Reading fault codes using the DLC terminal box
1. Turn the ignition key to the OFF position, wait 10 seconds and connect the box to the diagnostic socket.
2. Connect a jumper between pins #4 and #9 of the box. Press the switch.
3. Turn the ignition key to the ON position (II). The SRS control lamp will light up and after 6 seconds will start flashing, giving a fault code, see fig. Write down the trouble code.
4. Turn the ignition key to the OFF position, wait 10 seconds and disconnect the box from the diagnostic socket.
Definition of a malfunction code
First flash approx. 6 sec. indicates the beginning of the code display. After 3 sec. after the first signal goes out, the main code is displayed. After 2 sec. after the end of the indication of the main code, the secondary code is displayed.
Examples:
1. Master code from 1 to 10
2. Master code 11 to 15
3. Secondary code
Fault code indication
The system can issue three fault codes, see example 1.
If the fault is determined to be permanent, the indication of the codes is repeated, see example 1.
If the fault is defined as temporary, after the code is displayed, the lamp lights up permanently, see example 2.
If permanent and temporary faults are detected, the indication of the codes is repeated, see example 1.
If no faults are found, the lamp goes out and after a while it starts to burn constantly, see example 3.
If there is no indication of codes and the lamp is on constantly without going out at the beginning of the test, this indicates a malfunction in the SRS lamp circuit.
If the lamp does not illuminate as described above, this may indicate a short in the SCS circuit. Check the circuit before starting the test.
Reading Trouble Codes with a Honda PGM Tester
Connect the Honda PGM tester to the 16-pin diagnostic socket. If the tester does not display DTCs, or if DTCs 9-1 and 9-2 are present, read the trouble codes using the SRS check lamp.
Erasing fault codes from memory
1. Turn the ignition key to the OFF position.
2. Connect the SCS connector (special tool) to the 2-pin MES connector to erase the memory.
3. Turn the ignition key to the ON position (II).
4. The SRS warning lamp will come on and go out for approx. after 6 seconds. Disconnect the SCS connector within 4 seconds after that.
5. The lamp will light up a second time. Connect the SCS connector within 4 seconds.
6. The lamp will turn off. Disconnect the SCS connector within 4 seconds after that.
7. The lamp will turn off and then flash 2 times to indicate the end of memory erasing. If the lamp lights up after 2 flashes, this indicates an incomplete erasing of fault codes.
8. Turn the ignition key to the OFF position and wait 2-3 seconds.
9. Erasing codes from memory is completed.
After the memory erasing is completed, turn the ignition key to the ON position (II). The SRS warning lamp should come on for approx. for 6 seconds and then turn off. Make sure within 30 sec. after that, it does not light up - this indicates that the trouble codes have been erased from memory and the system is working.
Diagnosis of temporary faults
Temporary failures are those that were detected by the system, but are not currently observed. Read fault codes and perform the following procedure.
1. Read fault codes, write them down and erase them from memory.
2. Turn the ignition key to the ON position (II), start the engine and let it run at idle speed. The SRS warning lamp will light up and after 6 seconds. will go out.
3. Move the electrical wiring and connectors from side to side, test while driving in different conditions (sharp acceleration and braking, turns). If there is a malfunction in the system, the SRS lamp will come on and stay on.
4. If the lamp lights up:
- Write down the conditions under which it lights up,
- Read fault codes and erase them from memory,
- Determine the problem based on the trouble codes and the conditions under which the lamp lights up. If this does not work right away, repeat 2-4 times.
5. If the lamp does not light up, the system is OK. However, if the same temporary fault is detected repeatedly, it is recommended to replace «suspicious» component.