Lexus ES300 (1997 year). Manual — part 171
N21499
Instrument Panel
Junction Block
Integration Relay
GAUGE Fuse
Ignition Switch and
Key Unlock Warning Switch
BE04U–01
–
BODY ELECTRICAL
IGNITION SWITCH AND KEY UNLOCK WARNING
SWITCH
BE–19
1403
1997 LEXUS ES300 (RM511U)
IGNITION SWITCH AND KEY UNLOCK WARNING SWITCH
LOCATION
BE04V–01
N14824
4
8 7
3 2 1
6 5
LOCK
ACC
ON
START
N21360
4 3 2 1
5
6
7
8
From Back Side
LOCK
ACC
ON
START
BE–20
–
BODY ELECTRICAL
IGNITION SWITCH AND KEY UNLOCK WARNING
SWITCH
1404
1997 LEXUS ES300 (RM511U)
INSPECTION
1.
INSPECT IGNITION SWITCH CONTINUITY
Switch position
Tester connection
Specified condition
LOCK
–
No continuity
ACC
2 – 3
Continuity
ON
2 – 3 – 4
6 – 7
Continuity
START
1 – 2 – 4
6 – 7 – 8
Continuity
If continuity is not as specified, replace the switch.
2.
INSPECT IGNITION SWITCH CIRCUIT
Connect the switch connector and inspect the connector on the
wire harness side from the back side.
Tester connection
Condition
Specified condition
1– Ground
Ignition switch START
Battery positive voltage
2 – Ground
Constant
Battery positive voltage
3 – Ground
Ignition switch ACC or ON
Battery positive voltage
4 – Ground
Ignition switch ON
Battery positive voltage
6 – Ground
Ignition switch ON
Battery positive voltage
7 – Ground
Constant
Battery positive voltage
8– Ground
Ignition switch START
Battery positive voltage
If circuit is not as specified, inspect the switch and circuits con-
nected to other parts.
N20125
OFF
ON
1
2
N21361
From Back Side
1
2
N20129
10
5
1
6
N20130
10 6 5 1
–
BODY ELECTRICAL
IGNITION SWITCH AND KEY UNLOCK WARNING
SWITCH
BE–21
1405
1997 LEXUS ES300 (RM511U)
3.
INSPECT KEY UNLOCK WARNING SWITCH CONTI-
NUITY
Switch position
Tester connection
Specified condition
OFF (Key removed)
–
No continuity
ON (Key set)
1 – 2
Continuity
If continuity is not as specified, replace the switch.
4.
INSPECT KEY UNLOCK WARNING SWITCH CIRCUIT
Connect the switch connector and inspect the connector on the
wire harness side from the back side.
Tester connection
Condition
Specified condition
2– Ground
Ignition key removed
No continuity
2– Ground
Ignition key set
Continuity
1– Ground
Constant
Continuity
If circuit is not as specified, inspect the switch and circuits con-
nected to other parts.
5.
Key Unlock Warning System:
INSPECT INTEGRATION RELAY OPERATION
(a)
Connect the positive (+) lead from the battery to terminal
1.
(b)
Connect the negative (–) lead from the battery to termi-
nals 5, 6 and 10.
(c)
Check the buzzer sounds.
(d)
Disconnect the negative (–) lead from the battery to termi-
nal 6.
(e)
Check that the buzzer stops sounding.
N20131
10 6 5 1
N20135
Junction Block Side
1211
1
2
3
10
9 8 7 6 5 4
BE–22
–
BODY ELECTRICAL
IGNITION SWITCH AND KEY UNLOCK WARNING
SWITCH
1406
1997 LEXUS ES300 (RM511U)
(f)
Connect the negative (–) lead from the battery to terminal
6.
(g)
Disconnect the negative (–) lead from the battery to termi-
nal 5.
(h)
Check that the buzzer stops sounding.
If operation is not as specified, replace the relay.
6.
INSPECT INTEGRATION RELAY CIRCUIT
(a)
Remove the relay from the junction block No.1 and in-
spect the connector on the junction block side.
Tester connection
Condition
Specified condition
2 – Ground
All door courtesy switches OFF (Door closed)
No continuity
2 – Ground
One of the door courtesy switches ON (Door
opened)
Continuity
4 – Ground
Door courtesy switches except that of the driver’s
door OFF (Door closed)
No continuity
4 – Ground
One of the door courtesy switches except that of
the driver’s door ON (Door opened)
Continuity
3 – Ground
Door outside handle switch OFF
No continuity
3 – Ground
Door outside handle switch ON
Continuity
5 – Ground
Key unlock warning switch OFF
No continuity
5 – Ground
Key unlock warning switch ON
Continuity
6 – Ground
Driver’s door courtesy switch OFF (Door closed)
No continuity
6 – Ground
Driver’s door courtesy switch ON (Door opened)
Continuity
8 – Ground
Buckle switch OFF (Seat belt unfastened)
No continuity
8 – Ground
Buckle switch ON (Seat belt fastened)
Continuity
10 – Ground
Constant
Continuity
1 – Ground
Constant
Battery positive voltage
7 – Ground
9 – Ground
Ignition switch LOCK or ACC
No voltage
7 – Ground
9 – Ground
Ignition switch ON
Battery positive voltage
11 – Ground
Ignition switch LOCK
No voltage
11 – Ground
Ignition switch ACC or ON
Battery positive voltage
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