Self-Diagnostic Procedures; Reading The Dtc - Honda CR-V 1997 Service Manual

Troubleshooting
Self-diagnostic Procedures
The self-diagnostic function of the SRS system allows
it
to locate the causes of system problems and to store this informa-
tion in memory. For easier troubleshooting, this data can be retrieved via a data link circuit.
• When you turn the ignition switch ON
(11),
the SRS indicator will come on. If it goes off after six 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 bat-
tery is disconnected.
• When you connect the SCS service connector to the service check connector (2P), 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 DIC, proceed with the troubleshooting for this code.
Precautions
• Use only a digital multimeter to check the system. If it's not a Honda multimeter, make sure its output is 10 rnA (0.01 A)
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 three minutes, be careful not to bump the
SRS unit; the airbags could accidentally deploy and cause damage or injuries.
• Before you remove the SRS main harness, disconnect the airbag and tensioner connectors (see page 24-23).
• Make sure the battery is sufficiently charged (see section 23). 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 SCS service connector.
For backprobing spring-loaded lock type connectors, refer to page 24-22.
Reading the OTe
When the SRS indicator light is on, read the DTC using one of these methods:
A. Connect the Honda PGM Tester to the 1SP Data Link Connector (DLC), and follow the tester's prompts. If the tester
indicates no DTC, DTC 9-1 and DTC 9-2, double-check by jumping the service check connector (2P) and watching the
SRS indicator light (see next page).
DATA LINK CONNECTOR (DLC)
(16P)
HONDA
PGM
TESTER
24-26