- "Pre-Collision System Unavailable"
- "Pre-Collision System Unavailable Clean Sensor"
- "Front Camera Unavailable"
- "Front Camera System Unavailable Clean Windshield"
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM1000000018YAX |
| Model Year Start: 2018 | Model: Sienna | Prod Date Range: [11/2017 - ] |
| Title: PRE-COLLISION: PRE-COLLISION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING; 2018 - 2020 MY Sienna [11/2017 - ] | ||
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HOW TO PROCEED WITH TROUBLESHOOTING |
CAUTION / NOTICE / HINT
HINT:
- Use these procedures to troubleshoot the pre-collision system.
- *: Use the Techstream.
PROCEDURE
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1. |
VEHICLE BROUGHT TO WORKSHOP |
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2. |
INSPECT BATTERY VOLTAGE |
(a) Measure the battery voltage.
Standard Voltage:
11 to 14 V
If the voltage is below 11 V, replace or recharge the battery before proceeding to the next step.
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3. |
INSPECT MILLIMETER WAVE RADAR SENSOR ASSEMBLY (BEAM AXIS MISALIGNMENT READING)* |
(a) Adjust the reflector height.
Click here
![2018 - 2020 MY Sienna [11/2017 - ]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: ADJUSTMENT](/t3Portal/stylegraphics/info.gif)
(b) Place the reflector.
Click here
(c) Connect the Techstream to the DLC3.
(d) Turn the ignition switch to ON.
(e) Turn the Techstream on.
(f) Turn the cruise control main switch on.
(g) Enter the following menus: Body Electrical / Pre-Collision 2 / Utility / Front Beam Axis Misalignment Reading.
(h) Check the amount of misalignment and make a note.
Body Electrical > Pre-Collision 2 > Utility
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Tester Display |
|---|
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Front Beam Axis Misalignment Reading |
(i) Enter the following menus: Body Electrical / Pre-Collision 2 / Utility / Front Beam Axis Offset Reading.
(j) Check the amount of offset and make a note.
Body Electrical > Pre-Collision 2 > Utility
|
Tester Display |
|---|
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Front Beam Axis Offset Reading |
(k) Calculate the "Dealership Axis Offset Angle (with On-line Calibration Angle)" using the values "Front Beam Axis Misalignment Reading" and "Front Beam Axis Offset Reading".
(1) "Dealership Axis Offset Angle (with On-line Calibration Angle)" = "Front Beam Axis Misalignment Reading" - "Front Beam Axis Offset Reading"
Standard:
Dealership Axis Offset Angle (with On-line Calibration Angle)
|
Vertical |
-2.2 to 1.6 deg. |
|
Horizontal |
-0.6 to 0.6 deg. |
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Result |
Proceed to |
|---|---|
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The dealership axis offset angle (with on-line calibration angle) is within the specified range. |
A |
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The dealership axis offset angle (with on-line calibration angle) is not within the specified range. |
B |
| B |
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4. |
CHECK CAN COMMUNICATION SYSTEM* |
(a) Using the Techstream, check if the CAN communication system is functioning normally.
HINT:
Refer to CAN Bus Check in CAN Communication System.
Click here
OK:
CAN communication system is functioning normally.
| NG |
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5. |
INSPECT WARNING LIGHT |
(a) Check the condition of the warning lights on the combination meter assembly.
|
Result |
Proceed to |
|---|---|
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Only the PCS warning light is illuminated or blinking |
A |
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The PCS warning light is not illuminated or blinking |
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The PCS warning light and other warning lights are illuminated or blinking |
B |
| B |
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GO TO MALFUNCTIONING SYSTEM |
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6. |
INSPECT MULTI-INFORMATION DISPLAY |
(a) Check if a pre-collision system warning message is displayed on the multi-information display in the combination meter assembly.
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Result |
Proceed to |
|---|---|
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"Pre-Collision System Malfunction Contact Your Dealer" is displayed |
A |
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Any of the following messages is displayed: |
B |
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Warning message is not displayed |
C |
| B |
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| C |
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7. |
CHECK FOR DTCs* (PRE-COLLISION SYSTEM) |
HINT:
Refer to DTC Check / Clear.
Click here
(a) Check for DTCs and note any codes that are output.
Body Electrical > Pre-Collision 2 > Trouble Codes
(b) Clear the DTCs.
Body Electrical > Pre-Collision 2 > Clear DTCs
(c) Recheck for DTCs.
(1) Attempt to duplicate the malfunction and check if the DTCs are output again.
Body Electrical > Pre-Collision 2 > Trouble Codes
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Result |
Proceed to |
|---|---|
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Malfunction is duplicated but DTCs are not output |
A |
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Malfunction cannot be duplicated and DTCs are not output |
B |
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DTCs are output |
C |
| B |
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| C |
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8. |
PROBLEM SYMPTOMS TABLE |
HINT:
Refer to Problem Symptoms Table.
Click here
|
Result |
Proceed to |
|---|---|
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Fault is not listed in Problem Symptoms Table |
A |
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Fault is listed in Problem Symptoms Table |
B |
| B |
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9. |
OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Terminals of ECU
Click here
(b) Data List / Active Test
Click here
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10. |
ADJUST, REPAIR OR REPLACE |
NOTICE:
When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the radar sensor beam axis must be performed.
Click here
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11. |
CONFIRMATION TEST |
| NEXT |
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END |
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12. |
ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY |
(a) Perform millimeter wave radar sensor assembly adjustment.
Click here
| NEXT |
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