Low tire pressure/TPMS indicator does not go off, and no DTCs are stored

NOTE: If the TPMS control unit was replaced, the low tire pressure/TPMS indicator will be on until all four tire pressure sensor ID codes are learned.

Turn the ignition switch to ON (II).
Check the low tire pressure/TPMS indicator for several seconds when the ignition switch is turned ON (II).
Did the indicator come on, and then go off?

YES -Intermittent failure, the system is OK at this time.

NO -Go to step 3.
Turn the ignition switch to LOCK (0).
Check the No. 2 (7.5 A) fuse in the under-dash fuse/relay box.
Is the fuse blown?

YES -Replace the fuse. Turn the ignition switch to ON (II), then turn it to LOCK (0) again. If the fuse blows again, repair the short to ground on the No. 2 (7.5 A) fuse circuit.

NO -Reinstall the checked fuse, then go to step 5.
Check the No. 22 (7.5 A) fuse in the under-dash fuse/relay box.
Is the fuse blown?

YES -Replace the fuse. Turn the ignition switch to ON (II), then turn it to LOCK(0) again. If the fuse blows again, repair the short to ground on the No. 22 (7.5 A) fuse circuit.

NO -Reinstall the checked fuse, then go to step 6.
Do the gauge control module self-diagnostic function (see SELF-DIAGNOSTIC FUNCTION ).
Is the gauge control module OK?

YES -Go to step 7.

NO -Replace the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).
Disconnect the TPMS control unit 20P connector (see step 3).
Measure the voltage between body ground and TPMS control unit 20P connector terminal No. 10.

Fig 1: Measuring Voltage Between Body Ground And TPMS Control Unit 20P Connector Terminal No. 10
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES -Go to step 9.

NO -Repair an open in the wire between the TPMS control unit and the No. 2 (7.5 A) fuse in the under-dash fuse/relay box.
Turn the ignition switch to ON (II).
Measure the voltage between body ground and TPMS control unit 20P connector terminal No. 8.

Fig 2: Measuring Voltage Between Body Ground And TPMS Control Unit 20P Connector Terminal No. 8
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES -Go to step 11.

NO -Repair an open in the wire between the TPMS control unit and the No. 22 (7.5 A) fuse in the under-dash fuse/relay box.
Turn the ignition switch to LOCK (0).
Reconnect the TPMS control unit 20P connector.
Turn the ignition switch to ON (II).
Measure the voltage between body ground and TPMS control unit 20P connector terminal No. 3.

Fig 3: Measuring Voltage Between Body Ground And TPMS Control Unit 20P Connector Terminal No. 3
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 0.1 V or more?

YES -Repair an open or high resistance in the wire between the TPMS control unit and body ground (G502).

NO -Go to step 15.
Turn the ignition switch to LOCK (0).
Disconnect gauge control module 32P connector (see GAUGE CONTROL MODULE REPLACEMENT ).
Disconnect the TPMS control unit 20P connector (see TPMS CONTROL UNIT REPLACEMENT ).

Check for continuity between the TPMS control unit 20P connector terminals and the gauge control module 32P connector terminals according to the table.

Terminal name	TPMS Control Unit 20P Connector Terminal	Gauge Control Module 32P Connector Terminal
CANL	No. 11	No. 19
CANH	No. 2	No. 20

Fig 4: Checking For Continuity Between TPMS Control Unit 20P Connector Terminals And Gauge Control Module 32P Connector Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Do the troubleshooting for the gauge control module (see SELF-DIAGNOSTIC FUNCTION ). If the gauge control module is OK, check for loose terminals and poor connections at the TPMS control unit. If necessary, substitute a known-good TPMS control unit (see TPMS CONTROL UNIT REPLACEMENT ), and recheck.

NO -Repair an open in the wire between the TPMS control unit and the gauge control module.