Toyota FJ Cruiser (GSJ 10, 15 series). Instruction - part 347

PM–12

PARK ASSIST / MONITORING  –  CLEARANCE SONAR SYSTEM

PM

TERMINALS OF ECU

1.

CLEARANCE WARNING ECU

(a) Disconnect the E31 ECU connector.
(b) Measure the voltage of the wire harness side 

connector.

Standard voltage:

If the result is not as specified, there may be a 
malfunction on the wire harness side.

(c) Reconnect the ECU connector.
(d) Measure the voltage of the connector.

Standard voltage:

If the result is not as specified, the ECU may have a 
malfunction.

1

2

3

4

5

6

7

8

9

10

11

12

E31

I102375E02

Symbols (Terminal No.)

Wiring Color

Terminal Description

Condition

Specified Condition

+B (E31-3) - Body ground

LG - Body ground

+B power supply

Ignition switch ON, back 

sonar switch ON

11 to 14 V

Ignition switch ON, back 

sonar switch OFF

Below 1 V

E (E31-10) - Body ground

W-B - Body ground

Body ground

Always

Below 1 V

Symbols (Terminal No.)

Wiring Color

Terminal Description

Condition

Specified Condition

BBZ (E31-2) - E (E 31-10)

L-B - W-B

Buzzer input

Ignition switch ON, back sonar 

switch ON

Pulse generation

Ignition switch ON, back sonar 

switch OFF

Below 1 V

S6 (E31-12) - E1 (E31-11)

P - Y

No. 1 ultrasonic sensor 

(LH)

When signal transmitted from 

ECU to No. 1 ultrasonic 

sensor (LH)

Pulse generation

S5 (E31-6) - E2 (E31-5)

B - W

No. 1 ultrasonic sensor 

(RH)

When signal transmitted from 

ECU to No. 1 ultrasonic 

sensor (RH)

RL (E31-8) - Body ground

R-Y - Body ground

Back-up light switch signal 

input

Ignition switch ON, shift lever 

in reverse position

11 to 14 V

Ignition switch ON, shift lever 

except reverse position

Below 1 V

PARK ASSIST / MONITORING  –  CLEARANCE SONAR SYSTEM

PM–13

PM

DESCRIPTION

This circuit sends a signal of the back-up light switch or park/neutral position switch to the clearance 
warning ECU.

WIRING DIAGRAM

Back-up Light Circuit

Clearance Warning ECU

RL

Back-up Light Switch

*1

IG1

AM1

AM1

IG1

Ignition Switch

ALT

Park/Neutral Position Switch

*2

RB

RL

R

*2: For Automatic  Tranmission

*1: For Manual  Transmission

Battery

*1

*1

*2

*2

I102664E01

PM–14

PARK ASSIST / MONITORING  –  CLEARANCE SONAR SYSTEM

PM

INSPECTION PROCEDURE

(a) For manual transmission.

(1) Remove the back-up light switch.
(2) Measure the resistance of the switch.

Standard resistance

(3) Reinstall the back-up light switch.

(b) For automatic transmission.

(1) Disconnect the B35 park / neutral position switch 

connector.

(2) Measure the resistance.

Standard resistance

(3) Reconnect the park / neutral position switch 

connector.

NG

OK

1

INSPECT BACK-UP LIGHT SWITCH OR PARK/NEUTRAL POSITION SWITCH

1

2

Component Side:

Back-up Light Switch

I102381E01

Tester Connection

Switch Condition

Specified Condition

1 - 2

Pushed

Below 1 

Ω

Not pushed

10 k

Ω or higher

Component Side:

RB

RL

Park / Neutral Position Switch

C110340E31

Tester Connection

Shift Position

Specified Condition

B35-2 (RB) - B35-1 (RL)

R

Below 1 

Ω

B35-2 (RB) - B35-1 (RL)

Except R

10 k

Ω or higher

REPLACE BACK-UP LIGHT SWITCH OR 
PARK/NEUTRAL POSITION SWITCH

PARK ASSIST / MONITORING  –  CLEARANCE SONAR SYSTEM

PM–15

PM

(a) Disconnect the B35 or B42 switch connector.
(b) Disconnect the E31clearance warning ECU connector.
(c) Measure the voltage of the wire harness side connector.

Standard voltage
For manual transmission:

For automatic transmission:

(d) Measure the resistance of the wire harness side 

connectors.
Standard resistance
For manual transmission:

For automatic transmission:

(e) Reconnect the switch connector.
(f)

Reconnect the  ECU connector.

NG

OK

2

CHECK HARNESS AND CONNECTOR (SWITCH - CLEARANCE WARNING ECU AND 
BATTERY)

1

2

1 2 3 4 5 6

7 8 9 10 11 12

1

2

3

5 6

7

8 9

4

Wire Harness Side:

B35

RB

Back-up Light Switch Connector

Clearance Warning ECU Connector

Park / Neutral Position Switch Connector

Front View

Front View

Front View

B42

E31

RL

(For M/T)

(For A/T)

RL

I102665E01

Tester Connection

Switch Condition

Specified Condition

B42-2 - Body ground

Ignition switch ON

11 to 14 V

Tester Connection

Switch Condition

Specified Condition

B35-2 (RB) - Body 

ground

Ignition switch ON

11 to 14 V

Tester Connection

Specified Condition

B42-1 -  E31-8 (RL)

Below 1 

Ω

Tester Connection

Specified Condition

B35-1 (RL) - E31-8 (RL)

Below 1 

Ω

REPAIR OR REPLACE HARNESS OR 
CONNECTOR

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE