DTC Troubleshooting: 15-1

DTC 15-1:  Faulty OPDS Unit

1.Make sure nothing is on the front passenger's seat.

2.Initialize the OPDS unit.

3.Erase the DTC memory.

4.Read the DTC.

Is DTC 15-1 indicated?


YES - Go to 5.


NO - Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures.


5.Check the No. 9 (7.5A) fuse in the under-dash fuse/relay box.

Is the fuse OK?


YES - Go to 6.


NO - Go to 9.


6.Disconnect the O1o connector (1) from the OPDS unit (A).

 

7.Turn the ignition switch ON (II).

8.Check for voltage between the No. 4 terminal of the O1o connector and body ground. There should be battery voltage.

 

Is there battery voltage?


YES - Go to 16.


NO - Open in the floor wire harness or in the OPDS unit harness; replace the faulty harness.n


9.Replace the No. 9 (7.5A) fuse in the under-dash fuse/relay box.

10.Turn the ignition switch ON (II) for 30 seconds, then turn it OFF.

11.Check the No. 9 (7.5A) fuse in under-dash fuse/relay box.

Is the fuse OK?


YES - Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures.


NO - Go to 12.


12.Replace the No. 9 (7.5A) fuse in the under-dash fuse/relay box.

13.Disconnect the O1o connector (1) from the OPDS unit (A).

 

14.Turn the ignition switch ON (II) for 30 seconds, then turn it off.

15.Check the No. 9 (7.5 A) fuse in the under-dash fuse/relay box.

Is the fuse OK?


YES - Short to ground in the  OPDS unit; replace the OPDS unit.n


NO - Short to ground in the No. 9 (7.5 A) circuit.n


16.Turn the ignition switch OFF.

17.Check resistance between the No. 8 terminal of the O1o connector and body ground. There should be 0-1.0 W.

 

Is the resistance as specified?


YES - Go to 18.


NO - Open in floor wire harness or OPDS unit harness, or poor ground ( G551). If the G551 is OK, replace the faulty harness.n

18.Disconnect the battery negative cable, and wait for 3 minutes.

19.Disconnect the SDo and SPo connectors (1).

 

20.Disconnect the U2o connector (1) from the SRS unit (A).

 

21.Check resistance between the No. 3 terminal of U2o connector and body ground. There should be 1 MW or more.

 

Is the resistance as specified?


YES - Go to 22.


NO - Short to ground in the floor wire harness or OPDS unit harness; replace the faulty harness.n

22.Check resistance between the No. 3 terminal of U2o connector and the No. 7 terminal of the O1o connector. There should be 0-1.0 W.

 

Is the resistance as specified?


YES - Go to 23.


NO - Open in the floor wire harness or in the OPDS unit harness; replace the faulty harness.n

23.Disconnect the F1o connector (1) from the under-dash fuse/relay box.

 

24.Reconnect the negative battery cable.

25.Turn the ignition switch ON (II).

26.Check for voltage between the No. 3 terminal of U2o connector and body ground. There should be 0.5 V or less.

 

Is the voltage as specified?


YES - Go to 27.


NO - Short to power in the floor wire harness or in the OPDS unit harness; replace the faulty harness.n


27.Replace the OPDS unit, then intialize the system.

28.Erase the DTC memory, then check for DTC 15-1.

Is DTC 15-1 indicated?


YES - Replace the SRS unit.n


NO - The system is OK.n