DTC P3137-348: Collision Sensor Low Input; DTC P3138-349: Collision Sensor High Input: Procedure

1. Disconnect the A63 circuit breaker sensor No. 1 connector.
2. Turn the power switch on (IG).
   Fig 1: Identifying A63 Circuit Breaker Sensor No. 1 Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection	Specified Condition
   SIF+ (A63-2) - SIF- (A63-1)	4.5 to 5.5 V

NG → See step   5 

OK: Go to next step 

1. Turn the power switch off.
2. Disconnect the A63 circuit breaker sensor No. 1 connector.
3. Measure the resistance according to the value(s) in the table below.
   Fig 2: Identifying A63 Circuit Breaker Sensor No. 1 Connector Terminal Identification (Component Side)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance

   Tester Connection	Specified Condition
   SIF- (A63-1) - SIF+ (A63-2)	0.65 to 1.0 kΩ at 20°C (68°F)
   SIF- (A63-1) - Body ground	100 kΩ or more
   SIF+ (A63-2) - Body ground	100 kΩ or more

NG → REPLACE CIRCUIT BREAKER SENSOR NO. 1 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
4. Clear DTCs and freeze frame data.

NEXT: Go to next step 

1. Turn the power switch on (IG).
2. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
3. Check if DTCs are output.

   Result

   P3137-348 and P3138-349 are output.

NO → See step   7 

YES → See step   6 

1. Disconnect the A63 circuit breaker sensor No. 1 connector.
   Fig 3: Identifying A63 Circuit Breaker Sensor No. 1 And A61 Hybrid Vehicle Control ECU Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the A61 hybrid vehicle control ECU connector.
3. Turn the power switch on (IG).
4. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection	Specified Condition
   AS1 (A61-62) - Body ground	Below 1 V
   AS1G (A61-61) - Body ground	Below 1 V

   NOTE:

   Turning the power switch on (IG) with the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

5. Turn the power switch off.
6. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for open)

   Tester Connection	Specified Condition
   AS1 (A61-62) - SIF+ (A63-2)	Below 1 Ω
   AS1G (A61-61) - SIF- (A63-1)	Below 1 Ω

   Standard resistance (Check for short)

   Tester Connection	Specified Condition
   AS1 (A61-62) or SIF+ (A63-2) - Body ground	10 kΩ or more
   AS1G (A61-61) or SIF- (A63-1) - Body ground	10 kΩ or more

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   6