Smart Junction Box (SJB)
SMART JUNCTION BOX (SJB) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Perform Test |
|---|---|---|
| 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 . |