Back-up Light Circuit [02/2019 - 06/2020]: Procedure
WARNING: This page is about a different car, the 2021 Toyota RAV4, 2020 Toyota RAV4, and 2019 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK FOR DTC
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
- Check for DTCs.
Powertrain > Hybrid Control > Trouble Codes
Result
Result Proceed to Hybrid control system DTCs are not output A Hybrid control system DTCs are output B
Result:
B
GO TO HYBRID CONTROL SYSTEM
Refer to DIAGNOSTIC TROUBLE CODE CHART [02/2019 - 06/2020]
Result:
A
See step 2
- CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BODY GROUND)
- Disconnect the instrument panel junction block assembly connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition 4D-3 - Body ground Always Below 1 Ω *a Front view of wire harness connector
(Instrument Panel Junction Block Assembly)Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 3
- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
- Disconnect the 4F instrument panel junction block assembly connector.
- Disconnect the A29 hybrid vehicle control ECU assembly connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition A29-20 (BL) - 4F-19 Always Below 1 Ω A29-20 (BL) or 4F-19 - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 4
- CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (OUTPUT VOLTAGE)
*a Component with harness connected
(Instrument Panel Junction Block Assembly)- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition 4F-19 - Body ground Power switch on (IG), shift lever not in R Below 1 V 4F-19 - Body ground Power switch on (IG), shift lever in R 11 to 14 V Result
Proceed to OK NG
Result:
NG
REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY
Refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020]
Result:
OK
See step 5
- Measure the voltage according to the value(s) in the table below.
- INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (OUTPUT VOLTAGE)
*a Component with harness connected
(Instrument Panel Junction Block Assembly)- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition 4H-10 - Body ground Power switch on (IG), shift lever not in R Below 1 V 4H-10 - Body ground Power switch on (IG), shift lever in R 11 to 14 V Result
Proceed to OK NG
Result:
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
NG
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
Refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020]
- Measure the voltage according to the value(s) in the table below.