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 switches or any doors triggers related ECU and sensor communication with 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 TO GND IN CAN BUS WIRE (DLC3 BRANCH WIRE)

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

Fig 1: Identifying CAN No. 1 Junction 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 CAN No. 1 junction connector is disconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E11-6 (CANH) - E11-4 (CO)	Ignition switch off	200 Ω or higher
E11-14 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω 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 TO GND IN CAN BUS WIRE (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.

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
E11-6 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
E11-14 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG: Go to step 6

Fig 4: Identifying E11 DLC3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FOR SHORT TO GND IN CAN BUS WIRE (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) - E11-4 (CG)	Ignition switch off	200 Ω or higher
A47-21 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG: Go to step 5

Fig 5: Identifying A47 CAN No. 2 Junction And E11 DLC3 Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FOR SHORT TO GND IN CAN BUS WIRE (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) - E11-4 (CG)	Ignition switch off	200 Ω or higher
A47-19 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

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: 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 And E11 DLC3 Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

A: REPLACE BRAKE ACTUATOR ASSEMBLY (See REMOVAL )

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 JUNCTION CONNECTOR ECM)

Disconnect the ECM connector.

Fig 8: 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) - E11-4 (CG)	Ignition switch off	200 Ω or higher
A47-21 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω 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 BUS MAIN WIRE OR CONNECTOR (CAN NO. 2 JUNCTION CONNECTOR - ECM)

Fig 9: Identifying A47 CAN No. 2 Junction And E11 DLC3 Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

A: REPLACE ECM (See REMOVAL )

CHECK FOR SHORT TO GND IN CAN BUS WIRE (POWER STEERING ECU BRANCH WIRE)

Reconnect the CAN No. 2 junction connector.
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 reconnected.
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
E58-3 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
E58-14 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG: Go to step 14

Fig 10: Identifying E58 CAN No. 1 Junction And E11 DLC3 Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FOR SHORT TO GND IN CAN BUS WIRE (STEERING ANGLE SENSOR BRANCH WIRE)

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
E58-5 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
E58-16 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG: Go to step 15

Fig 11: Identifying E58 CAN No. 1 Junction And E11 DLC3 Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FOR SHORT TO GND IN CAN BUS WIRE (YAW RATE SENSOR BRANCH WIRE)

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
E58-6 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
E58-17 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG: Go to step 16

Fig 12: Identifying E58 CAN No. 1 Junction And E11 DLC3 Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FOR SHORT TO GND IN CAN BUS WIRE (MAIN BODY ECU BRANCH WIRE)

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
E58-8 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
E58-19 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG: Go to step 17

Fig 13: Identifying E58 CAN No. 1 Junction And E11 DLC3 Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FOR SHORT TO GND IN CAN BUS WIRE (AIR CONDITIONING AMPLIFIER BRANCH WIRE)

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
E58-4 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
E58-15 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG: Go to step 18

Fig 14: Identifying E58 CAN No. 1 Junction And E11 DLC3 Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CENTER AIRBAG SENSOR ASSEMBLY BRANCH WIRE)

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
E58-9 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
E58-20 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG: Go to step 19

Fig 15: Identifying E58 CAN No. 1 Junction And E11 DLC3 Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FOR SHORT TO GND IN CAN BUS WIRE (COMBINATION METER MAIN WIRE)

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) - E11-4 (CG)	Ignition switch off	200 Ω or higher
E58-13 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG: Go to step 20

Fig 16: Identifying E58 CAN No. 1 Junction And E11 DLC3 Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FOR SHORT TO GND IN CAN BUS WIRE (ACCESSORY GATEWAY BRANCH WIRE)

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
E58-11 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
E58-22 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

Result

RESULT REFERENCE

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

Fig 17: Identifying E58 CAN No. 1 Junction And E11 DLC3 Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

C: Go to step 21

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

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR POWER STEERING ECU)

Disconnect the power steering ECU connector.

Fig 18: Identifying E32 Power Steering 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 power steering ECU and CAN No. 1 junction connector are disconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E58-3 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
E58-14 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

Result

RESULT REFERENCE

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

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

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

Fig 19: Identifying E58 CAN No. 1 Junction And E11 DLC3 Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

Disconnect the steering angle sensor connector.

Fig 20: 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 and CAN No. 1 junction connector are disconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E58-5 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
E58-16 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

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

Fig 21: Identifying E58 CAN No. 1 Junction And E11 DLC3 Connectors

OK: REPLACE STEERING ANGLE SENSOR (See REMOVAL )

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR YAW RATE SENSOR)

Disconnect the yaw rate sensor connector.

Fig 22: 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) - E11-4 (CG)	Ignition switch off	200 Ω or higher
E58-17 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

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

Fig 23: Identifying E58 CAN No. 1 Junction And E11 DLC3 Connectors

OK: REPLACE YAW RATE SENSOR (See REMOVAL )

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR MAIN BODY ECU)

Disconnect the main body ECU connector.

Fig 24: 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 and CAN No. 1 junction connector are disconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E58-8 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
E58-19 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

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

Fig 25: Identifying E58 CAN No. 1 Junction And E11 DLC3 Connectors

OK: REPLACE MAIN BODY ECU

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR AIR CONDITIONING AMPLIFIER)

Disconnect the air conditioning amplifier connector.

Fig 26: 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 and CAN No. 1 junction connector are disconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E58-4 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
E58-1S (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

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

Fig 27: Identifying E58 CAN No. 1 Junction And E11 DLC3 Connectors

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

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR CENTER AIRBAG SENSOR ASSEMBLY)

Disconnect the center airbag sensor assembly connector.

Fig 28: 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 and CAN No. 1 junction connector are disconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E58-9 (CANH) - E11-4 (CO)	Ignition switch off	200 Ω or higher
E58-20 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

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

Fig 29: Identifying A47 CAN No. 2 Junction And E11 DLC3 Connectors

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

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR COMBINATION METER)

Disconnect the combination meter connector.

Fig 30: Identifying E46 Combination Meter 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 and CAN No. 1 junction connector are disconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E58-2 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
E58-13 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

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

Fig 31: Identifying E58 CAN No. 1 Junction And E11 DLC3 Connectors

OK: REPLACE COMBINATION METER (See COMBINATION METER )

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR ACCESSORY GATEWAY)

Disconnect the accessory gateway connector from the accessory

Fig 32: Identifying E43 Accessory Gateway 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 CAN No. 1 junction connector is disconnected.

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E58-11 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
E58-22 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

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

Fig 33: Identifying E58 CAN No. 1 Junction And E11 DLC3 Connectors

OK: REPLACE THE ACCESSORY