Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Diagnosis System

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / Hybrid / Battery Control / Hybrid Control System / Diagnosis System

DIAGNOSIS SYSTEM

DESCRIPTION

(a) The hybrid vehicle control ECU has a self-diagnosis system. If the computer, hybrid control system, or a component is not working properly, the ECU records the conditions that relate to the fault. The ECU also illuminates the master warning light in the combination meter assembly and provides other appropriate messages on the multi-information display, such as the HV system warning message, HV battery warning message, or discharge warning message.

*a	MIL	*b	READY Light
*c	Master Warning Light	*d	Multi-information Display
*e	Charge Warning	-	-

HINT:

The master warning light will illuminate when the hybrid control system is malfunctioning and the light will blink when in inspection mode.

When troubleshooting OBD II (On-Board Diagnostics) vehicles, the Techstream (complying with SAE J1978) must be connected to the DLC3 (Data Link Connector 3) of the vehicle. Various data in the vehicle ECM (Engine Control Module) can then be read.
OBD II regulations require that the vehicle's on-board computer illuminates the MIL (Malfunction Indicator Lamp) on the instrument panel when the computer detects a malfunction in:
1. The emission control system components.
2. The powertrain control components (which affect vehicle emissions).
3. The computer itself.
  In addition, the applicable DTCs prescribed by SAE J2012 are recorded in the hybrid vehicle control ECU memory. If the malfunction does not recur in 3 consecutive trips, the MIL turns off automatically but the DTCs remain recorded in the hybrid vehicle control ECU memory.
To check for DTCs, connect the Techstream to the DLC3. The Techstream displays DTCs, freeze frame data, and a variety of hybrid control system data. The DTCs and freeze frame data can be cleared with the Techstream. In order to enhance the OBD function on vehicles and develop the off-board diagnosis system, Controller Area Network (CAN) communication is used in this system. CAN is a network which uses a pair of data transmission lines spanning multiple computers and sensors. It allows for high speed communications between the systems and simplification of the wire harness connections.

2 TRIP DETECTION LOGIC

Following is the description for storage of DTC using "2 trip detection logic".

When a malfunction is first detected, the malfunction is temporarily stored in the hybrid vehicle control ECU memory (1st trip). If the same malfunction is detected during the next drive cycle, the MIL is illuminated (2nd trip).

FREEZE FRAME DATA

The hybrid vehicle control ECU records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was moving or stationary, whether the engine was warmed up or not, as well as other data recorded at the time of a malfunction.

AUXILIARY BATTERY VOLTAGE

Standard Voltage:

Switch Condition	Specified Condition
Power switch on (IG)	11 to 14 V

If voltage is below 11 V, recharge or replace the auxiliary battery.
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

MIL (Malfunction Indicator Lamp)

(a) The MIL is illuminated when the power switch is first turned on (IG), before the READY light comes on.

(b) When the READY indicator turns on, the MIL should turn off. If the MIL remains illuminated, the diagnosis system has detected a malfunction or abnormality in the system.

HINT:

If the MIL is not illuminated when the power switch is first turned on (IG), check the MIL circuit.

for SFI System: Click here

RELEVANT SYSTEMS CHECK

The inspection areas and outline of the inspection for each circuit are listed below.

Inspection Details of Relevant Systems

System to be Inspected	Malfunction Possibility	Inspection Content
Motor Resolver Circuit	Motor resolver signal	Open or short circuit in the motor resolver, connectors or cables
Motor High-voltage Circuit	Motor (MG2) output	Open or short circuit in the motor (MG2), connectors or cables
Generator Resolver Circuit	Generator resolver signal	Open or short circuit in the generator resolver, connectors or cables
Generator High-voltage Circuit	Generator (MG1) output	Open or short circuit in the generator (MG1), connectors or cables
Inverter Low-voltage Circuit	Power supply voltage from +B or communication between hybrid vehicle control ECU and motor generator control ECU	Open or short circuit in communication line between hybrid vehicle control ECU and motor generator control ECU Open or short circuit in the +B or ground lines Fuse is blown
HV Battery High-voltage Line Circuit	High voltage power supply from HV battery	Open or short circuit in the system main relay, connectors or cables
Cooling System	Temperature abnormally high	Grille blockage Whether coolant is present Whether there is a possibility that coolant was frozen when malfunction occurs Cooling hose blockage HV radiator fan operation
Shutdown Signal Circuit	Shutdown signal	Open or short circuit in shutdown signal communication line between hybrid vehicle control ECU and motor generator ECU

DTC PRIORITY LEVEL AND TROUBLE AREAS

Each DTC diagnostic procedure for the hybrid control system consists of a combination of the various relevant system (circuit) inspections.
When multiple DTCs are output, performing each diagnostic procedure in order of priority can lead to a more accurate diagnosis.

Inspection Details of Relevant Systems

DTC No.	Detection Item	Order of Priority					Inspection Pattern
		1	2	3	4	5
		Microcomputer Malfunction	Power Source Circuit Malfunction	Communication System Malfunction	Sensor and Actuator Circuit Malfunction	System Malfunction
P056014	System Voltage (BATT) Circuit Short to Ground or Open	-	○	-	-	-	-
P060647	Hybrid/EV Powertrain Control Module Processor Watchdog / Safety MCU Failure	○	-	-	-	-	-
P060687	Hybrid/EV Powertrain Control Module Processor to Monitoring Processor Missing Message	○	-	-	-	-	-
P060694	Hybrid/EV Powertrain Control Module Processor Unexpected Operation	○	-	-	-	-	-
P060A29	Hybrid/EV Powertrain Control Module Monitoring Processor Signal Invalid	○	-	-	-	-	-
P060A44	Hybrid/EV Powertrain Control Module Monitoring Processor Data Memory Failure	○	-	-	-	-	-
P060A45	Hybrid/EV Powertrain Control Module Monitoring Processor Program Memory Failure	○	-	-	-	-	-
P060A47	Hybrid/EV Powertrain Control Module Monitoring Processor Watchdog / Safety MCU Failure	○	-	-	-	-	-
P060A49	Hybrid/EV Powertrain Control Module Monitoring Processor Internal Electronic Failure	○	-	-	-	-	-
P060A87	Hybrid/EV Powertrain Control Module Processor from Monitoring Processor Missing Message	○	-	-	-	-	-
P060A94	Hybrid/EV Powertrain Control Module Monitoring Processor Unexpected Operation	○	-	-	-	-	-
P060B1C	Hybrid/EV Powertrain Control Module A/D Processing Voltage Out of Range	○	-	-	-	-	-
P060B49	Hybrid/EV Powertrain Control Module A/D Processing Internal Electronic Failure	○	-	-	-	-	-
P060B71	Hybrid/EV Powertrain Control Module A/D Processing Actuator Stuck	○	-	-	-	-	-
P062F44	Hybrid/EV Powertrain Control Module EEPROM Data Memory Failure	○	-	-	-	-	-
P062F46	Hybrid/EV Powertrain Control Module EEPROM Calibration / Parameter Memory Failure	○	-	-	-	-	-
P06881F	ECM/PCM Power Relay Sense Circuit Intermittent	-	○	-	-	-	-
P070562	Transmission Range Sensor "A" Circuit (PRNDL Input) Signal Compare Failure	-	-	-	○	-	-
P0A0A13	High Voltage System Interlock Circuit Open	-	-	-	-	○	-
P0A0A92	High Voltage System Interlock Performance or Incorrect Operation	-	-	-	-	○	-
P0A1B49	Drive Motor "A" Control Module Internal Electronic Failure	○	-	-	-	-	-
P0A1B94	Drive Motor "A" Control Module Unexpected Operation	○	-	-	-	-	-
P0A2A11	Drive Motor "A" Temperature Sensor Circuit Short to Ground	-	-	-	○	-	-
P0A2A15	Drive Motor "A" Temperature Sensor Circuit Short to Auxiliary Battery or Open	-	-	-	○	-	-
P0A2A1C	Drive Motor "A" Temperature Sensor Voltage Out of Range	-	-	-	○	-	-
P0A2A1F	Drive Motor "A" Temperature Sensor Circuit Intermittent	-	-	-	○	-	-
P0A3611	Generator Temperature Sensor Circuit Short to Ground	-	-	-	○	-	-
P0A3615	Generator Temperature Sensor Circuit Short to Auxiliary Battery or Open	-	-	-	○	-	-
P0A361C	Generator Temperature Sensor Voltage Out of Range	-	-	-	○	-	-
P0A361F	Generator Temperature Sensor Circuit Intermittent	-	-	-	○	-	-
P0A8100	Hybrid/EV Battery Cooling Fan 1 Control Circuit High	-	-	-	○	-	-
P0A8111	Hybrid/EV Battery Cooling Fan 1 Circuit Short to Ground	-	-	-	○	-	-
P0A8115	Hybrid/EV Battery Cooling Fan 1 Circuit Short to Auxiliary Battery or Open	-	-	-	○	-	-
P0A814B	Hybrid/EV Battery Cooling Fan 1 Over Temperature	-	-	-	○	-	-
P0A8196	Hybrid/EV Battery Cooling Fan 1 Component Internal Failure	-	-	-	○	-	-
P0A8198	Hybrid/EV Battery Cooling Fan 1 Component or System Over Temperature	-	-	-	○	-	-
P0A9300	Inverter "A" Cooling System Performance	-	-	-	-	○	B
P0A9563	High Voltage Fuse Accumulated Load History	-	-	-	-	○	-
P0A9B11	Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Ground	-	-	-	-	○	-
P0A9B15	Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Auxiliary Battery or Open	-	-	-	○	-	-
P0A9B1C	Hybrid/EV Battery Temperature Sensor "A" Voltage Out of Range	-	-	-	○	-	-
P0A9B2A	Hybrid/EV Battery Temperature Sensor "A" Signal Stuck In Range	-	-	-	○	-	-
P0AA000	Hybrid/EV Battery Positive Contactor Circuit Stuck Closed	-	-	-	-	○	-
P0AA073	Hybrid/EV Battery Positive and Negative Contactor Actuator Stuck Closed	-	-	-	-	○	-
P0AA373	Hybrid/EV Battery Negative Contactor Actuator Stuck Closed	-	-	-	-	○	-
P0AA649	Hybrid/EV Battery Voltage System Isolation Internal Electronic Failure	-	-	-	-	○	-
P0AA749	Hybrid/EV Battery Voltage Isolation Sensor Circuit Internal Electronic Failure	-	-	-	○	-	-
P0AAC11	Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Ground	-	-	-	○	-	-
P0AAC15	Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Auxiliary Battery or Open	-	-	-	○	-	-
P0ABF00	Hybrid/EV Battery Current Sensor "A" Circuit Range/Performance	-	-	-	○	-	-
P0ABF11	Hybrid/EV Battery Current Sensor "A" Circuit Short to Ground	-	-	-	○	-	-
P0ABF15	Hybrid/EV Battery Current Sensor "A" Circuit Short to Auxiliary Battery or Open	-	-	-	○	-	-
P0ABF28	Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure	-	-	-	○	-	-
P0ABF2A	Hybrid/EV Battery Current Sensor "A" Signal Stuck In Range	-	-	-	○	-	-
P0AC511	Hybrid/EV Battery Temperature Sensor "B" Circuit Short to Ground	-	-	-	○	-	-
P0AC515	Hybrid/EV Battery Temperature Sensor "B" Circuit Short to Auxiliary Battery or Open	-	-	-	○	-	-
P0AC51C	Hybrid/EV Battery Temperature Sensor "B" Voltage Out of Range	-	-	-	○	-	-
P0AC52A	Hybrid/EV Battery Temperature Sensor "B" Signal Stuck In Range	-	-	-	○	-	-
P0ACA11	Hybrid/EV Battery Temperature Sensor "C" Circuit Short to Ground	-	-	-	○	-	-
P0ACA15	Hybrid/EV Battery Temperature Sensor "C" Circuit Short to Auxiliary Battery or Open	-	-	-	○	-	-
P0ACA1C	Hybrid/EV Battery Temperature Sensor "C" Voltage Out of Range	-	-	-	○	-	-
P0ACA2A	Hybrid/EV Battery Temperature Sensor "C" Signal Stuck In Range	-	-	-	○	-	-
P0AD911	Hybrid/EV Battery Positive Contactor Circuit Short to Ground	-	-	-	○	-	-
P0AD915	Hybrid/EV Battery Positive Contactor Circuit Short to Auxiliary Battery or Open	-	-	-	○	-	-
P0ADD11	Hybrid/EV Battery Negative Contactor Circuit Short to Ground	-	-	-	○	-	-
P0ADD15	Hybrid/EV Battery Negative Contactor Circuit Short to Auxiliary Battery or Open	-	-	-	○	-	-
P0AE173	Hybrid/EV Battery Precharge Contactor Actuator Stuck Closed	-	-	-	-	○	-
P0AE411	Hybrid/EV Battery Precharge Contactor Circuit Short to Ground	-	-	-	○	-	-
P0AE415	Hybrid/EV Battery Precharge Contactor Circuit Short to Auxiliary Battery or Open	-	-	-	○	-	-
P0AFC00	Hybrid/EV Battery Sensor Module	○	-	-	-	-	-
P0AFC16	Hybrid/EV Battery Sensor Module Circuit Voltage Below Threshold	-	○	-	-	-	-
P0AFC49	Hybrid/EV Battery Sensor Module Internal Electronic Failure	○	-	-	-	-	-
P0AFC62	Hybrid/EV Battery Sensor Module Signal Compare Failure	○	-	-	-	-	-
P0AFC96	Hybrid/EV Battery Sensor Module Component Internal Failure	○	-	-	-	-	-
P0B231C	Hybrid/EV Battery "A" Voltage Sensor Voltage Out of Range	-	-	-	○	-	-
P0B3B14	Hybrid/EV Battery Voltage Sensor "A" Circuit Short to Ground or Open	-	-	-	○	-	-
P0B4014	Hybrid/EV Battery Voltage Sensor "B" Circuit Short to Ground or Open	-	-	-	○	-	-
P0B4514	Hybrid/EV Battery Voltage Sensor "C" Circuit Short to Ground or Open	-	-	-	○	-	-
P0B4A14	Hybrid/EV Battery Voltage Sensor "D" Circuit Short to Ground or Open	-	-	-	○	-	-
P0B4F14	Hybrid/EV Battery Voltage Sensor "E" Circuit Short to Ground or Open	-	-	-	○	-	-
P0B5414	Hybrid/EV Battery Voltage Sensor "F" Circuit Short to Ground or Open	-	-	-	○	-	-
P0B5914	Hybrid/EV Battery Voltage Sensor "G" Circuit Short to Ground or Open	-	-	-	○	-	-
P0B5E14	Hybrid/EV Battery Voltage Sensor "H" Circuit Short to Ground or Open	-	-	-	○	-	-
P0B6314	Hybrid/EV Battery Voltage Sensor "I" Circuit Short to Ground or Open	-	-	-	○	-	-
P0B6814	Hybrid/EV Battery Voltage Sensor "J" Circuit Short to Ground or Open	-	-	-	○	-	-
P0B6D14	Hybrid/EV Battery Voltage Sensor "K" Circuit Short to Ground or Open	-	-	-	○	-	-
P0B7214	Hybrid/EV Battery Voltage Sensor "L" Circuit Short to Ground or Open	-	-	-	○	-	-
P0C3000	Hybrid/EV Battery State of Charge High	-	-	-	-	○	-
P0C7396	Motor Electronics Coolant Pump "A" Component Internal Failure	-	-	-	○	-	-
P0C7600	Hybrid/EV Battery System Discharge Time Too Long	-	-	-	-	○	-
P0D2D1C	Drive Motor "A" Inverter Voltage Sensor Voltage Out of Range	-	-	-	-	○	-
P0E311C	Boosting Converter Voltage Sensor "A" Voltage Out of Range	-	-	-	-	○	-
P160600	Collision detected or Collision Sensor Connection (Open)	-	-	-	-	-	-
P160604	Collision detected or Collision Sensor Connection (Open) System Internal Failure	-	-	-	-	-	-
P1A8000	Hybrid/EV Battery Stack 1 Delta SOC High	-	-	-	-	○	-
P1AC000	Hybrid/EV Battery Cell Low Voltage	-	-	-	-	○	-
P1AD01B	Hybrid/EV Battery Block Circuit Resistance Above Threshold	-	-	-	-	○	-
P1C2D62	Hybrid/EV Battery "A" Voltage Sensor/Boosting Converter Voltage Sensor "A" Signal Compare Failure	-	-	-	-	○	-
P1C6A9F	Motor Shutdown Stuck Off	-	-	-	-	○	-
P1C6C9F	Generator Shutdown Stuck Off	-	-	-	-	○	-
P1C7779	Engine Failed to Start Mechanical Linkage Failure	-	-	-	○	-	-
P1C7C49	Hybrid/EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure	-	-	-	-	○	-
P1C7D49	Hybrid/EV Battery Voltage System Isolation (Hybrid/EV Battery Area) Internal Electronic Failure	-	-	-	-	○	-
P1C7E49	Hybrid/EV Battery Voltage System Isolation (Transaxle Area) Internal Electronic Failure	-	-	-	-	○	-
P1C7F49	Hybrid/EV Battery Voltage System Isolation (Direct Current Area) Internal Electronic Failure	-	-	-	-	○	-
P1C8149	High Voltage Power Resource Circuit Consumption Circuit Short	-	-	-	-	○	-
P1C8249	High Voltage Power Resource Circuit Over Loading	-	-	-	-	○	-
P1C8349	High Voltage Power Resource Circuit Voltage Sensor after Boosting Malfunction	-	-	-	-	○	-
P1C8449	High Voltage Power Resource Circuit Short during Ready ON	-	-	-	-	○	-
P1C8549	High Voltage Power Resource Internal Electronic Failure	-	-	-	-	○	-
P1C8679	Transmission (Input) Mechanical Linkage Failure	-	-	-	-	○	-
P1C8779	Generator Mechanical Linkage Failure	-	-	-	-	○	-
P1C8879	Planetary Gear Mechanical Linkage Failure	-	-	-	-	○	-
P1C9E9F	Hybrid/EV System Reset Stuck Off	-	-	-	-	○	-
P1C9F11	Hybrid/EV Battery Current Sensor for Driving Control Circuit Short to Ground	-	-	-	○	-	-
P1C9F15	Hybrid/EV Battery Current Sensor for Driving Control Circuit Short to Auxiliary Battery or Open	-	-	-	○	-	-
P1C9F1C	Hybrid/EV Battery Current Sensor for Driving Control Voltage Out of Range	-	-	-	○	-	-
P1CBB12	Hybrid/EV Battery Current Sensor Power Supply Circuit Short to Auxiliary Battery	-	-	-	○	-	-
P1CBB14	Hybrid/EV Battery Current Sensor Power Supply Circuit Short to Ground or Open	-	-	-	○	-	-
P1CBE1E	Hybrid/EV Battery Block 1 Voltage Difference Out of Range	-	-	-	-	○	-
P1CBF1E	Hybrid/EV Battery Block 2 Voltage Difference Out of Range	-	-	-	-	○	-
P1CC01E	Hybrid/EV Battery Block 3 Voltage Difference Out of Range	-	-	-	-	○	-
P1CC11E	Hybrid/EV Battery Block 4 Voltage Difference Out of Range	-	-	-	-	○	-
P1CC21E	Hybrid/EV Battery Block 5 Voltage Difference Out of Range	-	-	-	-	○	-
P1CC31E	Hybrid/EV Battery Block 6 Voltage Difference Out of Range	-	-	-	-	○	-
P1CC41E	Hybrid/EV Battery Block 7 Voltage Difference Out of Range	-	-	-	-	○	-
P1CC51E	Hybrid/EV Battery Block 8 Voltage Difference Out of Range	-	-	-	-	○	-
P1CC61E	Hybrid/EV Battery Block 9 Voltage Difference Out of Range	-	-	-	-	○	-
P1CC71E	Hybrid/EV Battery Block 10 Voltage Difference Out of Range	-	-	-	-	○	-
P1CE213	PCU Interlock Circuit Open	-	-	-	-	○	-
P1CE292	PCU Interlock Performance or Incorrect Operation	-	-	-	-	○	-
P1CE31C	Hybrid/EV Powertrain Control Module Monitoring Processor A/D Processing Voltage Out of Range	○	-	-	-	-	-
P1CE349	Hybrid/EV Powertrain Control Module Monitoring Processor A/D Processing Internal Electronic Failure	○	-	-	-	-	-
P1CE371	Hybrid/EV Powertrain Control Module Monitoring Processor A/D Processing Actuator Stuck	○	-	-	-	-	-
P1CFA12	IGB Signal Circuit Short to Auxiliary Battery	○	-	-	-	-	-
P1CFD1E	Hybrid/EV Battery Block 11 Voltage Difference Out of Range	-	-	-	-	○	-
P212012	Throttle/Pedal Position Sensor/Switch "D" Circuit Short to Auxiliary Battery	-	-	-	○	-	-
P212014	Throttle/Pedal Position Sensor/Switch "D" Circuit Short to Ground or Open	-	-	-	○	-	-
P21201C	Throttle/Pedal Position Sensor/Switch "D" Voltage Out of Range	-	-	-	○	-	-
P21201F	Throttle/Pedal Position Sensor/Switch "D" Circuit Intermittent	-	-	-	○	-	-
P212512	Throttle/Pedal Position Sensor/Switch "E" Circuit Short to Auxiliary Battery	-	-	-	○	-	-
P212514	Throttle/Pedal Position Sensor/Switch "E" Circuit Short to Ground or Open	-	-	-	○	-	-
P21251C	Throttle/Pedal Position Sensor/Switch "E" Voltage Out of Range	-	-	-	○	-	-
P21251F	Throttle/Pedal Position Sensor/Switch "E" Circuit Intermittent	-	-	-	○	-	-
P213800	Throttle/Pedal Position Sensor/Switch "D"/"E" Voltage Correlation	-	-	-	○	-	-
P21382B	Throttle/Pedal Position Sensor/Switch "D"/"E" Signal Cross Coupled	-	-	-	○	-	-
P253012	IG2 Signal Circuit Short to Auxiliary Battery	○	-	-	-	-	-
P274A11	Transmission Fluid Temperature Sensor "C" Circuit Short to Ground	-	-	-	○	-	-
P274A15	Transmission Fluid Temperature Sensor "C" Circuit Short to Auxiliary Battery or Open	-	-	-	○	-	-
P274A1C	Transmission Fluid Temperature Sensor "C" Voltage Out of Range	-	-	-	○	-	-
P274A1F	Transmission Fluid Temperature Sensor "C" Circuit Intermittent	-	-	-	○	-	-
P300000	Hybrid/EV Battery Discharge Control Malfunction	-	-	-	-	○	-
P300016	Hybrid/EV Battery Control System Circuit Voltage Below Threshold	-	-	-	-	○	-
P30004B	Hybrid/EV Battery Control System Over Temperature	-	-	-	-	○	-
P300449	High Voltage Power Resource Circuit Short during Pre-Charge	-	-	-	-	○	-
P301100	Hybrid/EV Battery Block 1 Circuit Resistance Out of Range (Extreme)	-	-	-	-	○	-
P30111E	Hybrid/EV Battery Block 1 Circuit Resistance Out of Range	-	-	-	-	○	-
P301200	Hybrid/EV Battery Block 2 Circuit Resistance Out of Range (Extreme)	-	-	-	-	○	-
P30121E	Hybrid/EV Battery Block 2 Circuit Resistance Out of Range	-	-	-	-	○	-
P301300	Hybrid/EV Battery Block 3 Circuit Resistance Out of Range (Extreme)	-	-	-	-	○	-
P30131E	Hybrid/EV Battery Block 3 Circuit Resistance Out of Range	-	-	-	-	○	-
P301400	Hybrid/EV Battery Block 4 Circuit Resistance Out of Range (Extreme)	-	-	-	-	○	-
P30141E	Hybrid/EV Battery Block 4 Circuit Resistance Out of Range	-	-	-	-	○	-
P301500	Hybrid/EV Battery Block 5 Circuit Resistance Out of Range (Extreme)	-	-	-	-	○	-
P30151E	Hybrid/EV Battery Block 5 Circuit Resistance Out of Range	-	-	-	-	○	-
P301600	Hybrid/EV Battery Block 6 Circuit Resistance Out of Range (Extreme)	-	-	-	-	○	-
P30161E	Hybrid/EV Battery Block 6 Circuit Resistance Out of Range	-	-	-	-	○	-
P301700	Hybrid/EV Battery Block 7 Circuit Resistance Out of Range (Extreme)	-	-	-	-	○	-
P30171E	Hybrid/EV Battery Block 7 Circuit Resistance Out of Range	-	-	-	-	○	-
P301800	Hybrid/EV Battery Block 8 Circuit Resistance Out of Range (Extreme)	-	-	-	-	○	-
P30181E	Hybrid/EV Battery Block 8 Circuit Resistance Out of Range	-	-	-	-	○	-
P301900	Hybrid/EV Battery Block 9 Circuit Resistance Out of Range (Extreme)	-	-	-	-	○	-
P30191E	Hybrid/EV Battery Block 9 Circuit Resistance Out of Range	-	-	-	-	○	-
P302000	Hybrid/EV Battery Block 10 Circuit Resistance Out of Range (Extreme)	-	-	-	-	○	-
P30201E	Hybrid/EV Battery Block 10 Circuit Resistance Out of Range	-	-	-	-	○	-
P302100	Hybrid/EV Battery Block 11 Circuit Resistance Out of Range (Extreme)	-	-	-	-	○	-
P30211E	Hybrid/EV Battery Block 11 Circuit Resistance Out of Range	-	-	-	-	○	-
P306562	Hybrid/EV Battery Temperature Sensor "Group 1" Signal Compare Failure	-	-	-	○	-	-
P308A12	Hybrid/EV Battery Voltage Sensor All Circuit Short to Auxiliary Battery	-	-	-	○	-	-
P308A13	Hybrid/EV Battery Voltage Sensor All Circuit Open	-	-	-	○	-	-
P310711	Lost Communication with Airbag System Control Module Circuit Short to Ground	-	-	○	-	-	-
P310715	Lost Communication with Airbag System Control Module Circuit Short to Auxiliary Battery or Open	-	-	○	-	-	-
P310764	Lost Communication with Airbag System Control Module Signal Plausibility Failure	-	-	○	-	-	-
P312387	Lost Communication with Drive Motor Control Module "A" from Hybrid/EV Control Module Missing Message	-	-	○	-	-	-
P314779	Transmission (Shaft) Mechanical Linkage Failure	-	-	-	-	○	-
P314A31	Motor Electronics Coolant Pump "A" No Signal	-	-	-	○	-	-
P321E9F	Motor/Generator Shutdown Signal Stuck Off	-	-	-	-	○	-
P33B99F	Motor/Generator Shutdown Signal (Hybrid/EV Side) Stuck Off	-	-	-	-	○	-
P33BF9F	Motor/Generator Shutdown Signal (MG Side) Stuck Off	-	-	-	-	○	-
U010087	Lost Communication with ECM/PCM "A" Missing Message	-	-	○	-	-	-
U010487	Lost Communication with Cruise Control Module Missing Message	-	-	○	-	-	-
U011087	Lost Communication with Drive Motor Control Module "A" Missing Message	-	-	○	-	-	-
U012287	Lost Communication with Vehicle Dynamics Control Module Missing Message	-	-	○	-	-	-
U012987	Lost Communication with Brake System Control Module Missing Message	-	-	○	-	-	-
U014087	Lost Communication with Body Control Module Missing Message	-	-	○	-	-	-
U015187	Lost Communication with Restraints Control Module Missing Message	-	-	○	-	-	-
U016487	Lost Communication with HVAC Control Module Missing Message	-	-	○	-	-	-
U029387	Lost Communication with Hybrid/EV Powertrain Control Module Missing Message	-	-	○	-	-	-
U029A87	Lost Communication with Hybrid/EV Battery Sensor Module Missing Message	-	-	○	-	-	-
U042481	HVAC Control Module to Hybrid Powertrain Control Module Invalid Serial Data Received	-	-	○	-	-	-
U110787	Lost Communication with Power Management Module Missing Message	-	-	○	-	-	-
U117087	Lost Communication with Brake System Control Module (Secondary CAN Line) Missing Message	-	-	○	-	-	-

HINT:

The "Example of Multiple DTCs being Output" below is only one example of a malfunction condition. Therefore, a determination should not be made based on this alone.

Example of Multiple DTCs being Output:

The power supply of the microcomputer decreases while the vehicle is being driven.
1. DTCs are detected and the vehicle behavior is as follows.
Detected DTCs
- P060B1C (Hybrid/EV Powertrain Control Module A/D Processing Voltage Out of Range): Microcomputer malfunction*
- P06881F (ECM/PCM Power Relay Sense Circuit Intermittent): Power source circuit malfunction*
- P0AA749 (Hybrid/EV Battery Voltage Isolation Sensor Circuit Internal Electronic Failure): Sensor and actuator circuit malfunction*
- P0B231C (Hybrid/EV Battery "A" Voltage Sensor Voltage Out of Range): Sensor and actuator circuit malfunction*
- P1C9E9F (Hybrid/EV System Reset Stuck Off): System malfunction*
  - *: Check the priority level in the "DTC Order of Priority" chart above.
Vehicle Behavior
- System stopped
The inspection order of priority is: Microcomputer circuit → power source circuit → communication circuit → sensor and actuator circuit → system circuit. Therefore, check the repair procedure for P060B1C.
Follow the repair procedures and replace the hybrid vehicle control ECU. Finish the repair.

It is possible to check only the specified malfunctioning parts without having to check irrelevant parts.

Definition Of Terms

Diagnostic Trouble Code Chart

See More:

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Sfi System: Engine Coolant Temperature Sensor 1 Circuit Short to Battery or Open (P011515)
DESCRIPTION Refer to DTC P011511. Click here HINT: When DTC P011515 is stored, the ECM enters fail-safe mode. During fail-safe mode, the engine coolant temperature is estimated to be 80°C (176°F) by the ECM. Fail-safe mode continues until a pass condition is detected. DTC No. Detection Item DTC De ...

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Diagnosis System

Definition Of Terms

Diagnostic Trouble Code Chart

See More:

Toyota Avalon (XX50) 2019-2022 Owners Manual

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual