Diagnosis Item
29: Diagnose when the M.U.T.-III cannot receive the data sent by electric tailgate control unit <vehicles
with electric tailgate>.
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 electric tailgate control unit" when the M.U.T.-III checks the periodically sent data from
each ECU and cannot receive the electric tailgate control unit data only.
TROUBLE JUDGEMENT CONDITIONS
M.U.T.-III judges the trouble when the periodically sent data from electric tailgate control
unit cannot be received.
PROBABLE CAUSES
Damaged harness wires and connectors
Power supply circuit malfunction of the electric tailgate control unit
Malfunction of the electric tailgate control unit
DIAGNOSIS PROCEDURE
STEP 1. Connector check: joint connector (CAN5) and electric
tailgate control unit 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 joint connector (CAN5) and electric
tailgate control unit 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 (CAN5) and the electric tailgate control unit 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 joint connector (CAN5) terminal No.8 and electric tailgate control
unit connector terminal No.7 OK: Continuity (2 Ω or less)
(5)Continuity between joint connector (CAN5) terminal No.19 and electric tailgate
control unit connector terminal No.8 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 electric tailgate control unit may be suspected. Diagnose the electric tailgate. Refer
to GROUP 42A - Troubleshooting .
NO : <Either or all of the resistances measure more than 2 Ω> Check
the intermediate connector, and repair if necessary. If the intermediate connector is in good condition,
repair the wiring harness between joint connector (CAN5) and the electric tailgate control unit connector.