Toyota FJ Cruiser (GSJ 10, 15 series). Instruction - part 38

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES–107

ES

WIRING DIAGRAM

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 / INTAKE 
AIR.

(e) Read the value displayed on the tester.

Standard:

Same as actual Intake Air Temperature (IAT).

Result

HINT:
•

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

°C (-40°F).

1

READ VALUE USING INTELLIGENT TESTER (INTAKE AIR TEMPERATURE)

B13
Intake Air Temperature Sensor

(Built into Mass Air Flow Meter)

ECM

THA

E2

E2

THA

4

5

5 V

R

B1

B1

28

22

A133458E01

Temperature Displayed

Proceed To

-40

°C (-40°F)

A

140

°C (284°F) or higher

B

Same as actual IAT

C

ES–108

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES

•

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

°C (284°F) or higher.

B

C

A

(a) Disconnect the B13 Mass Air Flow (MAF) meter 

connector.

(b) Connect terminals THA and E2 of the MAF meter wire 

harness side 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 / INTAKE 
AIR.

(g) Read the value displayed on the tester.

Standard:

140

°C (284°F) or higher

(h) Reconnect the MAF meter connector.

OK

NG

              Go to step 4

CHECK FOR INTERMITTENT PROBLEMS

2

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

B13

Wire Harness Side:

Front View

MAF Meter Connector

THA

E2

THA

E2

ECM

MAF Meter Connector

A116161E02

CONFIRM GOOD CONNECTION TO 
SENSOR. IF OK, REPLACE MASS AIR FLOW 
METER (See page 

ES-409

)

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES–109

ES

(a) Disconnect the B13 MAF meter connector.
(b) Connect terminals THA 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 / INTAKE 
AIR.

(g) Read the value displayed on the tester.

Standard:

140

°C (284°F) or higher.

(h) Reconnect the MAF meter connector.

OK

NG

(a) Disconnect the B13 MAF meter 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 / INTAKE 
AIR.

(f)

Read the value displayed on the tester.
Standard:

-40

°C (-40°F)

(g) Reconnect the MAF meter connector.

OK

NG

3

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

B1

MAF Meter Connector

ECM Connector

ECM

THA

E2

THA

E2

A116162E05

REPAIR OR REPLACE HARNESS OR 
CONNECTOR

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)

MAF Meter Connector

ECM

E2

THA

A084869E16

REPLACE MASS AIR FLOW METER (See 
page 

ES-409

)

ES–110

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES

(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 / INTAKE 
AIR.

(f)

Read the value displayed on the tester.
Standard:

-40

°C (-40°F)

(g) Reconnect the ECM connector.

OK

NG

5

READ VALUE USING INTELLIGENT TESTER (CHECK FOR SHORT ECM)

B1

ECM

ECM Connector

MAF Meter Connector

THA

E2

A116163E03

REPAIR OR REPLACE HARNESS OR 
CONNECTOR

REPLACE ECM (See page 

ES-446

)