DESCRIPTION
This is the power source circuit to operate the radio and display receiver assembly.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
| 1. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY POWER SOURCE) |
(a) Disconnect the G3 and G2 radio and display receiver assembly connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
G3-1 (GND1) - Body ground |
Always | Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
G3-4 (+B1) - G3-1 (GND1) |
Power switch off | 11 to 14 V |
|
G3-15 (ACC1) - G3-1 (GND1) |
Power switch on (ACC) |
11 to 14 V |
|
G2-19 (IG) - G3-1 (GND1) |
Power switch on (IG) |
11 to 14 V |
| OK |  | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
PROCEDURE
|
1. | DELETE OPERATION |
(a) Check if a registered portable player can be deleted normally.
OK:
Registered portable player can be deleted normally.
| OK |  | END |
| NG | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
DESCRIPTION
The radio and display receiver assembly receives a reverse signal from the BKUP LP relay.
WIRING DIAGRAM
PROCEDURE
| 1. |
CHECK BACK-UP LIGHT |
(a) Move the shift lever to R and check if the back-up lights come on.
OK:
The back-up lights come on.
| NG |  | GO TO LIGHTING SYSTEM |
|
| 2. |
CHECK HARNESS AND CONNECTOR (REVERSE SIGNAL) |
(a) Disconnect the G3 radio and display receiver assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
G3-28 (REV) - Body ground |
Power switch on (IG) Shift lever in R |
11 to 14 V |
|
G3-28 (REV) - Body ground |
Power switch on (IG) Shift lever not in R |
Below 1 V |
| OK | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Hybrid Control System: Hybrid/EV Battery Negative Contactor Actuator Stuck Closed (P0AA373)
DTC SUMMARY MALFUNCTION DESCRIPTION The hybrid vehicle control ECU detects a stuck closed malfunction of a system main relay on the HV battery negative side. The cause of this malfunction may be one of the following: Inverter voltage sensor (VH) internal circuit malfunction Voltage sensor (VH) malfu ...
