Special Tools Required

WARNING: This page is about a different car, the 2013 Honda Fit, 2012 Honda Fit, 2011 Honda Fit, 2010 Honda Fit, and 2009 Honda Fit. However, it is still accessible from the selected car via links, so may be relevant.

SRS inflator simulator 07SAZ-TB4011A
SRS simulator lead K 070AZ-SNAA200

NOTE:

Before doing this troubleshooting procedure, find out if the vehicle was in a collision. If so, verify that all the required components were replaced with new components, of the correct part number, and that they were properly installed. (See COMPONENT REPLACEMENT/INSPECTION AFTER DEPLOYMENT ).
Before doing this troubleshooting procedure, review SRS PRECAUTIONS AND PROCEDURES , General Troubleshooting Information (see DTC (DIAGNOSTIC TROUBLE CODES) ) and BATTERY TERMINAL DISCONNECTION AND RECONNECTION .
Before replacing the SRS unit, check the SRS unit software version with the HDS. If the software version is not the latest, update the SRS unit software (see SRS UNIT UPDATE ), and retest.

Clear the DTCs with the HDS (see CLEAR THE DTC MEMORY ).
Turn the ignition switch to ON (II), then wait for 10 seconds.
Check for the DTCs with the HDS (see READING THE DTC ).
Is DTC 21-9x indicated?

YES - Go to step 4.

NO - Intermittent failure, the system is OK at this time. Go to TROUBLESHOOTING INTERMITTENT FAILURES . If another DTC is indicated, troubleshoot the DTC.
Turn the ignition switch to LOCK (0).
Disconnect the negative cable from the battery, then wait at least 3 minutes.
Remove the B-pillar lower trim (see B-PILLAR UPPER/LOWER TRIM ), then disconnect the floor wire harness 4P connector (A) from the driver's seat belt tensioner.

Fig 1: Connecting SRS Inflator Simulator Connectors & Simulator Lead K To Floor Wire Harness

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Connect the terminals of SRS simulator lead K to the SRS inflator simulator (2 Ω connectors), and then connect SRS simulator lead K to the driver's seat belt tensioner 4P connector on the floor wire harness.
Reconnect the negative cable to the battery.
Clear the DTCs with the HDS (see CLEAR THE DTC MEMORY ).
Turn the ignition switch to ON (II), then wait for 10 seconds.
Check for the DTCs with the HDS (see READING THE DTC ).
Is DTC 21-9x indicated?

YES - Go to step 12.

NO - Short to ground in the driver's seat belt tensioner; replace the driver's seat belt (see FRONT SEAT BELT REPLACEMENT ), then clear the DTC.
Turn the ignition switch to LOCK (0).
Disconnect the negative cable from the battery, then wait at least 3 minutes.
Disconnect SRS unit connector B (39P) from the SRS unit (see step 10 under Disconnecting System Connectors ).
Disconnect SRS simulator lead K from the driver's seat belt tensioner 4P connector on the floor wire harness.
Measure the resistance between body ground and SRS unit connector B (39P) terminals No. 12 and No. 13, individually.

Fig 2: Measuring Resistance Between Body Ground & SRS Unit Connector B (39P) Terminals No. 12 & No. 13
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there an open circuit, or at least 1 MΩ ?

YES - Faulty SRS unit or poor connection at SRS unit connector B (39P) and the SRS unit. Check the connection; if the connection is OK, replace the SRS unit (see SRS UNIT REPLACEMENT ). If the DTC does not clear, replace the floor wire harness.

NO - Short to ground in the floor wire harness; replace the floor wire harness, then clear the DTC.