DESCRIPTION
w/o Entry and Start System
While the engine is being cranked, current flows from terminal ST2 of the ignition switch to the clutch start switch and also flows to terminal STA of the ECM (STA Signal).
WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
When replacing the ECM, the ECM needs Registration and Initialization Click here.
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
Tech Tips
When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the intelligent tester. Then after installing the new ECM, perform all of the initialization/registrations for the "Learning Values Write" function by following the instructions shown on the tester display.
PROCEDURE
CHECK WHETHER ENGINE CAN BE CRANKED
Check if the engine can be cranked.
Result | Proceed to |
---|---|
Engine cannot be cranked | A |
Engine can be cranked | B |
B |
READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL) Click here |
A |
INSPECT STARTER RELAY ASSEMBLY
Inspect the starter relay assembly Click here.
NG |
REPLACE STARTER RELAY ASSEMBLY |
OK |
READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL)
Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the tester on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Starter Signal.
Check the value displayed on the tester when the ignition switch is turned to the ON and START positions.
OK | ||||||
---|---|---|---|---|---|---|
|
NG |
READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL) Click here |
OK |
CHECK HARNESS AND CONNECTOR (STARTER RELAY HOLDER TERMINAL VOLTAGE)
*1 | Engine Room Relay Block |
*2 | Starter Relay Holder |
Remove the starter relay assembly from the engine room relay block.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Result | Proceed to |
---|---|
Normal | A |
Abnormal (Starter relay holder terminal 2) | B |
Abnormal (Starter relay holder terminal 5) | C |
B |
REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - STARTER RELAY HOLDER) |
C |
REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - STARTER RELAY HOLDER) |
A |
CHECK HARNESS AND CONNECTOR (STARTER RELAY ASSEMBLY HOLDER - BODY GROUND)
Remove the starter relay assembly from the engine room relay block.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK HARNESS AND CONNECTOR (STARTER ASSEMBLY - STARTER RELAY ASSEMBLY HOLDER)
Remove the starter relay assembly from the engine room relay block.
Disconnect the starter assembly connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
OK |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL)
Disconnect the power management control ECU connector.
Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the tester on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Starter Signal.
Check the value displayed on the tester when the ignition switch is turned to the ON and START positions.
OK | ||||||
---|---|---|---|---|---|---|
|
OK |
REPLACE POWER MANAGEMENT CONTROL ECU Click here |
NG |
CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH TERMINAL VOLTAGE)
*a | Front view of wire harness connector (to Clutch Start Switch Assembly) |
Disconnect the clutch start switch connector.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
NG |
CHECK HARNESS AND CONNECTOR (IGNITION SWITCH TERMINAL VOLTAGE) Click here |
OK |
INSPECT CLUTCH START SWITCH ASSEMBLY
Inspect the clutch start switch assembly Click here.
OK |
REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - CLUTCH START SWITCH ASSEMBLY - POWER MANAGEMENT CONTROL ECU - STARTER RELAY ASSEMBLY) |
NG |
REPLACE CLUTCH START SWITCH ASSEMBLY |
CHECK HARNESS AND CONNECTOR (IGNITION SWITCH TERMINAL VOLTAGE)
*a | Front view of wire harness connector (to Ignition Switch Assembly) |
Disconnect the ignition switch assembly connector.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - IGNITION SWITCH ASSEMBLY) |
OK |
INSPECT IGNITION SWITCH ASSEMBLY
Inspect the ignition switch assembly Click here.
OK |
REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION SWITCH ASSEMBLY - CLUTCH START SWITCH ASSEMBLY) |
NG |
REPLACE IGNITION SWITCH ASSEMBLY Click here |
READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL)
Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the tester on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Starter Signal.
Check the value displayed on the tester when the ignition switch is turned to the ON and START positions.
OK | ||||||
---|---|---|---|---|---|---|
|
OK |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here |
NG |
CHECK HARNESS AND CONNECTOR (ECM - STARTER RELAY ASSEMBLY HOLDER)
Disconnect the ECM connector.
Disconnect the power management control ECU connector.
Disconnect the clutch start switch connector.
Remove the starter relay assembly from the engine room relay block.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
OK |
REPLACE ECM Click here |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |