54A-CODE NO. B16A9 TURN LIGHT(LH) DEACTIVATED

DTC B16A9 Turn light(LH) deactivated

caution

Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.

DIAGNOSTIC FUNCTION

DTC B16A9 will be set when the turn-signal light (LH) control circuit in the ETACS-ECU fails.

TROUBLE JUDGMENT

DTC B16A9 will be set when the ETACS-ECU detects a short to ground in its turn-signal light (LH) control circuit.

TROUBLESHOOTING HINTS

Turn -signal light circuit fails
The ETACS-ECU may be defective

DIAGNOSIS

Using scan tool MB991958, read the other DTC.

Check if DTC B16A2 is set in ETACS-ECU.

(1)

caution

To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

Connect scan tool. Refer to "How to connect Scan Tool (M.U.T.-III)

(2) Erase the DTC.

(3) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.

(4) Check if DTC is set.

Is the DTC set?

Carry out the troubleshooting for DTC B16A2. On completion, replace the ETACS-ECU when it has not been replaced as the troubleshooting process for DTC B16A2. This is because DTC B16A9 cannot be erased.

Replace the ETACS-ECU.