Toyota CH-R Service Manual: Daytime Running Light Relay Circuit
DESCRIPTION
The main body ECU (multiplex network body ECU) controls the daytime running lights.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
- Before replacing the main body ECU (multiplex network body ECU), refer
to Registration.*1
Click here
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- *1: w/ Smart Key System
PROCEDURE
|
1. |
CHECK OPERATION (CLEARANCE LIGHTS) |
(a) Check the operation of the clearance lights.
OK:
The clearance lights operate normally.
| NG | .gif) |
GO TO PROBLEM SYMPTOMS TABLE
|
|
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|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Active Test.
(e) Perform the Active Test according to the display on the Techstream.
Body Electrical > Main Body > Active Test|
Tester Display |
Measurement Item |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Daytime Running Light |
Daytime running lights |
ON or OFF |
- |
|
Tester Display |
|---|
|
Daytime Running Light |
OK:
The daytime running lights illuminate.
| OK | |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
|
|
|
3. |
INSPECT NO. 1 INTEGRATION RELAY (P-CON RELAY) |
(a) Remove the No. 1 integration relay from the No. 1 engine room relay block.
Click here
(b) Inspect the No. 1 integration relay.
Click here
OK:
No. 1 integration relay is normal.
| NG | |
REPLACE NO. 1 INTEGRATION RELAY |
|
|
4. |
CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY (P-CON RELAY) - BATTERY) |
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
1B-9 - Body ground |
Always |
11 to 14 V |
|
1B-11 - Body ground |
Always |
11 to 14 V |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - HEADLIGHT ASSEMBLY LH AND HEADLIGHT ASSEMBLY RH) |
(a) Disconnect the A11 headlight assembly LH connector.
(b) Disconnect the A29 headlight assembly RH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
1B-10 - A11-2 (B) |
Always |
Below 1 Ω |
|
1B-10 - A29-2 (B) |
Always |
Below 1 Ω |
|
1B-10 - Body ground |
Always |
10 kΩ or higher |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
6. |
CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) |
(a) Disconnect the 3F instrument panel junction block assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
1B-12 - 3F-28 |
Always |
Below 1 Ω |
|
1B-12 - Body ground |
Always |
10 kΩ or higher |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
7. |
INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
(a) Remove the instrument panel junction block assembly.
Click here
(b) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
(c) Measure the resistance according to the value(s) in the table below.
|
*a |
Component without harness connected (Instrument Panel Junction Block Assembly) |
- |
- |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
3F-28 - MB-25 (DRLE) |
Always |
Below 1 Ω |
| OK | |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
| NG | |
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
|
Headlight Dimmer Switch Circuit
DESCRIPTION
The main body ECU (multiplex network body ECU) receives the following switch
information:
Light control switch in tail, head or AUTO position
Dimmer switch in high, low or h ...
Clearance Light/Daytime Running Light Circuit
DESCRIPTION
Clearance light function:
When the main body ECU (multiplex network body ECU) receives the light
control switch position signal, it sends an illumination request signal
t ...
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ILLUSTRATION
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*2
TRANSMITTER HOUSING COVER
*3
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DESCRIPTION
The yaw rate and acceleration sensor is built into the airbag sensor assembly.
The skid control ECU receives signals from the yaw rate and acceleration sensor
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Toyota CH-R Owners Manual
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Toyota CH-R Service Manual
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