DESCRIPTION
The main body ECU (multiplex network body ECU) controls the low beam headlights.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
PERFORM ACTIVE TEST USING TECHSTREAM (HEADLIGHT RELAY) |
(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.
Main Body
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
---|---|---|---|
Headlight Relay |
Headlight relays |
ON/OFF |
- |
OK:
Headlight relays operate. (Low beam headlights illuminate.)
OK | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
2. |
INSPECT H-LP LO RELAY |
(a) Remove the H-LP LO relay from the engine room relay block. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
3 - 5 |
Voltage is not applied between terminals 1 and 2 |
10 kΩ or higher |
3 - 5 |
Voltage is applied between terminals 1 and 2 |
Below 1 Ω |
NG | ![]() |
REPLACE H-LP LO RELAY |
|
3. |
CHECK HARNESS AND CONNECTOR (BATTERY - H-LP LO RELAY) |
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
Relay terminal 2 - Body ground |
Always |
11 to 14 V |
Relay terminal 5 - Body ground |
Always |
11 to 14 V |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. |
CHECK HARNESS AND CONNECTOR (H-LP LO RELAY - DRIVER SIDE JUNCTION BLOCK) |
(a) Disconnect the 1F driver side junction block connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
Relay terminal 1 - 1F-28 |
Always |
Below 1 Ω |
1F-28 - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
INSPECT DRIVER SIDE JUNCTION BLOCK |
(a) Remove the driver side junction block. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
1F-28 - MB-15 (HRLY) |
Always |
Below 1 Ω |
1F-28 - Body ground |
Always |
10 kΩ or higher |
*a |
Component without harness connected (Driver Side Junction Block) |
OK | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
NG | ![]() |
REPLACE DRIVER SIDE JUNCTION BLOCK |
Glass Position Initialization Incomplete (B2313)
DESCRIPTION
The power window regulator motor assembly is operated by the power window regulator
master switch assembly or power window regulator switch assembly. The power window
regulator motor assembly has motor, regulator and ECU functions.
When the ECU determines that the power window regu ...
No Signal from Transmitter ID1 (C2121/21-C2124/24,C2181/81-C2184/84)
DESCRIPTION
The tire pressure warning valve and transmitters that are installed in the tire
and wheel assemblies measure the tire pressure of each wheel. The measured values
are transmitted to the tire pressure warning ECU and receiver in the vehicle as
radio waves. The ECU compares the measu ...
Lost Communication with Meter (B1324)
DESCRIPTION
This DTC is stored when a communication error occurs between the radio and display
receiver assembly and combination meter assembly.
DTC No.
DTC Detection Condition
Trouble Area
B1324
After the radio and display receiver as ...