DTC C13A2/22: Engine / Power Switch Malfunction: Procedure

1. Turn the engine switch off.
2. Connect the Techstream to the DLC3.
3. Turn the engine switch on (IG) and the Techstream on.
4. Enter the following menus: Chassis / Electric Parking Brake / Data List.
5. Check the values by referring to the table below.
   ELECTRIC PARKING BRAKE
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   IG Status	Engine switch information display/ ON or OFF	ON: Engine switch on (IG) OFF: Engine switch is on (ACC) or off	IG circuit
   IG Switch	IG power source information display/ ON or OFF	ON: IG power source is input into electric parking brake ECU OFF: IG power source is not input into electric parking brake ECU	IG circuit

   OK

   On the Techstream screen, item changes between ON and OFF according to switch operation.

NG → See step   3 

OK: Go to next step 

1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Check for DTC.

   Result

   Result	Proceed to
   C13A2/22 is output	A
   DTC is not output	B

B → See step   9 

A → See step   11 

1. Remove the RR-IG1-1 fuse from the luggage room junction block.
2. Remove the D-IG1-3 fuse from the main body ECU.
3. Measure the resistance of the fuse.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   RR-IG1-1 fuse	Always	Below 1 Ω
   D-IG1-3 fuse	Always	Below 1 Ω

NG → CHECK FOR SHORT IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE 

OK: Go to next step 

Fig 1: Identifying RR-IG1-1 Fuse From Luggage Room Junction Block

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the S46 and S48 ECU connectors.
2. Disconnect the LA luggage room junction block connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   S48-4 (IG) - LA-21	Always	Below 1 Ω
   S48-4 (IG) - Body ground	Always	10 kΩ or higher
   S46-3 (GND1) - Body ground	Always	Below 1 Ω
   LA-43 - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the S48 ECU connector.
2. Measure the voltage according to the value(s) in the table below.
   Fig 2: Identifying S48 ECU Connector Terminal IG

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   S48-4 (IG) - Body ground	Engine switch on (IG)	11 to 14 V

   RESULT
   
   

   Result	Proceed to
   NG	A
   OK	B

B → See step   11 

A: Go to next step 

1. Disconnect the LG luggage room junction block connector.
2. Measure the voltage according to the value(s) in the table below.
   Fig 3: Identifying LG Luggage Room Junction Block Harness Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard voltage

   Tester Connection	Condition	Specified Condition
   LG-1 - Body ground	Always	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the LD luggage room junction block connector.
2. Measure the voltage according to the value(s) in the table below.
   Fig 4: Identifying LD Luggage Room Junction Block Harness Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   LD-24 - Body ground	Engine switch on (IG)	11 to 14 V

   RESULT
   
   

   Result	Proceed to
   NG	A
   OK	B

B → REPLACE LUGGAGE ROOM JUNCTION BLOCK ASSEMBLY 

A: Go to next step 

Fig 5: Identifying Luggage Room Junction Block And Main Body ECU Harness Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the LD luggage room junction block connector.
2. Disconnect the DD main body ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   LD-24 - DD-23	Always	Below 1 Ω
   LD-24 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   10