FSE) Junction Connector Wiring Color Connect to V38-1 (CANH) BR C-CAN J/C V38-4 (CANL) Y C-CAN J/C V38-3 (CA2H) V Gateway CAN ECU V38-6 (CA2L) P Gateway CAN ECU V38-2 (CANH) R Rear active stabilizer control ECU V38-5 (CANL) W Rear active stabilizer control ECU RR3-CAN J/C (for 4WD) WIRING COLOR P-CAN J/C A side (w/ earth terminal) Color (CAN-H Side) Color (CAN-L Side) 4WD ECU W B CAN sub bus line (P-CAN J/C) L W HINT: 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. The connectors can be connected to any terminals on the same side. Wiring diagram for identifying CAN J/C connectors.
2. DLC3 Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Terminals Wiring Color Condition Specified Condition K16-6 (CANH) - K16-14 (CANL) L - LG Engine switch off 54 to 69 ohms K16-6 (CANH) - K16-4 (CG) L - W-B Engine switch off 200 ohms or more K16-14 (CANL) - K16-4 (CG) BR - W-B Engine switch off 200 ohms or more K16-6 (CANH) - K16-16 (BAT) GR - O Disconnect negative battery terminal 6 kohms or more K16-14 (CANL) - K16-16 (BAT) BR - O Disconnect negative battery terminal 6 kohms or more
3. SKID CONTROL ECU (for 1UR-FSE) Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Terminals Wiring Color Condition Specified Condition A15-9 (CANH) - A15-22 (CANL) B - W Engine switch off 54 to 69 ohms A15-9 (CANH) - A15-1 (GND4) B - W-B Engine switch off 200 ohms or more A15-22 (CANL) - A15-1 (GND4) W - W-B Engine switch off 200 ohms or more A15-9 (CANH) - A15-2 (BS2) B - R-W Disconnect negative battery terminal 6 kohms or more A15-22 (CANL) - A15-2 (BS2) W - R-W Disconnect negative battery terminal 6 kohms or more
4. SKID CONTROL ECU (for 2GR-FSE) Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Terminals Wiring Color Condition Specified Condition K93-8 (CANH) - K93-16 (CANL) B - W Engine switch off 54 to 69 ohms K93-8 (CANH) - A57-26 (GND1) B - W-B Engine switch off 200 ohms or more K93-25 (CANL) - A57-26 (GND1) W - W-B Engine switch off 200 ohms or more K93-8 (CANH) - K16-16 (BAT) B - O Disconnect negative battery terminal 6 kohms or more K93-16 (CANL)- K16-16 (BAT) W - O Disconnect negative battery terminal 6 kohms or more
5. STEERING ANGLE SENSOR Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Terminals Wiring Color (Electronically Controlled Brake System) Condition Specified Condition K19-10 (CANH) - K19-9 (CANL) W - R Engine switch off 54 to 69 ohms K19-10 (CANH) - K19-2 (ESS) W - W-B Engine switch off 200 ohms or more K19-9 (CANL) - K19-2 (ESS) R - W-B Engine switch off 200 ohms or more K19-10 (CANH) - K19-3 (BAT) W - LG Disconnect negative battery terminal 6 kohms or more K19-9 (CANL) - K19-3 (BAT) R - LG Disconnect negative battery terminal 6 kohms or more
6. YAW RATE SENSOR Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Terminals Wiring Color Condition Specified Condition K35-3 (CANH) - K35-2 (CANL) BR - Y Engine switch off 54 to 69 ohms K35-3 (CANH) - K35-1 (GND) BR - W-B Engine switch off 200 ohms or more K35-2 (CANL) - K35-1 (GND) Y - W-B Engine switch off 200 ohms or more K35-3 (CANH) - K16-16 (BAT) BR - O Disconnect negative battery terminal 6 kohms or more K35-2 (CANL) - K16-16 (BAT) Y - O Disconnect negative battery terminal 6 kohms or more
7. DISTANCE CONTROL ECU (w/ Dynamic radar cruise control system) Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Terminals Wiring Color Condition Specified Condition K13-8 (CANH) - K13-9 (CANL) B - W Engine switch off 54 to 69 ohms K13-8 (CANH) - K13-12 (GND) B - G Engine switch off 200 ohms or more K13-9 (CANL) - K13-12 (GND) W - G Engine switch off 200 ohms or more K13-8 (CANH) - K16-16 (BAT) B - O Disconnect negative battery terminal 6 kohms or more K13-9 (CANL) - K16-16 (BAT) W - O Disconnect negative battery terminal 6 kohms or more
8. ECM (for 2GR-FSE) Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Terminals Wiring Color Condition Specified Condition A6-25 (CANH) - A6-24 (CANL) B - W Engine switch off 54 to 69 ohms A6-25 (CANH) - A6-2 (EC) B - W-B Engine switch off 200 ohms or more A6-24 (CANL) - A6-2 (EC) W - W-B Engine switch off 200 ohms or more A6-25 (CANH) - A6-4 (BATT) B - L Disconnect negative battery terminal 6 kohms or more A6-24 (CANL) - A6-4 (BATT) W - L Disconnect negative battery terminal 6 kohms or more
9. ECM (for 1UR-FSE) Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Terminals Wiring Color Condition Specified Condition A7-14 (CANH) - A7-13 (CANL) B - W Engine switch off 54 to 69 ohms A7-14 (CANH) - E86-12 (E1) B - W-B Engine switch off 200 ohms or more A7-13 (CANL) - E86-12 (E1) W - W-B Engine switch off 200 ohms or more A7-14 (CANH) - A6-7 (BATT) B - L Disconnect negative battery terminal 6 kohms or more A7-13 (CANL) - A6-7 (BATT) W - L Disconnect negative battery terminal 6 kohms or more
10. SEAT BELT CONTROL ECU (w/ Pre-collision system) Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Terminals Wiring Color Condition Specified Condition V43-1 (CANH) - V43-2 (CANL) B - W Engine switch off 54 to 69 ohms V43-1 (CANH) - V31-8 (PGND) B - W-B Engine switch off 200 ohms or more V43-2 (CANL) - V31-8 (PGND) W - W-B Engine switch off 200 ohms or more V43-1 (CANH) - V31-7 (+B) B - L Disconnect negative battery terminal 6 kohms or more V43-2 (CANL) - V31-7 (+B) W - L Disconnect negative battery terminal 6 kohms or more
11. POWER STEERING ECU Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Terminals Wiring Color Condition Specified Condition A23-2 (CANH) - A23-3 (CANL) B - W Engine switch off 54 to 69 ohms A23-2 (CANH) - A23-5 (PGND) B - B Engine switch off 200 ohms or more A23-3 (CANL) - A23-5 (PGND) W - B Engine switch off 200 ohms or more A23-2 (CANH) - A23-9 (IG) B - B-Y Disconnect negative battery terminal 6 kohms or more A23-3 (CANL) - A23-9 (IG) W - B-Y Disconnect negative battery terminal 6 kohms or more
12. STEERING CONTROL ECU (for 1UR-FSE) Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Terminals Wiring Color Condition Specified Condition K70-9 (CANH) - K70-20 (CANL) BR - Y Engine switch off 54 to 69 ohms K70-9 (CANH) - A40-7 (PGND) BR - W-B Engine switch off 200 ohms or more K70-20 (CANL) - A40-7 (PGND) Y - W-B Engine switch off 200 ohms or more K70-9 (CANH) - A40-3 (IG) BR - B-Y Disconnect negative battery terminal 6 kohms or more K70-20 (CANL) - A40-3 (IG) Y - B-Y Disconnect negative battery terminal 6 kohms or more
13. CLEARANCE WARNING ECU (w/ Intuitive parking assist system) Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Terminals Wiring Color Condition Specified Condition A38-23 (R1) - A38-24 (R2) B - W Engine switch off 54 to 69 ohms A38-23 (R1) - A38-27 (E) B - W-B Engine switch off 200 ohms or more A38-24 (R2) - A38-27 (E) W - W-B Engine switch off 200 ohms or more A38-23 (R1) - A38-8 (IG) B - G-Y Disconnect negative battery terminal 6 kohms or more A38-24 (R2) - A38-8 (IG) W - G-Y Disconnect negative battery terminal 6 kohms or more
14. NETWORK GATEWAY ECU Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Terminals Wiring Color Condition Specified Condition K66-17 (CA1H) - K66-18 (CA1L) L - W Engine switch off 54 to 69 ohms K66-17 (CA1H) - K66-24 (GND) L - W-B Engine switch off 200 ohms or more K66-18 (CA1L) - K66-24 (GND) W - W-B Engine switch off 200 ohms or more K66-17 (CA1H) - K66-10 (BATT) L- G Disconnect negative battery terminal 6 kohms or more K66-18 (CA1L) - K66-10 (BATT) W - G Disconnect negative battery terminal 6 kohms or more
15. ABSORBER CONTROL ECU (for 1UR-FSE or 2GR-FSE, w/ Adaptive variable suspension system) Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Terminals Wiring Color Condition Specified Condition K72-7 (CANH) - K72-8 (CANL) W - R Engine switch off 54 to 69 ohms K72-7 (CANH) - K72-4 (GND) W - W-B Engine switch off 200 ohms or more K72-8 (CANL) - K72-4 (GND) R - W-B Engine switch off 200 ohms or more K72-7 (CANH) - K16-16 (BAT) W - O Disconnect negative battery terminal 6 kohms or more K72-8 (CANL) - K16-16 (BAT) R - O Disconnect negative battery terminal 6 kohms or more
16. 4WD ECU (for 4WD) Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Terminals Wiring Color Condition Specified Condition U52-1 (CANH) - U52-14 (CANL) W - B Engine switch off 54 to 69 ohms U52-1 (CANH) - U52-30 (GND) W - W-B Engine switch off 200 ohms or more U52-14 (CANL) - U52-30 (GND) B - W-B Engine switch off 200 ohms or more U52-1 (CANH) - U52-9 (IG1) W - B Disconnect negative battery terminal 6 kohms or more U52-14 (CANL) - U52-9 (IG1) B - B Disconnect negative battery terminal 6 kohms or more
17. GATEWAY CAN ECU (for 1UR-FSE, w/ Active stabilizer suspension system or w/ Intuitive parking assist system) Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Terminals Wiring Color Condition Specified Condition V39-16 (CA1H) - V39-15 (CA1L) P - O Engine switch off 54 to 69 ohms V39-16 (CA1H) - V39-4 (GND) P - W-B Engine switch off 200 ohms or more V39-15 (CA1L) - V39-4 (GND) O - W-B Engine switch off 200 ohms or more V39-16 (CA1H) - V39-2 (BATT) P - G Disconnect negative battery terminal 6 kohms or more V39-15 (CA1L) - V39-2 (BATT) O - G Disconnect negative battery terminal 6 kohms or more V39-13 (CA2H) - V39-12 (CA2L) P - V Engine switch off 108 to 132ohms V39-13 (CA2H) - V39-4 (GND) P - W-B Engine switch off 200 ohms or more V39-12 (CA2L) - V39-4 (GND) V - W-B Engine switch off 200 ohms or more V39-13 (CA2H) - V39-2 (BATT) P - G Disconnect negative battery terminal 6 kohms or more V39-12 (CA2L) - V39-2 (BATT) V - G Disconnect negative battery terminal 6 kohms or more
18. FRONT ACTIVE STABILIZER CONTROL ECU (for 1UR-FSE, w/ Active Stabilizer Suspension System) Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Terminals Wiring Color Condition Specified Condition A49-2 (CANH) - A49-3 (CANL) B - W Engine switch off 54 to 69 ohms A49-2 (CANH) - A49-5 (PGND) B - B Engine switch off 200 ohms or more A49-3 (CANL) - A49-5 (PGND) W - B Engine switch off 200 ohms or more A49-2 (CANH) - K16-16 (BAT) B - O Disconnect negative battery terminal 6 kohms or more A49-3 (CANL) - K16-16 (BAT) W - O Disconnect negative battery terminal 6 kohms or more
19. REAR ACTIVE STABILIZER CONTROL ECU (for 1UR-FSE, w/ Active Stabilizer Suspension System) Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Terminals Wiring Color Condition Specified Condition e1-2 (CANH) - e1-3 (CANL) B - W Engine switch off 54 to 69 ohms e1-2 (CANH) - e1-5 (PGND) B - W Engine switch off 200 ohms or more e1-3 (CANL) - e1-5 (PGND) W - W Engine switch off 200 ohms or more e1-2 (CANH) - K16-16 (BAT) B - O Disconnect negative battery terminal 6 kohms or more e1-3 (CANL) - K16-16 (BAT) W - O Disconnect negative battery terminal 6 kohms or more

FAIL-SAFE CHART

1. FAIL-SAFE FUNCTION When communication fails in any of the CAN bus lines (communication line) due to a short circuit or other causes, the fail-safe function, which is specified for each system, operates to prevent the system from malfunctioning. Effects on each system when communication is impossible. (For further details, see the pages for each system.) Function ECM Skid Control ECU Steering Control ECU Yaw Rate Sensor Distance Control ECU Condition when communication is impossible DTC detection (Driver detectable) VSC Control (Controls driving force while VSC is in operation) o • o o - VSC function stops Detectable (Light comes on) VDM-β control (steering cooperative control) - • o o - VDM-β function stops Can be recognized with abnormal lighting of the light Dynamic Radar Cruise (Maintains vehicle-to- vehicle distance) o o - - • Vehicle-to- Vehicle distance control does not operate Detectable (Light comes on) Pre-collision* AVS control (increases the damping force of the air suspension when the PCS is activated) - - - - o Control is inoperative None Back Monitor (Exterior view from rear of vehicle is displayed while reversing) - - o - - Back monitor only (function stops) Detectable (recognized when vehicle direction is not displayed Pre-collision (requests braking and seat belt tightening when a vehicle crash is detected) - o - - o Pre-collision is inoperative Detectable (Light comes on) Absorber Control (Controls suspension properly based on vehicle conditions) o o - - - Control stops Detectable (absorber control does not display) Electric power steering (outputs the assist current) o o o - - Control continues with assist force of a vehicle speed of 43.5 mile/h (69.6 km/h) or equivalent Detectable (Light comes on) Controls torque distribution to the front and rear wheels o o o - - Fixed torque distribution. Front 3: Rear 7 Can be recognized with abnormal lighting of the light Meter Display (Displays operation condition and DTCs) o o - - o light does not come on or remains on Can be recognized with abnormal lighting of the light Obstacle position detection (determines the level of contact avoidance based on steering wheel operation) - - o - - Informs the driver of an obstacle in the detection ranges The steering wheel assist mark on the clearance sonar indication blinks Back monitor detection (there is no back sonar if the vehicle is equipped with the back monitor) - - - - - Recognizes the presence of the back sonar by mistake and informs the driver The back sonar mark on the clearance sonar indicator blinks VGRS control (controls the ratio of the steering gear based on the vehicle speed) o - o - - VGRS function stops Can be recognized with abnormal lighting of the light Function Seat belt control ECU Absorber control ECU Network gateway ECU Power steering ECU 4WD ECU Clearance warning ECU Steering control ECU Condition when communication is impossible DTC detection (Driver detectable) VSC Control (Controls driving force while VSC is in operation) - - - - - - - VSC function stops Detectable (Light comes on) VDM-β control (steering cooperative control) - - - o - - o VDM-β function stops Can be recognized with abnormal lighting of the light Dynamic Laser Cruise (Maintains vehicle-to- vehicle distance) - - - - - - - Vehicle-to- Vehicle distance control does not operate Detectable (Light comes on) Pre-collision* AVS control (increases the damping force of the air suspension when the PCS is activated) - - - - - - - Control is inoperative None Back Monitor (Exterior view from rear of vehicle is displayed while reversing) - • - - - - - Back monitor only (function stops) Detectable (recognized when vehicle direction is not displayed Pre-collision (requests braking and seat belt tightening when a vehicle crash is detected) • - - - - - - Pre-collision is inoperative Detectable (Light comes on) Absorber Control (Controls suspension properly based on vehicle conditions) - • - - - - - Control stops Detectable (absorber control does not display) Electric power steering (outputs the assist current) - - - • - - - Control continues with assist force of a vehicle speed of 43.5 mile/h (69.6 km/h) or equivalent Detectable (Light comes on) Controls torque distribution to the front and rear wheels - - - - • - - Fixed torque distribution. Front 3: Rear 7 Can be recognized with abnormal lighting of the light Meter Display (Displays operation condition and DTCs) o o • o o - o Light does not come on or remains on Can be recognized with abnormal lighting of the light Obstacle position detection (determines the level of contact avoidance based on steering wheel operation) - - - - - • o Informs the driver of an obstacle in the detection ranges The steering wheel assist mark on the clearance sonar indication blinks Back monitor detection (there is no back sonar if the vehicle is equipped with the back monitor) - - - - - • - Recognizes the presence of the back sonar by mistake and informs the driver The back sonar mark on the clearance sonar indicator blinks VGRS control (controls the ratio of the steering gear based on the vehicle speed) - - - o - - • VGRS function stops Can be recognized with abnormal lighting of the light HINT: •: Control master o: System related