Page 509 of 3000
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–203
ES
(a) Remove the FUEL PUMP relay from the engine room
junction block.
(b) Disconnect the E11 ECM connector.
(c) Measure the resistance according to the value(s) in the
table below.
Standard resistance
(d) Reconnect the ECM connector.
(e) Reinstall the FUEL PUMP relay.
NG
OK
3CHECK HARNESS AND CONNECTOR (FUEL PUMP RELAY - ECM)
A163154E03
Tester Connection Specified Condition
FUEL PUMP relay terminal 1 - FPR (E11-30) Below 1
FUEL PUMP relay terminal 1 or FPR (E11-30) - Body
Ground10 k or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR (FUEL PUMP RELAY - ECM)
REPLACE ECM (See page ES-498)
Page 557 of 3000
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–251
ES
Standard voltage
(e) Reconnect the ignition coil with igniter connector.
NG
OK
(a) Remove the IG2 relay from the No. 3 engine room R/B.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
(c) Reinstall the IG2 relay.
NG
OK
Tester Connection Specified Condition
+B (I1-1) - GND (I1-4) 9 to 14 V
+B (I2-1) - GND (I2-4) 9 to 14 V
+B (I3-1) - GND (I3-4) 9 to 14 V
+B (I4-1) - GND (I4-4) 9 to 14 V
+B (I5-1) - GND (I5-4) 9 to 14 V
+B (I6-1) - GND (I6-4) 9 to 14 V
Go to step 8
REPLACE IGNITION COIL ASSEMBLY (See page IG-8)
8INSPECT RELAY (IG2 RELAY)
B016200
Tester Connection Specified Condition
3 - 5 10 k
or higher
3 - 5Bellow 1
(when battery voltage applied to terminals 1 and 2)
REPLACE RELAY (IG2 RELAY)
REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION COIL ASSEMBLY - IGNITION
SWITCH)
Page 590 of 3000
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–297
ES
TYPICAL MALFUNCTION THRESHOLDS
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition
information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data
can be helpful in determining whether the vehicle was running or stopped, whether the engine was
warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of
a malfunction.
(a) Check whether the stop lights turn on and off normally
when the brake pedal is depressed and released.
OK:
Stop lights turn on when brake pedal is depressed.
NG
OK
Switch status ON stuck Remain ON during GO and STOP 5 times
1CHECK OPERATION OF STOP LIGHT
A162496E02
GO TO TAILLIGHT RELAY CIRCUIT (See
page LI-114)
Page 612 of 3000
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–319
ES
(a) Check that the battery is not depleted.
NG
OK
5INSPECT BATTERY
REPLACE BATTERY
CHECK AND REPLACE ENGINE ROOM RELAY BLOCK
Page 620 of 3000

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–327
ES
MONITOR DESCRIPTION
While the engine is being cranked, the positive battery voltage is applied to terminal STA of the ECM.
If the ECM detects the Starter Control (STA) signal while the vehicle is being driven, it determines that
there is a malfunction in the STA circuit. The ECM then illuminates the MIL and sets the DTC.
This monitor runs when the vehicle is driven at 12.4 mph (20 km/h) for over 20 seconds.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
DTC P0617 Starter Relay Circuit High
DTC No. DTC Detection Condition Trouble Area
P0617When conditions (a), (b) and (c) are met, positive (+B)
battery voltage 10.5 V or more is applied to ECM for 20
seconds (1 trip detection logic):
(a) Vehicle speed more than 12.4 mph (20 km/h)
(b) Engine speed more than 1000 rpm
(c) STA signal ON• Park/Neutral Position (PNP) switch
• Starter relay circuit
• Ignition switch
•ECM
Related DTCs P0617: Starter signal
Required Sensors / Components (Main) STARTER relay, PNP switch, Clutch start switch and Ignition switch
Required Sensors / Components (Related) Vehicle Speed Sensor (VSS), Crankshaft Position (CKP) sensor
Frequency of Operation Continuous
Duration 20 seconds
MIL Operation Immediate
Sequence of Operation None
The monitor will run whenever these DTCs are not
presentNone
Battery voltage 10.5 V or more
Vehicle speed 12.43 mph (20 km/h) or more
Engine speed 1000 rpm or more
Starter signal ON
Page 657 of 3000

ES–3642GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
HINT:
• DTCs P2195 and P2196 indicate malfunctions related to the bank 1 A/F sensor circuit.
• DTCs P2197 and P2198 indicate malfunctions related to the bank 2 A/F sensor circuit.
• Bank 1 refers to the bank that includes cylinder No. 1.
• Bank 2 refers to the bank that includes cylinder No. 2.
• When any of these DTCs are set, check the A/F sensor voltage output by selecting the following menu
items on the intelligent tester: DIAGNOSIS / ENHANCED OBDII / DATA LIST / PRIMARY / AFS B1S1.
• Short-term fuel trim values can also be read using the intelligent tester.
• The ECM regulates the voltages at the A1A+, A2A+, A1A- and A2A- terminals of the ECM to a
constant level. Therefore, the A/F sensor voltage output cannot be confirmed without using the
intelligent tester.
• If an A/F sensor malfunction is detected, the ECM sets a DTC.
MONITOR DESCRIPTION
Sensor voltage detection monitor
Under the air-fuel ratio feedback control, if the A/F sensor voltage output indicates rich or lean for a certain
period of time, the ECM determines that there is a malfunction in the A/F sensor. The ECM illuminates the
MIL and sets a DTC.
Example:
If the A/F sensor voltage output is less than 2.8 V (very rich condition) for 10 seconds, despite the HO2
sensor voltage output being less than 0.6 V, the ECM sets DTC P2196. Alternatively, if the A/F sensor
voltage output is more than 3.8 V (very lean condition) for 10 seconds, despite the HO2 sensor voltage
output being 0.15 V or more, DTC P2195 is set.
Sensor current detection monitor
A rich air-fuel mixture causes a low A/F sensor current, and a lean air-fuel mixture causes a high A/F
sensor current. Therefore, the sensor output becomes low during acceleration, and it becomes high
during deceleration with the throttle valve fully closed. The ECM monitors the A/F sensor current during
fuel-cut and detects any abnormal current values.
If the A/F sensor output is 3.6 mA or more for more than 3 seconds of cumulative time, the ECM interprets
this as a malfunction in the A/F sensor and sets DTC P2195 (high-side stuck). If the A/F sensor output is
1.0 mA or less for more than 3 seconds of cumulative time, the ECM sets DTC P2196 (low-side stuck).
DTC No. DTC Detection Condition Trouble Area
P2195
P2197Conditions (a) and (b) continue for 2 seconds or more
(2 trip detection logic):
(a) Air-Fuel Ratio (A/F) sensor voltage is more than 3.8
V
(b) Heated Oxygen (HO2) sensor voltage is 0.15 V or
more• Open or short in A/F sensor (bank 1, 2 sensor 1)
circuit
• A/F sensor (bank 1, 2 sensor 1)
• A/F sensor (bank 1, 2 sensor 1) heater
• A/F sensor heater relay
• A/F sensor heater and relay circuits
• Intake system
• Fuel pressure
• Injector
•ECM
P2195
P2197While fuel-cut operation is performed (during vehicle
deceleration), air-furl ratio (A/F) sensor current is 3.6
mA or more for 3 seconds (2 trip detection logic)• A/F sensor
•ECM
P2196
P2198Conditions (a) and (b) continue for 2 seconds or more
(2 trip detection logic):
(a) A/F sensor voltage is less than 2.8 V
(b) HO2 sensor voltage is less than 0.6 V• Open or short in A/F sensor (bank 1, 2 sensor 1)
circuit
• A/F sensor (bank 1, 2 sensor 1)
• A/F sensor (bank 1, 2 sensor 1) heater
• A/F sensor heater relay
• A/F sensor heater and relay circuits
• Intake system
• Fuel pressure
•Injector
•ECM
P2196
P2198While fuel-cut operation is performed (during vehicle
deceleration), air-furl ratio (A/F) sensor current is less
than 1.4 mA for 3 seconds (2 trip detection logic)• A/F sensor
•ECM
Page 669 of 3000

ES–3762GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(a) Remove the A/F relay from No. 6 engine room relay
block.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
(c) Reinstall the A/F relay.
NG
OK
(a) Disconnect the A5 or A6 A/F sensor connector.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage according to the value(s) in the
table below.
Standard voltage
(d) Turn the ignition switch off.
(e) Disconnect the E10 ECM connector.
(f) Measure the resistance according to the value(s) in the
table below.
Standard resistance :
Check for open
Check for short
11INSPECT RELAY (A/F RELAY)
B016200
Tester Connection Specified Condition
3 - 5 10 k
or higher
3 - 5Below 1
(when battery voltage applied to terminals 1 and 2)
REPLACE RELAY (A/F RELAY)
12CHECK HARNESS AND CONNECTOR (A/F SENSOR - ECM)
A136175E10
Tester Connection Specified Condition
+B (A5-2) - Body ground 9 to 14 V
+B (A6-2) - Body ground 9 to 14 V
Tester Connection Specified Condition
HT (A5-1) - HA1A (E10-2) Below 1
AF+ (A5-3) - A1A+ (E10-22) Below 1
AF- (A5-4) - A1A- (E10-30) Below 1
HT (A6-1) - HA2A (E10-1) Below 1
AF+ (A6-3) - A2A+ (E10-23) Below 1
AF- (A6-4) - A2A- (E10-31) Below 1
Tester Connection Specified Condition
HT (A5-1) or HA1A (E10-2) - Body ground 10 k
or higher
AF+ (A5-3) or A1A+ (E10-22) - Body ground 10 k
or higher
AF- (A5-4) or A1A- (E10-30) - Body ground 10 k
or higher
HT (A6-1) or HA2A (E10-1) - Body ground 10 k
or higher
AF+ (A6-3) or A2A+ (E10-23) - Body ground 10 k
or higher
AF- (A6-4) or A2A- (E10-31) - Body ground 10 k
or higher
Page 673 of 3000

ES–3802GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
HINT:
• Although the DTC titles say oxygen sensor, these DTCs relate to the Air-Fuel Ratio (A/F) sensor.
• Sensor 1 refers to the sensor mounted in front of the Three-Way Catalytic Converter (TWC) and
located near the engine assembly.
DESCRIPTION
Refer to DTC P2195 (See page ES-355).
DTC P2238Oxygen (A/F) Sensor Pumping Current Circuit
Low (Bank 1 Sensor 1)
DTC P2239Oxygen (A/F) Sensor Pumping Current Circuit
High (Bank 1 Sensor 1)
DTC P2241Oxygen (A/F) Sensor Pumping Current Circuit
Low (Bank 2 Sensor 1)
DTC P2242Oxygen (A/F) Sensor Pumping Current Circuit
High (Bank 2 Sensor 1)
DTC P2252Oxygen (A/F) Sensor Reference Ground Circuit
Low (Bank 1 Sensor 1)
DTC P2253Oxygen (A/F) Sensor Reference Ground Circuit
High (Bank 1 Sensor 1)
DTC P2255Oxygen (A/F) Sensor Reference Ground Circuit
Low (Bank 2 Sensor 1)
DTC P2256Oxygen (A/F) Sensor Reference Ground Circuit
High (Bank 2 Sensor 1)
DTC No. DTC Detection Condition Trouble Area
P2238
P2241•Case 1:
Condition (a) or (b) continues for 5.0 seconds or
more (1 trip detection logic):
(a) AF+ voltage is 0.5 V or less
(b) (AF+) - (AF-) = 0.1 V or less
•Case 2:
A/F sensor admittance: Less than 0.022 1/
(2 trip
detection logic)• Open or short in A/F sensor (bank 1, 2 sensor 1)
circuit
• A/F sensor (bank 1, 2 sensor 1)
• A/F sensor heater (bank 1, 2 sensor 1)
• A/F sensor heater relay
• A/F sensor heater and relay circuits
•ECM
P2239
P2242AF+ voltage is more than 4.5 V for 5.0 seconds or more
(2 trip detection logic)• Open or short in A/F sensor (bank 1, 2 sensor 1)
circuit
• A/F sensor (bank 1, 2 sensor 1)
• A/F sensor heater
• A/F sensor heater relay
• A/F sensor heater and relay circuits
•ECM