Home ReviewsRefund Car not listed?
Home/Lexus/ES/Lexus ES XV60 (2012-2015)/Repair manual/Communication Devices/CAN Communication System (Diagnostic Codes & Symptom Tests)…
Contents Wiring diagrams Section: Communication Devices All sections

CAN Communication System (Diagnostic Codes & Symptom Tests): Other Lexus ES XV60

Communication Devices ~5597 words

PROCEDURE

  1. RECONFIRM DTC OUTPUT Reconfirm DTCs. HINT: If DTC U1002 is output from Main Body of the main body ECU (multiplex network body ECU), this indicates a sub bus 1 malfunction. Troubleshoot for DTC U1002 and check for malfunctions in the sub bus 1. Result Result Proceed to U1002 is not output from main body ECU (multiplex network body ECU) (Techstream display: Main Body) A U1002 is output from main body ECU (multiplex network body ECU) (Techstream display: Main Body) B B --> See step 5 A: Go to next step
  2. CHECK FOR OPEN IN SUB BUS 1 LINES (OUTER MIRROR CONTROL ECU ASSEMBLY BRANCH LINE) (FOR FRONT PASSENGER SIDE) Disconnect the cable from the negative (-) battery terminal. Disconnect the L10 outer mirror control ECU assembly (for front passenger side) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L10-9 (CANP) - L10-8 (CANN) Cable disconnected from negative (-) battery terminal 54 to 69 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Outer Mirror Control ECU Assembly (for Front Passenger Side)) NG --> REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (OUTER MIRROR CONTROL ECU ASSEMBLY (FOR FRONT PASSENGER SIDE)) OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L10-7 (GND) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Outer Mirror Control ECU Assembly (for Front Passenger Side)) Reconnect the cable to the negative (-) battery terminal. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition L10-6 (CPUB) - Body ground Engine switch off 11 to 14 V L10-5 (SIG) - Body ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Outer Mirror Control ECU Assembly (for Front Passenger Side)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) OK --> See step 4
  4. REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (FOR FRONT PASSENGER SIDE). Refer to «REMOVAL [06/2012 - ]»(ref-598689-S42194488572014021400000)
  5. GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC. Refer to «DTC U1002: Lost Communication with Gateway Module (Main Body ECU)»(ref-598694-S08578728732014021400000)
  1. RECONFIRM DTC OUTPUT Reconfirm DTCs. HINT: If DTC U1002 is output from Main Body of the main body ECU (multiplex network body ECU), this indicates a sub bus 1 malfunction. Troubleshoot for DTC U1002 and check for malfunctions in the sub bus 1. Result Result Proceed to U1002 is not output from main body ECU (multiplex network body ECU) (Techstream display: Main Body) A U1002 is output from main body ECU (multiplex network body ECU) (Techstream display: Main Body) B B --> See step 5 A: Go to next step
  2. CHECK FOR OPEN IN SUB BUS 1 LINES (OUTER MIRROR CONTROL ECU ASSEMBLY BRANCH LINE) (FOR DRIVER SIDE) Disconnect the cable from the negative (-) battery terminal. Disconnect the M9 outer mirror control ECU assembly (for driver side) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition M9-9 (CANP) - M9-8 (CANN) Cable disconnected from negative (-) battery terminal 54 to 69 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Outer Mirror Control ECU Assembly (for Driver Side)) NG --> REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (OUTER MIRROR CONTROL ECU ASSEMBLY (FOR DRIVER SIDE)) OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition M9-7 (GND) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Outer Mirror Control ECU Assembly (for Driver Side)) Reconnect the cable to the negative (-) battery terminal. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition M9-6 (CPUB) - Body ground Engine switch off 11 to 14 V M9-5 (SIG) - Body ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Outer Mirror Control ECU Assembly (for Driver Side)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) OK --> See step 4
  4. REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (FOR DRIVER SIDE). Refer to «REMOVAL [06/2012 - ]»(ref-598689-S42194488572014021400000)
  5. GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC. Refer to «DTC U1002: Lost Communication with Gateway Module (Main Body ECU)»(ref-598694-S08578728732014021400000)
  1. RECONFIRM DTC OUTPUT Reconfirm DTCs. HINT: If DTC U1002 is output from Main Body of the main body ECU (multiplex network body ECU), this indicates a sub bus 1 malfunction. Troubleshoot for DTC U1002 and check for malfunctions in the sub bus 1. Result Result Proceed to U1002 is not output from main body ECU (multiplex network body ECU) (Techstream display: Main Body) A U1002 is output from main body ECU (multiplex network body ECU) (Techstream display: Main Body) B B --> See step 4 A: Go to next step
  2. CHECK FOR OPEN IN SUB BUS 1 LINES (FRONT POWER SEAT SWITCH RH BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the W10 front power seat switch RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition W10-8 (CANP) - W10-7 (CANN) Cable disconnected from negative (-) battery terminal 54 to 69 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Front Power Seat Switch RH) NG --> REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (FRONT POWER SEAT SWITCH RH) OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Disconnect the W9 front power seat switch RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition W9-2 (GND) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms Reconnect the cable to the negative (-) battery terminal. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition W9-7 (+B) - Body ground Engine switch off 11 to 14 V W10-12 (SYSB) - Body ground Engine switch off 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Front Power Seat Switch RH) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) OK --> See step 5
  4. GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC. Refer to «DTC U1002: Lost Communication with Gateway Module (Main Body ECU)»(ref-598694-S08578728732014021400000)
  5. REPLACE FRONT POWER SEAT SWITCH RH. Refer to «REMOVAL [06/2012 - ]»(ref-598666-S13484925092014021400000)
  1. RECONFIRM DTC OUTPUT Reconfirm DTCs. HINT: If DTC U1002 is output from Pre-Collision 2 of the driving support ECU assembly, this indicates a sub bus 13 malfunction. Troubleshoot for DTC U1002 and check for malfunctions in sub bus 13. Result Result Proceed to U1002 is not output from driving support ECU assembly (Techstream display: Pre-Collision 2) A U1002 is output from driving support ECU assembly (Techstream display: Pre-Collision 2) B B --> See step 4 A: Go to next step
  2. CHECK OPEN IN SUB BUS 13 LINES (MILLIMETER WAVE RADAR SENSOR ASSEMBLY MAIN LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the A55 millimeter wave radar sensor assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A55-4 (CA1P) - A55-3 (CA1N) Cable disconnected from negative (-) battery terminal 108 to 132 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Millimeter Wave Radar Sensor Assembly) NG --> REPAIR OR REPLACE CAN MAIN LINE OR CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY) OK: Go to next step
  3. CHECK MILLIMETER WAVE RADAR SENSOR ASSEMBLY POWER SOURCE CIRCUIT Check the millimeter wave radar sensor assembly power source circuit. Refer to «Millimeter Wave Radar Sensor Power Source Circuit»(ref-598638-S41836635272014021400000) . NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) OK --> See step 5
  4. GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC. Refer to «DTC U1002: Lost Communication with Gateway Module (Sensor Bus)»(ref-598694-S36025584572014021400000)
  5. REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY. Refer to «REMOVAL [06/2012 - ]»(ref-598474-S19115265312014021400000)
  1. CHECK VEHICLE TYPE Check vehicle type. Result Result Proceed to w/o Pre-collision control system A w/ Pre-collision system B B --> See step 3 A: Go to next step
  2. RECONFIRM DTC OUTPUT Reconfirm DTCs. HINT: If DTC U1002 is output from Gateway of the network gateway ECU, this indicates a sub bus 2 malfunction. Troubleshoot for DTC U1002 and check for malfunctions in sub bus 2. Result Result Proceed to U1002 is not output from network gateway ECU (Techstream display: Gateway) A U1002 is output from network gateway ECU (Techstream display: Gateway) B B --> See step 6 A: Go to next step
  3. CHECK FOR OPEN IN CAN BUS LINES (LANE DEPARTURE WARNING CAMERA BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the T12 lane warning camera connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition T12-6 (CA1P) - T12-12 (CA1N) Cable disconnected from negative (-) battery terminal 54 to 69 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Lane Departure Warning Camera) NG --> REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (LANE DEPARTURE WARNING CAMERA) OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (GROUND TERMINAL) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition T12-11 (GND) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Lane Departure Warning Camera) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT) OK: Go to next step
  5. CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL) Connect the cable to the negative (-) battery terminal. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition T12-7 (IGB) - Body ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Lane Departure Warning Camera) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) OK --> See step 7
  6. GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC. Refer to «DTC U1002: Lost Communication with Gateway Module (Sensor Bus)»(ref-598694-S36025584572014021400000)
  7. REPLACE LANE DEPARTURE WARNING CAMERA. Refer to «REMOVAL [06/2012 - ]»(ref-598474-S22686840092014021400000)
  1. RECONFIRM DTC OUTPUT Reconfirm DTCs. HINT: If DTC U1002 is output from Gateway of the network gateway ECU, this indicates a sub bus 2 malfunction. Troubleshoot for DTC U1002 and check for malfunctions in sub bus 2. Result Result Proceed to U1002 is not output from network gateway ECU (Techstream display: Gateway) A U1002 is output from network gateway ECU (Techstream display: Gateway) B B --> See step 5 A: Go to next step
  2. CHECK CAN BUS LINE FOR DISCONNECTION (SEAT BELT CONTROL ECU BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the H78 seat belt control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H78-1 (CANH) - H78-2 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Seat Belt Control ECU) NG --> REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (SEAT BELT CONTROL ECU) OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL) Disconnect the H77 seat belt control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H77-8 (PGND) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Seat Belt Control ECU) Connect the cable to the negative (-) battery terminal. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition H77-7 (+B) - Body ground Engine switch off 11 to 14 V H78-8 (IG1) - Body ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Seat Belt Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) OK --> See step 4
  4. REPLACE SEAT BELT CONTROL ECU. Refer to «REMOVAL [06/2012 - ]»(ref-598697-S04682338222014021400000)
  5. GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC. Refer to «DTC U1002: Lost Communication with Gateway Module (Network Gateway ECU)»(ref-598694-S04714271382014021400000)
  1. RECONFIRM DTC OUTPUT Reconfirm DTCs. HINT: If DTC U1002 is output from Main Body of the main body ECU, this indicates a sub bus 1 malfunction. Troubleshoot for DTC U1002 and check for malfunctions in sub bus 1. Result Result Proceed to U1002 is not output from main body ECU (Techstream display: Main Body) A U1002 is output from main body ECU (Techstream display: Main Body) B B --> See step 6 A: Go to next step
  2. CHECK FOR OPEN IN SUB BUS 1 LINES (MULTIPLEX TILT AND TELESCOPIC ECU BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the H12 multiplex tilt and telescopic ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H12-3 (CANP) - H12-11 (CANN) Cable disconnected from negative (-) battery terminal 54 to 69 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Multiplex Tilt and Telescopic ECU) NG --> REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU) OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (GROUND TERMINAL) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H12-1 (GND) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Multiplex Tilt and Telescopic ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT) OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL) Connect the cable to the negative (-) battery terminal. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition H12-9 (ECUB) - Body ground Always 11 to 14 V H12-10 (IG) - Body ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Multiplex Tilt and Telescopic ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) OK --> See step 5
  5. REPLACE MULTIPLEX TILT AND TELESCOPIC ECU. Refer to «REMOVAL [06/2012 - ]»(ref-598450-S08989955862014021400000)
  6. GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC. Refer to «DTC U1002: Lost Communication with Gateway Module (Main Body ECU)»(ref-598694-S08578728732014021400000)
  1. CHECK DTC (BRAKE CONTROL SYSTEM) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes. Result Result Proceed to OK (DTC C1241 is not output) OK NG (DTC C1241 is output) NG NG --> See step 3 OK: Go to next step
  2. CHECK FOR OPEN IN CAN BUS LINES (BRAKE ACTUATOR ASSEMBLY BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the A40 brake actuator assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A40-25 (CANH) - A40-14 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Brake Actuator Assembly) NG --> REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (BRAKE ACTUATOR ASSEMBLY) OK --> See step 4
  3. GO TO DIAGNOSIS PROCEDURES INDICATED BY OUTPUT DTC. Refer to «DTC C1241: Low Power Supply Voltage Malfunction»(ref-598639-S09136560012014021400000)
  4. REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to «REMOVAL [06/2012 - ]»(ref-598641-S34092244842014021400000)
  1. CHECK FOR OPEN IN CAN BUS LINES (CLEARANCE WARNING ECU ASSEMBLY BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the H61 clearance warning ECU assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H61-17 (R1) - H61-18 (R2) Cable disconnected from negative (-) battery terminal 54 to 69 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Clearance Warning ECU Assembly) NG --> REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY) OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H61-27 (E) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Clearance Warning ECU Assembly) Connect the cable to the negative (-) battery terminal. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition H61-12 (IG) - Body ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Clearance Warning ECU Assembly) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) OK --> See step 3
  3. REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to «REMOVAL [06/2012 - ]»(ref-598649-S33996160182014021400000)
  1. CHECK FOR OPEN IN CAN BUS LINES (POWER STEERING ECU WITH MOTOR ASSEMBLY BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the c1 power steering ECU with motor assembly connector. TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Power Steering ECU with Motor Assembly) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition c1-7 (CANH) - c1-8 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 ohms NG --> REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (POWER STEERING ECU WITH MOTOR ASSEMBLY) OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Disconnect the c2 power steering ECU with motor assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition c2-2 (PGND) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Power Steering ECU with Motor Assembly) Connect the cable to the negative (-) battery terminal. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition c1-1 (IG) - Body ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Power Steering ECU with Motor Assembly) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) OK --> See step 3
  3. REPLACE POWER STEERING ECU WITH MOTOR ASSEMBLY. Refer to «REMOVAL [06/2012 - ]»(ref-598663-S31044558572014021400000)
  1. CHECK FOR OPEN IN CAN BUS LINES (ECM MAIN LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the A22 ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A22-13 (CANH) - A22-26 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to ECM) NG --> REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (ECM MAIN LINE) OK: Go to next step
  2. CHECK ECM POWER SOURCE CIRCUIT Check the ECM power source circuit. Refer to «ECM Power Source Circuit»(ref-598599-S31649039382014021400000) . NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) OK --> See step 3
  3. REPLACE ECM. Refer to «REMOVAL [06/2012 - ]»(ref-598604-S28038138762014021400000)
  1. CHECK FOR OPEN IN CAN BUS LINES (AIRBAG SENSOR ASSEMBLY BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the H36 airbag sensor assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H36-13 (CANH) - H36-22 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Airbag Sensor Assembly) NG --> REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (AIRBAG SENSOR ASSEMBLY) OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H36-25 (E1) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms H36-26 (E2) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms Connect the cable to the negative (-) battery terminal. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition H36-21 (IG2) - Body ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Airbag Sensor Assembly) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) OK --> See step 3
  3. REPLACE AIRBAG SENSOR ASSEMBLY. Refer to «REMOVAL [06/2012 - ]»(ref-598451-S42601605772014021400000)
  1. CHECK FOR OPEN IN CAN BUS LINES (MULTI-MEDIA MODULE RECEIVER ASSEMBLY BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the H97 multi-media module receiver assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H97-1 (CANH) - H97-2 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Multi-media Module Receiver Assembly) NG --> REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY) OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H97-12 (GND1) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms Connect the cable to the negative (-) battery terminal. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition H97-16 (ACC1) - Body ground Engine switch on (ACC) 11 to 14 V H97-17 (+B1) - Body ground Engine switch off 11 to 14 V H97-15 (IG) - Body ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Multi-media Module Receiver Assembly) Result Result Proceed to OK (w/ Navigation system) A OK (w/ Audio and visual system (w/ multi-display with parking assist monitor system)) B NG C B --> See step 4 C --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) A --> See step 3
  3. REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY. Refer to «REMOVAL [06/2012 - ]»(ref-598632-S14835909972014021400000)
  4. REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY. Refer to «REMOVAL [06/2012 - ]»(ref-598631-S12377085272014021400000)
  1. CHECK FOR OPEN IN CAN BUS LINES (RADIO RECEIVER ASSEMBLY BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the H89 radio receiver assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H89-9 (CANH) - H89-10 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Radio Receiver Assembly) NG --> REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (RADIO RECEIVER ASSEMBLY) OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Disconnect the H90 radio receiver assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H90-20 (GND1) - Body ground Cable disconnected from negative (-) battery terminal Below 1 ohms Connect the cable to the negative (-) battery terminal. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition H90-11 (ACC1) - Body ground Engine switch on (ACC) 11 to 14 V H90-1 (+B1) - Body ground Engine switch off 11 to 14 V H89-1 (IG) - Body ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Radio Receiver Assembly) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) OK --> See step 3
  3. REPLACE RADIO RECEIVER ASSEMBLY. Refer to «REMOVAL [06/2012 - ]»(ref-598631-S12377085272014021400000)
  1. CHECK FOR SHORT TO GND IN CAN BUS LINE (DLC3 BRANCH LINE) Disconnect the cable from the negative (-) battery terminal. Disconnect the H119 DLC3 branch line connector. TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to CAN Junction Connector LH1) *b to DLC3 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 Condition Specified Condition H29-6 (CANH) - H29-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher H29-14 (CANL) - H29-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher TEXT IN ILLUSTRATION *1 DLC3 NG --> REPAIR OR REPLACE CAN BRANCH LINE CONNECTED TO DLC3 OK: Go to next step
  2. CHECK FOR SHORT TO GND IN CAN BUS LINE Reconnect the H119 DLC3 branch line connector. Disconnect the connectors from the CAN junction connector LH1 and CAN junction connector RH1 one at a time. HINT: Disconnect the ECU and sensor connectors other than the DLC3 branch lines and CAN main bus lines between the CAN junction connector LH1 and CAN junction connector RH1. TEXT IN ILLUSTRATION *1 DLC3 Using an ohmmeter, measure the resistance between terminals 6 (CANH) and 4 (CG), and between terminals 14 (CANL) and 4 (CG) of the DLC3 each time a connector is disconnected. TEXT IN ILLUSTRATION *A w/ Blind Spot Monitor System or Lane Departure Alert System *B w/ Intuitive Parking Assist System *C w/ Navigation System or w/ Audio and Visual System (w/ Multi-display with Parking Assist Monitor System) *D w/ Audio and Visual System (w/ Multi-display without Parking Assist Monitor System) *1 Steering Sensor *2 Main Body ECU (Multiplex Network Body ECU) *3 Airbag Sensor Assembly *4 DLC3 *5 Combination Meter Assembly *6 Power Steering ECU with Motor Assembly *7 Brake Actuator Assembly (Skid Control ECU) *8 Air Conditioning Amplifier Assembly *9 ECM *10 Network Gateway ECU *11 Certification ECU (Smart Key ECU Assembly) *12 Clearance Warning ECU Assembly *13 Multi-media Module Receiver Assembly *14 Radio Receiver Assembly *15 CAN Junction Connector LH1 *16 CAN Junction Connector RH1 TEXT IN ILLUSTRATION *a Component without harness connected (CAN Junction Connector LH1) - - WIRING COLOR CAN Junction Connector LH1 Side Code Color (CANH Side) Color (CANL Side) Power steering ECU with motor assembly H133 B W CAN main bus line (bus line connecting CAN junction connector LH1 and CAN junction connector RH1) H116 R W Combination meter assembly H117 G W DLC3 H119 L W Airbag sensor assembly H134 Y W Main body ECU (Multiplex network body ECU) H118 V W Steering sensor H120 P W TEXT IN ILLUSTRATION *a Component without harness connected (CAN Junction Connector RH1) - - WIRING COLOR CAN Junction Connector RH1 Side Code Color (CANH Side) Color (CANL Side) Multi-media module receiver assembly*1*2 Radio receiver assembly*3 H128 BE W Clearance warning ECU assembly*4 H132 P W Certification ECU (Smart key ECU assembly) H127 V W Network gateway ECU*5 H129 Y W ECM H125 L W Air conditioning amplifier assembly H123 G W CAN main bus line (bus line connecting CAN junction connector LH1and CAN junction connector RH1) H122 R W Brake actuator assembly (Skid control ECU) H126 B W *1: w/ Navigation system *2: w/ Audio and visual system (w/ multi-display with parking assist monitor system) *3: w/ Audio and visual system (w/ multi-display without parking assist monitor system) *4: w/ Intuitive parking assist system *5: w/ Blind spot monitor system or lane departure alert system NOTE: Do not reconnect the disconnected connectors until this inspection is complete because there may be a short to GND in 2 or more CAN bus lines. Result Symptom Proceed to The resistance between terminals 6 (CANH) and 4 (CG), or the resistance between 14 (CANL) and 4 (CG) is still below 200 ohms when all the specified connectors are disconnected from the CAN junction connector. (There is a short to GND in the CAN main bus lines between the CAN junction connector LH1 and CAN junction connector RH1.) A The resistance between terminals 6 (CANH) and 4 (CG), or the resistance between 14 (CANL) and 4 (CG) becomes normal (200 ohms or more) when a connector is disconnected from the CAN junction connector. (There is a short to GND in one of the areas that relate to the disconnected bus lines.) B When there is a short to GND in one or more of the bus lines that connect to an ECU (or sensor): Reconnect all of the connectors to the CAN junction connector, except for the one that was disconnected last (the bus line that is shorted to GND). Check that the resistance shown on the tester is normal (200 ohms or more) to confirm that there is a short to GND in the one branch line only. HINT: Connectors that connect to the CAN junction connector can be distinguished by the color of their CAN bus lines. Reconnecting the connectors to non-original positions on the CAN junction connector does not affect system performance. However, it is preferred to reconnect the connectors to their original positions to avoid negative effects on the wiring such as tension on the wiring harnesses, and to make future maintenance easier. When there is no short to GND in any of the bus lines that connect to the ECUs and sensors: With all the specified connectors for ECUs and sensors disconnected, proceed with the inspection of the CAN bus main lines between the CAN junction connector LH1 and CAN junction connector RH1. B --> See step 5 A: Go to next step
  3. CHECK FOR SHORT TO GND IN CAN BUS LINE (CAN J/C LH1) Disconnect the H116 CAN main bus line connector. TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to CAN Junction Connector LH1) *b to CAN Junction Connector RH1 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 Condition Specified Condition H29-6 (CANH) - H29-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher H29-14 (CANL) - H29-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher TEXT IN ILLUSTRATION *1 DLC3 NG --> REPLACE CAN JUNCTION CONNECTOR LH1 OK: Go to next step
  4. CHECK FOR SHORT TO GND IN CAN BUS LINE (CAN J/C LH1 - CAN J/C RH1) Reconnect the H116 CAN main bus line connector. Disconnect the H122 CAN main bus line connector. TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to CAN Junction Connector RH1) *b to CAN Junction Connector LH1 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 Condition Specified Condition H29-6 (CANH) - H29-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher H29-14 (CANL) - H29-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher TEXT IN ILLUSTRATION *1 DLC3 NG --> REPAIR OR REPLACE CAN MAIN BUS LINE (CAN J/C LH1 - CAN J/C RH1) OK --> REPLACE CAN JUNCTION CONNECTOR RH1
  5. CHECK FOR SHORT TO GND IN CAN BUS LINE (ECU, SENSOR) Reconnect the connector of the bus line that is shorted to GND to the CAN junction connector (the connector that caused the bus line resistance to change to 200 ohms or more when it was disconnected). Disconnect the connector that includes the DLC3 connected CAN lines (such as CANH and CANL) from the ECU (or sensor) to which the bus line shorted to GND is connected. Refer to «TERMINALS OF ECU [06/2012 - ]»(ref-598635-S19366549242014021400000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H29-6 (CANH) - H29-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher H29-14 (CANL) - H29-4 (CG) Cable disconnected from negative (-) battery terminal 200 ohms or higher TEXT IN ILLUSTRATION *1 DLC3 HINT: If the resistance changes to 200 ohms or higher when the connector is disconnected from the ECU (or sensor), there may be a short in the ECU (or sensor). NG --> REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BUS LINE OR CONNECTOR OK --> REPLACE CORRESPONDING ECU OR SENSOR
  1. CHECK FOR OPEN IN ONE SIDE OF V BUS BRANCH LINE Based on the vehicle equipment and specifications, confirm the systems that use CAN communication. Refer to «DIAGNOSIS SYSTEM [06/2012 - ]»(ref-598642-S28836115522014021400000) . Using the Techstream, select and perform the CAN bus check. Refer to «DIAGNOSIS SYSTEM [06/2012 - ]»(ref-598642-S28836115522014021400000) . Observe the screen for approximately 2 minutes to check the ECUs and sensors that are not displayed on the screen and also those that repeatedly appear and disappear from the screen. Check the applicable communication stop mode for the ECU or sensor that is not displayed on the screen. NEXT --> See step 2
  2. GO TO CORRESPONDING COMMUNICATION STOP MODE. Refer to «PROBLEM SYMPTOMS TABLE [06/2012 - ]»(ref-598635-S22097753992014021400000)

More articles — CAN Communication System (Diagnostic Codes & Symptom Tests)