DESCRIPTION
The main body ECU (driver side junction block assembly) determines the ignition switch position (OFF, ACC, ON) based on signals from the IG or ACC circuit.
WIRING DIAGRAM
PROCEDURE
1. |
READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Select the items below in the Data List and read the display on the Techstream.
Main Body
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
IG SW |
Ignition switch ON signal/ON or OFF |
ON: Ignition switch ON OFF: Ignition switch off |
- |
ACC SW |
Ignition switch ACC signal/ON or OFF |
ON: Ignition switch ACC OFF: Ignition switch off |
- |
OK:
When the ignition switch is operated, the display changes as shown in the table.
OK | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
2. |
CHECK HARNESS AND CONNECTOR (BATTERY - DRIVER SIDE JUNCTION BLOCK ASSEMBLY) |
(a) Disconnect the 2A driver side junction block assembly connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
2A-1 - Body ground |
Ignition switch ON |
11 to 14 V |
*1 |
Front view of wire harness connector (to Driver Side Junction Block Assembly) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
INSPECT IGNITION SWITCH ASSEMBLY |
(a) Remove the ignition switch assembly (See page
|
|
(b) Disconnect the D12 ignition switch assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D12-4 (IG1) - D12-2 (AM1) |
Ignition switch ON |
Below 1 Ω |
D12-3 (ACC) - D12-2 (AM1) |
Ignition switch ACC |
Below 1 Ω |
*1 |
Component without harness connected (Ignition Switch Assembly) |
*2 |
No Pin |
*3 |
LOCK |
*4 |
ACC |
*5 |
ON |
*6 |
START |
Result |
Proceed to |
---|---|
OK |
A |
NG (for 2GR-FE) |
B |
NG (for 1AR-FE) |
C |
B | ![]() |
REPLACE IGNITION SWITCH ASSEMBLY (for 2GR-FE) |
C | ![]() |
REPLACE IGNITION SWITCH ASSEMBLY (for 1AR-FE) |
|
4. |
CHECK HARNESS AND CONNECTOR (DRIVER SIDE J/B - DRIVER SIDE J/B) |
(a) Disconnect the 2G driver side junction block assembly connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
2G-10 - 2G-29 |
Ignition switch ON |
Below 1 Ω |
2G-10 - 2G-9 |
Ignition switch ACC |
Below 1 Ω |
*1 |
Front view of wire harness connector (to Driver Side Junction Block Assembly) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - BODY GROUND) |
(a) Disconnect the 2F driver side junction block assembly connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
2F-16 - Body ground |
Always |
Below 1 Ω |
*1 |
Front view of wire harness connector (to Driver Side Junction Block Assembly) |
OK | ![]() |
REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Customize Parameters
CUSTOMIZE PARAMETERS
1. CUSTOMIZING FUNCTION WITH TECHSTREAM (REFERENCE)
HINT:
The following items can be customized.
NOTICE:
When the customer requests a change in a function, first make sure that
the function can be customized.
Record th ...
System Voltage (P0560)
DESCRIPTION
The battery supplies electricity to the TCM even when the ignition switch is
off. This power allows the TCM to store data such as DTC history and freeze frame
data. If the battery voltage falls below a minimum level, these memories are cleared ...
Data List / Active Test
DATA LIST / ACTIVE TEST
1. ACTIVE TEST
HINT:
Using the Techstream to perform Active Tests allows relays, VSVs, actuators and
other items to be operated without removing any parts. This non-intrusive functional
inspection can be very useful because inter ...