DTC (Diagnostic Trouble Codes)

The self-diagnostic function of the SRS system allows it to locate the causes of system problems and then store this information in memory. For easier troubleshooting, this data can be retrieved via a data link circuit.

• When you turn the ignition switch ON (II), the SRS indicator will come on. If it goes off after 6 seconds, the system is normal.
• If there is an abnormality, the system locates and defines the problem, stores this information in memory and turns the SRS indicator light on. The data will remain in the memory even when the ignition switch is turned off or if the battery is disconnected.
• When you connect the SCS short connector (or DLC terminal box) to the service check connector (2P) or 16P data link connector (DLC) and turn the ignition switch ON (II), the SRS indicator light will indicate the diagnostic trouble code (DTC) by the number of blinks.
• After reading and recording the DTC, proceed with the troubleshooting procedure for this code.

Precautions

• Use only a digital multimeter to check the system. If it is not a Honda multimeter, make sure the output is 10 mA (0.01A) or less when switched to the smallest value in the ohmmeter range. A tester with a higher output could damage the airbag circuit or cause accidental airbag deployment and possible injury.
• Whenever the ignition switch is ON (II), or has been turned OFF for less than 3 minutes, be careful not to bump the SRS unit; the airbags could accidentally deploy and cause damage or injuries.
• Before you remove the SRS wire harness from the SRS unit, disconnect the driver's airbag connector, the front passenger's airbag connector, both side airbag connectors, and both seat belt tensioner connectors.
• Make sure the battery is sufficiently charged. If the battery is dead or low, measuring values will not be correct.
• Do not touch a tester probe to the terminals in the SRS unit or harness connectors and do not connect the terminals with a jumper wire. Use only the backprobe set and the special tools.

Reading the DTC

When the SRS indicator light is on, read the DTC using either of the following methods:

PGM Tester Method

Connect the Honda PGM Tester (A) to the 16P Data Link Connector (DLC)(B), and follow the tester's prompts in the ''SRS'' menu. If the tester indicates no DTC, DTC 9-1 or DTC 9-2, read by SRS indicator light method.