DESCRIPTION
In this vehicle, the ST NO. 1 relay that supplies power to the starter motor is operated by the cranking holding function of the certification ECU. When the appropriate vehicle conditions are satisfied, the brake pedal is depressed and the transaxle gear is in neutral, the engine can be cranked.
If the brake pedal is not depressed or the transaxle gear is not in neutral, the engine cannot be cranked.
During cranking, the ST NO. 1 relay operation signal (STA signal) is input into the STA terminal of the TCM, and is used to control the multi-mode manual transaxle system.
When the ignition switch is turned to ON and the brake pedal is depressed, the TCM turns on the shift lock solenoid in order to release shift lock.
When the shift lever is in N, the TCM detects that the shift lever is in N using the shift position sensor.
When the engine is started, the start signal is sent to the TCM through the neutral position switch. When the TCM receives this signal, the ST NO. 1 (starter) relay is turned on to cause the engine start.
CAUTION / NOTICE / HINT
If DTC P0703 is output, troubleshoot this code first.
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
READ VALUE USING GTS (STA SWITCH SIGNAL)
Connect an GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Multi-Mode M/T / Data List / STA Switch Signal.
In accordance with the display on the GTS, read the Data List.
Powertrain > Multi-Mode M/T > Data ListTester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
---|---|---|---|---|
STA Switch Signal | STA signal | OFF or ON | ON: Cranking | - |
OK |
---|
ON is displayed in the Data List when cranking. |
Tester Display |
---|
STA Switch Signal |
Result | |||
---|---|---|---|
|
OK |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here Нажмите здесь |
NG |
CHECK ST NO. 1 RELAY (POWER SOURCE)
Remove the ST NO. 1 relay from the engine room relay block and junction block assembly.
*1 | Engine Room Relay Block and Junction Block Assembly |
*2 | ST NO. 1 Relay (Starter Relay) |
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
Result | ||||||||
---|---|---|---|---|---|---|---|---|
|
B | Нажмите здесь |
C | Нажмите здесь |
A |
INSPECT ST NO. 1 RELAY (STARTER RELAY)
Inspect the ST NO. 1 relay.
Click hereНажмите здесь
Result | |||
---|---|---|---|
|
NG |
REPLACE ST NO. 1 RELAY (STARTER RELAY) |
OK |
CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - BODY GROUND)
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
OK |
REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - TCM) |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - TCM)
Disconnect the TCM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK TCM (TMN VOLTAGE)
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
*a |
Front view of wire harness connector (to TCM) |
Result | |||
---|---|---|---|
|
NG | Нажмите здесь |
OK |
REPLACE TCM
Replace the TCM.
for LHD: Click here Нажмите здесь
for RHD: Click here Нажмите здесь
Result | ||
---|---|---|
|
NEXT |
PERFORM INITIALIZATION
Perform the initialization and learning procedure.
Click hereНажмите здесь
Result | ||
---|---|---|
|
NEXT |
END |
CHECK HARNESS AND CONNECTOR (TCM - NEUTRAL POSITION SWITCH ASSEMBLY)
Disconnect the neutral position switch assembly connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
INSPECT NEUTRAL POSITION SWITCH
Inspect the neutral position switch.
Click hereНажмите здесь
Result | |||
---|---|---|---|
|
NG |
REPLACE NEUTRAL POSITION SWITCH Click hereНажмите здесь |
OK |
CHECK HARNESS AND CONNECTOR (NEUTRAL POSITION SWITCH - IGNITION OR STARTER SWITCH ASSEMBLY)
Disconnect the ignition or starter switch assembly connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
INSPECT IGNITION OR STARTER SWITCH ASSEMBLY
Inspect the ignition or starter switch assembly.
Click hereНажмите здесь
Result | |||
---|---|---|---|
|
OK |
REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - BATTERY) |
NG |
REPLACE IGNITION OR STARTER SWITCH ASSEMBLY Click hereНажмите здесь |
CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - NEUTRAL POSITION SWITCH)
Disconnect the neutral position switch assembly connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
INSPECT NEUTRAL POSITION SWITCH
Inspect the neutral position switch.
Click hereНажмите здесь
Result | |||
---|---|---|---|
|
NG |
REPLACE NEUTRAL POSITION SWITCH Click hereНажмите здесь |
OK |
CHECK HARNESS AND CONNECTOR (NEUTRAL POSITION SWITCH - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))
Disconnect the certification ECU (smart key ECU assembly) connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
OK |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |