Lexus NX: Lost Communication with Airbag System Control Module (P3107-213)
DESCRIPTION
The hybrid vehicle control ECU detects a problem in the collision signal line from the airbag ECU assembly and alerts the driver.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| P3107-213 | Lost Communication with Airbag System Control Module | Short to ground in the communication circuit: Communication from the airbag ECU assembly stopped and Circuit Low has been detected for a certain period. (1 trip detection logic) |
| Does not come on | Master Warning Light: Comes on |
| DTC No. | Data List |
|---|---|
| P3107-213 | Collision Signal (Airbag) |
WIRING DIAGRAM
Refer to the wiring diagram for DTC P3107-214.
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CAUTION / NOTICE / HINT
HINT:
After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.
- Turn the power switch on (IG) and wait for 15 seconds or more.
PROCEDURE
| 1. | CHECK DTC OUTPUT (SRS AIRBAG) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Body Electrical / SRS Airbag / Trouble Codes.
(d) Check for DTCs.
Body Electrical > SRS Airbag > Trouble Codes(e) Turn the power switch off.
| Airbag system DTCs are output. | .gif) | GO TO DTC CHART (AIRBAG SYSTEM) |
|
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| 2. | CHECK AIRBAG ECU ASSEMBLY (CHECK WAVEFORM) |
(a) Connect an oscilloscope between the airbag ECU assembly terminals specified in the table below.
(b) Turn the power switch on (READY).
| (c) Measure the waveform.
|
|
(d) Turn the power switch off.
| The waveform differs from the one shown in the illustration. | | GO TO STEP 6 |
|
| 3. | CLEAR DTC |
Click here
|
| 4. | CHECK DTC OUTPUT (HYBRID CONTROL) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
(d) Check for DTCs.
Powertrain > Hybrid Control > Trouble Codes(e) Turn the power switch off.
| P3107-213 is output. | | REPLACE HYBRID VEHICLE CONTROL ECU |
|
| 5. | CHECK FOR INTERMITTENT PROBLEMS |
Click here
| OK | | REPLACE HYBRID VEHICLE CONTROL ECU |
| NG | | REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA |
| 6. | CHECK AIRBAG ECU ASSEMBLY |
(a) Disconnect the I58 airbag ECU assembly connector.
| (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(c) Reconnect the I58 airbag ECU assembly connector.
| NG | | REPLACE AIRBAG ECU ASSEMBLY |
|
| 7. | CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - AIRBAG ECU ASSEMBLY) |
(a) Disconnect the I116 hybrid vehicle control ECU connector.
(b) Disconnect the I58 airbag ECU assembly connector.
| (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(d) Reconnect the I58 airbag ECU assembly connector.
(e) Reconnect the I116 hybrid vehicle control ECU connector.
| OK | | REPLACE HYBRID VEHICLE CONTROL ECU |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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