Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Turn the ignition switch OFF before measuring the resistances of the CAN main wire and the CAN 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 doors need to be opened in order to check 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, which causes resistance variation.

CHECK CAN BUS LINE FOR SHORT TO GND (DLC3 BRANCH WIRE)

Turn the ignition switch OFF.
Disconnect the D41 D-CAN J/C connector.

Fig 1: Checking CAN Bus Lines For Short Circuit (DLC3 Branch Wire)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance.

Result

RESULT CHART

Tester Connection	Condition	Specified Condition	Proceed to
D15-6 (CANH) - D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D15-14(CANL)- D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D15-6 (CANH) - D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG
D15-14(CANL) - D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG

Fig 2: Identifying DLC3 Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DLC3 (CAN-H, CAN-L)

OK: GO TO NEXT STEP

CONNECT CONNECTOR
1. Reconnect the D-CAN J/C connector.

CHECK CAN BUS LINE FOR SHORT TO GND (P-CAN J/C SIDE)

Turn the ignition switch OFF.
Disconnect the D42 P-CAN J/C connector.

Fig 3: Checking CAN Bus Lines For Short Circuit (P-CAN J/C Side)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance.

Result

RESULT CHART

Tester Connection	Condition	Specified Condition	Proceed to
D15-6(CANH)-D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D15-14(CANL)-D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D15-6(CANH)-D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG
D15-14(CANL)-D15-4 (CG)	Ignition switch OFF	Below 1 Ω	NG

Fig 4: Identifying DLC3 Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to step 13

NG: GO TO NEXT STEP

CONNECT CONNECTOR
1. Reconnect the P-CAN J/C connector.

CHECK CAN BUS LINE FOR SHORT TO GND (D-CAN J/C - ECM)

Disconnect the D41 D-CAN J/C connector.

Measure the resistance.

Result

RESULT CHART

Tester Connection	Condition	Specified Condition	Proceed to
D41-4(EFI)-D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D41-15 (EFI) -D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D41-4(EFI)-D15-4{CG)	Ignition switch OFF	Below 1 Ω	NG
D41-15(EFI)-D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG

Fig 5: Checking CAN Bus Line For Short To GND (D-CAN J/C - ECM)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 9

OK: GO TO NEXT STEP

CHECK CAN BUS LINE FOR SHORT TO GND (D-CAN J/C - BRAKE ACTUATOR (SKID CONTROL ECU))

NOTE: For vehicles without ABS, go to step 7.

Measure the resistance.

HINT:

The resistance must be measured after the D41 D-CAN J/C connector is disconnected.

Result

RESULT CHART

Tester Connection	Condition	Specified Condition	Proceed to
D41-1 (ABS) -D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D41-12(ABS)-D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D41-1(ABS)-D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG
D41-12(ABS)-D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG

Fig 6: Checking CAN Bus Line For Short To GND (D-CAN J/C - Brake Actuator (Skid Control ECU))

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 10

OK: GO TO NEXT STEP

CHECK CAN BUS LINE FOR SHORT TO GND (D-CAN J/C - AIR CONDITIONING AMPLIFIER)

NOTE: For vehicles without air conditioning or PTC heater, go to step 8.

Measure the resistance.

HINT:

The resistance must be measured after the D41 D-CAN J/C connector is disconnected.

Result

RESULT CHART

Tester Connection	Condition	Specified Condition	Proceed to
D41-6 (A/C) - D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D41-17(A/C)-D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D41-6 (A/C) - D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG
D41-17 (A/C) -D1S-4(CG)	Ignition switch OFF	Below 1 Ω	NG

Fig 7: Checking CAN Bus Line For Short To GND (D-CAN J/C - Air Conditioning Amplifier)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 11

OK: GO TO NEXT STEP

CHECK CAN BUS LINE FOR SHORT TO GND (D-CAN J/C - CENTER AIRBAG SENSOR ASSEMBLY)

Measure the resistance.

HINT:

The resistance must be measured after the D41 D-CAN J/C connector is disconnected.

Result

RESULT CHART

Tester Connection	Condition	Specified Condition	Proceed to
D41-8(A/B)-D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D41-19(A/B)-D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D41-8(A/B)-D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG
D41-19(A/B)-D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG

Fig 8: Checking CAN Bus Line For Short To GND (D-CAN J/C - Center Airbag Sensor Assembly)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 12

OK: REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (D-CAN J/ C - P-CAN J/C)

CHECK CAN BUS LINE FOR SHORT TO GND (ECM MAIN WIRE)

Disconnect the A21 ECM connector.

Fig 9: Checking CAN Bus Lines For Short Circuit (ECM Main Wire)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance.

HINT:

The resistance must be measured after the D41 D-CAN J/C connector is disconnected.

Result

RESULT CHART

Tester Connection	Condition	Specified Condition	Proceed to
D41-4(EFI)-D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D41-15(EFI)-D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D41-4(EFI)-D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG
D41-15(EFI)-D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG

Fig 10: Checking CAN Bus Line For Short To GND (D-CAN J/C - ECM)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE ECM

NG: REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (D-CAN J/C - ECM (CAN-H, CAN-L))

CHECK CAN BUS LINE FOR SHORT TO GND (BRAKE ACTUATOR (SKID CONTROL ECU) BRANCH WIRE)

Disconnect the A15 brake actuator (skid control ECU) connector.

Fig 11: Checking CAN Bus Lines For Short Circuit
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance.

HINT:

The resistance must be measured after the D41 D-CAN J/C connector is disconnected.

Result

RESULT CHART

Tester Connection	Condition	Specified Condition	Proceed to
D41-1 (ABS)-D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D41-12(ABS)-D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D41-1(ABS)-D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG
D41-12(ABS)-D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG

Fig 12: Checking CAN Bus Line For Short To GND (D-CAN J/C - Brake Actuator (Skid Control ECU))

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE BRAKE ACTUATOR (SKID CONTROL ECU)

NG: REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO BRAKE ACTUATOR (D-CAN J/C - BRAKE ACTUATOR (SKID CONTROL ECU) (CAN-H, CAN-L))

CHECK CAN BUS LINE FOR SHORT TO GND (AIR CONDITIONING AMPLIFIER)

Disconnect the E8 air conditioning amplifier connector.

Fig 13: Checking CAN Bus Lines For Short Circuit
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance.

HINT:

The resistance must be measured after the D41 D-CAN J/C connector is disconnected.

Result

RESULT CHART

Tester Connection	Condition	Specified Condition	Proceed to
D41-6 (A/C) -D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D41-17 (A/C) -D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D41-6(A/C)-D15-4 (CG)	Ignition switch OFF	Below 1 Ω	NG
D41-17 (A/C) -D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG

Fig 14: Checking CAN Bus Line For Short To GND (D-CAN J/C - Air Conditioning Amplifier)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE AIR CONDITIONING AMPLIFIER

NG: REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO AIR CONDITIONING AMPLIFIER (D-CAN J/C - AIR CONDITIONING AMPLIFIER (CAN-H, CAN-L))

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

Disconnect the D16 center airbag sensor assembly connector.

Fig 15: Checking CAN Bus Lines For Short Circuit (Center Airbag Sensor Assembly Branch Wire)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance.

HINT:

The resistance must be measured after the D41 D-CAN J/C connector is disconnected.

Result

RESULT CHART

Tester Connection	Condition	Specified Condition	Proceed to
D41-8(A/B)-D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D41-19(A/B)-D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D41-8(A/B)-D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG
D41-19(A/B)-D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG

Fig 16: Checking CAN Bus Line For Short To GND (D-CAN J/C - Center Airbag Sensor Assembly)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE CENTER AIRBAG SENSOR ASSEMBLY

NG: REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO CENTER AIRBAG SENSOR ASSEMBLY (D-CAN J/C - CENTER AIRBAG SENSOR ASSEMBLY (CAN-H, CAN-L))

CHECK CAN BUS LINE FOR SHORT TO GND (P-CAN J/C - POWER STEERING ECU)

Measure the resistance.

HINT:

The resistance must be measured after the D42 P-CAN J/C connector is disconnected.

Result

RESULT CHART

Tester Connection	Condition	Specified Condition	Proceed to
D42-4 (EPS) -D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D42-15(EPS)-D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D42-4 (EPS) -D15-4 (CG)	Ignition switch OFF	Below 1 Ω	NG
D42-15(EPS)-D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG

Fig 17: Checking CAN Bus Line For Short To GND (P-CAN J/C - Power Steering ECU)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 16

OK: GO TO NEXT STEP

CHECK CAN BUS LINE FOR SHORT TO GND (P-CAN J/C - MAIN BODY ECU)

Measure the resistance.

HINT:

The resistance must be measured after the D42 P-CAN J/C connector is disconnected.

Result

RESULT CHART

Tester Connection	Condition	Specified Condition	Proceed to
D42-5(J/B)-D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D41-16 (J/B) -D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D42-5(J/B)-D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG
D41-16(J/B)-D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG

Fig 18: Checking CAN Bus Line For Short To GND (P-CAN J/C - Main Body ECU)

NG: Go to step 17

OK: GO TO NEXT STEP

CHECK CAN BUS LINE FOR SHORT TO GND (P-CAN J/C - COMBINATION METER ECU)

Measure the resistance.

HINT:

The resistance must be measured after the D42 P-CAN J/C connector is disconnected.

Result

RESULT CHART

Tester Connection	Condition	Specified Condition	Proceed to
D42-7 (MET) -D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D41-18(MET)-D15-4 (CG)	Ignition switch OFF	1 Ω or higher	OK
D42-7 (MET) -D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG
D41-18(MET)-D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG

Fig 19: Identifying D42 P-CAN J/C Connector

NG: Go to step 18

OK: REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (D-CAN J/C - P-CAN J/C (CAN-H, CAN-L))

CHECK CAN BUS LINE FOR SHORT TO GND (POWER STEERING ECU MAIN WIRE)

Disconnect the D31 power steering ECU connector.

Fig 20: Checking CAN Bus Lines For Short Circuit (Power Steering ECU Main Wire)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance.

HINT:

The resistance must be measured after the D42 P-CAN J/C connector is disconnected.

Result

RESULT CHART

Tester Connection	Condition	Specified Condition	Proceed to
D42-4 (EPS) -D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D42-15(EPS)-D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D424 (EPS) -D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG
D42-15(EPS)-D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG

Fig 21: Checking CAN Bus Line For Short To GND (P-CAN J/C - Power Steering ECU)

OK: REPLACE POWER STEERING ECU

NG: REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO POWER STEERING ECU (P-CAN J/C - POWER STEERING ECU (CAN-H, CAN-L))

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

Disconnect the D33 main body ECU connector.

Fig 22: Checking CAN Bus Lines For Short Circuit (Main Body ECU Branch Wire)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance.

HINT:

The resistance must be measured after the D42 P-CAN J/C connector is disconnected.

Result

RESULT CHART

Tester Connection	Condition	Specified Condition	Proceed to
D42-5(J/B)-D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D41-16(J/B)-D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D42-5(J/B)-D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG
D41-16(J/B)-D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG

Fig 23: Checking CAN Bus Line For Short To GND (P-CAN J/C - Main Body ECU)

OK: REPLACE MAIN BODY ECU

NG: REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO MAIN BODY ECU (P-CAN J/C - MAIN BODY ECU (CAN-H, CAN-L))

CHECK CAN BUS LINE FOR SHORT TO GND (COMBINATION METER ECU BRANCH WIRE)

Disconnect the D1 combination meter ECU connector.

Fig 24: Checking CAN Bus Lines For Short Circuit (Combination Meter ECU Branch Wire)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance.

HINT:

The resistance must be measured after the D42 P-CAN J/C connector is disconnected.

Result

RESULT CHART

Tester Connection	Condition	Specified Condition	Proceed to
D42-7 (MET) -D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D41-18(MET)-D15-4(CG)	Ignition switch OFF	1 Ω or higher	OK
D42-7 (MET) -D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG
D41-18(MET)-D15-4(CG)	Ignition switch OFF	Below 1 Ω	NG

Fig 25: Identifying D42 P-CAN J/C Connector

OK: REPLACE COMBINATION METER ECU

NG: REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO COMBINATION METER ECU (P-CAN J/C - COMBINATION METER ECU (CAN-H, CAN-L))