Inspection Mode 1
WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.
| DTC | Description & trouble part | Note |
|---|---|---|
| U0074 | CONTROL MODULE COMMUNICATION BUS "BODY-CAN" OFF | - |
| U0100 | LOST COMMUNICATION WITH ECM/PCM "A" | - |
| U0101 | LOST COMMUNICATION WITH TCM | - |
| U0122 | LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE | - |
| U0155 | LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE | - |
| U0401 | INVALID DATA RECEIVED FROM ECM/PCM "A" | - |
| U0416 | INVALID DATA RECEIVED FROM VEHICLE DYNAMICS CONTROL MODULE | - |
| U0423 | INVALID DATA RECEIVED FROM INSTRUMENT PANEL CLUSTER CONTROL MODULE | - |
| U1120 | LOST COMMUNICATION WITH AUTOSTART STOP CONTROL MODULE | - |
| U1140 | LOST COMMUNICATION WITH BODY CONTROL MODULE BODY-CAN | - |
| U1198 | LOST COMMUNICATION WITH TELEMATICS SYSTEM | - |
| U1422 | INVALID DATA RECEIVED FROM BODY CONTROL MODULE BODY-CAN | - |
| B2271 | IGN RELAY CONTROL CIRCUIT | - |
| B2274 | ACC RELAY CONTROL CIRCUIT | - |
| B2275 | ENGINE START REQUEST CONTROL CIRCUIT | - |
| B2276 | ACC RELAY OFF SIGNAL | - |
| B2277 | KEYLESS ACCESS CONTROL MODULE (WATER DETECTION) | - |
| B227B | PUSH ENGINE START SWITCH INPUT PERFORMANCE | - |
| B227C | P RANGE SIGNAL PERFORMANCE | - |
| B227D | KEYLESS ACCESS WITH PUSH BUTTON START | - |
| B2285 | STEERING LOCK POSITION SIGNAL CORRELATION | - |
| B2286 | ENGINE SPEED SIGNAL (WITHOUT AUTO START STOP) | - |
| B228A | ENGINE SPEED SIGNAL (WITH AUTO START STOP) | - |
| B2781 | STEERING LOCK CONTROL MODULE CONTROL CIRCUIT | - |
| B2782 | STEERING LOCK DRIVE REQUEST SIGNAL CORRELATION | - |
| B2785 | LIN COMMUNICATION | - |
| B2786 | STEERING LOCK CONTROL MODULE COMMUNICATION | - |
| B2788 | IGN SIGNAL CORRELATION (STEERING LOCK CONTROL MODULE) | - |
| B2789 | ID CODE BOX COMMUNICATION | - |
| B278B | CAN CONTROL MODULE STUCK | - |
| B278D | ID CODE BOX JUDGMENT CIRCUIT | - |
| B2793 | BACKUP POWER | - |
Diagnostic procedure:
- Check that the battery voltage is 12 V or more and fuel remains approx. half [20 - 40 L (5.3 - 10.6 US gal, 4.4 - 8.8 Imp gal)].
- Using the Subaru Select Monitor, perform the clear memory of [Keyless Access with Push Button Start]. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY
- Using the Subaru Select Monitor, read the DTC of [Keyless Access with Push Button Start] to check that there is no DTC displayed. Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) NOTE:
If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis for the displayed DTCs. After solving the DTC, repeat from step 1 .
- Start the engine, and let it idle for 40 seconds or more.
- Using the Subaru Select Monitor, read the DTC of [Keyless Access with Push Button Start] to check that there is no DTC displayed. Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) NOTE:
If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis for the displayed DTCs. After solving the DTC, repeat from step 1 .