2019 / L200/TRITION/STRADA / EC - Workshop Manual
54 -CHASSIS ELECTRICAL > 54A-CHASSIS ELECTRICAL > FRONT TURN-SIGNAL LAMP > SYMPTOM PROCEDURES > THE RIGHT OR LEFT TURN-SIGNAL LAMP DOES NOT ILLUMINATE.
Inspection Procedure 2: One of the turn-signal lamps does not illuminate.
caution | Whenever the ECU is replaced, ensure that the input and output signal circuits are normal. |
COMMENTS ON TROUBLE SYMPTOM
If one of the turn-signal lamps does not illuminate, the wiring harness connector(s) or the bulb may be defective.
PROBABLE CAUSES
- Defective turn-signal lamp bulb
- Malfunction of side turn-signal lamp assembly <Fender panel type>
- Malfunction of side turn-signal lamp assembly <Door mirror type>
- Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
STEP 1. Confirm which turn-signal lamp is defective.
Which turn-signal lamp fails to illuminate correctly?
Only the front or rear turn-signal lamps does not illuminate normally : Refer to ETACS diagnosis code chart.
Only the side turn-signal lamps does not illuminate normally : Go to Step 2.
STEP 2. Resistance measurement at the side turn-signal lamp connector
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the resistance between the defective lamp connector terminal and body earth.- Measure the resistance between the side turn-signal lamp (LH) connector (earth terminal) and the body earth <Fender panel type>.
- Measure the resistance between the side turn-signal lamp (RH) connector (earth terminal) and the body earth <Fender panel type>.
- Measure the resistance between the door mirror assembly (LH) connector (earth terminal) and the body earth <Door mirror type>.
- Measure the resistance between the door mirror assembly (RH) connector (earth terminal) and the body earth <Door mirror type>.
OK: Continuity exists (2 Ω or less)
Is the check result normal?
Go to Step 4. Go to Step 3.
STEP 3. Check of open circuit in earth line between side turn-signal lamp connector <Fender mirror type>, door mirror assembly <Door mirror type> and body earth
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction). Repair the connector(s) or wiring harness.
STEP 4. Check of open circuit in TURN LH or TURN RH line between side turn-signal lamp connector <Fender mirror type>, door mirror assembly connector <Door mirror type> and ETACS-ECU connector
Is the check result normal?
Go to Step 5. Repair the connector(s) or wiring harness.
STEP 5. Retest the system.
Check that the side turn-signal lamp flashes normally when the turn-signal switch is operated.Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction). Replace the side turn-signal lamp assembly <Fender panel type> or side turn-signal lamp assembly (Refer to GROUP 51 - Door Mirror) <Door mirror type>.