Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM1000000010Z5A |
Model Year Start: 2017 |
Model: Sienna |
Prod Date Range: [08/2016 -
] |
Title: SEAT: REAR POWER SEAT CONTROL SYSTEM: Park / Neutral Position Switch Circuit; 2017 - 2020 MY Sienna [08/2016 - ] |
Park / Neutral Position Switch Circuit
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DESCRIPTION
The fold seat control ECU receives signals from the park/neutral position switch assembly and controls the seat stowing and return operations. If the shift lever is in any position other than P when the engine switch is on (ACC) or on (IG), the seat cannot be operated.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuse for circuits related to this system before performing the following inspection procedure.
PROCEDURE
1.
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CHECK FOLD SEAT CONTROL ECU (PARK/NEUTRAL POSITION SWITCH SIGNAL)
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(a) Remove the fold seat control ECU with its connectors still connected (See page
).
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*a
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Component with harness connected
(Fold Seat Control ECU)
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*b
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LH Side
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*c
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RH Side
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(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
LH Side
Tester Connection
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Switch Condition
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Specified Condition
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b2-32 (P) - Body ground
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Engine switch on (ACC) or on (IG)
Shift lever in P
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11 to 14 V
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Engine switch on (ACC) or on (IG)
Shift lever not in P
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Below 1 V
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RH Side
Tester Connection
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Switch Condition
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Specified Condition
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a2-32 (P) - Body ground
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Engine switch on (ACC) or on (IG)
Shift lever in P
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11 to 14 V
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Engine switch on (ACC) or on (IG)
Shift lever not in P
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Below 1 V
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(c) Reinstall the fold seat control ECU.
NG
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2.
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CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - BATTERY)
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(a) Disconnect the B66 park/neutral position switch connector.
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*a
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Front view of wire harness connector
(to Park/Neutral Position Switch Assembly)
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(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
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Switch Condition
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Specified Condition
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B66-1 (RB) - Body ground
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Engine switch off
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Below 1 V
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Engine switch on (ACC) or on (IG)
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11 to 14 V
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(c) Reconnect the park/neutral position switch connector.
NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR
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OK
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3.
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INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY
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(a) Remove the park/neutral position switch assembly.
for 2WD: Click here
for 4WD: Click here
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*a
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Component without harness connected
(Park/Neutral Position Switch Assembly)
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(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
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Condition
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Specified Condition
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1 (RB) - 3 (PL)
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Shift lever in P
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Below 1 Ω
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Shift lever not in P
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10 kΩ or higher
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(c) Reinstall the park/neutral position switch assembly.
Result
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Proceed to
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OK
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A
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NG (for 2WD)
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B
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NG (for 4WD)
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C
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A
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4.
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CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - PARK/NEUTRAL POSITION SWITCH)
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(a) Disconnect the b2 or a2 fold seat control ECU connector.
(b) Disconnect the B66 park/neutral position switch assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
LH Side
Tester Connection
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Condition
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Specified Condition
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b2-32 (P) - B66-3 (PL)
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Always
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Below 1 Ω
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b2-32 (P) - Body ground
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Always
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10 kΩ or higher
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RH Side
Tester Connection
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Condition
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Specified Condition
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a2-32 (P) - B66-3 (PL)
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Always
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Below 1 Ω
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a2-32 (P) - Body ground
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Always
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10 kΩ or higher
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(d) Reconnect the park/neutral position switch assembly connector.
(e) Reconnect the fold seat control ECU connector.
NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR
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