Toyota Sequoia (2005). Manual — part 145
A19759
A37
Accelerator Pedal Position Sensor
VPA1
EP1
VCP1
G–W
L–Y
ECM
E4
21
19
VPA2
EP2
VCP2
6
5
4
3
2
1
G–R
G–B
L–B
L–R
E4
E4
E4
E4
E4
26
27
18
20
VCP2
EPA2
VPA2
VCPA
EPA
VPA
–
DIAGNOSTICS
ENGINE
DI–375
569
WIRING DIAGRAM
FI7052
Depressed
Released
DI–376
–
DIAGNOSTICS
ENGINE
570
INSPECTION PROCEDURE
HINT:
Read freeze frame data using
the hand−held tester
. Freeze frame data records the engine conditions when
a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was
running or stopped, if the engine was warmed up or not, if the air–fuel ratio was lean or rich, as well as other
data from the time when a malfunction occurred.
1
Connect hand–held tester, and read the voltage for accelerator pedal position
sensor data.
PREPARATION:
(a)
Connect the hand–held tester to the DLC3.
(b)
Turn the ignition switch ON and push the hand–held tes-
ter main switch ON.
(c)
Enter the following menu: DIAGNOSIS / ENHANCED
OBD II / DATA LIST / ETCS / ACCEL POS #1 and ACCEL
POS #2.
CHECK:
Read the voltage for the accelerator pedal position sensor data.
OK:
Standard:
Accelerator pedal
ACCEL POS #1
ACCEL POS #2
Released
0.5 to 1.1 V
1.2 to 2.0 V
Depressed
2.6 to 4.5 V
3.4 to 5.3 V
OK
Go to step 5.
NG
A21022
Wire Harness Side:
A37
Accelerator Pedal Position Sensor
VCP2
EPA2 VPA2 VCPA EPA
VPA
B17417
E4
VPA2
VCPA
VPA
EPA2
EPA
VCP2
–
DIAGNOSTICS
ENGINE
DI–377
571
2
Check for open and short in harness and connector in VCPA, VCP2, VPA, VPA2
EPA and EPA2 circuit between ECM and accelerator pedal position sensor.
PREPARATION:
(a)
Disconnect the A37 accelerator pedal position sensor
connector.
(b)
Disconnect the E4 ECM connector.
CHECK:
Measure the resistance between the wire harness side connec-
tors.
OK:
Standard:
Tester Connection
Specified Condition
VPA (A37–6) – VPA (E4–18)
Below 1
Ω
EPA (A37–5) – EPA (E4–20)
Below 1
Ω
VCPA (A37–4) – VCPA (E4–26)
Below 1
Ω
VPA2 (A37–3) – VPA2 (E4–19)
Below 1
Ω
EPA2 (A37–2) – EPA2 (E4–21)
Below 1
Ω
VCP2 (A37–1) – VCP2 (E4–27)
Below 1
Ω
VPA (A37–6) or VPA (E4–18) –
Body ground
10 k
Ω
or higher
EPA (A37–5) or EPA (E4–20) –
Body ground
10 k
Ω
or higher
VCPA (A37–4) or VCPA (E4–26) –
Body ground
10 k
Ω
or higher
VPA2 (A37–3) or VPA2 (E4–19) –
Body ground
10 k
Ω
or higher
EPA2 (A37–2) or EPA2 (E4–21) –
Body ground
10 k
Ω
or higher
VCP2 (A37–1) or VCP2 (E4–27) –
Body ground
10 k
Ω
or higher
NG
Repair or replace harness and connector.
OK
B17448
EPA (–)
VCPA (+)
EPA2 (–)
VCP2 (+)
Accelerator Pedal
Position Sensor
Connector
E4
A37
DI–378
–
DIAGNOSTICS
ENGINE
572
3
Check voltage between terminals VCPA and EPA, and VCP2 and EPA2 of ECM
terminals.
PREPARATION:
(a)
Turn the ignition switch ON.
(b)
Disconnect the A37 accelerator pedal position sensor
connector.
CHECK:
Measure the voltage between the specified terminals of the E4
ECM connector.
OK:
Standard:
Tester Connection
Specified Condition
VCPA (E4–26) – EPA (E4–20)
4.5 to 5.5 V
VCP2 (E4–27) – EPA2 (E4–21)
4.5 to 5.5 V
NG
Replace ECM (See page
OK
4
Replace accelerator pedal assembly (See page
).
Go
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