Honda 2004 Odyssey Service Manual page 2100

General Troubleshooting Information
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 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 HDS to the 16P data link connector (DLC) to short the SCS terminal, and turn the ignition
switch ON (II), the SRS indicator will indicate the diagnostic trouble code (DTC) by the number of blinks.
• When you connect the HDS to the 16P date link connector (DLC), you can retrieve the DTC in the Honda Systems
''SRS'' menu.
• 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's not a Honda multimeter, make sure it's 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 harness, 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 won't 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 HDS. Backprobe spring-loaded lock type connectors
correctly.
Reading the DTC ('99-02 Models)
When the SRS indicator is on, read the DTC using either of the following methods:
HDS
Connect the HDS to the 16P Data Link Connector (DLC) (A).
A
(cont'd)
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