DTC P2533-14: Ignition Switch On/Start Position Circuit Low Circuit Short to Ground or Open [08/2023 - ]: Procedure
WARNING: This page is about a different car, the 2025 Lexus RX 450h+ and 2024 Lexus RX 450h+. However, it is still accessible from the selected car via links, so may be relevant.
- READ VALUE USING GTS (IGR)
- Read the Data List.
Powertrain > Hybrid Control > Data List
Tester Display IGR Standard
GTS Display Switch Condition Specified Condition IGR Ignition switch ON ON Result
Reault Proceed to The value of IGR is ON A The value of IGR is OFF B
Result:
A
CHECK FOR INTERMITTENT PROBLEMS. Refer to CHECK FOR INTERMITTENT PROBLEMS [08/2023 - ]
Result:
B
See step 2
- Read the Data List.
- CHECK TERMINAL VOLTAGE (IGR VOLTAGE)
- Measure the voltage according to the value(s) in the table below.
*a Component with harness connected
(Hybrid Vehicle Control ECU)- - Standard Voltage
Tester Connection Switch Condition Specified Condition Result A21-8 (IGR) - C59-1 (E1) Ignition switch ON 11 to 14 V V Result
Proceed to OK NG
Result:
OK
REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to REMOVAL [10/2022 - ]
Result:
NG
See step 3
- Measure the voltage according to the value(s) in the table below.
- CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - HYBRID VEHICLE CONTROL ECU)
Pre-procedure1
- Disconnect the hybrid vehicle control ECU connector.
- Disconnect the power distribution box assembly connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open)
Tester Connection Condition Specified Condition Result C90-36 - A21-8 (IGR) Always Below 1 Ω Ω Standard Resistance (Check for Short)
Tester Connection Condition Specified Condition Result C90-36 or A21-8 (IGR) - Body ground and other terminals Always 10 kΩ or higher kΩ Result
Proceed to OK NG
Post-procedure1
- Connect the power distribution box assembly connector.
- Connect the hybrid vehicle control ECU connector.
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 4
- CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - BODY GROUND)
Pre-procedure1
- Disconnect the power distribution box assembly connectors.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition Result C89-36 - Body ground Always Below 1 Ω Ω C90-41 - Body ground Always Below 1 Ω Ω Result
Proceed to OK NG
Post-procedure1
- Connect the power distribution box assembly connectors.
Result:
OK
REPLACE POWER DISTRIBUTION BOX ASSEMBLY. Refer to REMOVAL [08/2023 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR