How to Troubleshoot DTCs
Check and clear the DTCs with the HDS.
Note. When both the ACC and CMBS indicators come on, do the ACC system troubleshooting first (except DTC 100).
Before troubleshooting, check and note these items
- Ask the client about the conditions when the problem occurred, and try to reproduce the same conditions for troubleshooting.
- If the symptom does not appear and the CMBS indicator does not come on during the test-drive, but troubleshooting is done based on the DTC, check for poor connections or loose terminals at all connectors related to the circuit that you are troubleshooting.
- After the troubleshooting or repairs are done, clear the DTCs, and test-drive the vehicle under the same conditions as when the DTC was originally.
- The ACC system and the CMBS may sometimes stop working because of the environment (weather, road conditions, driving conditions, etc.). A DTC may be stored in these cases.
DTCs that may be stored even when the system is normal
DTC 88: ACC indicator does not come on, CMBS indicator comes on
The millimeter wave radar overheats, the power supply voltage for the millimeter wave radar is low, or there is a communication error between the ACC unit and the millimeter wave radar.
DTC 95: ACC indicator does not come on, CMBS indicator comes on
Battery voltage is too high.
DTC 96: ACC indicator does not come on, CMBS indicator comes on
Battery voltage is too low.
DTC 97: ACC indicator does not come on, CMBS indicator comes on
Extensive driving on a rough road or the ignition switch is turned ON (ID/OFF.
DTC 102: ACC indicator does not come on, CMBS indicator comes on
Parking brake not fully released, or driving with the parking brake stuck.
Scheme 4
- With the ignition switch is in LOCK (0), connect the HDS to the data link connector (DLC) (A) under the left side of the dashboard.
- Turn the ignition switch to ON (II).
- Make sure the HDS communicates with the vehicle and the ACC unit. If it does not communicate, troubleshoot the DLC circuit (see «DLC CIRCUIT TROUBLESHOOTING»(ref-348508-S35625078472009112400000) ).
- Follow the prompts on the HDS to display the DTC(s) on the screen. After determining the DTC, refer to «DTC TROUBLESHOOTING»(ref-348611-S25993596642009112400000) . NOTE: See the HDS Help menu for specific instructions.
DTC Troubleshooting Index
| DTC | Detection Item | Adaptive Cruise Control (ACC) Indicator | CMBS Indicator |
|---|---|---|---|
| 11 | Left rear wheel sensor problem | O | O |
| 12 | Right rear wheel sensor problem | O | O |
| 13 | Left front wheel sensor problem | O | O |
| 14 | Right front wheel sensor problem | O | O |
| 20 | Steering angle sensor malfunction | O | |
| 21 | Yaw rate-lateral/longitudinal acceleration sensor malfunction | O | O |
| 22 | Yaw rate-lateral/longitudinal acceleration sensor center position revision value error | O | O |
| 23 | Yaw rate-lateral/longitudinal acceleration sensor gain error | O | O |
| 25 | Yaw rate-lateral/longitudinal acceleration sensor stabilizing malfunction | O | O |
| 26 | Steering angle sensor adherence failure | O | |
| 30 | Adaptive cruise control (ACC) relay circuit malfunction | O | O |
| 34 | Master cylinder brake fluid pressure sensor circuit open/short | O | |
| 35 | Master cylinder brake fluid pressure sensor center position error | O | |
| 36 | Master cylinder brake fluid pressure sensor shift error | O |
DTC TROUBLESHOOTING TABLE
Note. When both the ACC and CMBS indicators come on, do the ACC system troubleshooting first (except DTC 100).
| DTC | Detection Item | Adaptive Cruise Control (ACC) Indicator | CMBS Indicator |
|---|---|---|---|
| 60 | Communication line error | O | O |
| 61 | Millimeter wave radar communication error | O | O |
| 62 | Millimeter wave radar sensor error | O | O |
| 63 | Millimeter wave radar aiming error | O | O |
| 64 | CMBS operation error (excessive operation) | O | |
| 88 | Millimeter wave radar out of detection area | O | |
| 90 | A/T system and/or PGM-FI system malfunction | O | |
| 95 | Power supply voltage too high | O | |
| 96 | Power supply voltage too low | O | |
| 97 | CMBS offset cancel timeout | O | |
| 100 | CMBS initial check incomplete | O | O |
| 102 | CMBS parking brake incomplete releasing | O | |
| 103 | CMBS brake control prohibition | O | |
| 105 | Dust or dirt on the millimeter wave radar | O | |
| 107 | Millimeter wave radar aiming incomplete | O | O |
| 110 | Lost communication with the PCM (PGM-FI system) | O | |
| 111 | Lost communication with the PCM (A/T system) | O | |
| 112 | Lost communication with the VSA modulator-control unit | O | |
| 113 | Lost communication with the gauge control module | O | |
| 115 | Lost communication with the SH-AWD control unit | O | |
| 117 | Lost communication with the steering angle sensor | O |
CMBS INDICATOR REFERENCE TABLE
Note. When both the ACC and CMBS indicators come on, do the ACC system troubleshooting first (except DTC 100).
Symptom Troubleshooting Index
| Symptom | Diagnostic procedure | Also check for |
|---|---|---|
| CMBS OFF switch does not turn on/turn off (CMBS indicator does not change) | Adaptive cruise control (ACC) system troubleshooting (No DTC Indication) (see ADAPTIVE CRUISE CONTROL (ACC) SYSTEM TROUBLESHOOTING (NO DTC INDICATION) ). Test the CMBS OFF switch (see CMBS OFF SWITCH TEST/REPLACEMENT ). Do the gauge control module self-diagnostic function (see SELF-DIAGNOSTIC FUNCTION ). | An open in the wire A short in the wire |
| The MID does not indicate when the CMBS OFF switch is operated | Adaptive cruise control (ACC) system troubleshooting (No DTC Indication) (see ADAPTIVE CRUISE CONTROL (ACC) SYSTEM TROUBLESHOOTING (NO DTC INDICATION) ). Test the CMBS OFF switch (see CMBS OFF SWITCH TEST/REPLACEMENT ). Do the gauge control module self-diagnostic function (see SELF-DIAGNOSTIC FUNCTION ). | An open in the wire A short in the wire |
| The buzzer does not sound | Adaptive cruise control (ACC) system troubleshooting (No DTC Indication) (see ADAPTIVE CRUISE CONTROL (ACC) SYSTEM TROUBLESHOOTING (NO DTC INDICATION) ). Do the gauge control module self-diagnostic function (see SELF-DIAGNOSTIC FUNCTION ). | |
| The buzzer does not sound when the CMBS OFF switch is operated | Adaptive cruise control (ACC) system troubleshooting (No DTC Indication) (see ADAPTIVE CRUISE CONTROL (ACC) SYSTEM TROUBLESHOOTING (NO DTC INDICATION) ). Do the gauge control module self-diagnostic function (see SELF-DIAGNOSTIC FUNCTION ). | |
| The MID does not indicate with the CMBS operating | Adaptive cruise control (ACC) system troubleshooting (No DTC Indication) (see ADAPTIVE CRUISE CONTROL (ACC) SYSTEM TROUBLESHOOTING (NO DTC INDICATION) ). Do the gauge control module self-diagnostic function (see SELF-DIAGNOSTIC FUNCTION ). | |
| The CMBS system operates frequently | Adaptive cruise control (ACC) system troubleshooting (No DTC Indication) (see ADAPTIVE CRUISE CONTROL (ACC) SYSTEM TROUBLESHOOTING (NO DTC INDICATION) ). Check the millimeter wave radar. Check the front emblem for warpage. Check the wheel alignment. | Driving condition, weather, environmental influence |
| The CMBS system operated without danger of collision | Adaptive cruise control (ACC) system troubleshooting (No DTC Indication) (see ADAPTIVE CRUISE CONTROL (ACC) SYSTEM TROUBLESHOOTING (NO DTC INDICATION) ). Check the millimeter wave radar. Check the front emblem for warpage. Check the wheel alignment. | Driving condition, weather, environmental influence |
| The CMBS system didn't operate | Adaptive cruise control (ACC) system troubleshooting (No DTC Indication) (see ADAPTIVE CRUISE CONTROL (ACC) SYSTEM TROUBLESHOOTING (NO DTC INDICATION) ). Check the millimeter wave radar. Check the front emblem for warpage. Check the wheel alignment. | Driving conditions, weather, environmental influences Undetectable environment |
| CMBS indicator does not come on | Do the gauge control module self-diagnostic function (see SELF-DIAGNOSTIC FUNCTION ). | |
| CMBS indicator does not go off | Symptom troubleshooting (see SYMPTOM TROUBLESHOOTING ). | |
| HDS does not communicate with the adaptive cruise control (ACC) unit or the vehicle | Troubleshoot the DLC circuit (see DLC CIRCUIT TROUBLESHOOTING ). |
SYMPTOM TROUBLESHOOTING TABLE
DTC 20: Steering Angle Sensor Malfunction
Note. Before doing this troubleshooting procedure, check the steering angle sensor installation (see STEERING ANGLE SENSOR REPLACEMENT ).
- Turn the ignition switch to ON (II).
- Check for VSA system DTCs with the HDS. Are any DTCs indicated? YES - Troubleshoot the indicated VSA system DTC(s). NO - Go to step 3 .
- Clear the DTCs with the HDS.
- Turn the ignition switch to LOCK (0), then turn the ignition switch to ON (II).
- Turn the steering wheel from lock-to-lock.
- Check the DTCs with the HDS. Is DTC 73 indicated? YES - Go to step 7 . NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections.
- Check the CALIBRATION STATUS OF STEERING ANGLE SENSOR in the DATA LIST with the HDS. Is NOT COMPLETE indicated? YES - Do the steering neutral position memorization procedure (see «VSA SENSOR NEUTRAL POSITION MEMORIZATION»(ref-348550-S14170384032009112400000) ). NO - Faulty steering angle sensor; replace the steering angle sensor (see «STEERING ANGLE SENSOR REPLACEMENT»(ref-348550-S19097850032009112400000) ).
DTC 26: Steering Angle Sensor Adherence Failure
Note. Before doing this troubleshooting procedure, check the steering angle sensor installation.
- Turn the ignition switch to ON (II).
- Check for VSA system DTCs with the HDS. Are any DTCs indicated? YES - Troubleshoot the indicated VSA system DTC(s). NO - Go to step 3 .
- Check the STEERING ANGLE in the DATA LIST with the HDS, turn the steering wheel from lock-to-lock. Are any value change? YES - Faulty steering angle sensor; replace the steering angle sensor (see «STEERING ANGLE SENSOR REPLACEMENT»(ref-348550-S19097850032009112400000) ). NO - Faulty ACC unit; replace the ACC unit (see «ADAPTIVE CRUISE CONTROL (ACC) UNIT REMOVAL/INSTALLATION»(ref-348552-S13439405742009112400000) ).
DTC 34, 35, 36: Master Cylinder Brake Fluid Pressure Sensor Circuit Open/Short; Master Cylinder Brake Fluid Pressure Sensor Center Position Error; Master Cylinder Brake Fluid Pressure Sensor Shift Error
- Turn the ignition switch to ON (II).
- Clear the DTCs with the HDS.
- Watch the adaptive cruise control (ACC) indicator. Does the ACC indicator stay off? YES - Intermittent failure, the system is OK at this time. Check for loose or poor connections. NO - Go to step 4 .
- Press the brake pedal.
- Watch the ACC indicator. Does the ACC indicator stay off? YES - Intermittent failure, the system is OK at this time. Check for loose or poor connections. NO - Go to step 6 .
- Check for DTCs with the HDS. Is DTC 34, 35 or 36 indicated? YES - Go to step 7 . NO - Troubleshoot the indicated DTC.
- With the brake pedal released, check the master cylinder brake fluid pressure voltage (BRAKE P) with the HDS. Is there about 0.5 V? YES - Go to step 8 . NO - Check the VSA system.
- Test the brake booster (see «BRAKE BOOSTER TEST»(ref-348510-S17151465292009112400000) ).
- Press the brake pedal with about 314 N (32 kgf, 70.6 lbf) pressure.
- Check the master cylinder brake fluid pressure voltage (BRAKE P) with the HDS. Is there about 2.5 V? YES - Go to step 11 . NO - Check the VSA system.
- Check the brake switch signal (BRAKE SW (N.O.)) with the HDS. Does the indication show ON when the brake pedal is pressed, and show OFF when the brake pedal is released? YES - Check for loose or poor connections. If OK, replace the ACC unit (see «ADAPTIVE CRUISE CONTROL (ACC) UNIT REMOVAL/INSTALLATION»(ref-348552-S13439405742009112400000) ). NO - Go to step 12 .
- Check for DTCs with the HDS. Is DTC 60, 110, or 111 indicated? YES - Troubleshoot the indicated DTC(s). NO - Troubleshoot the brake pedal position switch signal circuit (see «BRAKE PEDAL POSITION SWITCH SIGNAL CIRCUIT TROUBLESHOOTING»(ref-348529-S14693931382009112400000) ).
DTC 100: CMBS Initial Check Incomplete
Note. The CMBS initial check function checks the communication between the adaptive cruise control (ACC) unit and VSA modulator-control unit. If the CMBS initial check is incomplete, the ACC and CMBS indicators come on. For the CMBS to operate properly, always do the CMBS initial check after replacing the ACC unit or the VSA modulator-control unit.
- Turn the ignition switch to ON (II).
- Watch the VSA indicator. Does the VSA indicator come on? YES - Troubleshoot the indicated VSA system DTC(s). NO - Go to step 3 .
- Check for VSA system DTCs with the HDS. Are any DTCs indicated? YES - Troubleshoot the indicated VSA system DTC(s). NO - Go to step 4 .
- Start the engine.
- Select CMBS from the DRIVING SUPPORT menu, then enter the MISCELLANEOUS TEST.
- Do the CMBS brake forced operation.
- Watch the ACC and CMBS indicators. Do both indicators come on? YES - Go to step 8 . NO - The system is OK at this time. The CMBS initial check is complete.
- Check for ACC system DTCs with the HDS. Are any DTCs except DTC 100 indicated? YES - Troubleshoot the indicated DTC(s). NO - Check for loose or poor connections. If OK, replace the ACC unit (see «ADAPTIVE CRUISE CONTROL (ACC) UNIT REMOVAL/INSTALLATION»(ref-348552-S13439405742009112400000) ).
DTC 103: CMBS Brake Control Prohibition
- Turn the ignition switch to ON (II).
- Check for VSA system DTCs with the HDS. Are any DTCs indicated? YES - Troubleshoot the indicated VSA system DTC(s). NO - Go to step 3 .
- Clear the DTCs with the HDS.
- Watch the CMBS indicator. Does the CMBS indicator come on? YES - Go to step 5 . NO - The system is OK at this time.
- Check for adaptive cruise control (ACC) system DTCs with the HDS. Is DTC 103 indicated? YES - Check for loose or poor connections. If OK, replace the ACC unit (see «ADAPTIVE CRUISE CONTROL (ACC) UNIT REMOVAL/INSTALLATION»(ref-348552-S13439405742009112400000) ). NO - Troubleshoot the indicated DTC.
Scheme 5
- Clear the DTCs with the HDS.
- Turn the ignition switch to ON (II).
- Check for DTCs with the HDS. Is DTC 117 indicated? YES - Go to step 4 . NO - Intermittent failure. The system is OK at this time. Check for loose or poor connections.
- Check for VSA system DTCs with the HDS. Are any DTCs indicated? YES - Troubleshoot the indicated VSA system DTC(s). NO - Go to step 5 .
- Disconnect the dashboard wire harness 5P connector from the steering angle sensor (see «STEERING COLUMN REMOVAL AND INSTALLATION»(ref-348511-S08332992362009112400000) ).
- Disconnect the dashboard wire harness 20P connector from the adaptive cruise control (ACC) unit (see «ADAPTIVE CRUISE CONTROL (ACC) UNIT REMOVAL/INSTALLATION»(ref-348552-S13439405742009112400000) ).
- Check for continuity between ACC unit 20P connector terminal No. 10 and steering angle sensor 5P connector terminal No. 2, and between ACC unit 20P connector terminal No. 20 and steering angle sensor 5P connector terminals No. 4. Is there continuity? YES - Faulty ACC unit; replace the ACC unit (see «ADAPTIVE CRUISE CONTROL (ACC) UNIT REMOVAL/INSTALLATION»(ref-348552-S13439405742009112400000) ). NO - Open in the dashboard wire harness; replace the dashboard wire harness.