Toyota Yaris: Meter / Gauge System / Turn Signal/Hazard Flasher Circuit Current Above Threshold (B150819)

Toyota Yaris XP210 (2020-2025) Reapir and Service Manual / Vehicle Interior / Meter / Gauge / Display / Meter / Gauge System / Turn Signal/Hazard Flasher Circuit Current Above Threshold (B150819)

DESCRIPTION

This DTC is stored when the combination meter assembly detects a short in a turn signal light circuit.

HINT:

If there is a short in a turn signal light circuit, all of the turn signal lights in that circuit will not blink.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B150819

Turn Signal/Hazard Flasher Circuit Current Above Threshold

Diagnosis Condition:

  • Auxiliary battery voltage is 10 V or more

Malfunction Status:

  • Short in turn signal light circuit
  • Headlight assembly
    • Headlight unit assembly LH
    • Headlight unit assembly RH
    • Wire Harness LH
    • Wire Harness RH
  • Outer rear view mirror assembly
    • Side turn signal light assembly LH
    • Side turn signal light assembly RH
  • Rear combination light assembly
    • Rear turn signal light LED
  • Harness or connector
  • Combination meter assembly

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
  • Inspect the turn signal light bulbs before performing the following procedure.

PROCEDURE

1.

CHECK SYMPTOMS

(a) Check the problem symptoms.

Result

Proceed to

All LH side turn signal lights do not blink

A

All RH side turn signal lights do not blink

B
B

GO TO STEP 8

A

2.

CHECK LH SIDE TURN SIGNAL LIGHTS (FRONT TURN SIGNAL LIGHT CIRCUIT)

Pre-procedure1

(a) Disconnect the A4 headlight assembly LH connector.

Procedure1

(b) Operate the turn signal switch and check that the LH side turn signal lights other than the front turn signal light blink.

HINT:

If the LH side turn signal lights other than the front turn signal light blink, the headlight assembly LH is malfunctioning.

Post-procedure1

(c) None

Result

Proceed to

LH side turn signal lights other than the front turn signal light blink

A

All LH side turn signal lights do not blink

B
B

GO TO STEP 4

A

3.

CHECK LH SIDE TURN SIGNAL LIGHTS (WIRE HARNESS)

(a) Remove the headlight unit assembly LH from headlight assembly LH.

HINT:

Click here

(b) Connect the headlight assembly LH connector.

(c) Operate the turn signal switch and check that the LH side turn signal lights other than the front turn signal light blink.

HINT:

If all LH side turn signal lights do not blink, the wire harness LH is malfunctioning.

Result

Proceed to

LH side turn signal lights other than the front turn signal light blink

A

All LH side turn signal lights do not blink

B
A

REPLACE HEADLIGHT UNIT ASSEMBLY LH

B

REPLACE WIRE HARNESS LH

4.

CHECK LH SIDE TURN SIGNAL LIGHTS (SIDE TURN SIGNAL LIGHT CIRCUIT)

Pre-procedure1

(a) Connect the headlight assembly LH connector.

(b) Disconnect the L14 outer rear view mirror assembly LH connector.

Procedure1

(c) Operate the turn signal switch and check that the LH side turn signal lights other than the side turn signal light blink.

HINT:

If the LH side turn signal lights other than the side turn signal light blink, a component of the outer rear view mirror assembly LH is malfunctioning.

Post-procedure1

(d) None

Result

Proceed to

LH side turn signal lights other than the side turn signal light blink

A

All LH side turn signal lights do not blink

B
B

GO TO STEP 6

A

5.

CHECK LH SIDE TURN SIGNAL LIGHTS (OUTER REAR VIEW MIRROR ASSEMBLY LH)

Pre-procedure1

(a) Remove the side turn signal light assembly LH from outer rear view mirror assembly LH.

Click here

(b) Connect the outer rear view mirror assembly LH connector.

Procedure1

(c) Operate the turn signal switch and check that the LH side turn signal lights other than the side turn signal light blink.

HINT:

If all LH side turn signal lights do not blink, the outer rear view mirror assembly LH is malfunctioning.

Post-procedure1

(d) None

Result

Proceed to

LH side turn signal lights other than the side turn signal light blink

A

All LH side turn signal lights do not blink

B
A

REPLACE SIDE TURN SIGNAL LIGHT ASSEMBLY LH

B

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH

6.

CHECK LH SIDE TURN SIGNAL LIGHTS (REAR TURN SIGNAL LIGHT CIRCUIT)

Pre-procedure1

(a) Connect the outer rear view mirror assembly LH connector.

(b) Disconnect the O105 rear combination light assembly LH connector.

Procedure1

(c) Operate the turn signal switch and check that the LH side turn signal lights other than the rear turn signal light blink.

HINT:

If the LH side turn signal lights other than the rear turn signal light blink, the rear combination light assembly LH is malfunctioning.

Post-procedure1

(d) None

Result

Proceed to

LH side turn signal lights other than the rear turn signal light blink

A

All LH side turn signal lights do not blink

B
A

REPLACE REAR TURN SIGNAL LIGHT LED

B

7.

CHECK HARNESS AND CONNECTOR (LH SIDE EACH PARTS - COMBINATION METER ASSEMBLY)

Pre-procedure1

(a) Disconnect the A4 headlight assembly LH connector.

(b) Disconnect the L14 outer rear view mirror assembly LH connector.

(c) Disconnect the H7 combination meter assembly connector.

Procedure1

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A4-6 (B) - Body ground

Always

10 kΩ or higher

L14-1 (B) - Body ground

Always

10 kΩ or higher

O105-2 (B) - Body ground

Always

10 kΩ or higher

H7-1 (LL) - Body ground

Always

10 kΩ or higher

H7-5 (TRNL) - Body ground

Always

10 kΩ or higher

Post-procedure1

(e) None

OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.

CHECK RH SIDE TURN SIGNAL LIGHTS (FRONT TURN SIGNAL LIGHT CIRCUIT)

Pre-procedure1

(a) Disconnect the A5 headlight assembly RH connector.

Procedure1

(b) Operate the turn signal switch and check that the RH side turn signal lights other than the front turn signal light blink.

HINT:

If the RH side turn signal lights other than the front turn signal light blink, the headlight assembly RH is malfunctioning.

Post-procedure1

(c) None

Result

Proceed to

LH side turn signal lights other than the front turn signal light blink

A

All LH side turn signal lights do not blink

B
B

GO TO STEP 10

A

9.

CHECK RH SIDE TURN SIGNAL LIGHTS (WIRE HARNESS)

(a) Remove the headlight unit assembly RH from headlight assembly RH.

HINT:

Click here

(b) Connect the A5 headlight assembly RH connector.

(c) Operate the turn signal switch and check that the LH side turn signal lights other than the front turn signal light blink.

HINT:

If all LH side turn signal lights do not blink, the wire harness RH is malfunctioning.

Result

Proceed to

LH side turn signal lights other than the front turn signal light blink

A

All LH side turn signal lights do not blink

B
A

REPLACE HEADLIGHT UNIT ASSEMBLY RH

B

REPLACE WIRE HARNESS RH

10.

CHECK RH SIDE TURN SIGNAL LIGHTS (SIDE TURN SIGNAL LIGHT CIRCUIT)

Pre-procedure1

(a) Connect the headlight assembly RH connector.

(b) Disconnect the K14 outer rear view mirror assembly RH connector.

Procedure1

(c) Operate the turn signal switch and check that the RH side turn signal lights other than the side turn signal light blink.

HINT:

If the RH side turn signal lights other than the side turn signal light blink, a component of the outer rear view mirror assembly RH is malfunctioning.

Post-procedure1

(d) None

Result

Proceed to

RH side turn signal lights other than the side turn signal light blink

A

All RH side turn signal lights do not blink

B
B

GO TO STEP 12

A

11.

CHECK RH SIDE TURN SIGNAL LIGHTS (OUTER REAR VIEW MIRROR ASSEMBLY RH)

Pre-procedure1

(a) Remove the side turn signal light assembly RH from outer rear view mirror assembly RH.

Click here

(b) Connect the K14 outer rear view mirror assembly RH connector.

Procedure1

(c) Operate the turn signal switch and check that the RH side turn signal lights other than the side turn signal light blink.

HINT:

If all RH side turn signal lights do not blink, the outer rear view mirror assembly RH is malfunctioning.

Post-procedure1

(d) None

Result

Proceed to

RH side turn signal lights other than the side turn signal light blink

A

All RH side turn signal lights do not blink

B
A

REPLACE SIDE TURN SIGNAL LIGHT ASSEMBLY RH

B

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH

12.

CHECK RH SIDE TURN SIGNAL LIGHTS (REAR TURN SIGNAL LIGHT CIRCUIT)

Pre-procedure1

(a) Connect the outer rear view mirror assembly RH connector.

(b) Disconnect the O106 rear combination light assembly RH connector.

Procedure1

(c) Operate the turn signal switch and check that the RH side turn signal lights other than the rear turn signal light blink.

HINT:

If the RH side turn signal lights other than the rear turn signal light blink, the rear combination light cord RH is malfunctioning.

Post-procedure1

(d) None

Result

Proceed to

RH side turn signal lights other than the rear turn signal light blink

A

All RH side turn signal lights do not blink

B
A

REPLACE REAR TURN SIGNAL LIGHT LED

B

13.

CHECK HARNESS AND CONNECTOR (RH SIDE EACH PARTS - COMBINATION METER ASSEMBLY)

Pre-procedure1

(a) Disconnect the A5 headlight assembly RH connector.

(b) Disconnect the K14 outer rear view mirror assembly RH connector.

(c) Disconnect the H7 combination meter assembly connector.

Procedure1

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A5-6 (B) - Body ground

Always

10 kΩ or higher

K14-1 (B) - Body ground

Always

10 kΩ or higher

O106-2 (B) - Body ground

Always

10 kΩ or higher

H7-2 (LR) - Body ground

Always

10 kΩ or higher

H7-6 (TRNR) - Body ground

Always

10 kΩ or higher

Post-procedure1

(e) None

OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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