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Malfunction in Speedometer

The document outlines the diagnostic procedures for malfunctioning speedometers in vehicles, specifically focusing on the combination meter and vehicle speed sensor. It includes wiring diagrams and inspection steps to check the combination meter assembly, OBD II scan tool outputs, and the speedometer sensor. The document provides voltage standards and troubleshooting steps to determine whether to repair or replace components.

Uploaded by

Bladimir Pairo Ajahuana
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© © All Rights Reserved
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28 views3 pages

Malfunction in Speedometer

The document outlines the diagnostic procedures for malfunctioning speedometers in vehicles, specifically focusing on the combination meter and vehicle speed sensor. It includes wiring diagrams and inspection steps to check the combination meter assembly, OBD II scan tool outputs, and the speedometer sensor. The document provides voltage standards and troubleshooting steps to determine whether to repair or replace components.

Uploaded by

Bladimir Pairo Ajahuana
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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05–650

DIAGNOSTICS – COMBINATION METER 057KG–04

MALFUNCTION IN SPEEDOMETER

WIRING DIAGRAM

Vehicle Speed Sensor Combination Meter

3 4 9
(*1) (*1)
SP1 V1 II2 C9 SP IN
W–G W–G W–G

Skid Control ECU


with Actuator

17 14
(*2) (*2)
SP1 S1 IA6
W–G W–G
*1: w/o ABS
*2: w/ ABS
I32764

INSPECTION PROCEDURE
1 CHECK COMBINATION METER ASSY

(a) Remove the combination meter assy with connector still


connected.
(b) Check voltage.
(1) Jack up either of the front wheels.
(2) Shift the shift lever to neutral.
(3) Turn the ignition switch to ON.
SP IN (4) Measure the voltage between terminals C9–9 of
combination meter assy and body ground when
I30040 front wheel is turning slowly.
Standard voltage:
Voltage is generated intermittently.

10 – 14V

0
Turn the wheel

2004 COROLLA (RM1037U)

Author: Date: 815


05–651
DIAGNOSTICS – COMBINATION METER

Result:
A B C
OK NG (w/ ABS) NG (w/o ABS)

B Go to step 2

C Go to step 3

CHECK AND REPLACE COMBINATION METER ASSY

2 CHECK OBD II SCAN TOOL OR HAND–HELD TESTER

(a) Check output value of skid control ECU.


(1) Connect the hand–held tester to DLC3.
(2) Turn the ignition switch to ON and push the hand–held tester main switch ON.
(3) Select the DATA LIST mode on the hand–held tester.
(4) Check that there is no difference between the speed value output from the speed sensor dis-
played by the hand–held tester and the speed value displayed by the speedometer when driving
the vehicle.
OK: There is almost no difference from the displayed speed value.
NG GO TO BRAKE SYSTEM

OK

REPAIR OR REPLACE HARNESS OR CONNECTOR

2004 COROLLA (RM1037U)

Author: Date: 816


05–652
DIAGNOSTICS – COMBINATION METER

3 INSPECT SPEEDOMETER SENSOR

(a) Check voltage.


(1) Shift the shift lever to neutral.
(2) Jack up either of the front wheel.
(3) Turn the ignition switch to ON.
(4) Measure voltage between terminals 3 and 2 of
speed sensor when the front wheel is turning slowly.
Standard voltage:
Voltage is generated intermittently.
I31248

10 – 14V

0
Turn the wheel

NG CHECK AND REPLACE SPEEDOMETER


SENSOR

OK

REPAIR OR REPLACE HARNESS OR CONNECTOR

2004 COROLLA (RM1037U)

Author: Date: 817

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