AIR SUSPENSION SYSTEM DIAGNOSTIC TROUBLE CODE CHART
Tech Tips
If a trouble code is displayed during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "See page" below.
| DTC Code | Detection Item | Trouble Area | Warning Indicate | See page |
|---|---|---|---|---|
| C1711 | Front Height Control Sensor RH Circuit Malfunction | 1. Wire harness or connector 2. Height control sensor front RH 3. Suspension control ECU |
Indicate | |
| C1712 | Front Height Control Sensor LH Circuit Malfunction | 1. Wire harness or connector 2. Height control sensor front LH 3. Suspension control ECU |
Indicate | |
| C1713 | Rear Height Control Sensor RH Circuit Malfunction | 1. Wire harness or connector 2. Height control sensor rear RH 3. Suspension control ECU |
Indicate | |
| C1714 | Rear Height Control Sensor LH Circuit Malfunction | 1. Wire harness or connector 2. Height control sensor rear LH 3. Suspension control ECU |
Indicate | |
| C1741 | Front Height Control Solenoid Valve RH Circuit Malfunction | 1. Height control valve No .1 2. Wire harness or connector 3. Suspension control ECU |
Indicate | |
| C1742 | Front Height Control Solenoid Valve LH Circuit Malfunction | 1. Height control valve No .1 2. Wire harness or connector 3. Suspension control ECU |
Indicate | |
| C1743 | Rear Height Control Solenoid Valve RH Circuit Malfunction | 1. Height control valve No. 2 2. Wire harness or connector 3. Suspension control ECU |
Indicate | |
| C1744 | Rear Height Control Solenoid Valve LH Circuit Malfunction | 1. Height control valve No. 2 2. Wire harness or connector 3. Suspension control ECU |
Indicate | |
| C1745 | Exhaust Solenoid Valve Circuit Malfunction | 1. Height control compressor assembly (Exhaust valve) 2. Wire harness or connector 3. Suspension control ECU |
Indicate | |
| C1748 | Low Pressure Tank Valve | 1. Low pressure tank valve 2. Wire harness or connector 3. Suspension control ECU |
Not indicate | |
| C1751 | Compressor Relay Coil Malfunction | 1. AIR SUS relay 2. Wire harness or connector 3. Suspension control ECU |
Indicate | |
| C1752 | Height Control Compressor Motor Circuit Malfunction | 1. AIR SUS relay 2. AIR SUS fusible link 3. Height control compressor assembly (compressor motor) 4. Wire harness or connector 5. Suspension control ECU |
Indicate | |
| C1761 (*1) |
Continuous Electric Current to Height Control Compressor Motor | 1. Air leakage from the air tube or each valve 2. Height control valve No. 1 3. Height control valve No. 2 4. Height control compressor assembly (Exhaust valve) 5. Pneumatic tank assembly (Low pressure tank valve) 6. Height control compressor assembly (Compressor motor) 7. AIR SUS relay 8. Wire harness or connector 9. Suspension control ECU |
Not indicate | |
| C1762 (*2) |
Continuous Electric Current to Exhaust Solenoid | 1. Air leakage from the air tube or each valve 2. Height control valve No. 1 3. Height control valve No. 2 4. Height control compressor assembly (Exhaust valve) 5. Pneumatic w/tube tank assembly (Low pressure tank valve) 6. Wire harness or connector 7. Suspension control ECU |
Not indicate | |
| C1781 | Suspension Control ECU Malfunction | 1. CAN communication system 2. Suspension control ECU |
Indicate | |
| C1782 | Power Source Voltage Malfunction | 1. Auxiliary battery 2. Charging system 3. ECU IG1 Fuse 4. AIR SUS Fuse 5. Wire harness or connector 6. Suspension control ECU |
Indicate | |
| C1783 | Speed Signal Communication Error | 1. Speed sensor circuit 2. Skid control ECU 3. Suspension control ECU |
Indicate | |
| C1787 | Forward/Rearward/Sideways G Sensor Communication Error | 1. Yaw rate sensor | Not indicate | |
| C1789 | Vehicle Identification Malfunction | 1. Vehicle identification information not registered 2. Power management control ECU 3. Suspension control ECU |
Not indicate | |
| C1792 | Height Control Switch Circuit (Test Mode DTC) | 1. Height control switch (driver seat) 2. Harness or connector 3. Suspension control ECU |
(Test Mode DTC) | |
| C1794 | Height Control OFF Switch Circuit (Test Mode DTC) | 1. Height control OFF switch 2. Harness or connector 3. Suspension control ECU |
(Test Mode DTC) | |
| C1799 | Luggage Room Mode Switch Circuit (Test Mode DTC) | 1. Height control switch (luggage compartment) 2. Harness or connector 3. Suspension control ECU |
(Test Mode DTC) | |
| U0122 | Lost Communication with Vehicle Dynamics Control Module | 1. CAN communication line 2. Skid control ECU 3. Suspension control ECU |
Indicate | |
| U0124 | Lost Communication with Lateral Acceleration Sensor Module | 1. CAN communication line 2. Yaw rate sensor 3. Suspension control ECU |
Not indicate | |
| U0140 | Lost Communication with Main Body ECU | 1. CAN communication line 2. Main body ECU 3. Suspension control ECU |
Not indicate | |
| U0293 | Lost Communication with HV ECU | 1. CAN communication line 2. Power management control ECU 3. Suspension control ECU |
Not indicate |
Tech Tips
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*1: The system may output DTC C1761 even when the system is normal if one of the following occurs: 1) the vehicle is full of passengers and the luggage compartment is full; 2) the vehicle is being driven or is stopped on an irregular surface; or 3) the air ducts are frozen.
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*2: The system may output DTC C1762 even when the system is normal if one of the following occurs: 1) the vehicle is being driven or is stopped on an irregular surface; or 2) the air tubes are clogged with snow or are frozen. If DTC C1762 is output, vehicle height control will stop. However, if the power switch is turned off and then on (IG), vehicle height control will start.