Code No.B16A3 Turn-signal Lamp (LH) Short Circuit
DIAGNOSTIC FUNCTION
When the left wiring harness of turn-signal lamp is short circuited, the ETACS-ECU sets diagnosis code No. B16A3.
JUDGMENT CRITERIA
With the diagnosis code not set, when the short circuit is detected three times consecutively, the ETACS-ECU sets the diagnosis code No. B16A3.
PROBABLE CAUSES
- Damaged harness wires and connectors
- Malfunction of the ETACS-ECU
DIAGNOSIS PROCEDURE
STEP 1. Connector check: A-37 headlamp assembly (LH) connector, A-11 side turn-signal lamp (LH) connector and D-15 rear combination lamp (LH) connector
Q.
Is the check result normal?
Go to Step 2.
NO : Repair the defective connector.
STEP 2. Resistance measurement at the A-37 headlamp assembly (LH) connector, A-11 side turn-signal lamp (LH) connector and D-15 rear combination lamp (LH) connector
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Measure the resistance between the connector terminal of lamp which does not illuminate and the body earth.
- Measure the resistance between the A-37 headlamp assembly (LH) connector terminal No. 8 and the body earth.
- Measure the resistance between the A-11 side turn-signal lamp (LH) connector terminal No. 1 and the body earth.
- Measure the resistance between the D-15 rear combination lamp (LH) connector terminal No. 4 and the body earth.
OK: Continuity exists (2 Ω
or less)
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Q.
Is the check result normal?
Go to Step 4.
Go to Step 3.
STEP 3. Wiring harness check between A-37 headlamp assembly (LH) connector terminal No. 8, A-11 side turn-signal lamp (LH) connector terminal No. 1, D-15 rear combination lamp (LH) connector terminal No. 4 and the body earth
- Check the earth wires for open circuit.
Q.
Is the check result normal?
Go to Step 6.
Repair the wiring harness.
STEP 4. Connector check: C-304 and C-311 ETACS-ECU connectors
Q.
Is the check result normal?
Go to Step 5.
Repair the defective connector.
STEP 5. Wiring harnesses check between A-37 headlamp assembly (LH) connector terminal No. 5, A-11 side turn-signal lamp (LH) connector terminal No. 2, D-15 rear combination lamp (LH) connector terminal No. 3 and C-304 ETACS-ECU connector terminal No. 9 or C-311 ETACS-ECU connector terminal No. 18
- Check the output lines for open circuit.
Q.
Is the check result normal?
Go to Step 6.
Repair the wiring harness.
STEP 6. Check whether the diagnosis code is reset.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
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(3)Check if diagnosis code is set.
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Q.
Is the diagnosis code set?
Replace the ETACS-ECU.
The diagnosis is complete.
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