DTC 85-61: No Signal From the ODS Unit; DTC 85-62: Incorrect Data From the ODS Unit

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Before doing this troubleshooting procedure, find out if the vehicle was in a collision. If so, verify that all the required components were replaced with new components, of the correct part number, and that they were properly installed (see COMPONENT REPLACEMENT/INSPECTION AFTER DEPLOYMENT ).
Before doing this troubleshooting procedure, review SRS PRECAUTIONS AND PROCEDURES , GENERAL TROUBLESHOOTING INFORMATION and Battery Terminal Disconnection and Reconnection (see USING THE GR8 BATTERY DIAGNOSTIC STATION ).
Before replacing the SRS unit, check the SRS unit software version with the HDS. If the software version is not the latest, update the SRS unit software (see SRS UNIT UPDATE ), and retest.

Clear the DTCs with the HDS (see HOW TO CLEAR DTCS ).
Turn the ignition switch to ON (II), then wait for 10 seconds.
Check for DTCs with the HDS (see HOW TO CLEAR DTCS ).
Is DTC 85-61 or 85-62 indicated?

YES -Go to step 5.

NO -Intermittent failure, the system is OK at this time. Go to TROUBLESHOOTING INTERMITTENT FAILURES . If another DTC is indicated, troubleshoot the DTC.
Turn the ignition switch to LOCK (0).
Check the No. 2 (7.5 A) fuse in the auxiliary under-dash fuse holder 2.
Is the fuse OK?

YES -Go to step 6.

NO -Replace the fuse, then turn the ignition switch to ON (II). If the fuse blows again, check for short in the auxiliary under-dash fuse holder 2 No. 2 (7.5 A) fuse circuit (right engine compartment wire harness, floor wire harness, or ODS unit harness).
Disconnect the ODS unit harness 18P connector (A) from the ODS unit (B).

Fig 1: Identifying ODS Unit Harness 18P Connector And ODS Unit
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Turn the ignition switch to ON (II).
Measure the voltage between body ground and ODS unit harness 18P connector terminal No. 1.

Fig 2: Measuring Voltage Between Body Ground And ODS Unit Harness 18P Connector Terminal No. 1
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES -Go to step 9.

NO -Open between the No. 2 (7.5 A) fuse in the auxiliary under-dash fuse holder 2 and the ODS unit harness 18P connector terminal No. 1 (right engine compartment wire harness, floor wire harness, or ODS unit harness); replace the faulty harness, then clear the DTC.
Turn the ignition switch to LOCK (0).
Measure the resistance between body ground and ODS unit harness 18P connector terminal No. 12.

Fig 3: Measuring Resistance Between Body Ground And ODS Unit Harness 18P Connector Terminal No. 12
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there less than 1.0 Ω?

YES -Go to step 11.

NO -Open in the wire harness between ODS unit harness 18P connector terminal No. 12 and body ground (G605) (floor wire harness, or ODS unit harness) or poor connection at G605; if the connection is OK, replace the faulty harness, then clear the DTC.
Disconnect the negative cable from the battery, then wait at least 3 minutes.
Vehicles with ACC: Disconnect E-Pretensioner unit connector B(14P) from the E-Pretensioner unit (see E-PRETENSIONER UNIT REPLACEMENT ).
Disconnect SRS unit connector B (39P) from the SRS unit (see DISCONNECTING SYSTEM CONNECTORS ).
Measure the resistance between body ground and SRS unit connector B (39P) terminal No. 1.

Fig 4: Measuring Resistance Between Body Ground And SRS Unit Connector B (39P) Terminal No. 1
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there an open circuit or at least 1 MΩ?

YES -Go to step 15.

NO -Short to ground between SRS unit connector B (39P) terminal No. 1 and ODS unit harness 18P connector terminal No. 7 (floor wire harness, or ODS unit harness); replace the faulty harness, then clear the DTC.
Measure the resistance between SRS unit connector B (39P) terminal No. 1 and ODS unit harness 18P connector terminal No. 7.

Fig 5: Measuring Resistance Between SRS Unit Connector B (39P) Terminal No. 1 And Ods Unit Harness 18P Connector Terminal No. 7
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there less than 1.0 Ω?

YES -Go to step 16.

NO -Open in the wire harness between SRS unit connector B (39P) terminal No. 1 and ODS unit harness 18P connector terminal No. 7 (floor wire harness, or ODS unit harness); replace the faulty harness, then clear the DTC.
Reconnect the negative cable to the battery.
Turn the ignition switch to ON (II).
Measure the voltage between body ground and SRS unit connector B (39P) terminal No. 1.

Fig 6: Measuring Voltage Between Body Ground And SRS Unit Connector B (39P) Terminal No. 1
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there less than 0.2 V?

YES -Go to step 19.

NO -Short to power between SRS unit connector B (39P) terminal No. 1 and ODS unit harness 18P connector terminal No. 7 (floor wire harness, or ODS unit harness); replace the faulty harness, then clear the DTC.
Replace the ODS unit (see ODS UNIT REPLACEMENT ).
Clear the DTCs with the HDS (see HOW TO CLEAR DTCS ).
Check for DTCs with the HDS (see HOW TO CLEAR DTCS ).
Is the DTC 85-61 or 85-62 indicated?

YES -Replace the SRS unit (see SRS UNIT REPLACEMENT ).

NO -The system is OK at this time.