Low Tire Pressure Indicator Does Not Come on, and No DTCs Are Stored
Symptom TroubleshootingLow tire pressure indicator does not come on, and no DTCs are stored
NOTE: Check for gauge DTCs with the HDS. If gauge DTCs are stored, troubleshoot those DTCs first.
1. Turn the ignition switch to ON (II).
2. Check the low tire pressure indicator for several seconds when the ignition switch is turned to ON (II).
Did the indicator come on and then go off?
YES - Go to step 3.
NO - Do the troubleshooting for the gauge control module. If necessary, substitute a known-good gauge control module (tach) and recheck.
3. Test-drive the vehicle at 28 mph (45 km/h) or more for at least 1 minute.
4. Stop the vehicle, and lower the pressure in each tire until the low tire pressure indicator comes on. Reinflate the tire before continuing to the next tire.
NOTE: If 5 minutes has passed since finishing the last test-drive, reactivate the appropriate tire pressure sensors using the TPMS sensor initializer tool.
Does the indicator come on when the pressure drops below: 4-door DX model 168 kPa (1.7 kgf/cm2, 24 psi), 4-door Si model 183 kPa (1.9 kgf/cm2, 27 psi), except 4-door DX and 4-door Si models 175 kPa (1.8 kgf/cm2, 25 psi) or less?
YES - The system is OK at this time.
NO - Go to step 5.
5. Determine the effected tire location by the tire pressure sensor number.
Did the sensors respond to the TPMS initializer tool?
YES - Go to step 6.
NO - Check that the tire pressure sensor is properly mounted. If necessary, replace the appropriate tire pressure sensor.
6. Check the TIRE 1, TIRE 2, TIRE 3, or TIRE 4 AIR PRESSURE in the TPMS DATA LIST with the HDS, and compare with the actual measured tire pressure.
Is the indicated tire pressure on the HDS within 40 kPa (0.4 kgf/cm2, 6 psi) of the actual tire pressure?
YES - Go to step 7.
NO - Replace the appropriate tire pressure sensor.
7. Turn the ignition switch to LOCK (0).
8. Disconnect the TPMS control unit 20P connector.
9. Measure voltage between TPMS control unit 20P connector terminals No. 3 and No. 8.
Is there battery voltage?
YES - Repair short to power in the wire between the TPMS control unit and the No. 10 (7.5 A) fuse in the under-dash fuse/relay box.
NO - Check for loose terminals and poor connections at the TPMS control unit. If necessary, substitute a known-good TPMS control unit and recheck.