Low tire pressure and tire indicators do not come on, and no DTCs are stored
- Turn the ignition switch to ON (II), and watch the low pressure indicator and the tire indicators.
Do the low tire pressure and indicators come on for at least 2 seconds?
YES -Go to step 2.
NO -Go to step 4.
- Check the pressure in all four tires.
Is the tire pressure 168 kPa (1.7 kgf/cm 2 , 24 psi) or less?
YES -Go to step 3.
NO -Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting (see INTERMITTENT FAILURES ).
- Connect the HDS and read the pressure of the low tires.NOTE: If UNDEFINED is shown on sensor transmitter status, turn the ignition switch to LOCK (0), rotate the appropriate tire 1/4 turn, then turn the ignition switch to ON (II), and try again. If there is still no response, repeat the procedure in the previous sentence until a response is shown.
Is the tire pressure shown on the HDS monitor within 40 kPa (0.4 kgf/cm 2 , 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 (see TIRE PRESSURE SENSOR REPLACEMENT ). ■
- Connect the HDS and select TPMS.
Does the HDS communicate with the TPMS control unit?
YES -Go to step 9.
NO -Go to step 5.
- Measure the voltage between the TPMS control unit connector A (14P) terminals No. 3 and No. 5.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there battery voltage?
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 -Go to step 6.
- Turn the ignition switch to LOCK (0), then disconnect the TPMS control unit connector A (14P).
- Turn the ignition switch to ON (II).
- Measure the voltage between the TPMS control unit connector A (14P) terminal No. 5 and body ground.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there battery voltage?
YES -Repair the open in the ground wire between the TPMS control unit and body ground (G401). ■
NO -Check fuse No. 21 (7.5 A) in the under-dash fuse/relay box. If the fuse is OK, repair the open in the wire between the under-dash fuse/relay box and the TPMS control unit. ■
- With the HDS, command the system to turn on each tire indicator and the low pressure indicator.
Does the low pressure and each tire indicator illuminate?
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 -Do the input test for the gauge control module (see GAUGE CONTROL MODULE INPUT TEST ). If necessary, substitute a known-good gauge control module and recheck. ■