Is there continuity?
YES -
Check for loose terminals and poor connections at the TPMS control unit. If necessary, substitute a known-good TPMS control unit See:
Instrument Panel, Gauges and Warning Indicators/Tire Monitoring System/Tire Pressure Module/Service and Repair, and recheck.?
NO -
Repair an open in the wire between the TPMS control unit and the PCM.?
85-4x
SRS DTC Troubleshooting: 85-4x, 85-63, 85-64
DTC 85-4x ("x" can be 0 thru 9 or A thru F), 85-63, 85-64:
Internal Failure of the ODS Unit
NOTE:
- Before doing this troubleshooting procedure, review SRS Precautions and Procedures See: Body and Frame/Air Bag(s) Arming and
Disarming/Service and Repair and General Troubleshooting Information See: Restraints and Safety Systems/Air Bag Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes.
- 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: Restraints and Safety Systems/Air Bag Systems/Testing and Inspection/Programming and Relearning/SRS Unit Update,
and retest.
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to ON (II), then wait for 10 seconds.
3. Check for DTCs with the HDS.
Is DTC 85-4x, 85-63, or 85-64 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.?
4. Clear the DTCs with the HDS.
5. Do the ODS unit initialization See: Restraints and Safety Systems/Air Bag Systems/Testing and Inspection/Programming and
Relearning/ODS Unit Initialization.
