DESCRIPTION
The stereo component amplifier assembly receives a vehicle speed signal from the combination meter assembly to control the ASL function.
HINT:
WIRING DIAGRAM
1. for 1AR-FE
2. for 2GR-FE
PROCEDURE
1. |
INSPECT COMBINATION METER ASSEMBLY (OUTPUT WAVEFORM) |
(a) Check the output waveform. (1) Remove the combination meter assembly with the connector(s) still connected. (2) Connect an oscilloscope to terminal E1-16 (+S) and body ground. (3) Turn the ignition switch to ON. (4) Turn a wheel slowly. (5) Check the signal waveform according to the condition(s) in the table below.
OK: The waveform is similar to that shown in the illustration. HINT: When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows. Text in Illustration
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|
NG |
GO TO METER / GAUGE SYSTEM |
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2. |
INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY (INPUT WAVEFORM) |
(a) Check the input waveform. (1) Remove the stereo component amplifier assembly with the connector(s) still connected. (2) Connect an oscilloscope to terminal E14-11 (SPD) and body ground. (3) Turn the ignition switch to ON. (4) Turn a wheel slowly. (5) Check the signal waveform according to the condition(s) in the table below.
OK: The waveform is similar to that shown in the illustration. HINT: When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows. Text in Illustration
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|
OK |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
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3. |
CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - JUNCTION CONNECTOR) |
(a) Disconnect the E14 stereo component amplifier assembly connector.
(b) Disconnect the E31 junction connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
E14-11 (SPD) - E31-21 |
Always |
Below 1 Ω |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. |
CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - JUNCTION CONNECTOR) |
(a) Disconnect the E1 combination meter assembly connector.
(b) Disconnect the E31 junction connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
E1-16 (+S) - E31-19 |
Always |
Below 1 Ω |
OK |
REPLACE JUNCTION CONNECTOR |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Reassembly
REASSEMBLY
PROCEDURE
1. INSTALL SHIFT SOLENOID VALVE SL4
(a) Coat the shift solenoid valve SL4 and bolt with ATF.
Text in Illustration
*1
Lock Plate
*2
Solenoid V ...
System Diagram
SYSTEM DIAGRAM
Input and Output Signal of Each ECU
Transmitting ECU (transmitter)
Receiving ECU
Signal
Communication Method
Power management Control ECU
Steering Lock ECU (Steering Lock ...
Runnable Signal Malfunction (B2286,P0335)
DESCRIPTION
The power management control ECU receives an engine speed signal and information
that indicates whether the engine is running or not. It receives the engine speed
signal from the ECM via a direct line, and the information about whether the eng ...