Inspection Procedure

NOTICE:

• 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 WIRE (MAIN WIRE FOR DISCONNECTION, BUS LINES FOR SHORT CIRCUIT)

Toyota Standard Operating Procedure

(a) Turn the ignition switch OFF.

(b) Measure the resistance. Standard resistance

Tester Connection

Condition

Specified Condition

Proceed to

D15-6 (CANH) -D15-14 (CANL)

Ignition switch OFF

54 to 69 Q

OK

D15-6 (CANH) -D15-14 (CANL)

Ignition switch OFF

69 Q or higher

NG-A

D15-6 (CANH) -D15-14 (CANL)

Ignition switch OFF

54 Q or less

CHECK CAN MAIN WIRE (FOR OPEN CIRCUIT)

CHECK CAN BUS WIRE (FOR SHORT CIRCUIT)

CHECK CAN BUS WIRE (FOR SHORT TO +B)

Ignition Switch Toyota Yaris Wiring

(a) Turn the ignition switch OFF.

(b) Measure the resistance. Result

Tester Connection

Condition

Specified Condition

Proceed to

D15-6 (CANH) -D15-16 (BAT)

Ignition switch OFF

1 Q or higher

OK

D15-14 (CANL) -D15-16 (BAT)

Ignition switch OFF

1 Q or higher

OK

D15-6 (CANH) -D15-16 (BAT)

Ignition switch OFF

Below 1 Q

NG

D15-14 (CANL) -D15-16 (BAT)

Ignition switch OFF

Below 1 Q

NG

CHECK CAN BUS WIRE (FOR SHORT TO +B)

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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