Toyota FJ Cruiser (GSJ 10, 15 series). Instruction - part 40

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES–115

ES

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

P0115:

P0117:

P0118:

COMPONENT OPERATING RANGE

WIRING DIAGRAM

Required Sensors/Components (Main)

Engine coolant temperature sensor

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

0.5 seconds

MIL Operation

Immediate

Sequence of Operation

None

Monitor runs whenever following DTCs not present

None

Engine coolant temperature sensor voltage

Less than 0.14 V, or more than 4.91 V

Engine coolant temperature sensor voltage

Less than 0.14 V

Engine coolant temperature sensor voltage

More than 4.91 V

Engine coolant temperature sensor voltage

0.14 V to 4.91 V

B19

Engine Coolant Temperature Sensor

2

1

5V

R

THW

E2

ECM

B1

B1

28

21

A133459E01

ES–116

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES

INSPECTION PROCEDURE

HINT:
•

If other DTCs relating to different systems that have terminal E2 as the ground terminal are output 
simultaneously, terminal E2 may have an open circuit.

•

Read freeze frame data using an intelligent tester. Freeze frame data record the engine condition when 
malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle 
was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and 
other data, from the time the malfunction occurred.

(a) Connect an intelligent tester to the DLC3.
(b) Turn the ignition switch ON.
(c) Turn the tester ON.
(d) Select the following menu items: DIAGNOSIS / 

ENHANCED OBD II / DATA LIST / PRIMARY / 
COOLANT TEMP.

(e) Read the value displayed on the tester.

Standard:

80

°C to 97°C (176°F to 207°F) with warm engine.

Result

HINT:
•

If there is an open circuit, the intelligent tester 
indicates -40

°C (-40°F).

•

If there is a short circuit, the intelligent tester indicates 
140

°C (284°F) or higher.

B

C

A

1

READ VALUE USING INTELLIGENT TESTER (ENGINE COOLANT TEMPERATURE)

Temperature Displayed

Proceed To

-40

°C (-40°F)

A

140

°C (284°F) or higher

B

80

°C to 97°C (176°F to 207°F)

C

              Go to step 4

CHECK FOR INTERMITTENT PROBLEMS

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES–117

ES

(a) Disconnect the B19 Engine Coolant Temperature (ECT) 

sensor connector.

(b) Connect terminals 1 and 2 of the ECT sensor connector 

on the wire harness side.

(c) Connect an intelligent tester to the DLC3.
(d) Turn the ignition switch ON.
(e) Turn the tester ON.
(f)

Select the following menu items: DIAGNOSIS / 
ENHANCED OBD II / DATA LIST / PRIMARY / 
COOLANT TEMP.

(g) Read the value displayed on the tester.

Standard:

140

°C (284°F) or higher

(h) Reconnect the ECT sensor connector.

OK

NG

(a) Disconnect the B19 ECT sensor connector.
(b) Connect terminals THW and E2 of the B1 ECM 

connector.
HINT:
Before checking, do visual and contact pressure checks 
on the ECM connector.

(c) Connect an intelligent tester to the DLC3.
(d) Turn the ignition switch ON.
(e) Turn the tester ON.
(f)

Select the following menu items: DIAGNOSIS / 
ENHANCED OBD II / DATA LIST / PRIMARY / 
COOLANT TEMP.

(g) Read the value displayed on the tester.

Standard:

140

°C (284°F) or higher

(h) Reconnect the ECT sensor connector.

OK

2

READ VALUE USING INTELLIGENT TESTER (CHECK FOR OPEN IN WIRE HARNESS)

B19

ECT Sensor

Wire Harness Side:

B19

Front View

ECT Sensor Connector

ECM

THW

E2

A116164E02

CONFIRM GOOD CONNECTION TO 
SENSOR. IF OK, REPLACE ENGINE 
COOLANT TEMPERATURE SENSOR (See 
page 

ES-424

)

3

READ VALUE USING INTELLIGENT TESTER (CHECK FOR OPEN IN ECM)

B1

ECT Sensor

ECM Connector

ECM

THW

E2

THW E2

B19

A116162E06

REPAIR OR REPLACE HARNESS OR 
CONNECTOR

ES–118

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES

NG

(a) Disconnect the B19 ECT sensor connector.
(b) Connect an intelligent tester to the DLC3.
(c) Turn the ignition switch ON.
(d) Turn the tester ON.
(e) Select the following menu items: DIAGNOSIS / 

ENHANCED OBD II / DATA LIST / PRIMARY / 
COOLANT TEMP.

(f)

Read the value displayed on the tester.
Standard:

-40

°C (-40°F)

(g) Reconnect the ECT sensor connector.

OK

NG

(a) Disconnect the B1 ECM connector.
(b) Connect an intelligent tester to the DLC3.
(c) Turn the ignition switch ON.
(d) Turn the tester ON.
(e) Select the following menu items: DIAGNOSIS / 

ENHANCED OBD II / DATA LIST / PRIMARY / 
COOLANT TEMP.

(f)

Read the value displayed on the tester.
Standard:

-40

°C (-40°F)

(g) Reconnect the ECM connector.

OK

NG

CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM (See page 

ES-446

)

4

READ VALUE USING INTELLIGENT TESTER (CHECK FOR SHORT IN WIRE HARNESS)

ECT Sensor

ECM

THW

E2

B19

A084869E57

REPLACE ENGINE COOLANT 
TEMPERATURE SENSOR (See page 

ES-424

)

5

READ VALUE USING INTELLIGENT TESTER (CHECK FOR SHORT IN ECM)

B1

ECM

ECM Connector

B19

ECT Sensor

THW

E2

A116163E04

REPAIR OR REPLACE HARNESS OR 
CONNECTOR

REPLACE ECM (See page 

ES-446

)