Toyota Corolla Cross: High Beam Headlight Circuit
DESCRIPTION
The main body ECU (multiplex network body ECU) controls the high beam headlights.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Before replacing the main body ECU (multiplex network body ECU), refer to refer to Registration.*1
Click here
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- Check the operation of the low beam headlights. If the low beam headlights do not operate normally, refer to Problem Symptoms Table.
Click here
- First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CAN communication malfunctions before troubleshooting this symptom.
for HEV Model: Click here
for Gasoline Model: Click here
- *1: w/ Smart Key System
PROCEDURE
|
1. | PERFORM ACTIVE TEST USING GTS |
(a) Enter the following menus: Body Electrical / Main Body / Active Test.
(b) Perform the Active Test according to the display on the GTS.
Body Electrical > Main Body > Active Test|
Tester Display | Measurement Item |
Control Range | Diagnostic Note |
|---|---|---|---|
|
High Beam Headlight | High beam headlights |
OFF or ON | - |
|
Tester Display |
|---|
| High Beam Headlight |
OK:
High beam headlights illuminate.
| OK | .gif) | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
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| 2. |
INSPECT H-LP HI RELAY |
(a) Remove the H-LP HI relay from the No. 1 engine room relay block.
(b) Inspect the H-LP HI relay.
Click here
| NG | |
REPLACE H-LP HI RELAY |
|
| 3. |
CHECK HARNESS AND CONNECTOR (H-LP HI RELAY - BATTERY) |
| (a) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 4. |
CHECK HARNESS AND CONNECTOR (H-LP HI RELAY - HEADLIGHT ASSEMBLY LH AND HEADLIGHT ASSEMBLY RH AND BODY GROUND) |
(a) Disconnect the A131 headlight assembly LH connector.
(b) Disconnect the A134 headlight assembly RH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
Relay terminal 3 - A131-1 (SOL) |
Always | Below 1 Ω |
|
Relay terminal 3 - A134-1 (SOL) |
Always | Below 1 Ω |
|
A131-5 (E) - Body ground |
Always | Below 1 Ω |
|
A134-5 (E) - Body ground |
Always | Below 1 Ω |
|
Relay terminal 3 - Body ground |
Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 5. |
CHECK HARNESS AND CONNECTOR (H-LP HI RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) |
(a) Disconnect the I85 main body ECU (Multiplex network body ECU) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
Relay terminal 1 - I85-22 (DIM) |
Always | Below 1 Ω |
|
Relay terminal 1- Body ground |
Always | 10 kΩ or higher |
| OK | | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
Removal
REMOVAL CAUTION / NOTICE / HINT COMPONENTS (REMOVAL)
Procedure Part Name Code
1 REAR COMBINATION LIGHT ASSEMBLY
81560
- - CAUTION / NOTICE / HIN
Disassembly
DISASSEMBLY CAUTION / NOTICE / HINT COMPONENTS (DISASSEMBLY)
Procedure Part Name Code
1 REAR SIDE MARKER LIGHT SOCKET
- -
- -
2 REAR SIDE MARKER
SEE MORE:
Reassembly
REASSEMBLY CAUTION / NOTICE / HINT COMPONENTS (REASSEMBLY)
Procedure Part Name Code
1 NO. 1 RADIATOR AIR GUIDE LH
16595D -
- -
2 NO. 1 RADIATOR AIR GUIDE RH
16593D -
- -
3 FRONT BUMPER BAR REINFORCEMENT LH
52134C -
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
NOTICE:
Do not perform "Smart Code Reset" (all key ID erasure) until all malfunctions and symptoms have been confirmed and resolved. If all key ID erasure is performed without confirming or resolving malfunctions, key registration will be unable to be performed, resulti
