DESCRIPTION
When the ignition switch is turned to ON, voltage from the ECM's MREL terminal is applied to the EFI MAIN relay. This causes the contacts of the EFI MAIN relay to close, which supplies power to terminal +B of the TCM.
WIRING DIAGRAM
PROCEDURE
1. |
CHECK HARNESS AND CONNECTOR (TCM - BODY GROUND) |
(a) Turn the ignition switch off. |
|
(b) Disconnect the TCM connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
B40-8 (E1) - Body ground |
Always |
Below 1 Ω |
*1 |
Front view of wire harness connector (to TCM) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
2. |
INSPECT ECU TERMINAL VOLTAGE (+B TERMINAL) |
(a) Disconnect the TCM connectors. |
|
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
B40-18 (+B) - Body ground |
Ignition switch ON |
11 to 14 V |
*1 |
Front view of wire harness connector (to TCM) |
OK | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
3. |
CHECK HARNESS AND CONNECTOR (TCM - ENGINE ROOM JUNCTION BLOCK ASSEMBLY) |
(a) Turn the ignition switch off.
(b) Disconnect the TCM connector.
(c) Remove the engine room junction block assembly from the engine room relay block.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):
Tester Connection |
Condition |
Specified Condition |
---|---|---|
B40-18 (+B) - 1F-18 (+B) |
Always |
Below 1 Ω |
Standard Resistance (Check for Short):
Tester Connection |
Condition |
Specified Condition |
---|---|---|
B40-18 (+B) or 1F-18 (+B) - Body ground |
Always |
10 kΩ or higher |
*1 |
Engine Room Junction Block Assembly |
*2 |
Front view of wire harness connector (to Engine Room Junction Block Assembly) |
*3 |
Front view of wire harness connector (to TCM) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. |
INSPECT ENGINE ROOM JUNCTION BLOCK ASSEMBLY |
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
OK | ![]() |
GO TO ECM POWER SOURCE CIRCUIT (ENGINE CONTROL SYSTEM / SFI SYSTEM) |
NG | ![]() |
REPLACE ENGINE ROOM JUNCTION BLOCK ASSEMBLY |
All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch
DESCRIPTION
The main body ECU (driver side junction block assembly) receives switch signals
from the door control switch and activates the door lock motor on each door according
to these signals.
WIRING DIAGRAM
PROCEDURE
1.
REA ...
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms.
If multiple suspected areas are listed, the potential causes of the symptoms
are listed in order of probability in the "Suspected Area" ...
Main Body ECU Vehicle Information Reading/Writing Process Malfunction (B15F6)
DESCRIPTION
This DTC is stored when items controlled by the main body ECU (multiplex network
body ECU) cannot be customized via the audio and visual system vehicle customization
screen.
HINT:
The main body ECU (multiplex network body ECU) controls t ...