NETWORKING CAN COMMUNICATION SYSTEM TERMINALS OF ECU
- NOTICE:
- ·
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.
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·Turn the ignition switch off before measuring the resistances between CAN main bus lines and between CAN branch lines.
·Turn the ignition switch off before inspecting CAN bus lines for a ground short.
·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 1 minute or more before measuring the resistance.
·This section describes the standard values for all CAN related components.
- HINT:
- ·
Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
·Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
NO. 1 CAN JUNCTION CONNECTOR
Check the No. 1 CAN junction connector.
Connection diagram
*a | Front view of wire harness connector
(to No. 1 CAN Junction Connector) |
*b | to No. 2 CAN Junction Connector |
*c | to Skid Control ECU (Brake Actuator Assembly)
(w/ ABS) |
*d | to ECM |
Check the connection diagram of the components which are connected to the No. 1 CAN junction connector.
Terminal No. (Symbol) | Wiring Color | Connected to |
---|---|---|
A39-1 (CANH) | L | No. 2 CAN junction connector |
A39-12 (CANL) | W | |
A39-5 (CANH) | V | Skid control ECU (brake actuator assembly)* |
A39-16 (CANL) | W | |
A39-6 (CANH) | B | ECM |
A39-17 (CANL) | W |
*: w/ ABS
NO. 2 CAN JUNCTION CONNECTOR
Check the No. 2 CAN junction connector.
Connection diagram
*a | Front view of wire harness connector
(to No. 2 CAN Junction Connector) |
*b | to Airbag ECU Assembly
(w/ Airbag System) |
*c | to Air Conditioning Amplifier Assembly | *d | to Combination Meter Assembly |
*e | to No. 1 CAN Junction Connector | *f | to Main Body ECU (Multiplex Network Body ECU) |
*g | to Power Steering ECU Assembly | *h | to DLC3 |
Check the connection diagram of the components which are connected to the No. 2 CAN junction connector.
Terminal No. (Symbol) | Wiring Color | Connected to |
---|---|---|
E55-1 (CANH) | V | Airbag ECU assembly* |
E55-12 (CANL) | W | |
E55-2 (CANH) | Y | Air conditioning amplifier assembly |
E55-13 (CANL) | W | |
E55-4 (CANH) | LG | Combination meter assembly |
E55-15 (CANL) | W | |
E55-5 (CANH) | L | No. 1 CAN junction connector |
E55-16 (CANL) | W | |
E55-8 (CANH) | G | Main body ECU (multiplex network body ECU) |
E55-19 (CANL) | W | |
E55-9 (CANH) | GR | Power steering ECU assembly |
E55-20 (CANL) | W | |
E55-11 (CANH) | BE | DLC3 |
E55-22 (CANL) | W |
*: w/ Airbag System
DLC3
Disconnect the cable from the negative (-) battery terminal.
*1 | DLC3 | - | - |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition E13-6 (CANH) - E13-14 (CANL) BE - W HIGH-level CAN bus line - LOW-level CAN bus line Cable disconnected from negative (-) battery terminal 54 to 69 Ω E13-6 (CANH) - E13-4 (CG) BE - W-B HIGH-level CAN bus line - Ground Cable disconnected from negative (-) battery terminal 200 Ω or higher E13-14 (CANL) - E13-4 (CG) W - W-B LOW-level CAN bus line - Ground Cable disconnected from negative (-) battery terminal 200 Ω or higher E13-6 (CANH) - E13-16 (BAT) BE - G HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E13-14 (CANL) - E13-16 (BAT) W - G LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
ECM (for 1ZR-FE)
*a | Component without harness connected
(ECM) |
- | - |
Disconnect the cable from the negative (-) battery terminal.
Disconnect the A56 and B56 ECM connectors.
*a | Front view of wire harness connector
(to ECM) |
- | - |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A56-8 (CANH) - A56-9 (CANL) B - W HIGH-level CAN bus line - LOW-level CAN bus line Cable disconnected from negative (-) battery terminal 108 to 132 Ω A56-8 (CANH) - B56-105 (E1) B - BR HIGH-level CAN bus line - Ground Cable disconnected from negative (-) battery terminal 200 Ω or higher A56-9 (CANL) - B56-105 (E1) W - BR LOW-level CAN bus line - Ground Cable disconnected from negative (-) battery terminal 200 Ω or higher A56-8 (CANH) - A56-20 (BATT) B - P HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher A56-9 (CANL) - A56-20 (BATT) W - P LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
ECM (for 2ZR-FE)
*a | Component without harness connected
(ECM) |
- | - |
Disconnect the cable from the negative (-) battery terminal.
Disconnect the A40 and B33 ECM connectors.
*a | Front view of wire harness connector
(to ECM) |
- | - |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A40-13 (CANH) - A40-26 (CANL) B - W HIGH-level CAN bus line - LOW-level CAN bus line Cable disconnected from negative (-) battery terminal 108 to 132 Ω A40-13 (CANH) - B33-16 (E1) B - BR HIGH-level CAN bus line - Ground Cable disconnected from negative (-) battery terminal 200 Ω or higher A40-26 (CANL) - B33-16 (E1) W - BR LOW-level CAN bus line - Ground Cable disconnected from negative (-) battery terminal 200 Ω or higher A40-13 (CANH) - A40-1 (BATT) B - P HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher A40-26 (CANL) - A40-1 (BATT) W - P LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
ECM (for 2NZ-FE)
*a | Component without harness connected
(ECM) |
- | - |
Disconnect the cable from the negative (-) battery terminal.
Disconnect the A56 and B56 ECM connectors.
*a | Front view of wire harness connector
(to ECM) |
- | - |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A56-41 (CANH) - A56-49 (CANL) B - W HIGH-level CAN bus line - LOW-level CAN bus line Cable disconnected from negative (-) battery terminal 108 to 132 Ω A56-41 (CANH) - B56-104 (E1) B - BR HIGH-level CAN bus line - Ground Cable disconnected from negative (-) battery terminal 200 Ω or higher A56-49 (CANL) - B56-104 (E1) W - BR LOW-level CAN bus line - Ground Cable disconnected from negative (-) battery terminal 200 Ω or higher A56-41 (CANH) - A56-20 (BATT) B - P HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher A56-49 (CANL) - A56-20 (BATT) W - P LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
COMBINATION METER ASSEMBLY
*a | Component without harness connected
(Combination Meter Assembly) |
- | - |
Disconnect the cable from the negative (-) battery terminal.
Disconnect the E43 combination meter assembly connector.
*a | Front view of wire harness connector
(to Combination Meter Assembly) |
- | - |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition E43-32 (CANH) - E43-31 (CANL) LG - W HIGH-level CAN bus line - LOW-level CAN bus line Cable disconnected from negative (-) battery terminal 108 to 132 Ω E43-32 (CANH) - E43-21 (ET) LG - BR HIGH-level CAN bus line - Ground Cable disconnected from negative (-) battery terminal 200 Ω or higher E43-31 (CANL) - E43-21 (ET) W - BR LOW-level CAN bus line - Ground Cable disconnected from negative (-) battery terminal 200 Ω or higher E43-32 (CANH) - E43-40 (B) LG - W HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E43-31 (CANL) - E43-40 (B) W - W LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
*1 | Main Body ECU (Multiplex Network Body ECU) | - | - |
*a | Component without harness connected
(Instrument Panel Junction Block Assembly and Main Body ECU (Multiplex Network Body ECU)) |
- | - |
Disconnect the cable from the negative (-) battery terminal.
Disconnect the E31 main body ECU (multiplex network body ECU) connector.
*1 | DLC3 | - | - |
*a | Front view of wire harness connector
(to Main Body ECU (Multiplex Network Body ECU)) |
- | - |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition E31-14 (CANH) - E31-13 (CANL) G - W HIGH-level CAN bus line - LOW-level CAN bus line Cable disconnected from negative (-) battery terminal 54 to 69 Ω E31-14 (CANH) - E13-4 (CG) G - W-B HIGH-level CAN bus line - Ground Cable disconnected from negative (-) battery terminal 200 Ω or higher E31-13 (CANL) - E13-4 (CG) W - W-B LOW-level CAN bus line - Ground Cable disconnected from negative (-) battery terminal 200 Ω or higher E31-14 (CANH) - E13-16 (BAT) G - G HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E31-13 (CANL) - E13-16 (BAT) W - G LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) (w/ ABS)
*a | Component without harness connected
(Skid Control ECU (Brake Actuator Assembly)) |
- | - |
Disconnect the cable from the negative (-) battery terminal.
Disconnect the A48 skid control ECU (brake actuator assembly) connector.
*a | Front view of wire harness connector
(to Skid Control ECU (Brake Actuator Assembly)) |
- | - |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A48-25 (CANH) - A48-14 (CANL) V - W HIGH-level CAN bus line - LOW-level CAN bus line Cable disconnected from negative (-) battery terminal 54 to 69 Ω A48-25 (CANH) - A48-1 (GND1) V - W-B HIGH-level CAN bus line - Ground Cable disconnected from negative (-) battery terminal 200 Ω or higher A48-14 (CANL) - A48-1 (GND1) W - W-B LOW-level CAN bus line - Ground Cable disconnected from negative (-) battery terminal 200 Ω or higher A48-25 (CANH) - A48-12 (+BS) V - W HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher A48-14 (CANL) - A48-12 (+BS) W - W LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
POWER STEERING ECU ASSEMBLY
*a | Component without harness connected
(Power Steering ECU Assembly) |
- | - |
Disconnect the cable from the negative (-) battery terminal.
Disconnect the A25 and E40 power steering ECU assembly connectors.
*a | Front view of wire harness connector
(to Power Steering ECU Assembly) |
- | - |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition E40-7 (CANH) - E40-8 (CANL) GR - W HIGH-level CAN bus line - LOW-level CAN bus line Cable disconnected from negative (-) battery terminal 54 to 69 Ω E40-7 (CANH) - A25-2 (PGND) GR - W-B HIGH-level CAN bus line - Ground Cable disconnected from negative (-) battery terminal 200 Ω or higher E40-8 (CANL) - A25-2 (PGND) W - W-B LOW-level CAN bus line - Ground Cable disconnected from negative (-) battery terminal 200 Ω or higher E40-7 (CANH) - A25-1 (PIG) GR - L HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E40-8 (CANL) - A25-1 (PIG) W - L LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
AIRBAG ECU ASSEMBLY (w/ Airbag System)
*a | Component without harness connected
(Airbag ECU Assembly) |
- | - |
Disconnect the cable from the negative (-) battery terminal.
Disconnect the E14 airbag ECU assembly connector.
*1 | DLC3 | - | - |
*a | Front view of wire harness connector
(to Airbag ECU Assembly) |
- | - |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition E14-13 (CANH) - E14-22 (CANL) V - W HIGH-level CAN bus line - LOW-level CAN bus line Cable disconnected from negative (-) battery terminal 54 to 69 Ω E14-13 (CANH) - E14-25 (E1) V - W-B HIGH-level CAN bus line - Ground Cable disconnected from negative (-) battery terminal 200 Ω or higher E14-22 (CANL) - E14-25 (E1) W - W-B LOW-level CAN bus line - Ground Cable disconnected from negative (-) battery terminal 200 Ω or higher E14-13 (CANH) - E13-16 (BAT) V - G HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E14-22 (CANL) - E13-16 (BAT) W - G LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
AIR CONDITIONING AMPLIFIER ASSEMBLY
*a | Component without harness connected
(Air Conditioning Amplifier Assembly) |
- | - |
Disconnect the cable from the negative (-) battery terminal.
*1 | DLC3 | - | - |
*a | Front view of wire harness connector
(to Air Conditioning Amplifier Assembly) |
- | - |
Disconnect the E7 air conditioning amplifier assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition E7-8 (CANH) - E7-9 (CANL) Y - W HIGH-level CAN bus line - LOW-level CAN bus line Cable disconnected from negative (-) battery terminal 54 to 69 Ω E7-8 (CANH) - E7-23 (GND) Y - BR HIGH-level CAN bus line - Ground Cable disconnected from negative (-) battery terminal 200 Ω or higher E7-9 (CANL) - E7-23 (GND) W - BR LOW-level CAN bus line - Ground Cable disconnected from negative (-) battery terminal 200 Ω or higher E7-8 (CANH) - E13-16 (BAT) Y - G HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E7-9 (CANL) - E13-16 (BAT) W - G LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher