Test F: SJB Will Not Enter Sensor Training Mode

Pinpoint Test F: SJB Will Not Enter Sensor Training Mode

Normal Operation
For the smart junction box (SJB) to enter tire pressure monitoring system (TPMS) sensor training mode, the SJB must receive valid input from the brake pedal position (BPP) switch (OFF-ON-OFF) and ignition switch (both OFF and RUN), the SJB must also receive valid vehicle speed sensor input (0 km/h [0 mph]). Refer to Tire Pressure Monitoring System (TPMS) Sensor Training for the complete sensor training procedure.

The BPP receives fused battery voltage from SJB fuse 32 (5A) along circuit SBP32 (VT/RD). When the brake pedal is pressed, the switch closes and the fused battery voltage is sent to the ABS module, the PCM, the brake shift interlock, the speed control servo (if equipped) (through the clutch pedal position switch if equipped with a manual transmission) and the four wheel drive (4WD) control module (if equipped) along circuit CCB15 (BN/GN). When the brake pedal is not pressed, the switch is closed and connects circuit CCB15 (BN/GN) to ground along circuit GD161 (BK/YE).

DTC C1446 Brake Switch Circuit Failure - If the SJB detects a short to voltage on the BPP switch input circuit during the on-demand self test, DTC C1446 will be set.

This pinpoint test is intended to diagnose the following:
^ Wiring, terminals or connectors
^ BPP switch
^ Ignition switch
^ SJB

F1:

F2-F6:

F7-F9:

F9 (Continued)-F11:

F11 (Continued)-F13: