Page 521 of 3000

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–215
ES
(b) Turn the ignition switch to the ON position.
(c) Turn the tester on.
(d) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DATA LIST / PRIMARY / MAF and
COOLANT TEMP.
(e) Allow the engine to idle until the COOLANT TEMP
reaches 75
C (167F) or more.
(f) Read the MAF with the engine in an idling condition and
at an engine speed of 2500 rpm.
Standard:
MAF while engine is idling:
Between 1.8 g/s and 4.7 g/s (shift position: N, A/
C: OFF).
MAF at engine speed of 2500 rpm:
Between 7.4 g/s and 18.9 g/s (shift position: N, A/
C: OFF).
NG
OK
(a) Check the intake system for vacuum leakage (See page
IT-1).
OK:
No leakage from intake system.
NG
OK
NG
OK
(a) Check the fuel pressure (See page FU-7).
NG
OKREPLACE MASS AIR FLOW METER
REPLACE ECM
18CHECK INTAKE SYSTEM
REPAIR OR REPLACE INTAKE SYSTEM
19CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN)
(See page ES-92)
ADJUST VALVE TIMING
20CHECK FUEL PRESSURE
CHECK AND REPLACE FUEL PUMP,
PRESSURE REGULATOR, FUEL PIPE LINE
AND FILTER
Page 522 of 3000

ES–2162GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Turn the tester on.
(d) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DATA LIST / PRIMARY /
COOLANT TEMP.
(e) Read the COOLANT TEMP twice, when the engine is
both cold and warmed up.
Standard:
With cold engine:
Same as ambient air temperature.
With warm engine:
Between 75
C and 95C (167F and 203F).
NG
OK
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Turn the tester on.
(d) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DATA LIST / PRIMARY / MAF and
COOLANT TEMP.
(e) Allow the engine to idle until the COOLANT TEMP
reaches 75
C (167F) or more.
(f) Read the MAF with the engine in an idling condition and
at an engine speed of 2500 rpm.
Standard:
MAF while engine is idling:
Between 1.8 g/s and 4.7 g/s (shift position: N, A/
C: OFF).
MAF at engine speed of 2500 rpm:
Between 7.4 g/s and 18.9 g/s (shift position: N, A/
C: OFF).
NG
OK
21READ VALUE OF INTELLIGENT TESTER (COOLANT TEMP)
REPLACE ENGINE COOLANT
TEMPERATURE SENSOR
22READ VALUE OF INTELLIGENT TESTER (MASS AIR FLOW METER)
REPLACE MASS AIR FLOW METER
Page 523 of 3000

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–217
ES
(a) Remove the ignition coil and the spark plug of the
misfiring cylinder.
(b) Measure the spark plug electrode gap.
Maximum gap:
1.3 mm (0.0512 in.)
(c) Check the electrode for carbon deposits.
Recommended spark plug:
NOTICE:
If the electrode gap is larger than standard, replace
the spark plug. Do not adjust the electrode gap.
NG
OK
(a) Disconnect the injector connectors to prevent the engine
from starting.
CAUTION:
Always disconnect all injector connectors.
NOTICE:
Do not crank the engine for more than 2 seconds.
(b) Remove the ignition coil from the cylinder head.
(c) Install the spark plug onto the ignition coil.
(d) Attach the spark plug assembly to the cylinder head.
(e) Crank the engine for less than 2 seconds and check the
spark.
OK:
Sparks jump across electrode gap.
(f) Install the ignition coil.
(g) Reconnect the injector connectors.
NG
OK
(a) Measure the cylinder compression pressure of the
misfiring cylinder (See page EM-3).
NG
OK
23CHECK SPARK PLUG
A126880E03
Manufacturer Product
DENSO FK20HR11
REPLACE SPARK PLUG (See page IG-10)
24CHECK FOR SPARKS AND IGNITION (SPARK TEST)
A136826
Go to step 29
25CHECK CYLINDER COMPRESSION PRESSURE OF MISFIRING CYLINDER
CHECK ENGINE TO DETERMINE CAUSE OF
LOW COMPRESSION
Page 524 of 3000

ES–2182GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(a) Disconnect the injector connector (of the misfiring
cylinder).
(b) Disconnect the E11 ECM connector.
(c) Turn the ignition switch to the ON position.
(d) Measure the voltage and resistance according to the
value(s) in the table below.
(e) Measure the resistance and voltage according to the
values in the table below.
Standard:
Cylinder No. 1
Cylinder No. 2
Cylinder No. 3
Cylinder No. 4
Cylinder No. 5
Cylinder No. 6
NG
26CHECK HARNESS AND CONNECTOR (ECM - INJECTOR)
A114616E08
Tester Connection Specified Condition
I23-1 - Ground 11 to 14 V
I23-2 - Ground 10 k
or higher
I23-1 - #10 (E11-2) Below 1
Tester Connection Specified Condition
I24-1 - Ground 11 to 14 V
I24-2 - Ground 10 k
or higher
I24-1 - #20 (E11-3) Below 1
Tester Connection Specified Condition
I25-1 - Ground 11 to 14 V
I25-2 - Ground 10 k
or higher
I25-1 - #30 (E11-4) Below 1
Tester Connection Specified Condition
I26-1 - Ground 11 to 14 V
I26-2 - Ground 10 k
or higher
I26-1 - #40 (E11-5) Below 1
Tester Connection Specified Condition
I27-1 - Ground 11 to 14 V
I27-2 - Ground 10 k
or higher
I27-1 - #50 (E11-6) Below 1
Tester Connection Specified Condition
I28-1 - Ground 11 to 14 V
I28-2 - Ground 10 k
or higher
I28-1 - #60 (E11-7) Below 1
REPAIR OR REPLACE HARNESS OR
CONNECTOR
Page 525 of 3000

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–219
ES
OK
(a) Turn the ignition switch to the ON position.
(b) Measure the voltage according to the value(s) in the
table below.
Standard voltage
NG
OK
(a) Check the injector injection (whether fuel volume is high
or low, and whether injection pattern is poor) (See page
FU-16).
NG
OK
(a) Change the installed spark plug to a spark plug that
functions normally.
(b) Perform a spark test.
CAUTION:
Always disconnect all injector connectors.
NOTICE:
Do not crank the engine for more than 2 seconds.
(1) Install the spark plug to the ignition coil and connect
the ignition coil connector.
(2) Disconnect the injector connector.
(3) Ground the spark plug.
(4) Check if sparks occur while the engine is being
cranked.
27INSPECT ECM TERMINAL OF MISFIRING CYLINDER (#10, #20, #30, #40, #50 AND /OR #60
VOLTAGE)
A162489E04
Tester Connection Specified Condition
#10 (E11-2) - E01 (E9-7) 9 to 14 V
#20 (E11-3) - E01 (E9-7) 9 to 14 V
#30 (E11-4) - E01 (E9-7) 9 to 14 V
#40 (E11-5) - E01 (E9-7) 9 to 14 V
#50 (E11-6) - E01 (E9-7) 9 to 14 V
#60 (E11-7) - E01 (E9-7) 9 to 14 V
REPAIR OR REPLACE HARNESS OR
CONNECTOR (BATTERY - ECM)
28CHECK FUEL INJECTOR OF MISFIRING CYLINDER
REPLACE FUEL INJECTOR ASSEMBLY
REPLACE ECM
29CHANGE TO NORMAL SPARK PLUG AND CHECK SPARK OF MISFIRING CYLINDER
Page 526 of 3000
ES–2202GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
OK:
Sparks jump across electrode gap.
NG
OK
NG
OK Go to step 30
REPLACE SPARK PLUG (See page IG-10)
30CHANGE TO NORMAL IGNITION COIL AND CHECK SPARK OF MISFIRING CYLINDER
REPLACE ECM
REPLACE IGNITION COIL
Page 527 of 3000

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–221
ESDESCRIPTION
A flat type knock sensor (non-resonant type) has a structure that can detect vibrations over a wide band of
frequencies: between approximately 6 kHz and 15 kHz.
Knock sensors are fitted onto the engine block to detect engine knocking.
The knock sensor contains a piezoelectric element which generates a voltage when the engine block
vibrates due to knocking. Any occurrence of engine knocking can be suppressed by delaying the ignition
timing.
HINT:
When any of DTCs P0327, P0328, P0332 and P0333 are set, the ECM enters fail-safe mode. During fail-
safe mode, the ignition timing is delayed to its maximum retardation. Fail-safe mode continues until the
ignition switch is turned off.
Reference: Inspection using an oscilloscope
The correct waveform is as shown.
DTC P0327Knock Sensor 1 Circuit Low Input (Bank 1 or
Single Sensor)
DTC P0328Knock Sensor 1 Circuit High Input (Bank 1 or
Single Sensor)
DTC P0332 Knock Sensor 2 Circuit Low Input (Bank 2)
DTC P0333 Knock Sensor 2 Circuit High Input (Bank 2)
DTC No. DTC Detection Condition Trouble Area
P0327
P0332Output voltage of knock sensor 1 or 2 is less than 0.5 V
(1 trip detection logic)• Short in knock sensor 1 or 2 circuit
• Knock sensor 1 or 2
•ECM
P0328
P0333Output voltage of knock sensor 1 or 2 is more than 4.5
V (1 trip detection logic)• Open in knock sensor 1 or 2 circuit
• Knock sensor 1 or 2
•ECM
Item Content
Terminals KNK1 - EKNK or KNK2 - EKN2
Equipment Settings 0.01 to 10 V/Division, 0.01 to 10 ms./Division
Conditions Keep engine speed at 4000 rpm with warm engine
A140638E01
Page 528 of 3000

ES–2222GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
MONITOR DESCRIPTION
The knock sensor, located on the cylinder block, detects spark knock. When a spark knock occurs, the
piezoelectric element of the sensor vibrates. When the ECM detects a voltage in this frequency range, it
retards the ignition timing to suppress the spark knock.
The ECM also senses background engine noise with the knock sensor and uses this noise to check for
faults in the sensor. If the knock sensor signal level is too low for more than 10 seconds, or if the knock
sensor output voltage is outside the normal range, the ECM interprets this as a fault in the knock sensor
and sets a DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
Knock Sensor Range Check (Low voltage) P0327 and P0332:
Knock Sensor Range Check (High voltage) P0328 and P0333:
Related DTCsP0327: Knock sensor (Bank 1) open/short (Low voltage)
P0328: Knock sensor (Bank 1) open/short (High voltage)
P0332: Knock sensor (Bank 2) open/short (Low voltage)
P0333: Knock sensor (Bank 2) open/short (High voltage)
Required Sensors / Components (Main) Knock sensor (Bank 1 and 2)
Required Sensors / Components (Related) -
Frequency of Operation Continuous
Duration 1 second
MIL Operation Immediate
Sequence of Operation None
The monitor will run whenever these DTCs are not
presentNone
Battery voltage 10.5 V or more
Time after engine start 5 seconds or more
Ignition switch ON
Starter OFF
Knock sensor voltage Less than 0.5 V
Knock sensor voltage More than 4.5 V