YES -
Update the SH-AWD control unit if it does not have the latest software See: Powertrain Management/Transmission Control Systems/Relays and
Modules - Transmission and Drivetrain/Relays and Modules - Differential/Control Unit/Testing and Inspection/SH-AWD Control Unit Update, or
substitute a known-good SH-AWD control unit See: Powertrain Management/Transmission Control Systems/Relays and Modules - Transmission
and Drivetrain/Relays and Modules - Differential/Control Unit/Service and Repair, and recheck. If the symptom/indication goes away with the
updated SH-AWD control unit, troubleshooting is complete. If the symptom/indication goes away with a known-good SH-AWD control unit,
replace the original SH-AWD control unit See: Powertrain Management/Transmission Control Systems/Relays and Modules - Transmission and
Drivetrain/Relays and Modules - Differential/Control Unit/Service and Repair.?
NO -
Intermittent failure, the system is OK at this time.?
Adaptive Cruise Control
Adaptive Cruise Control (ACC) DTC Troubleshooting: 81
DTC 81:
Engine Control System (Including PCM) Malfunction
1. Check for PGM-FI System DTCs with the HDS.
Are any DTCs indicated?
YES -
Troubleshoot the indicated PGM-FI system DTC(s).?
NO -
Go to step 2.
2. Clear the DTCs with the HDS.
3. Test-drive the vehicle with the adaptive cruise control (ACC) activated.
4. Check for DTCs with the HDS.
Is DTC 81 indicated?
YES -
Check for loose or poor connections. If OK, update the ACC unit See: Cruise Control/Testing and Inspection/Programming and Relearning, then
recheck. If the ACC unit was already updated, replace the ACC unit See: Cruise Control/Cruise Control Module/Service and Repair.?
NO -
Intermittent failure, the system is OK at this time. Check for loose or poor connections.?
TPMS System
TPMS DTC Troubleshooting: 81
DTC 81:
TPMS Control Unit Failure
NOTE: Low battery voltage can cause this DTC. Make sure the battery is fully charged and in good condition See: Starting and
Charging/Battery/Testing and Inspection/Component Tests and General Diagnostics/Battery Test.
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch to LOCK (0), then turn the ignition switch to ON (II) again.
4. Check for DTCs with the HDS.
