C Logical address CD player

DTC

Diagnosis item

Description

Action to be taken

42

No Disc Readout

Disc cannot be read.

• Replace radio receiver assy.

44

CD player Error

Error is detected in CD player.

Replace radio receiver assy.

45

EJECT Error

Magazine cannot be ejected.

Replace radio receiver assy.

46

Scratched/Reversed Disc

Scratches or dirt is found on CD surface or CD is set upside down.

Inspect CD.

ELECTRONIC CIRCUIT INSPECTION PROCEDURE

1. BASIC INSPECTION

(a) RESISTANCE MEASURING CONDITION OF ELECTRONIC PARTS

(1) Unless stated, all resistance is measured at an ambient temperature of 20oC (68°F). As the resistance may be outside the specifications if measured at high temperatures immediately after the vehicle has been running, measurements should be made when the engine has cooled down.

Corolla E11 Changer

(b) HANDLING OF CONNECTOR

(1) When removing the connector with lock, press the connector in the direction of the engagement and remove the lock by lightly pressing the lock claw.

(2) When removing the connector, do not hold the harness, but hold the connector.

(3) Before connecting the connector, check that there is no deformation, damage or missing terminals.

(4) The connector with a lock should be securely connected until it makes a "click" sound.

(5) When checking the connector with a Toyota electrical tester, check it from the backside (harness side) of the connector using a mini test lead.

NOTICE:

• As a water proof connector cannot be checked from the backside, check by connecting the sub-harness.

• Do not damage the terminals by moving the inserted tester needle.

(c) CONNECTOR CHECKING POINTS

(1) Checking when the connector is connected:

By holding the connector, check the inserted condition and locking efficiency (engaged condition).

(2) Checking when the connector is removed:

Check by lightly pulling the wire harness (missing terminal, terminal crimping condition, core wire break).

Check visually for any rust, metal particles, water and bent terminals (rust, mixing of foreign object, terminal deformation).

NOTICE:

When testing a gold-plated female terminal, always use a gold-plated male terminal.

Toyota Corolla E11 Manual Radio

(3) Checking of the contact pressure of the terminal: Prepare a spare male terminal. Insert it into a female terminal, check the engaged condition and sliding resistance.

Toyota Point Ground

(d) REPAIR METHOD OF CONNECTOR TERMINAL

(1) If there is on the contact point, clean the contact point using an air gun or shop rag. However, never polish the contact point using sand paper as the platings may come off.

(2) In case of abnormal contact pressure, replace the female terminal. However, if a male terminal is gold-plated (gold color), use gold-plated female terminal and if it is silver-plated (silver color), use silver-plated female terminal.

Z17004

(e) HANDLING OF WIRE HARNESS

(1) When removing the wire harness, check the positioning of the wiring and clamping before starting work in order to be able to restore it correctly.

(2) Never twist, pull or loosen the wire harness more than necessary.

(3) Never allow the wire harness to come into contact with a high-temperature, rotating, moving, vibrating or sharp (edge of the panel, tip of the screw, etc.) part.

(4) When installing parts, never let the wire harness be interfered with.

(5) Never cut or break the cover of the wire harness. If one is cut or broken, replace it or securely repair it with electrical tape.

2. CHECK OPEN CIRCUIT

(a) For the open circuit in the wire harness in Fig. 1, perform a resistance check in step (b) or a voltage check in step

(c) to locate the section.

(b) Check the resistance.

(1) Disconnect connectors A and C and measure the resistance between them.

Resistance: 1 Q or less

HINT:

Measure the resistance while lightly shaking the wire harness vertically and horizontally.

Between terminal 1 of connector A and terminal 1 of connector C ^ 10 KQ or higher Between terminal 2 of connector A and terminal 2 of connector C ^ Below 1 Q Therefore, the cause is an open circuit between terminal 1 of connector A and terminal 1 of connector C.

(2) Disconnect connector B and measure the resistance between the connectors.

Between terminal 1 of connector A and terminal 1 of connector B1 ^ Below 1 Q Between terminal 1 of connector B2 and terminal 1 of connector C ^ 10 KQ

Therefore, the cause is an open circuit between terminal 1 of connector B2 and terminal 1 of connector C.

(c) Check the voltage.

(1) In a circuit in which voltage is applied (to the ECU connector terminal), an open circuit can be checked by conducting a voltage check.

As shown in Fig. 4, with each connector still connected, measure the voltage between the body ground and terminal 1 of connector A at the ECU 5 V output terminal, terminal 1 of connector B, and terminal 1 of connector C, in that order.

5 V: Between terminal 1 of connector A and body ground

5 V: Between terminal 1 of connector B and body ground

0 V: Between terminal 1 of connector C and body ground

Therefore, the cause is an open circuit in the wire harness between terminal 1 of connector B and terminal 1 of connector C.

SHORT

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