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P0AE3 Lexus Code - Hybrid Battery Precharge Contactor Circuit Stuck Open

- Code Popularity: 808 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
By - Updated Oct 15, 2019
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|Code P0AE3 Lexus Possible Causes

  • Faulty System Main Relay
  • System Main Relay harness is open or shorted
  • System Main Relay circuit poor electrical connection
  • Faulty HV control ECU

|How do I Fix the Code P0AE3 Lexus?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Does your Lexus have Safety Recalls? → Check here

|What is the Cost to Diagnose the Code P0AE3 Lexus?

Labor: 1.0

The cost of diagnosing the P0AE3 Lexus code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

|What are Code P0AE3 Lexus Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|Code P0AE3 Lexus Description

The SMRs (System Main Relays) connect and disconnect the high-voltage power supply circuit in accordance with requests from the HV control ECU. To ensure a reliable operation, they consists of a total of 3 relays (1 for the negative side and 2 for the positive side).
To connect, SMR1 and SMR3 turn ON initially. Then, SMR2 turns ON and SMR1 turns OFF. This process protects the circuit from the high-voltage surge current by allowing the limit current to flow via the resistor.
To disconnect, SMR2 and SMR3 turn OFF in that order. The HV control ECU checks that the relays have turned OFF properly.
The HV control ECU monitors the proper operation of the SMRs (CON1, CON2 and CON3) to check for a malfunction.

OBDII Code P0AE3 Lexus - Hybrid Battery Precharge Contactor Circuit Stuck Open -
P0AE3 Lexus Code - Hybrid Battery Precharge Contactor Circuit Stuck Open

|Need More Information on the P0AE3 Lexus Code?

Need more information on how to fix the P0AE3 Lexus code? Get Access to Factory Service Manuals

|Need Help with the P0AE3 Lexus Code?

Get the P0AE3 Lexus code diagnosed by a professional: Find a repair shop in your area

|Code P0AE3 Lexus comments

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