2001 TOYOTA SEQUOIA check engine

B17414
E6
ECM Connector
VV2+
VV1±
VV1+VV2±
A21029
Wire Harness Side
VVT Sensor V16
V17
BR3795OK NGClearance
± DIAGNOSTICSENGINE
DI±219
413 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check for open and short in harness and connector between ECM and VVT sen-
sor.
PREPARATION:
(a) Disconnect the VVT sensor connector.
(b) Disconnect the E6 ECM connector.
CHECK:
Measure the resistance between the wire harness side connec-
tors.
OK:
Standard:
Tester ConnectionSpecified Condition
VVT sensor (V16±1) ± VV1+ (E6±25)Below 1 W
VVT sensor (V16±2) ± VV1± (E6±24)Below 1 W
VVT sensor (V17±1) ± VV2+ (E6±18)Below 1 W
VVT sensor (V17±2) ± VV2± (E6±28)Below 1 W
VVT sensor (V16 ±1) or
VV1+ (E6±25) ± Body ground10 kW or higher
VVT sensor (V16±2) or
VV1± (E6±24) ± Body ground10 kW or higher
VVT sensor (V17 ±1) or
VV2+ (E6±18) ± Body ground10 kW or higher
VVT sensor (V17±2) or
VV2± (E6±28) ± Body ground10 kW or higher
NG Repair or replace harness or connector.
OK
3 Check sensor installation (VVT position sensor).
CHECK:
Check the VVT position sensor installation.
OK:
The VVT sensor is installed properly.
NG Tighten sensor installation bolt.
OK

DI±220
± DIAGNOSTICSENGINE
414 Author: Date:
2005 SEQUOIA (RM1146U)
4 Inspect teeth of camshaft.
PREPARATION:
Remove the cylinder head cover (See page EM±29).
CHECK:
Check the camshaft.
NG Replace camshaft.
OK
Replace Camshaft position sensor
(See page IG±7).

± DIAGNOSTICSENGINE
DI±221
415 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0351 Igniter Coil ºAº Primary/Secondary Circuit
DTC P0352 Igniter Coil ºBº Primary/Secondary Circuit
DTC P0353 Igniter Coil ºCº Primary/Secondary Circuit
DTC P0354 Igniter Coil ºDº Primary/Secondary Circuit
DTC P0355 Igniter Coil ºEº Primary/Secondary Circuit
DTC P0356 Igniter Coil ºFº Primary/Secondary Circuit
DTC P0357 Igniter Coil ºGº Primary/Secondary Circuit
DTC P0358 Igniter Coil ºHº Primary/Secondary Circuit
HINT:

These DTCs indicate a malfunction related to primary circuit.

If DTC P0351 is displayed, check No. 1 ignition coil with igniter circuit.

If DTC P0352 is displayed, check No. 2 ignition coil with igniter circuit.

If DTC P0353 is displayed, check No. 3 ignition coil with igniter circuit.

If DTC P0354 is displayed, check No. 4 ignition coil with igniter circuit.

If DTC P0355 is displayed, check No. 5 ignition coil with igniter circuit.

If DTC P0356 is displayed, check No. 6 ignition coil with igniter circuit.

If DTC P0357 is displayed, check No. 7 ignition coil with igniter circuit.

If DTC P0358 is displayed, check No. 8 ignition coil with igniter circuit.
DICF0±02

A03401
IGT Signal Waveform
IGT
GND
IGF
20 msec./Division GND
A20793
Normal Ignition signal
(IGT)
Ignition
confirmation
signal (IGF)Malfunction
Circuit Open ECM
IGFIGT
IgniterIgnition Coil
Time Ignition Coil with Igniter
± DIAGNOSTICSENGINE
DI±223
417 Author: Date:
2005 SEQUOIA (RM1146U)DTC No.
DTC Detecting ConditionTrouble Area
P0351
P0352
P0353
P0354
P0355
P0356
P0357
P0358
No IGF signal to ECM while engine is running

Open or short in IGF1 or IGF2 and IGT1 to IGT8 circuit from
ignition coil with igniter to ECM

No. 1 to No. 8 ignition coil with igniter (primary ignition)

Ignition system

ECM
Reference: Inspection using the oscilloscope.
During cranking or idling, check the waveform between termi-
nals IG1 to IG8 and E1, and IGF1, IGF2 and E1 of the E6 and
E8 ECM connectors.
MONITOR DESCRIPTION
If the ECM does not receive the IGF after sending the IGT it interprets this as a fault in the igniter and sets
a DTC.

DI±226
± DIAGNOSTICSENGINE
420 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
HINT:

If DTCs P0351, P0354, P0356 and P0357 are output simultaneously, IGF1 circuit may be open or
short.

If DTCs P0352, P0353, P0355 and P0358 are output simultaneously, IGF2 circuit may be open or
short.

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 Check spark plug and spark (See page IG±1).
NG Go to step 4.
OK

A21025
Wire Harness Side:
I1
I2
I3I4
I5I6
I7I8
Ignition Coil with Igniter Connector
B17412
E8
IGF2IGF1
ECM Connector
± DIAGNOSTICSENGINE
DI±227
421 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check for open and short in harness and connector in IGF signal circuits be-
tween ECM and ignition coil with igniter.
PREPARATION:
(a) Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil with
igniter connector.
(b) Disconnect the E8 ECM connector.
CHECK:
Check the resistance between the wire harness side connec-
tors.
OK:
Standard:
Tester ConnectionSpecified Condition
Ignition coil (I1±2) ± IGF1 (E8±24)Below 1 W
Ignition coil (I2±2) ± IGF2 (E8±25)Below 1 W
Ignition coil (I3±2) ± IGF1 (E8±24)Below 1 W
Ignition coil (I4±2) ± IGF2 (E8±25)Below 1 W
Ignition coil (I5±2) ± IGF1 (E8±24)Below 1 W
Ignition coil (I6±2) ± IGF2 (E8±25)Below 1 W
Ignition coil (I7±2) ± IGF1 (E8±24)Below 1 W
Ignition coil (I8±2) ± IGF2 (E8±25)Below 1 W
Ignition coil (I1±2) or IGF1 (E8±24) ±
Body ground10 kW or higher
Ignition coil (I2±2) or IGF2 (E8±25) ±
Body ground10 kW or higher
Ignition coil (I3±2) or IGF1 (E8±24) ±
Body ground10 kW or higher
Ignition coil (I4±2) or IGF2 (E8±25) ±
Body ground10 kW or higher
Ignition coil (I5±2) or IGF1 (E8±24) ±
Body ground10 kW or higher
Ignition coil (I6±2) or IGF2 (E8±25) ±
Body ground10 kW or higher
Ignition coil (I7±2) or IGF1 (E8±24) ±
Body ground10 kW or higher
Ignition coil (I8±2) or IGF2 (E8±25) ±
Body ground10 kW or higher
NG Repair or replace harness or connector.
OK

B17411
IGF1 IGF2(+) (+)E8
E6
E1 (±)
DI±228
± DIAGNOSTICSENGINE
422 Author: Date:
2005 SEQUOIA (RM1146U)
3 Disconnect ignition coil with igniter connector, and check voltage between ter-
minals IGF1, IGF2 and E1 of ECM connector.
PREPARATION:
(a) Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil with
igniter connector.
(b) Turn the ignition switch ON.
CHECK:
Measure the voltage between the E8 and E6 ECM connectors.
OK:
Standard:
Tester ConnectionSpecified Condition
IGF1 (E8±24) ± E1 (E6±1)4.5 to 5.5 V
IGF2 (E8±25) ± E1 (E6±1)4.5 to 5.5 V
NG Replace ECM (See page SF±80).
OK
Replace ignition coil with igniter.

A21025
Wire Harness Side:
I1
I2
I3I4
I5I6
I7I8
Ignition Coil with Igniter Connector
B17412
E8
IGT8 IGT2
IGT4
IGT5
IGT6IGT3 IGT7IGT1
ECM Connector
± DIAGNOSTICSENGINE
DI±229
423 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check for open and short in harness and connector in IGT signal circuit between
ECM and ignition coil with igniter.
PREPARATION:
(a) Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition with ig-
niter coil connector.
(b) Disconnect the E8 ECM connector.
CHECK:
Check the resistance between the wire harness side connec-
tors.
OK:
Standard:
Tester ConnectionSpecified Condition
Ignition coil (I1±2) ± IGT1 (E8±8)Below 1 W
Ignition coil (I2±2) ± IGT2 (E8±15)Below 1 W
Ignition coil (I3±2) ± IGT3 (E8±11)Below 1 W
Ignition coil (I4±2) ± IGT4 (E8±10)Below 1 W
Ignition coil (I5±2) ± IGT5 (E8±13)Below 1 W
Ignition coil (I6±2) ± IGT6 (E8±12)Below 1 W
Ignition coil (I7±2) ± IGT7 (E8±14)Below 1 W
Ignition coil (I8±2) ± IGT8 (E8±9)Below 1 W
Ignition coil (I1±2) or IGT1 (E8±8) ±
Body ground10 kW or higher
Ignition coil (I2±2) or IGT2 (E8±15) ±
Body ground10 kW or higher
Ignition coil (I3±2) or IGT3 (E8±11) ±
Body ground10 kW or higher
Ignition coil (I4±2) or IGT4 (E8±10) ±
Body ground10 kW or higher
Ignition coil (I5±2) or IGT5 (E8±13) ±
Body ground10 kW or higher
Ignition coil (I6±2) or IGT6 (E8±12) ±
Body ground10 kW or higher
Ignition coil (I7±2) or IGT7 (E8±14) ±
Body ground10 kW or higher
Ignition coil (I8±2) or IGT8 (E8±9) ±
Body ground10 kW or higher
NG Repair or replace harness or connector.
OK