DESCRIPTION
This circuit detects the ignition switch ACC or off condition, and sends it to the main body ECU (driver side junction block assembly).
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
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) Enter the following menus: Body Electrical / Main Body / Data List.
(e) Read the display on the Techstream.
Main Body
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
ACC SW |
Ignition switch or engine switch ACC signal/ON or OFF |
ON: Ignition switch ACC OFF: Ignition switch off |
- |
OK:
Normal conditions listed above are displayed.
OK | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
2. |
INSPECT ACC RELAY |
(a) Remove the ACC relay from the main body ECU (driver side junction block assembly). |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
3 - 5 |
When battery voltage is not applied to terminals 1 and 2 |
10 kΩ or higher |
When battery voltage is applied to terminals 1 and 2 |
Below 1 Ω |
NG | ![]() |
REPLACE ACC RELAY |
|
3. |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND) |
(a) Disconnect the 2A main body ECU (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 |
Always |
11 to 14 V |
*1 |
Front view of wire harness connector (to Main Body ECU (Driver Side Junction Block Assembly)) |
(c) Disconnect the 2F main body ECU (driver side junction block assembly) connector. |
|
(d) 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 Main Body ECU (Driver Side Junction Block Assembly)) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. |
CHECK VEHICLE CONDITION |
(a) Check the vehicle condition.
Condition |
Proceed to |
---|---|
w/o Smart Key System |
A |
w/ Smart Key System |
B |
B | ![]() |
GO TO STEP 7 |
|
5. |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - IGNITION SWITCH) |
(a) Disconnect the D12 ignition switch connector. |
|
(b) Disconnect the 2G 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 |
---|---|---|
2G-9 - D12-3 (ACC) |
Always |
Below 1 Ω |
2G-10 - D12-2 (AM1) |
Always |
Below 1 Ω |
2G-9 - Body ground |
Always |
10 kΩ or higher |
2G-10 - Body ground |
Always |
10 kΩ or higher |
*1 |
Front view of wire harness connector (to Main Body ECU (Driver Side Junction Block Assembly)) |
*2 |
Front view of wire harness connector (to Ignition Switch) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
6. |
INSPECT IGNITION SWITCH |
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
OK | ![]() |
REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) |
NG | ![]() |
REPLACE IGNITION SWITCH |
7. |
CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - MAIN BODY ECU) |
(a) Disconnect the 2G main body ECU (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 |
---|---|---|
2G-9 - Body ground |
Engine switch on (ACC) |
11 to 14 V |
*1 |
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 |
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Monitoring Item
Malfunction Detection Condition
Trouble Area
Detection Timing
Detection Logic
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