Inspection Procedure

CHECK OPERATION OF SPEEDOMETER

(a) Drive the vehicle and check if the function of the speedometer on the combination meter is normal. OK:

Actual vehicle speed and the speed indicated on the speedometer are the same.

HINT:

The vehicle speed sensor is functioning normally when the indication on the speedometer is normal.

GO TO COMBINATION METER SYSTEM

INSPECT RADIO AND NAVIGATION ASSEMBLY

Radio and Navigation Assembly Wire Harness View:

Radio and Navigation Assembly Wire Harness View:

Disconnect the radio and navigation assembly connector F13.

Measure the voltage.

Jack up either one of the drive wheels. Move the shift lever to the neutral position. Turn the ignition switch on (IG).

Measure the voltage between terminal SPD of the wire harness connector and body ground when the drive wheels are turned slowly. OK:

Voltage pulses as shown in the illustration.

REPLACE RADIO AND NAVIGATION ASSEMBLY

CHECK HARNESS AND CONNECTOR (COMBINATION METER - RADIO AND NAVIGATION ASSEMBLY)

Radio and Navigation Assembly Wire Harness View:

Corolla E11 Spd
Combination Meter Wire Harness View:
E129818E01

(a) Disconnect the radio and navigation assembly connector F13 and combination meter connector F2.

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

Standard resistance

Tester connection

Condition

Specified condition

SPD-+S

Ignition switch off

Below 1 Q

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK HARNESS AND CONNECTOR (RADIO AND NAVIGATION ASSEMBLY - BODY GROUND)

Radio and Navigation Assembly Wire Harness View:

Radio and Navigation Assembly Wire Harness View:

E11 Corolla Radio Wiring Diagram

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

Tester connection

Condition

Specified condition

SPD - Body ground

Ignition switch off

If the resistance between terminal SPD and body ground is less than 10 kQ, there may be a short in a wire harness, connector, or an ECU.

REPAIR OR REPLACE HARNESS OR CONNECTOR OR CHECK EACH ECU

REPLACE COMBINATION METER

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