NETWORKING CAN COMMUNICATION SYSTEM(for Gasoline Model) Check CAN Communication Connection
DESCRIPTION
| Symptom | Trouble Area |
|---|---|
| Check CAN Communication Connection | ·
CAN main bus line, CAN branch line or connector ·
Power source circuit of central gateway ECU (network gateway ECU) ·
Central gateway ECU (network gateway ECU) ground circuit ·
Central gateway ECU (network gateway ECU) ·
Power source circuit of DLC3 ·
DLC3 ground circuit |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- CAUTION:
-
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
- NOTICE:
- ·
Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.
·Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 10 minutes or more before measuring the resistance.
·After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) battery terminal.
·When disconnecting and reconnecting the battery.
- HINT:
-
When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.
·Some parts must be initialized and set when replacing or removing and installing parts.
·After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.
DTC check procedure: Turn the ignition switch to ON and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.
·After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.
·Inspect the fuses for circuits related to this system before performing the following procedure.
- HINT:
- ·
Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
·When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.
PROCEDURE
Connect the GTS to the DLC3 of another vehicle.
Turn the ignition switch to ON.
Turn the GTS on.
Check that the GTS and ECUs can communicate with the ignition switch ON.
- HINT:
- ·
ECUs and sensors are not displayed on the "Communication Bus Check" screen when the GTS cannot communicate with the vehicle.
·If communication between the GTS and ECUs is not possible, either the GTS or vehicle has a malfunction.
·If communication between the GTS and ECUs is still not possible even when the GTS is connected to another vehicle, the GTS has a malfunction. Perform the self tests described in the GTS operator's manual. (The GTS may be malfunctioning or its battery may be discharged.)
- Result:
Result Proceed to OK (Communication between the GTS and the vehicle is not possible but communication is possible when connected to another vehicle.) A NG (Communication is not possible between the GTS and the vehicle, nor between the GTS and another vehicle.) B
A
B
Confirm error on the GTS screen.
- Result:
Result Proceed to "A communication error with Engine ECU occurred. Please confirm that Engine ECU is properly installed." is displayed. A Cannot proceed to vehicle selection screen. B
A
B
Disconnect the cable from the negative (-) battery terminal.
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Component with harness connected
(Central Gateway ECU (Network Gateway ECU)) |
- | - |
- Standard Resistance:
Tester Connection Condition Specified Condition Result Click Location & Routing(E66,E58)Location & Routingewd_type=routing;type=c,c;code=E66,E58
Click Connector(E66)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Network Gateway ECUewd_type=component;type=c;code=E66;pinno=26,25
Click Connector(E58)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Data Link Connector 3ewd_type=component;type=c;code=E58;pinno=4,16
E66-26 (CA4H) - E66-25 (CA4L) Cable disconnected from negative (-) battery terminal 54 to 69 Ω Below 54 Ω: Short circuit between bus lines 70 Ω or higher: Open circuit in main bus lines E66-26 (CA4H) - E58-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground E66-25 (CA4L) - E58-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground E66-26 (CA4H) - E58-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short E66-25 (CA4L) - E58-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
- Result:
Result Proceed to OK (CAN bus main lines are normal) A NG (There is an open or short in a CAN bus main line of a suspected bus) B
A
- HINT:
-
Inspect the ECM supply power or VC voltage.
B
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition Click Location & Routing(E58)Location & Routingewd_type=routing;type=c;code=E58
Click Connector(E58)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Data Link Connector 3ewd_type=component;type=c;code=E58;pinno=16
E58-16 (BAT) - Body ground Always 11 to 14 V
Disconnect the cable from the negative (-) battery terminal.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Click Location & Routing(E58)Location & Routingewd_type=routing;type=c;code=E58
Click Connector(E58)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Data Link Connector 3ewd_type=component;type=c;code=E58;pinno=4
E58-4 (CG) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Click Location & Routing(E58)Location & Routingewd_type=routing;type=c;code=E58
Click Connector(E58)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Data Link Connector 3ewd_type=component;type=c;code=E58;pinno=6,14
E58-6 (CANH) - E58-14 (CANL) Cable disconnected from negative (-) battery terminal Below 70 Ω
- Result:
Result OK NG
OK
NG
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Click Location & Routing(E58)Location & Routingewd_type=routing;type=c;code=E58
Click Connector(E58)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Data Link Connector 3ewd_type=component;type=c;code=E58;pinno=6,14,4,16
E58-6 (CANH) - E58-14 (CANL) Cable disconnected from negative (-) battery terminal 54 Ω or higher E58-6 (CANH) - E58-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher E58-14 (CANL) - E58-4 (CG) E58-6 (CANH) - E58-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E58-14 (CANL) - E58-16 (BAT)
- Result:
Result OK NG
OK
NG
Disconnect the E66 central gateway ECU (network gateway ECU) connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Click Location & Routing(E66)Location & Routingewd_type=routing;type=c;code=E66
Click Connector(E66)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Network Gateway ECUewd_type=component;type=c;code=E66;pinno=22
E66-22 (GND) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
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 Click Location & Routing(E66)Location & Routingewd_type=routing;type=c;code=E66
Click Connector(E66)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Network Gateway ECUewd_type=component;type=c;code=E66;pinno=1,2,19,20
E66-1 (BATT) - Body ground Always 11 to 14 V E66-2 (ACC) - Body ground Ignition switch ACC 11 to 14 V E66-19 (IGP) - Body ground Ignition switch ON 11 to 14 V E66-20 (IGR) - Body ground Ignition switch ON 11 to 14 V
- Result:
Result OK NG
OK
NG
Disconnect the E66 central gateway ECU (network gateway ECU) connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Click Location & Routing(E66,E58)Location & Routingewd_type=routing;type=c,c;code=E66,E58
Click Connector(E66)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Network Gateway ECUewd_type=component;type=c;code=E66;pinno=16,17
Click Connector(E58)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Data Link Connector 3ewd_type=component;type=c;code=E58;pinno=6,14
E66-16 (CA6H) - E58-6 (CANH) Cable disconnected from negative (-) battery terminal Below 1 Ω E66-17 (CA6L) - E58-14 (CANL)
- Result:
Proceed to OK NG
OK
NG
Disconnect the E66 central gateway ECU (network gateway ECU) connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Click Location & Routing(E66,E58)Location & Routingewd_type=routing;type=c,c;code=E66,E58
Click Connector(E66)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Network Gateway ECUewd_type=component;type=c;code=E66;pinno=16,17
Click Connector(E58)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Data Link Connector 3ewd_type=component;type=c;code=E58;pinno=4,16
E66-16 (CA6H) - E66-17 (CA6L) Cable disconnected from negative (-) battery terminal 1 MΩ or higher E66-16 (CA6H) - E58-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher E66-17 (CA6L) - E58-4 (CG) E66-16 (CA6H) - E58-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E66-17 (CA6L) - E58-16 (BAT)
- Result:
Result OK NG
OK
NG