Low Tire Pressure Indicator Does Not Come on, and No DTCs Are Stored

Low tire pressure indicator does not come on, and no DTCs are stored ('08 model)

1. Turn the ignition switch ON (II), and watch the low pressure indicator.

Does the low pressure indicator come on for 2 seconds?

YES - Go to step 2.

NO - Do the self-diagnostic function for the gauge control module. If necessary, substitute a known-good gauge control module, and recheck.

2. Lower the pressure in any tire until the low tire pressure indicator comes on.

Does the indicator come on when the pressure drops below: 168 kPa (1.7 kgf/cm2, 24 psi) or less?

YES - The system is OK at this time.

NO - Go to step 3.

3. Connect the HDS, and read the pressure of the low tire(s). If UNDEFINED is shown on the HDS, turn the ignition switch OFF, rotate the appropriate tire 1/4 turn, then turn the ignition switch ON (II), and try again. If there is no response, repeat the procedure in the previous sentence until a NORMAL is shown.

Is the tire pressure shown on the HDS monitor within 40 kPa (0.4 kgf/cm2, 6 psi) of the actual tire pressure?

YES - Check for loose terminals and poor connections at the TPMS control unit. If necessary, substitute a known-good TPMS control unit, and recheck.

NO - Replace the tire pressure sensor.