Diagnosis Item 9: Diagnose when the M.U.T.-III cannot receive the data sent by G and yaw rate sensor. <vehicles with ASTC>


caution When servicing a CAN bus line, earth yourself by touching a metal object such as an unpainted water pipe. If you fail to do, a component connected to the CAN bus line may be broken.


FUNCTION


The diagnostic result demonstrates that "the M.U.T.-III cannot receive the sent data from the G and yaw rate sensor" when the M.U.T.-III checks the periodically sent data from each ECU and cannot receive the G and yaw rate sensor data only.

TROUBLE JUDGEMENT CONDITIONS


M.U.T.-III judges the trouble when the periodically sent data from G and yaw rate sensor cannot be received and sent.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. Connector check: C-119 joint connector (CAN1) and C-144 G and yaw rate sensor connector


caution The strand end of the twist wire should be within 10 cm from the connector. For details refer to .

When checking the joint connector, ensure that its wiring harness side and its short pins are not damaged.

Q. Is the check result normal?

Go to Step 2.

Repair the defective connector. Replace the joint connector as necessary.

STEP 2. Resistance measurement at C-119 joint connector (CAN1) and C-144 G and yaw rate sensor connector.
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .


(1)Disconnect joint connector (CAN1) and the G and yaw rate sensor connector, and measure at the wiring harness side.
(2)Turn the ignition switch to the LOCK (OFF) position.
(3)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(4)Continuity between C-119 joint connector (CAN1) terminal No.4 and C-144 G and yaw rate sensor connector terminal No.2
OK: Continuity (2 Ω or less)

(5)Continuity between C-119 joint connector (CAN1) terminal No.15 and C-144 G and yaw rate sensor connector terminal No.3
OK: Continuity (2 Ω or less)
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<All the resistances measure 2 Ω or less> Power supply to the G and yaw rate sensor may be suspected. Diagnose the G and yaw rate sensor.

NO : <Either or all of the voltages measure more than 2 Ω> Repair the wiring harness between joint connector (CAN1) and the G and yaw rate sensor connector.