Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Back-up Light Circuit

DESCRIPTION

The power distribution box assembly controls the back-up lights via the BKUP LP relay.

WIRING DIAGRAM

for HEV Model

for Gasoline Model

PROCEDURE

1.

CHECK VEHICLE TYPE

(a) Check vehicle type.

Result

Proceed to

for HEV Model

A

for Gasoline Model

B

B

GO TO STEP 10

A

2.

READ VALUE USING GTS

(a) Turn the ignition switch to ON.

(b) Move the shift lever to R.

(c) Read the Data List according to the display on the GTS.

Body Electrical > Power Distribution Box > Data List

Tester Display

Measurement Item

Normal Condition

Reference Value

Diagnostic Note

Back-up Light Fuse Shut Off Status

Back-up light fuse shut off status

OFF or ON

OFF: Fuse has no shut off history

ON: Fuse has shut off history

-

Body Electrical > Power Distribution Box > Data List

Tester Display

Back-up Light Fuse Shut Off Status

OK:

The Data List value displays "OFF".

NG

GO TO STEP 8

OK

3.

READ VALUE USING GTS

(a) Read the Data List according to the display on the GTS.

Body Electrical > Power Distribution Box > Data List

Tester Display

Measurement Item

Normal Condition

Reference Value

Diagnostic Note

Back-up Light Input Signal

Back-up light input

OFF or ON

OFF: Shift lever in any position other than R

ON: Shift lever in R

-

Body Electrical > Power Distribution Box > Data List

Tester Display

Back-up Light Input Signal

OK:

Display changes according to shift lever operation.

NG

GO TO STEP 6

OK

4.

CHECK HARNESS AND CONNECTOR (POWER SOURCE - POWER DISTRIBUTION BOX ASSEMBLY)

(a) Disconnect the 8J power distribution box assembly connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

8J-1 - Body ground

Ignition switch off

11 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

CHECK HARNESS AND CONNECTOR (REAR LIGHT ASSEMBLY - POWER DISTRIBUTION BOX ASSEMBLY)

(a) Disconnect the U9 rear light assembly RH connector.

(b) Disconnect the U10 rear light assembly LH connector.

(c) Disconnect the 8F power distribution box assembly connector.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

U9-2 (B) - 8F-38

Always

Below 1 Ω

U10-2 (B) - 8F-38

Always

Below 1 Ω

OK

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.

CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - POWER DISTRIBUTION BOX ASSEMBLY)

(a) Disconnect the I249 hybrid vehicle control ECU connector.

(b) Disconnect the 8B power distribution box assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

I249-24 (BL) - 8B-30

Always

Below 1 Ω

I249-24 (BL) - Body ground

Always

10 kΩ or higher

8B-30 - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

7.

CHECK HYBRID VEHICLE CONTROL ECU (OUTPUT VOLTAGE)

(a) Connect the I249 hybrid vehicle control ECU connector.

*a

Component with harness connected

(Power Distribution Box Assembly)

(b) Connect the 8B power distribution box assembly connector.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

8B-30 - Body ground

Ignition switch ON, reverse (R) not selected

Below 1 V

8B-30 - Body ground

Ignition switch ON, reverse (R) selected

11 to 14 V

OK

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

NG

REPLACE HYBRID VEHICLE CONTROL ECU

8.

CHECK REAR LIGHT ASSEMBLY LH

(a) Disconnect the U1 rear light assembly LH connector.

(b) Turn the ignition switch to ON.

(c) Move the shift lever to R.

(d) Read the Data List according to the display on the GTS.

Body Electrical > Power Distribution Box > Data List

Tester Display

Measurement Item

Normal Condition

Reference Value

Diagnostic Note

Back-up Light Fuse Shut Off Status

Back-up light fuse shut off status

OFF or ON

OFF: Fuse has no shut off history

ON: Fuse has shut off history

-

Body Electrical > Power Distribution Box > Data List

Tester Display

Back-up Light Fuse Shut Off Status

OK:

The Data List value displays "OFF".

OK

REPLACE REAR LIGHT ASSEMBLY LH

NG

9.

CHECK REAR LIGHT ASSEMBLY RH

(a) Disconnect the U9 rear light assembly RH connector.

(b) Turn the ignition switch to ON.

(c) Move the shift lever to R.

(d) Read the Data List according to the display on the GTS.

Body Electrical > Power Distribution Box > Data List

Tester Display

Measurement Item

Normal Condition

Reference Value

Diagnostic Note

Back-up Light Fuse Shut Off Status

Back-up light fuse shut off status

OFF or ON

OFF: Fuse has no shut off history

ON: Fuse has shut off history

-

Body Electrical > Power Distribution Box > Data List

Tester Display

Back-up Light Fuse Shut Off Status

OK:

The Data List value displays "OFF".

OK

REPLACE REAR LIGHT ASSEMBLY RH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.

READ VALUE USING GTS

(a) Turn the ignition switch to ON.

(b) Move the shift lever to R.

(c) Read the Data List according to the display on the GTS.

Body Electrical > Power Distribution Box > Data List

Tester Display

Measurement Item

Normal Condition

Reference Value

Diagnostic Note

Back-up Light Fuse Shut Off Status

Back-up light fuse shut off status

OFF or ON

OFF: Fuse has no shut off history

ON: Fuse has shut off history

-

Body Electrical > Power Distribution Box > Data List

Tester Display

Back-up Light Fuse Shut Off Status

OK:

The Data List value displays "OFF".

NG

GO TO STEP 15

OK

11.

READ VALUE USING GTS

(a) Read the Data List according to the display on the GTS.

Body Electrical > Power Distribution Box > Data List

Tester Display

Measurement Item

Normal Condition

Reference Value

Diagnostic Note

Back-up Light Input Signal

Back-up light input

OFF or ON

OFF: Shift lever in any position other than R

ON: Shift lever in R

-

Body Electrical > Power Distribution Box > Data List

Tester Display

Back-up Light Input Signal

OK:

Display changes according to shift lever operation.

NG

GO TO STEP 14

OK

12.

CHECK HARNESS AND CONNECTOR (REAR LIGHT ASSEMBLY RH - POWER DISTRIBUTION BOX ASSEMBLY)

(a) Disconnect the U9 rear light assembly RH connector.

(b) Disconnect the 8F power distribution box assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

U9-2 (B) - 8F-38

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

13.

CHECK PARK/NEUTRAL POSITION SWITCH ASSEMBLY (OUTPUT VOLTAGE)

(a) Disconnect the 8E power distribution box assembly connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

8E-9 - Body ground

Ignition switch ON, shift lever not in R

Below 1 V

8E-9 - Body ground

Ignition switch ON, shift lever in R

11 to 14 V

OK

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

NG

CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)

14.

CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)

(a) Disconnect the C62 park/neutral position switch assembly connector.

(b) Disconnect the 8E power distribution box assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

C62-1 (RL) - 8E-9

Always

Below 1 Ω

C62-1 (RL) - Body ground

Always

10 kΩ or higher

8E-9 - Body ground

Always

10 kΩ or higher

OK

REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY

for 2WD: Click here

for AWD: Click here

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

15.

CHECK REAR LIGHT ASSEMBLY RH

(a) Disconnect the U9 rear light assembly RH connector.

(b) Turn the ignition switch to ON.

(c) Move the shift lever to R.

(d) Read the Data List according to the display on the GTS.

Body Electrical > Power Distribution Box > Data List

Tester Display

Measurement Item

Normal Condition

Reference Value

Diagnostic Note

Back-up Light Fuse Shut Off Status

Back-up light fuse shut off status

OFF or ON

OFF: Fuse has no shut off history

ON: Fuse has shut off history

-

Body Electrical > Power Distribution Box > Data List

Tester Display

Back-up Light Fuse Shut Off Status

OK:

The Data List value displays "OFF".

OK

REPLACE BACK-UP LIGHT RH

NG

16.

CHECK HARNESS AND CONNECTOR (REAR LIGHT ASSEMBLY - POWER DISTRIBUTION BOX ASSEMBLY)

(a) Disconnect the 8F power distribution box assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

U10-2 (B) - Body ground

Always

10 kΩ or higher

8F-38 - Body ground

Always

10 kΩ or higher

OK

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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