Acura RL (1996-2004 year). Manual — part 684
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Troubleshooting - '96 - 98 Models
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 (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 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 DTC, 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 mA
(0.01 A) or less when switched to the smallest value in the ohmmeter range. A tester with a higher output could dam-
age 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 main harness, disconnect the driver's airbag connector, the front passenger's airbag con-
nector and both seat belt tensioner connectors.
• Make sure the battery is sufficiently charged (see
). 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 special tools.
For backprobing spring-loaded lock type connectors, refer to page 24-31.
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Troubleshooting - '96 - 98 Models
Reading the DTC
When the SRS indicator light is on, read the DTC using one of these methods:
A. Connect the Honda PGM Tester to the 16P Data Link Connector (DLC), and follow the tester's prompts. If the tester
indicates no DTC, DTC 9-1 or DTC 9-2 double-check by jumping the service check connector and watching the SRS
indicator light (see page
).
DATA LINK CONNECTOR (16P)
HONDA PGM TESTER
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Troubleshooting - '96 - 98 Models
Reading the DTC (cont'd)
B. The SRS indicator light can also indicate the DTC by the number of blinks when the SCS service connector is connect-
ed to the service check connector (2P).
1. Turn the ignition switch OFF, and wait for 10 seconds. Then connect the SCS service connector to the service check
connector (2P). If you do not wait 10 seconds, the SRS unit will not be completely reset and will not output DTCs.
2. Turn the ignition switch ON (II). The SRS indicator light comes on for about 6 seconds and goes off. Then it will indi-
cate the DTC:
— The DTC consists of a main code and a sub-code.
— Including the most recent problem, up to three different malfunctions can be indicated.
— In case of a continuous failure, the DTC will be indicated repeatedly (see example 1 below).
— In case of an intermittent failure, the SRS indicator light will indicate the DTC one time, then it will stay on (see exam-
ple 2 below).
— If both a continuous and an intermittent failure occur, both DTCs will be indicated as continuous failures.
— In case the system is normal (no DTC), the SRS indicator light will stay on (see example 3).
3. Read the DTC.
4. Turn the ignition switch OFF, and wait for 10 seconds. Then disconnect the SCS service connector from the service
check connector (2P).
SCS SERVICE CONNECTOR
Examples of DTC Indications:
1. Continuous failure, SRS Indicator Light is:
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Erasing the DTC Memory
To erase the DTC(s) from the SRS unit, use a Honda
PGM Tester (see the Honda PGM Tester SRS vehicle
System Supplement) or the following procedure.
1. Make sure the ignition switch is OFF.
2. Connect the SCS service connector to the MES con-
nector (2P). Do not use a jumper wire.
Troubleshooting Intermittent
Failures
If there was a malfunction, but it doesn't recur, it will be
stored in the memory as an intermittent failure, and the
SRS indicator light comes on.
After checking the DTC, troubleshoot as follows:
1. Read the DTC (see "Reading the DTC").
2. Erase the DTC memory (see "Erasing the DTC
Memory").
3. With the shift lever in neutral, turn the ignition switch
ON (II), and let the engine idle.
4. The SRS indicator light comes on for about 6 sec-
onds and goes off.
5. Shake the wire harness and the connector, take a test
drive (quick acceleration, quick braking, cornering),
and turn the steering wheel fully left and right, and
hold it there for 5 to 10 seconds to find the cause of
the intermittent failure.
If the problem recurs, the SRS indicator light will
stay on.
6. If you can't duplicate the intermittent failure, the sys-
tem is OK at this time.
3. Turn the ignition switch ON (II).
4. The SRS indicator light comes on for about 6 seconds
and goes off. Remove the SCS service connector
from the MES connector (2P) within 4 seconds after
the SRS indicator light went off.
5. The SRS indicator light comes on again. Reconnect
the SCS service connector to the MES connector
(2P) within the 4 seconds after the SRS indicator
light comes on.
6. The SRS indicator light goes off. Remove the SCS
service connector from the MES connector (2P)
within 4 seconds.
7. The SRS indicator light indicates that the memory is
erased by blinking two times.
8. Turn the ignition switch OFF, and wait for 10 sec-
onds.
SCS SERVICE CONNECTOR
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