DTC C1242: Open Circuit in IG1/IG2 Power Source Circuit [10/2018 - ]: Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus UX 250h, 2023 Lexus UX 250h, 2022 Lexus UX 250h, 2021 Lexus UX 250h, and 2020 Lexus UX 250h. However, it is still accessible from the selected car via links, so may be relevant.
Refer to DTC C1241.
Refer to DTC C1241: Low or High Power Supply Voltage [10/2018 - ]
| DTC No. |
Detection Item |
INF Code |
DTC Detection Condition |
Trouble Area |
MIL |
Note |
| C1242 |
Open Circuit in IG1/IG2 Power Source Circuit |
111
112 |
- INF Code: 111
- When the IG1 terminal voltage is less than 3.5 V, the IG2 terminal voltage is 9.5 V or more for 4 seconds or more.
- INF Code: 112
- When communication with the hybrid vehicle control ECU is normal or the vehicle speed is 10 km/h (6 mph) or more, and the IG1 terminal voltage is 9.5 V or more, the IG2 terminal voltage is less than 3.5 V for 4 seconds or more.
|
- INF Code: 111
- Open or short in IG1 circuit
- Improperly connected connector, deformation or corrosion of terminals
- Smart key system (IG start circuit)
- Auxiliary battery
- Hybrid control system (Charging circuit)
- Skid control ECU (brake booster with master cylinder assembly)
- INF Code: 112
- Open or short in IG2 circuit
- Improperly connected connector, deformation or corrosion of terminals
- Smart key system (IG start circuit)
- Auxiliary battery
- Hybrid control system (Charging circuit)
- Skid control ECU (brake booster with master cylinder assembly)
|
Comes on |
- INF Code 111: SAE Code C123B
- INF Code 112: SAE Code C123E
- Electronically controlled brake system DTC
|