Lexus NX: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Use these procedures to troubleshoot the LIN communication system.
- *: Use the Techstream.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
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| 2. | INSPECT AUXILIARY BATTERY VOLTAGE |
(a) Measure the auxiliary battery voltage with the power switch off.
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding.
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| 3. | CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* |
(a) Using the Techstream, check the CAN communication function to ensure that there are no malfunctions in the communication system.
Click here .gif)
| DTCs output | .gif) | GO TO CAN COMMUNICATION SYSTEM |
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| 4. | CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM* |
(a) Using the Techstream, check the LIN communication function to ensure that there are no malfunctions in the communication system.
| DTCs output | | GO TO DIAGNOSTIC TROUBLE CODE CHART |
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| 5. | PROBLEM SYMPTOMS TABLE |
(a) Refer to the Problem Symptoms Table.
Click here
| Fault is listed in problem symptoms table | | ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE |
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| 6. | OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Data List / Active Test
Click here
(b) Terminals of ECU
Click here
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| 7. | ADJUST, REPAIR OR REPLACE |
| NEXT | | END |
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Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT:
Use the table below to help determine the cause of the problem symptom. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order
Terminals Of Ecu
TERMINALS OF ECU CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (a) Remove the main body ECU (multiplex network body ECU). Click here *1 Main Bo
Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTC (a) Check main body ECU (multiplex network body ECU) (1) Connect the Techstream to the DLC3. (2) Turn the power switch on (IG). (3) Turn the Techstream on. (4) Enter the fo
SEE MORE:
Rear Sensor Communication Malfunction (C1AED)
DESCRIPTION This DTC is stored when there is an open or short circuit in the communication line between the rear sensors and the ECU, or when there is a malfunction in a rear sensor. DTC No. Detection Item DTC Detection Condition Trouble Area C1AED Rear Sensor Communication Malfunctio
Short in Selectable Force Limiter Squib RH Circuit (B1940-B1943)
DESCRIPTION The selectable force limiter circuit consists of the airbag ECU assembly and front seat outer belt assembly RH. This circuit instructs the SRS to deploy when deployment conditions are met. These DTCs are stored when a malfunction is detected in the selectable force limiter circuit. DT
