Reading and Clearing Diagnostic Trouble Codes
General Troubleshooting InformationDTC (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 comes 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 memory even when the ignition switch is turned off or if the battery is disconnected.
NOTE: The SRS indicator may go out depending on the code if the problem is intermittent, but the code will remain in memory.
- The SRS indicator is either latchable or resettable, depending on the DTC. When latchable, the SRS indicator turns on and stays on whenever the ignition switch is in the ON position, or until the DTC is cleared. When resettable, the SRS indicator turns on when the DTC is set. It will not turn on after the ignition switch is cycled from ON to OFF if the problem is intermittent and goes away, but the DTC will remain in memory until cleared.
- The "x" at the end of each DTC denotes a numeric character (0 thru 9) or an alpha character (A thru F) that is displayed on the HDS.
- When you use the HDS, 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
- Make sure the battery is sufficiently charged. If the battery is dead or low, measuring values may not be correct.
- Use only a digital multimeter to check the system. If it's not a Honda multimeter, make sure it's output is 10 mA (0.01 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 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, both side curtain airbag connectors, and both seat belt tensioner connectors.
- Do not touch a tester probe to the terminals in the SRS unit or harness connectors, and do not connect the SRS unit terminals or the sensor terminals with a jumper wire. Use only the backprobe set and the multimeter. Backprobe spring-loaded lock type connectors correctly.
Reading the DTC
1. Make sure the ignition switch is OFF.
2. Connect the HDS to the data link connector (DLC) (A).
3. Turn the ignition switch ON (II).
4. Use the HDS to check for SRS DTCs.
NOTE: SWS DTC assists SRS DTC. Therefore, do troubleshoot correspond to SRS DTC.
5. Read the DTC.
6. Turn the ignition switch OFF, and wait for 10 seconds.
7. Disconnect the HDS from the DLC.
8. Do the troubleshooting procedure for the DTC.
Clear the DTC Memory with the HDS
1. Make sure the ignition switch is OFF.
2. Connect the HDS to data link connector (DLC) (A).
3. Turn the ignition switch ON (II).
4. In the TEST MODE MENU of the HDS, select DTC CLEAR. This clears the DTC(s).
5. Turn the ignition switch OFF, and wait for 10 seconds.
6. Disconnect the HDS from the DLC.
Clear the DTC Memory Using MES Connector without the HDS
Special Tools Required
SCS service connector 07PAZ-001010A
1. Make sure the ignition switch is OFF.
2. Connect the SCS service connector (A) to the yellow MES connector (2P) (B). Do not use a jumper wire.
3. Turn the ignition switch ON (II).
4. The SRS indicator comes on for about 6 seconds, and then goes off. Remove the SCS service connector from the MES connector within 4 seconds after the indicator goes off.
5. The SRS indicator will come on again. Reconnect the SCS service connector to the MES connector within 4 seconds after the indicator comes on.
6. When the SRS indicator goes off, remove the SCS service connector from the MES connector within 4 seconds.
7. The SRS indicator blinks two times, indicating that the memory has been cleared.
8. Turn the ignition switch OFF, and wait for 10 seconds.
9. Turn the ignition switch ON (II) again. If the SRS indicator comes on for 6 seconds, and then goes off, the system is OK.
Checking the Front Passenger's Weight Sensors after a Vehicle Collision
1. Position the front passenger's seat to the rearmost position, adjust the recliner to the forwardmost position. Do not move the seat from this position.
2. Drive the vehicle, accelerate to 20 mph (36 km/h), then stop on level ground.
3. Make sure the ignition switch is OFF.
4. Connect the HDS to the data link connector (DLC) (A).
5. Turn the ignition switch ON (II).
6. From the SRS inspection menu, select Seat Weight Sensor, then Misc Test, then "SEAT OUTPUT CHK." and follow the prompts until the ODS operation check has completed.