СИСТЕМА ECD - Starter Signal Circuit
DESCRIPTION
When the engine is cranked, the intake air flow becomes slow so fuel vaporization is poor. A rich mixture is therefore necessary in order to achieve good startability. While the engine is being cranked, the battery voltage is applied to terminal STA of the ECM. The starter signal is mainly used to increase the fuel injection volume for starting and after-start injection control.
WIRING DIAGRAM
INSPECTION PROCEDURE
When using intelligent tester:
| 1.READ VALUE USING INTELLIGENT TESTER (STA SIGNAL) |
Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON and turn the tester on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Starter Signal.
Read the STA signal on the intelligent tester while the starter operates.
- OK:
| Ignition Switch Position | STA Signal |
| LOCK, ACC, ON | OFF |
| START | ON |
| OK | |
| |
| PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
|
|
| 2.CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH - ECM) |
Disconnect the clutch start switch connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance (Check for Open):
for LHD| Tester Connection | Condition | Specified Condition |
| A41-1 - G61-11 (STA) | Always | Below 1 Ω |
for RHD| Tester Connection | Condition | Specified Condition |
| r2-1 - G61-11 (STA) | Always | Below 1 Ω |
- Standard Resistance (Check for Short):
for LHD| Tester Connection | Condition | Specified Condition |
| A41-1 or G61-11 (STA) - Body ground | Always | 10 kΩ higher |
for RHD| Tester Connection | Condition | Specified Condition |
| r2-1 or G61-11 (STA) - Body ground | Always | 10 kΩ higher |
Reconnect the clutch start switch connector.
Reconnect the ECM connector.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
When not using intelligent tester:
| 1.CHECK ECM (STA VOLTAGE) |
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
| Tester Connection | Condition | Specified Condition |
| G61-11 (STA) - C101-14 (E1) | Cranking | 6 V or higher |
Text in Illustration| *a | Component with harness connected
(ECM) |
| OK | |
| |
| PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
|
|
| 2.CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH - ECM) |
Disconnect the clutch start switch connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance (Check for Open):
for LHD| Tester Connection | Condition | Specified Condition |
| A41-1 - G61-11 (STA) | Always | Below 1 Ω |
for RHD| Tester Connection | Condition | Specified Condition |
| r2-1 - G61-11 (STA) | Always | Below 1 Ω |
- Standard Resistance (Check for Short):
for LHD| Tester Connection | Condition | Specified Condition |
| A41-1 or G61-11 (STA) - Body ground | Always | 10 kΩ higher |
for RHD| Tester Connection | Condition | Specified Condition |
| r2-1 or G61-11 (STA) - Body ground | Always | 10 kΩ higher |
Reconnect the clutch start switch connector.
Reconnect the ECM connector.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
