Smart Junction Box (SJB) Diagnostic Trouble Code (DTC) Index
SMART JUNCTION BOX DIAGNOSTIC TROUBLE CODE INDEX
| DTC | Description | Action to Take |
|---|---|---|
| C1779 | (Single-zone EMTC only) Blower request signal circuit short to ground | GO to PINPOINT TEST L . |
| B2175 | (Single-zone EMTC only) A/C request signal circuit short to ground | GO to PINPOINT TEST I . |
| B2513 | Blower motor relay circuit short to ground | EMTC and blower is inoperative, GO to PINPOINT TEST K . EMTC and blower operates, GO to PINPOINT TEST L . EATC and blower is inoperative, GO to PINPOINT TEST M . EATC and blower operates, GO to PINPOINT TEST N . |
| B2514 | Blower motor relay circuit open/short to voltage | EMTC, GO to PINPOINT TEST K . EATC, GO to PINPOINT TEST M . |
| B2543 | Auxiliary control/actuator reference circuit short to ground | If auxiliary blower, temperature and mode are all affected, GO to PINPOINT TEST O . If temperature only is affected, GO to PINPOINT TEST Q . If mode only is affected, GO to PINPOINT TEST R . |
| B2544 | Auxiliary control/actuator reference circuit short to voltage | If auxiliary blower, temperature and mode are all affected, GO to PINPOINT TEST P . If temperature only is affected, GO to PINPOINT TEST Q . If mode only is affected, GO to PINPOINT TEST R . |
| B2559 | Auxiliary blower motor relay circuit short to voltage | GO to PINPOINT TEST O . |
| B2688 | Auxiliary blower motor relay circuit open/short to ground | If auxiliary blower motor is inoperative, GO to PINPOINT TEST O . If auxiliary blower motor operates, GO to PINPOINT TEST P . |
| B2561 | Auxiliary blower motor speed relay 1 circuit short to voltage | GO to PINPOINT TEST P . |
| B2562 | Auxiliary blower motor speed relay 1 circuit open/short to ground | GO to PINPOINT TEST P . |
| B2563 | Auxiliary blower motor speed relay 2 circuit short to voltage | GO to PINPOINT TEST P . |
| B2564 | Auxiliary blower motor speed relay 2 circuit open/short to ground | GO to PINPOINT TEST P . |
| B2916 | Auxiliary blend door motor circuits shorted | GO to PINPOINT TEST Q . |
| B2917 | Auxiliary mode door motor circuits shorted | GO to PINPOINT TEST R . |
| B2919 | Auxiliary blower motor speed input circuit short to voltage | GO to PINPOINT TEST P . |
| B2920 | Auxiliary mode door feedback circuit open/shorted | GO to PINPOINT TEST R . |
| B2921 | Auxiliary blend door feedback circuit open/shorted | GO to PINPOINT TEST Q . |