Inspection Procedure

WARNING: This page is about a different car, the 2009 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Turn the ignition switch off before measuring the resistance of the main CAN bus wires and the CAN Bus branch wire.
After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation.
Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If any doors need to be opened in order to check the connectors, open the doors and leave them open.

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 will help determine the cause of the malfunction.

CHECK FOR SHORT IN CAN BUS WIRES (DLC3 BRANCH WIRE)

Turn the ignition switch off.
Disconnect the CAN No. 1 junction connector.

Fig 1: Identifying E58 CAN No. 1 Junction Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Measure the resistance according to the value (s) in the table below.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E11-6 (CANH) - E11-14 (CANL)	Ignition switch off	1 MΩ or higher

NG: REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DLC3

Fig 2: Identifying E11 DLC3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 2 JUNCTION CONNECTOR)

Reconnect the CAN No. 1 junction connector.
Disconnect the CAN No. 2 junction connector.

Fig 3: Identifying A47 CAN No. 2 Junction Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Measure the resistance according to the value (s) in the table below.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E11-6 (CANH) - E11-14 (CANL)	Ignition switch off	108 to 132 Ω

NG: Go to step 7

Fig 4: Identifying E11 DLC3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FOR SHORT IN CAN BUS WIRES (ECM MAIN WIRE)

Measure the resistance according to the value (s) in the table below.

NOTE: The resistance must be measured after the CAN No. 2 junction connector is disconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
A47-10 (CANH) - A47-21 (CANL)	Ignition switch off	108 to 132 Ω

NG: Go to step 6

Fig 5: Identifying A47 CAN No. 2 Junction Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 2 JUNCTION CONNECTOR - SKID CONTROL ECU)

Disconnect the skid control ECU connector.

Fig 6: Identifying Skid Control ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Measure the resistance according to the value (s) in the table below.

NOTE: The resistance must be measured after the skid control ECU connector and CAN No. 2 junction connector are disconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
A47-8 (CANH) - A47-19 (CANL)	Ignition switch off	1 MΩ or higher

NG: REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 2 JUNCTION CONNECTOR - SKID CONTROL ECU)

Fig 7: Identifying A47 CAN No. 2 Junction Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FOR SHORT IN CAN BUS WIRES (SKID CONTROL ECU)

Reconnect the CAN No. 2 junction connector.
Measure the resistance according to the value (s) in the table below.

NOTE: The resistance must be measured after the skid control ECU connector is disconnected. The resistance must be measured after the CAN No. land CAN No. 2 junction connector are reconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E11-6 (CANH) - E11-14 (CANL)	Ignition switch off	54 Ω or higher

Fig 8: Identifying E11 DLC3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Result

RESULT REFERENCE

Result	Proceed to
OK (w/o VSC)	A
OK (w/ VSC)	B
NG	C

B: REPLACE BRAKE ACTUATOR ASSEMBLY (See REMOVAL )

C: REPLACE JUNCTION CONNECTOR (CAN No. 2)

A: REPLACE BRAKE ACTUATOR ASSEMBLY (See REMOVAL )

CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 2 JUNCTION CONNECTOR - ECM MAIN WIRE)

Disconnect the ECM connector.

Fig 9: Identifying A50 ECM Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Measure the resistance according to the value (s) in the table below.

NOTE: The resistance must be measured after the ECM connector and CAN No. 2 junction connector are disconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
A47-10 (CANH) - A47-21 (CANL)	Ignition switch off	1 MΩ or higher

Result

RESULT REFERENCE

Result	Proceed to
OK (for 2ZR-FE)	A
OK (for 2AZ-FE)	B
NG	C

B: REPLACE ECM (See REMOVAL )

C: REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CAN NO. 2 JUNCTION CONNECTOR - ECM)

Fig 10: Identifying A47 CAN No. 2 Junction Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

A: REPLACE ECM (See REMOVAL )

CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 1 JUNCTION CONNECTOR - CAN NO. 2 JUNCTION CONNECTOR)

Turn the ignition switch off.
Disconnect the CAN No. 1 junction connector.
Measure the resistance according to the value (s) in the table below.

NOTE: The resistance must be measured after the CAN No. 2 junction connector is disconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E58-10 (CANH) - E58-21 (CANL)	Ignition switch off	1 MΩ or higher

NG: REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - CAN NO. 2 JUNCTION CONNECTOR)

Fig 11: Identifying E58 CAN No. 1 Junction Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 1 JUNCTION CONNECTOR COMBINATION METER)

Measure the resistance according to the value (s) in the table below.

NOTE: The resistance must be measured after the CAN No. 1 junction connector is disconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E58-2 (CANH) - E58-13 (CANL)	Ignition switch off	108 to 132 Ω

NG: Go to step 23

Fig 12: Identifying E58 CAN No. 1 Junction Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 1 JUNCTION CONNECTOR STEERING ANGLE SENSOR)

Disconnect the steering angle sensor connector.

Fig 13: Identifying E49 Steering Angle Sensor Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Measure the resistance according to the value (s) in the table below.

NOTE: The resistance must be measured after the steering angle sensor connector and CAN No. 1 junction connector are disconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E58-5 (CANH) - E58-16 (CANL)	Ignition switch off	1 MΩ or higher

NG: REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - STEERING ANGLE SENSOR)

Fig 14: Identifying E58 CAN No. 1 Junction Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 1 JUNCTION CONNECTOR - POWER STEERING ECU)

Disconnect the power steering ECU connector.

Fig 15: Identifying E32 Power Steering ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Reconnect the CAN No. 2 junction connector.
Measure the resistance according to the value (s) in the table below.

NOTE: The resistance must be measured after the power steering ECU connector and CAN No. 1 junction connector are disconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E58-3 (CANH) - E58-14 (CANL)	Ignition switch off	1 MΩ or higher

NG: REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - POWER STEERING ECU)

Fig 16: Identifying E58 CAN No. 1 Junction Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 1 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR ASSEMBLY)

Disconnect the center airbag sensor assembly connector.

Fig 17: Identifying E14 Center Airbag Sensor Assembly Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Measure the resistance according to the value (s) in the table below.

NOTE: The resistance must be measured after the center airbag sensor assembly connector and CAN No. 1 junction connector are disconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E58-9 (CANH) - E58-20 (CANL)	Ignition switch off	1 MΩ or higher

NG: REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR ASSEMBLY)

Fig 18: Identifying E58 CAN No. 1 Junction Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 1 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER)

Disconnect the air conditioning amplifier connector.

Fig 19: Identifying E30 Auto And E63 Manual Air Conditioning Amplifier Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Measure the resistance according to the value (s) in the table below.

NOTE: The resistance must be measured after the air conditioning amplifier connector and CAN No. 1 junction connector are disconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E58-4 (CANH) - E58-15 (CANL)	Ignition switch off	1 MΩ or higher

NG: REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER)

Fig 20: Identifying E58 CAN No. 1 Junction Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 1 JUNCTION CONNECTOR - MAIN BODY ECU)

Disconnect the main body ECU connector.

Fig 21: Identifying E52 And E61 Main Body ECU Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Measure the resistance according to the value (s) in the table below.

NOTE: The resistance must be measured after the main body ECU connector and CAN No. 1 junction connector are disconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E58-8 (CANH) - E58-19 (CANL)	Ignition switch off	1 MΩ or higher

NG: REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - MAIN BODY ECU)

Fig 22: Identifying E58 CAN No. 1 Junction Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 1 JUNCTION CONNECTOR - YAW RATE SENSOR)

Disconnect the yaw rate sensor connector.

Fig 23: Identifying E97 Yaw Rate Sensor Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Measure the resistance according to the value (s) in the table below.

NOTE: The resistance must be measured after the yaw rate sensor connector and CAN No. 1 junction connector are disconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E58-6 (CANH) - E58-17 (CANL)	Ignition switch off	1 MΩ or higher

NG: REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - YAW RATE SENSOR)

Fig 24: Identifying E58 CAN No. 1 Junction Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 1 JUNCTION CONNECTOR ACCESSORY GATEWAY)

w/ remote engine starter:
1. Disconnect the accessory gateway connector from the accessory.
Fig 25: Identifying E43 Accessory Gateway Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Measure the resistance according to the value (s) in the table below.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E58-11 (CAN+) - E58-22 (CAN-)	Ignition switch off	1 MΩ or higher

Result

RESULT REFERENCE

Result	Proceed to
OK	A
NG (w/o remote engine starter)	B
NG (w/ remote engine starter)	C

B: REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - ACCESSORY GATEWAY)

C: Go to step 22

Fig 26: Identifying E58 CAN No. 1 Junction Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

A: Go to Next Step

CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 1 JUNCTION CONNECTOR)

Reconnect the CAN No. 1 junction connector and CAN No. 2 junction connector.
Measure the resistance according to the value (s) in the table below.

NOTE:

The resistance must be measured after the main wire connected ECUs (ECM and combination meter), and CAN No. 1 and No. 2 junction connectors are reconnected.
The resistance must be measured after the all branch wire connected ECUs and sensor connectors are disconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E11-6 (CANH) - E11-14 (CANL)	Ignition switch off	54 Ω or higher

NG: REPLACE JUNCTION CONNECTOR (CAN No. 1)

Fig 27: Identifying E11 DLC3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FOR SHORT IN CAN BUS WIRES (STEERING ANGLE SENSOR)

Reconnect the steering angle sensor connector.
Measure the resistance according to the value (s) in the table below.

NOTE: The resistance must be measured after the steering angle sensor, main wire connected ECUs (ECM and combination meter), and CAN No. 1 and No. 2 junction connectors are reconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E11-6 (CANH) - E11-14 (CANL)	Ignition switch off	54 Ω or higher

NG: REPLACE STEERING ANGLE SENSOR (See REMOVAL )

Fig 28: Identifying E11 DLC3

OK: Go to Next Step

CHECK FOR SHORT IN CAN BUS WIRES (POWER STEERING ECU)

Reconnect the power steering ECU connector.
Measure the resistance according to the value (s) in the table below.

NOTE: The resistance must be measured after the power steering ECU, main wire connected ECUs (ECM and combination meter), and CAN No. 1 and No. 2 junction connectors are reconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E11-6 (CANH) - E11-14 (CANL)	Ignition switch off	54 Ω or higher

Fig 29: Identifying E11 DLC3

Result

RESULT REFERENCE

Result	Proceed to
OK	A
NG (for 2AZ-FE)	B
NG (for 2ZR-FE)	C

B: REPLACE POWER STEERING ECU (See POWER STEERING ECU (FOR 2AZ-FE) )

C: REPLACE POWER STEERING ECU (See POWER STEERING ECU (FOR 2ZR-FE) )

A: Go to Next Step

CHECK FOR SHORT IN CAN BUS WIRES (CENTER AIRBAG SENSOR ASSEMBLY)

Reconnect the center airbag sensor assembly connector.
Measure the resistance according to the value (s) in the table below.

NOTE: The resistance must be measured after the center airbag sensor assembly, main wire connected ECUs (ECM and combination meter), and CAN No. 1 and No. 2 junction connectors are reconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E11-6 (CANH) - E11-14 (CANL)	Ignition switch off	54 Ω or higher

NG: REPLACE CENTER AIRBAG SENSOR ASSEMBLY (See ON-VEHICLE INSPECTION )

Fig 30: Identifying E11 DLC3

OK: Go to Next Step

CHECK FOR SHORT IN CAN BUS WIRES (AIR CONDITIONING AMPLIFIER)

Reconnect the air conditioning amplifier connector.
Measure the resistance according to the value (s) in the table below.

NOTE: The resistance must be measured after the air conditioning amplifier, main wire connected ECUs (ECM and combination meter), and CAN No. 1 and No. 2 junction connectors are reconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E11-6 (CANH) - E11-14 (CANL)	Ignition switch off	54 Ω or higher

NG: REPLACE AIR CONDITIONING AMPLIFIER (See AIR CONDITIONING AMPLIFIER )

Fig 31: Identifying E11 DLC3

OK: Go to Next Step

CHECK FOR SHORT IN CAN BUS WIRES (MAIN BODY ECU)

Reconnect the main body ECU connector.
Measure the resistance according to the value (s) in the table below.

NOTE: The resistance must be measured after the main body ECU, main wire connected ECUs (ECM and combination meter), and CAN No. 1 and No. 2 junction connectors are reconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E11-6 (CANH) - E11-14 (CANL)	Ignition switch off	54 Ω or higher

NG: REPLACE MAIN BODY ECU

Fig 32: Identifying E11 DLC3

OK: Go to Next Step

CHECK FOR SHORT IN CAN BUS WIRES (ACCESSORY GATEWAY)

Reconnect the accessory gateway connector.
Measure the resistance according to the value (s) in the table below.

NOTE: The resistance must be measured after the main body ECU, main wire connected ECUs (ECM and combination meter), and CAN No. 1 and No. 2 junction connectors are reconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E11-6 (CANH) - E11-14 (CANL)	Ignition switch off	54 Ω or higher

NG: REPLACE THE ACCESSORY

Fig 33: Identifying E11 DLC3

OK: REPLACE YAW RATE SENSOR

CHECK FOR SHORT IN CAN BUS WIRES (COMBINATION METER ECU)

Disconnect the combination meter ECU connector.

Fig 34: Identifying E46 Combination Meter ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Measure the resistance according to the value (s) in the table below.

NOTE: The resistance must be measured after the combination meter ECU connector and CAN No. 1 junction connector are disconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E58-2 (CANH) - E58-13 (CANL)	Ignition switch off	1 MΩ or higher

NG: REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - COMBINATION METER)

Fig 35: Identifying E58 CAN No. 1 Junction Connector

OK: REPLACE COMBINATION METER (See COMBINATION METER )