DESCRIPTION
The main body ECU (driver side junction block assembly) controls the high beam headlights.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
1. |
CHECK HEADLIGHT |
(a) Check the operation of low beam headlights.
OK:
Low beam headlights operate normally.
NG | ![]() |
GO TO PROBLEM SYMPTOMS TABLE |
|
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) Check that the relay operates.
Main Body
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
---|---|---|---|
Head Light (HI) |
High beam headlight relay |
ON/OFF |
- |
OK:
Relay operates. (High beam headlights illuminate.)
OK | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
3. |
CHECK HARNESS AND CONNECTOR (SHORT IN RELAY-DRIVEN CIRCUIT) |
HINT:
When a short circuit occurs between the power distributor (engine room junction block assembly) and high beam headlight bulb, a fail-safe function operates to stop the H-LP HI relay operation.
(a) Remove the H-LP HI (RH) fuse from the power distributor (engine room junction block assembly). |
|
(b) Turn the light control switch to the head position and turn the dimmer switch to the high position.
(c) Check if the high beam headlight LH illuminates.
(d) Turn the dimmer switch to the low position.
(e) Install the H-LP HI (RH) fuse and remove the H-LP HI (LH) fuse.
(f) Turn the dimmer switch to the high position.
(g) Check if the high beam headlight RH illuminates.
OK:
Either high beam headlight LH or RH illuminates.
Text in Illustration
*1 |
Power Distributor (Engine Room Junction Block Assembly) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR (FUSE - BODY GROUND) |
|
4. |
INSPECT POWER DISTRIBUTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY) |
(a) Remove the power distributor (engine room junction block assembly) from the engine room relay block. |
|
(b) Connect a positive (+) lead from the battery to terminal 1A-1.
(c) Connect a negative (-) lead from the battery to terminal 1F-15.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
1D-3 - Battery negative |
Always |
11 to 14 V |
1D-4 - Battery negative |
Always |
11 to 14 V |
*1 |
Component without harness connected (Power Distributor (Engine Room Junction Block Assembly)) |
NG | ![]() |
REPLACE POWER DISTRIBUTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY) |
|
5. |
CHECK HARNESS AND CONNECTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY - MAIN BODY ECU) |
(a) Disconnect the 1F power distributor (engine room junction block assembly) connector. |
|
(b) Disconnect the 2C main body ECU (driver side junction block assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
1F-15 - 2C-23 |
Always |
Below 1 Ω |
2C-23 - Body ground |
Always |
10 kΩ or higher |
*1 |
Front view of wire harness connector (to Power Distributor (Engine Room Junction Block Assembly)) |
*2 |
Front view of wire harness connector (to Main Body ECU (Driver Side Junction Block Assembly)) |
OK | ![]() |
REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR (FUSE - BODY GROUND) |
Dtc Check / Clear
DTC CHECK / CLEAR
1. CHECK DTC
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Cruise Control / DTC.
(e) Check the details of the DTC(s) (See page
).
2 ...
Mass or Volume Air Flow Circuit Low Input (P0102,P0103)
DESCRIPTION
The mass air flow meter is a sensor that measures the amount of air flowing through
the throttle valve. The ECM uses this information to determine the fuel injection
time and to provide the appropriate air-fuel ratio.
Inside the mass air flow ...
Operation Check
OPERATION CHECK
1. CHECK BASIC OPERATION
(a) Conditions necessary for the power back door to open:
The power back door main switch is off (switch is not pressed).
The back door is unlocked (except wireless operation).
The vehicle speed is 3 k ...