| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001EKLH |
| Model Year Start: 2019 | Model: RAV4 HV | Prod Date Range: [11/2018 - 08/2020] |
| Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for 2WD with NICKEL METAL HYDRIDE BATTERY): ECU Power Source Circuit; 2019 - 2020 MY RAV4 HV [11/2018 - 08/2020] | ||
|
ECU Power Source Circuit |
DESCRIPTION
If the power switch is on (IG), the hybrid vehicle control ECU assembly applies current to the MREL terminal to turn the IGCT relay on. This supplies power to the +B1 and +B2 terminals.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.
Click here
![2019 - 2024 MY RAV4 RAV4 HV [11/2018 - ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION](/t3Portal/stylegraphics/info.gif)
PROCEDURE
|
1. |
CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (+B1, +B2 VOLTAGE) |
(a) Turn the power switch on (IG).
(b) Measure the voltage according to the value(s) in the table below.
|
*a |
Component with harness connected (Hybrid Vehicle Control ECU Assembly) |
- |
- |
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A29-11 (+B1) - Body ground |
Power switch on (IG) |
11 to 14 V |
|
A30-1 (+B2) - Body ground |
Power switch on (IG) |
11 to 14 V |
(c) Turn the power switch off.
| NG |
|
|
|
2. |
CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - BODY GROUND) |
(a) Disconnect the A30 and A31 hybrid vehicle control ECU assembly connectors.
(b) Measure the resistance according to the value(s) in the table below.
|
*a |
Front view of wire harness connector (to Hybrid Vehicle Control ECU Assembly) |
- |
- |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A30-3 (E1) - Body ground |
Always |
Below 1 Ω |
|
A31-12 (E01) - Body ground |
Always |
Below 1 Ω |
|
A31-11 (E02) - Body ground |
Always |
Below 1 Ω |
|
A31-34 (E12) - Body ground |
Always |
Below 1 Ω |
(c) Reconnect the A30 and A31 hybrid vehicle control ECU assembly connectors.
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (MREL VOLTAGE) |
(a) Turn the power switch on (IG).
(b) Measure the voltage according to the value(s) in the table below.
|
*a |
Component with harness connected (Hybrid Vehicle Control ECU Assembly) |
- |
- |
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A29-5 (MREL) - Body ground |
Power switch on (IG) |
11 to 14 V |
(c) Turn the power switch off.
| NG |
|
REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY
|
|
|
4. |
CHECK FUSE (IGCT NO. 2) |
|
(a) Remove the IGCT NO. 2 fuse from the No. 3 relay block and junction block assembly. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
IGCT NO. 2 fuse terminals |
Always |
Below 1 Ω |
(c) Install the IGCT NO. 2 fuse.
| NG |
|
|
|
5. |
CHECK FUSE (IGCT) |
|
(a) Remove the IGCT fuse from the No. 3 relay block and junction block assembly. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
IGCT fuse terminals |
Always |
Below 1 Ω |
(c) Install the IGCT fuse.
| NG |
|
|
|
6. |
INSPECT RELAY (IGCT) |
|
(a) Remove the IGCT relay from the No. 3 relay block and junction block assembly. |
|
|
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(c) Install the IGCT relay.
| NG |
|
REPLACE RELAY (IGCT) |
|
|
7. |
CHECK HARNESS AND CONNECTOR (NO. 3 RELAY BLOCK AND JUNCTION BLOCK ASSEMBLY - HYBRID VEHICLE CONTROL ECU ASSEMBLY) |
(a) Disconnect the A29 and A30 hybrid vehicle control ECU assembly connectors.
(b) Remove the IGCT NO. 2 fuse from the No. 3 relay block and junction block assembly.
(c) Measure the resistance according to the value(s) in the table below.
|
*1 |
No. 3 Relay Block and Junction Block Assembly |
*2 |
IGCT NO. 2 Fuse |
|
*a |
Front view of wire harness connector (to Hybrid Vehicle Control ECU Assembly) |
- |
- |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A29-11 (+B1) - 2 (IGCT NO. 2 fuse terminal) |
Always |
Below 1 Ω |
|
A30-1 (+B2) - 2 (IGCT NO. 2 fuse terminal) |
Always |
Below 1 Ω |
(d) Reconnect the A29 and A30 hybrid vehicle control ECU assembly connectors.
(e) Install the IGCT NO. 2 fuse.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
8. |
CHECK HARNESS AND CONNECTOR (NO. 3 RELAY BLOCK AND JUNCTION BLOCK ASSEMBLY) |
(a) Disconnect the IGCT fuse, IGCT NO. 2 fuse and IGCT relay from the No. 3 relay block and junction block assembly.
(b) Measure the resistance according to the value(s) in the table below.
|
*1 |
No. 3 Relay Block and Junction Block Assembly |
*2 |
IGCT NO. 2 Fuse |
|
*3 |
IGCT Relay |
*4 |
IGCT Fuse |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
3 (IGCT relay) - 2 (IGCT fuse terminal) |
Always |
Below 1 Ω |
|
5 (IGCT relay) - 1 (IGCT NO. 2 fuse terminal) |
Always |
Below 1 Ω |
(c) Install the IGCT fuse, IGCT NO. 2 fuse and IGCT relay.
| NG |
|
REPLACE FUSE HOLDER |
|
|
9. |
CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - NO. 3 RELAY BLOCK AND JUNCTION BLOCK ASSEMBLY) |
(a) Disconnect the A29 hybrid vehicle control ECU assembly connector.
(b) Remove the IGCT relay from the No. 3 relay block and junction block assembly.
(c) Measure the resistance according to the value(s) in the table below.
|
*1 |
No. 3 Relay Block and Junction Block Assembly |
*2 |
IGCT Relay |
|
*a |
Front view of wire harness connector (to Hybrid Vehicle Control ECU Assembly) |
- |
- |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A29-5 (MREL) - 1 (IGCT relay) |
Always |
Below 1 Ω |
|
A29-5 (MREL) or 1 (IGCT relay) - Body ground and other terminals |
Always |
10 kΩ or higher |
(d) Install the IGCT relay.
(e) Reconnect the A29 hybrid vehicle control ECU assembly connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
10. |
CHECK HARNESS AND CONNECTOR (NO. 3 RELAY BLOCK AND JUNCTION BLOCK ASSEMBLY - BODY GROUND) |
(a) Remove the IGCT relay from the No. 3 relay block and junction block assembly
|
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(c) Install the IGCT relay.
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
11. |
CHECK HARNESS AND CONNECTOR (NO. 3 RELAY BLOCK AND JUNCTION BLOCK ASSEMBLY - HYBRID VEHICLE CONTROL ECU ASSEMBLY) |
(a) Remove the IGCT NO. 2 fuse from the No. 3 relay block and junction block assembly.
(b) Disconnect the A29 and A30 hybrid vehicle control ECU assembly connectors.
(c) Measure the resistance according to the value(s) in the table below.
|
*1 |
No. 3 Relay Block and Junction Block Assembly |
*2 |
IGCT No. 2 Fuse |
|
*a |
Front view of wire harness connector (to Hybrid Vehicle Control ECU Assembly) |
- |
- |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A29-11 (+B1) or 2 (IGCT No. 2 fuse terminal) - Body ground and other terminals |
Always |
10 kΩ or higher |
|
A30-1 (+B2) or 2 (IGCT No. 2 fuse terminal) - Body ground and other terminals |
Always |
10 kΩ or higher |
(d) Reconnect the A29 and A30 hybrid vehicle control ECU assembly connectors.
(e) Install the IGCT No. 2 fuse.
| OK |
|
REPLACE FUSE (IGCT NO. 2) |
| NG |
|
|
12. |
CHECK HARNESS AND CONNECTOR (NO. 3 RELAY BLOCK AND JUNCTION BLOCK ASSEMBLY) |
(a) Disconnect the IGCT fuse, IGCT NO. 2 fuse and IGCT relay from the No. 3 relay block and junction block assembly.
(b) Measure the resistance according to the value(s) in the table below.
|
*1 |
No. 3 Relay Block and Junction Block Assembly |
*2 |
IGCT NO. 2 Fuse |
|
*3 |
IGCT Relay |
*4 |
IGCT Fuse |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
3 (IGCT relay) or 2 (IGCT fuse terminal) - Body ground and other terminals |
Always |
10 kΩ or higher |
|
5 (IGCT relay) or 1 (IGCT No. 2 fuse terminal) - Body ground and other terminals |
Always |
10 kΩ or higher |
(c) Install the IGCT fuse, IGCT NO. 2 fuse and IGCT relay.
| OK |
|
REPLACE FUSE (IGCT) |
| NG |
|
|
13. |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
| NEXT |
|
REPLACE FUSE (IGCT NO. 2) |
|
14. |
REPLACE FUSE HOLDER |
| NEXT |
|
REPLACE FUSE (IGCT) |
|
|