MIRROR: POWER MIRROR CONTROL SYSTEM: INSPECTION; 2007 MY LX470 [08/2006

Last Modified: 7-3-2017	6.8:8.0.40	Doc ID: RM000001909004X
Model Year Start: 2007	Model: LX470	Prod Date Range: [08/2006 - ]
Title: MIRROR: POWER MIRROR CONTROL SYSTEM: INSPECTION; 2007 MY LX470 [08/2006 - ]

INSPECTION

1. INSPECT OUTER REAR VIEW MIRROR SWITCH ASSEMBLY

(a) The L side of the left/right adjustment switch:

Check the continuity of the mirror switch.

OK:

Tester Connection	Switch Condition	Specified Condition
3 - 4 1 - 7 7 - 8	UP	Continuity
3 - 4 1 - 7 7 - 8	OFF	No continuity
1 - 3 3 - 8 4 - 7	DOWN	Continuity
1 - 3 3 - 8 4 - 7	OFF	No continuity
4 - 9 1 - 7 7 - 8	LEFT	Continuity
4 - 9 1 - 7 7 - 8	OFF	No continuity
4 - 7 1 - 8 8 - 9	RIGHT	Continuity
4 - 7 1 - 8 8 - 9	OFF	No continuity

If the continuity is not as specified, replace the switch.

(b) The R side of the left/right adjustment switch:

Check the continuity of the mirror switch.

OK:

Tester Connection	Switch Condition	Specified Condition
2 - 4 1 - 7 7 - 8	UP	Continuity
2 - 4 1 - 7 7 - 8	OFF	No continuity
4 - 7 1 - 2 2 - 8	DOWN	Continuity
4 - 7 1 - 2 2 - 8	OFF	No continuity
4 - 10 1 - 7 7 - 8	LEFT	Continuity
4 - 10 1 - 7 7 - 8	OFF	No continuity
4 - 7 1 - 8 8 - 10	RIGHT	Continuity
4 - 7 1 - 8 8 - 10	OFF	No continuity

If the continuity is not as specified, replace the switch.

OK:

Tester Connection

Switch Condition

Specified Condition

1 - 5

2 - 4

RETURN

Continuity

1 - 2

4 - 5

RETRACT

Continuity

If the continuity is not as specified, replace the switch.

(d) Check the mirror switch circuit.

(1) Disconnect the connector from the switch and check the connector on the wire harness side.

OK:

Tester Connection	Condition	Specified Condition
8 - Ground	Always	Continuity
4 - Ground	Ignition switch OFF	No voltage
4 - Ground	Ignition switch ACC or ON	Battery positive voltage

If the circuit is not as specified, inspect the parts connected to the circuit.

(e) Check the indicator light operation.

(1) Connect the positive (+) lead from the battery to terminal 5 and the negative (-) lead to terminal 6, and check that the indicator light lights up.

If the indicator light does not light up, replace the switch.

2. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY

(a) Check the mirror motor operation.

(1) Connect the positive (+) lead from the battery to terminal 8 and the negative (-) lead to terminal 7, and check that the mirror surface turns outward.

(2) Reverse the polarity of the battery leads, and check that the mirror surface turns inward.

(3) Connect the battery positive (+) lead to terminal 6 and the battery negative (-) lead to terminal 7, and check that the mirror turns upward.

(4) Reverse the polarity of the battery leads, and check that the mirror turns downward.

If the operation is not as specified, replace the mirror assembly.

(b) w/ Driving position memory:

Check the mirror position sensor operation.

HINT:

Strip off the vinyl tape on the connector and remove terminals 6, 7, 9, 10, 15 and 16 from the connector housing.

(1) Connect 3 1.5 V dry cell batteries in series.

(2) Connect the positive (+) lead from the dry cell batteries to terminal 9 and its negative (-) lead to terminal 15.

(3) Connect the voltmeter positive (+) lead to terminal 16 and the voltmeter negative (-) lead to terminal 15.

(4) Apply battery positive voltage to terminal 7 and 6, and then check that the voltage gradually changes as shown in the table below while the mirror moves between the uppermost position and the lowermost position.

Standard voltage:

Mirror Position	Lowermost	Mirror Position	Uppermost
Voltage	2.8 to 5.0	Changes Gradually	0 to 1.8

If the voltage value is not as specified, replace the mirror assembly.

(5) Disconnect the 4 leads of the battery and voltmeter.

(6) Connect the voltmeter positive (+) lead to terminal 10 and the voltmeter negative (-) lead to terminal 15.

(7) Apply battery positive voltage to terminal 7 and 8, and then check that the voltage gradually changes as shown in the table below while the mirror moves between the leftmost position and rightmost position.

Standard voltage:

Mirror Position	Left-most	Mirror Position	Right-most
Voltage LEFT	2.8 to 5.0	Changes gradually	0 to 18
Voltage RIGHT	0 to 18	Changes gradually	2.8 to 5.0

If the voltage value is not as specified, replace the mirror assembly.

3. INSPECT DRIVING POSITION MEMORY AND RETURN SWITCH

(a) Check the continuity of the switch.

OK:

Tester Connection	Switch Position	Specified Condition
3 - 4	SET switch ON	Continuity
2 - 3	Return SW1 ON	Continuity
1 - 3	Return SW2 ON	Continuity

If the continuity is not as specified, replace the switch.

4. INSPECT MIRROR CONTROL ECU CIRCUIT

(a) Disconnect the connector from the ECU and inspect the connector on the wire harness side.

OK:

Tester Connection	Condition	Specified Condition
3 - 16	Right side mirror switch to RIGHT	Continuity
4 - 16	Left side mirror switch to RIGHT	Continuity
5 - 16	Right side mirror switch to DOWN	Continuity
6 - 16	Left side mirror switch to DOWN	Continuity
3 - 17	Right side mirror switch to LEFT	Continuity
4 - 17	Left side mirror switch to LEFT	Continuity
5 - 17	Right side mirror switch to UP	Continuity
6 - 17	Left side mirror switch to UP	Continuity
7 - 19	Constant	Continuity
14 - Ground	Constant	Continuity

If the circuit is not as specified, inspect the circuits connected to other parts.

(b) Disconnect the connector from the ECU and inspect the connector on the wire harness side.

OK:

Tester Connection	Condition	Specified Condition
1 - Ground	Constant	Battery positive voltage
2 - Ground	Ignition switch OFF	No voltage
2 - Ground	Ignition switch ACC or ON	Battery positive voltage

If the circuit is not as specified, inspect the circuits connected to other parts.

5. INSPECT MIRROR CONTROL ECU OPERATION

(a) Connect the connectors, and using a voltmeter with high impedance (10 kΩ/V minimum), measure the voltage at each terminal and body ground.

OK:

Tester Connection	Condition	Specified Condition
3 - Ground	Always	About 5 V
4 - Ground	Always	About 5 V
5 - Ground	Always	About 5 V
6 - Ground	Always	About 5 V
7 - Ground	Right or left side mirror switch to any position except OFF	About 5 V
* 8 - Ground	Left side mirror to lowermost position	2.8 to 5.0 V
* 8 - Ground	Left side mirror to uppermost position	0 to 0.9 V
* 9 - Ground	Left side mirror to leftmost position	2.8 to 5.0 V
* 9 - Ground	Left side mirror to rightmost position	0 to 0.9 V
10 - Ground	Left side mirror switch to LEFT or DOWN	Battery positive voltage
11 - Ground	Left side mirror switch to RIGHT	Battery positive voltage
12 - Ground	Left side mirror switch to UP	Battery positive voltage
* 20 - Ground	Right side mirror to lowermost position	2.8 to 5.0 V
* 20 - Ground	Right side mirror to uppermost position	0 to 0.9 V
* 21 - Ground	Right side mirror to leftmost position	2.8 to 5.0 V
* 21 - Ground	Right side mirror to rightmost position	0 to 0.9 V
22 - Ground	Right side mirror switch to RIGHT or DOWN	Battery positive voltage
23 - Ground	Right side mirror switch to LEFT	Battery positive voltage
24 - Ground	Right side mirror switch to UP	Battery positive voltage

*: Confirm that the voltage changes gradually while the mirror moves.

If the operation is not as specified, inspect the wire harness, the mirror switch or the mirror assembly. If these are correct, replace the ECU.