Steering Pad Switch Circuit [09/2022 - 11/2022]: Procedure
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2023 Toyota GR Corolla, 2023 Toyota Corolla, 2022 Toyota Corolla, 2021 Toyota Corolla, and 2020 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK HARNESS AND CONNECTOR (STEERING PAD SWITCH SIGNAL)
- Disconnect the I55 radio and display receiver assembly connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition I55-21 (SW1) - I55-24 (SWG) No switch pushed 95 to 105 kΩ Seek+ switch pushed Below 2.5 Ω Seek- switch pushed 313 to 345 Ω Volume+ switch pushed 950 to 1050 Ω Volume- switch pushed 2955 to 3265 Ω I55-22 (SW2) - I55-24 (SWG) No switch pushed 95 to 105 kΩ MODE switch pushed Below 2.5 Ω On/off hook switch pushed 950 to 1050 Ω Voice switch pushed 2955 to 3265 Ω Result
Proceed to OK NG
Result:
OK
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [09/2022 - 11/2022]
Result:
NG
See step 2
- INSPECT STEERING PAD SWITCH ASSEMBLY
- Remove the steering pad switch assembly.
Refer to REMOVAL [09/2022 - 11/2022]
- Inspect the steering pad switch assembly.
Refer to INSPECTION [09/2022 - ]
Result
Proceed to OK NG
Result:
NG
REPLACE STEERING PAD SWITCH ASSEMBLY. Refer to REMOVAL [09/2022 - 11/2022]
Result:
OK
See step 3
- Remove the steering pad switch assembly.
- INSPECT SPIRAL CABLE SUB-ASSEMBLY
- Remove the spiral cable sub-assembly.
Refer to REMOVAL [09/2022 - 11/2022]
- Inspect the spiral cable sub-assembly.
Refer to INSPECTION [06/2018 - ]
Result
Proceed to OK NG
Result:
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - SPIRAL CABLE SUB-ASSEMBLY)
Result:
NG
REPLACE SPIRAL CABLE SUB-ASSEMBLY. Refer to REMOVAL [09/2022 - 11/2022]
- Remove the spiral cable sub-assembly.