Ignition Circuit [11/2018 - 08/2020]: Procedure
WARNING: This page is about a different car, the 2020 Toyota RAV4 and 2019 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK TERMINAL VOLTAGE (POWER SOURCE OF IGNITION COIL ASSEMBLY)
*a Front view of wire harness connector
(to Ignition Coil Assembly)- Disconnect the ignition coil assembly connectors.
- Turn the power switch on (IG).
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition C1-1 (+B) - C1-3 (GND) Power switch on (IG) 11 to 14 V C2-1 (+B) - C2-3 (GND) Power switch on (IG) 11 to 14 V C3-1 (+B) - C3-3 (GND) Power switch on (IG) 11 to 14 V C4-1 (+B) - C4-3 (GND) Power switch on (IG) 11 to 14 V Result
Proceed to OK NG
Result:
NG
See step 3
Result:
OK
See step 2
- CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM)
- Disconnect the ignition coil assembly connectors.
- Disconnect the ECM connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition C1-2 (IGT1) - C45-49 (IGT1) Always Below 1 Ω C2-2 (IGT2) - C45-48 (IGT2) Always Below 1 Ω C3-2 (IGT3) - C45-47 (IGT3) Always Below 1 Ω C4-2 (IGT4) - C45-46 (IGT4) Always Below 1 Ω C1-2 (IGT1) or C45-49 (IGT1) - Body ground and other terminals Always 10 kΩ or higher C2-2 (IGT2) or C45-48 (IGT2) - Body ground and other terminals Always 10 kΩ or higher C3-2 (IGT3) or C45-47 (IGT3) - Body ground and other terminals Always 10 kΩ or higher C4-2 (IGT4) or C45-46 (IGT4) - Body ground and other terminals Always 10 kΩ or higher Result
Proceed to OK NG
Result:
OK
REPLACE ECM. Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 08/2020]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
- CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - BODY GROUND)
- Disconnect the ignition coil assembly connectors.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition C1-3 (GND) - Body ground Always Below 1 Ω C2-3 (GND) - Body ground Always Below 1 Ω C3-3 (GND) - Body ground Always Below 1 Ω C4-3 (GND) - Body ground Always Below 1 Ω Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 4
- CHECK HARNESS AND CONNECTOR (IG2 NO. 1 RELAY - IGNITION COIL ASSEMBLY)
- Disconnect the IG2 NO. 1 relay from No. 1 engine room relay block and No. 1 junction block assembly.
- Disconnect the ignition coil assembly connectors.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition 3 (IG2 NO. 1 relay) - C1-1 (+B) Always Below 1 Ω 3 (IG2 NO. 1 relay) - C2-1 (+B) Always Below 1 Ω 3 (IG2 NO. 1 relay) - C3-1 (+B) Always Below 1 Ω 3 (IG2 NO. 1 relay) - C4-1 (+B) Always Below 1 Ω 3 (IG2 NO. 1 relay) or C1-1 (+B) - Body ground and other terminals Always 10 kΩ or higher 3 (IG2 NO. 1 relay) or C2-1 (+B) - Body ground and other terminals Always 10 kΩ or higher 3 (IG2 NO. 1 relay) or C3-1 (+B) - Body ground and other terminals Always 10 kΩ or higher 3 (IG2 NO. 1 relay) or C4-1 (+B) - Body ground and other terminals Always 10 kΩ or higher Result
Proceed to OK NG
Result:
OK
GO TO ECM POWER SOURCE CIRCUIT. Refer to ECM Power Source Circuit [11/2018 - 08/2020]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR