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POWER MIRROR CONTROL
SYSTEM
Description
The Power Miror Control System carries out mirror left/right and up/down ad\
justments electrically when the Mir-
ror Switch is operated. In addition, operation of the Driving Position M\
emory and Return Switches makes it pos-
sible to store the adjusted position in memory and reproduce each adjustment \
when desired. The component
parts of this system and their functions are described in the following table\
.
Parts NameFunction
Outside Rear View
Mirror ECUThe Outside Rear View Mirror ECU is supplied with power from the DOME and RADIO
NO.2 fuses and is connected to the Tilt and Telescopic ECU, Mirror Switch, each
mirror motor and ground.
Rear View Adjustment
SwitchOperation of this switch sends left/right, up/down signals to Outside Re\
ar View Mirror
ECU.
Driving Position Memory
and Return SwitchesMemory and return signals are sent to the ECU via the Tilt and Telescopic ECU.
Mirror MotorThese motors operate on current from the Outside Rear View Mirror ECU, moving
the various parts of the mirror directly.
These sensors send signals about the motor positions to the ECU for stor\
ing in memory
and during return operation.
Left/Right Select SwitchThis switch is used to select operation of the Rear View Adjustment Switch for the
leftor right hand side mirror.
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Parts Location
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Wiring and Connector Diagrams (Cont'd)
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Parts Inspection
(Mirror Switch)
REMOVAL AND INSTALLATION OF
MIRROR SWITCH
(See Instrument Panel on page BO±33)
INSPECTION OF MIRROR SWITCH
INSPECT SWITCH CONTINUITY
Rear View adjustment switch
Left/Right Select
Switch Position
Terminal
Switch Position OFF
UP
DOWN LEFT
RIGHT LEFT SIDE RIGHT SIDE
Left/Right select switch
If continuity is not as specified, replace the switch.
(Mirror Motor)
REMOVAL AND INSTALLATION OF
OUTSIDE MIRROR ASSEMBLY
(See Outside Rear View Mirror on page BO±42)
INSPECTION OF MIRROR MOTOR
1. INSPECT MIRROR MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
1 and negative (±) lead to terminal 2 check that the
mirror turns to left side.
(b) Reverse the polarity, check that the mirror turns to right side.
(c) Connect the positive (+) lead from the battery to terminal
3 and negative (±) lead to terminal 2 check that the
mirror turns upward.
(d) Re ve rse th e po la rity, ch e ck th a t th e mirro r tu rn s
downward.
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BODY ELECTRICAL SYSTEM Power Mirror Control System
Terminal
Switch Position
OFF
LEFT
RIGHT
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2. INSPECT MIRROR POSITION SENSORSHINT: Strip off the vinyl tape of the connector and remove ter-
minals 1, 2, 3, 5 and 9 from the connector housing.
(a) Connect a series of three 1.5 volt dry cell batteries.
(b) Connect the positive (+) lead from the dry cell batteriesto terminal 5 and the negative (±) lead to terminal 9.
(c) Connect the positive (+) lead from the voltmeter to
terminal 6 and the negative (±) lead to terminal 9.
(d) Apply battery voltage to terminals 2 and 3, check that the voltage gradually changes according to the table
below while the mirror moves between the uppermost
position and lowermost position.
Mirror
positionLowermostUppermost
Voltage2.8 ± 5.0Changes
gradually0 ± 0.9
If voltage value is not as specified, replace the motor assem-
bly.
(e) Disconnect the four leads of the battery and voltmeter.
(f) Connect the positive (+) lead from the voltmeter to terminal 4 and the negative (±) lead to terminal 9.
(g) Apply battery voltage to terminals 1 and 2n inspect that the voltage gradually changes according to the table
below while the mirror moves between the leftmost
position and rightmost position.
Mirror
PositionLeftmostRightmost
Voltage
Left
Mirror2.8 ± 5.0Changes
gradually0 ± 0.9
VoltageRight
Mirror0 ± 0.9Changes
gradually2.8 ± 5.0
If voltage value is not as specified, replace the motor assem-
bly.
(Mirror ECU)
REMOVAL AND INSTALLATION OF
MIRROR ECU
REMOVAL AND INSTALL MIRROR ECU (a) Remove the No. 1 under cover .(See page BO±112)
(b) Re mo ve th e two scre ws an d disc onnect the two
connectors and then pull out the ECU.
(c) For installation, follow the removal procedure in reverse.
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INSPECTION OF MIRROR ECU
1. INSPECT MIRROR ECU CIRCUITDisconnect the connectors from the ECU and inspect the
connector on the wire harness side as shown in the chart be-
low.
Check forTester connectionConditionSpecified value
ContinuityA1±A2ConstantContinuity
A1±A3ConstantContinuity
A8±A10ConstantContinuity
A9±A10ConstantContinuity
A11±GroundConstantContinuity
A12±A13ConstantContinuity
A16±*ConstantContinuity
B1±B2Right mirror switch on DOWNContinuity
B1±B4Right mirror switch to RIGHTContinuity
B1±B5Left mirror switch to RIGHTContinuity
B1±B6Left mirror switch to DOWNContinuity
B2±B3Right mirror switch to UPContinuity
B3±B4Right mirror switch to LEFTContinuity
B3±B5Left mirror switch to LEFTContinuity
B3±B6Left mirror switch to UPContinuity
VoltageA4±GroundConstantBattery positive voltage
A7±GroundIgnition switch to ACCBattery positive voltageA7±GroundIgnition switch to OFFNo voltage
*: Terminal 1/18 of the Tilt and Telescopic ECU
If circuit is not as specified, inspect the wire harness and mir-
ror switch or motor assembly.
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2. INSPECT MIRROR ECU OPERATIONConnect the connectors and using a voltmeter with high im-
pedance (10 k /V minimum), measure the voltage at each
terminal and body ground.
Check forTester connectionConditionSpecified value
VoltageA1±GroundRight mirror switch to LEFTBattery positive voltage
A2±GroundRight mirror switch to UPBattery positive voltage
A3±GroundRight mirror switch to RIGHT or DOWNBattery positive voltage
*A5±GroundRight mirror to leftmost position0±0.9 V*A5±GroundRight mirror to rightmost position2.8±5.0 V
*A6±GroundRight mirror to lowermost position2.8±5.0 V*A6±GroundRight mirror to uppermost position0±0.9 V
A8±GroundLeft mirror switch to RIGHTBattery positive voltage
A9±GroundLeft mirror switch to UPBattery positive voltage
A10±GroundLeft mirror switch to LEFT or DOWNBattery positive voltage
A13±GroundRight or left mirror switch to any position except
OFFApprox. 5 V
*A14±GroundLeft mirror to leftmost position2.8±5.0 V*A14±GroundLeft mirror to rightmost position0±0.9 V
*A15±GroundLeft mirror to lowermost position2.8±5.0 V*A15±GroundLeft mirror to uppermost position0±0.9 V
B2±GroundConstantApprox. 5 V
B4±GroundConstantApprox. 5 V
B5±GroundConstantApprox. 5 V
B6±GroundConstantApprox. 5 V
*: Confirm that the voltage changes gradually while the mirror moves
If operation is not as specified, inspect the wire harness and
mirror switch or motor assembly. Then if these are correct, re-
place the ECU.
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Troubleshooting
You will find the cause of trouble more easily by properly using the table \
shown below. In this table, the
numbers indicate the order of priority of the causes of trouble. Check each part in \
the order shown. If neces-
sary, replace the part.
See pageBE±4 ,20BE±4,21BE±186BE±186 ±±BE±188SR±60 ±±IN±32BE±187
TroubleParts
name
RADIO NO. 2 FuseDOME FuseMirror SwitchMirror MotorWire HarnessMirror ECUDriving Position SwitchDriving Position Switch
(Position is not set)Tilt and Telescopic ECUMirror Sensors
Mirror does not operate.112354
Mirror operates abnormally1243
Mirror does not return to the memorized position.
(w/ Memory System)642135
Mirror returns to a position which is not memorized.
(w/ Memory System)312
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BODY ELECTRICAL SYSTEM Power Mirror Control System
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