Starter System Circuit Troubleshooting
Starter System Circuit Troubleshooting
NOTE:
Air temperature must be between 59?100 °F (15?38 °C) during this procedure.
The battery must be in good condition and fully charged.
1.
Keyless access system check:

Keyless access system check
?1.
Press the engine start/stop button to select the ON mode.

Is the vehicle in ON mode?

     
YES
     
     
     
Go to step 2.
     
NO
     
     
     
2.
Starting system check:

Starting system check
?1.
With the shift lever in neutral, and with the clutch pedal pressed, press the engine start/stop button to select the START mode.

Did the starter crank the engine?

     
YES
     
     
     
The system is OK at this time.?
     
NO
     
     
     
Go to step 3.
3.
Electrical connection check (at battery):

Electrical connection check (at battery)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Check electrical connections at the battery.

Is the connection OK?

     
YES
     
     
     
Go to step 4.
     
NO
     
     
     
Repair the electrical connection(s) at the battery.?
4.
Open wire check (+B BATTERY line):

Open wire check (+B BATTERY line)
?1.
Measure the voltage between test points 1 and 2.
Test condition
OFF mode
Test circuit
+B BATTERY
Test point 1
Starter B terminal (BLK)
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
Go to step 5.
     
NO
     
     
     
Repair an open in the +B BATTERY wire between the starter B terminal and the body ground.?
5.
DLC circuit check:

DLC circuit check
?1.
Connect the HDS to the DLC.

?2.
Make sure the HDS communicates with the vehicle and the PCM.

Does the HDS communicate with the vehicle?

     
YES
     
     
     
Go to step 6.
     
NO
     
     
     
6.
PGM-FI and Keyless Access Control system DTC check:

PGM-FI and Keyless Access Control system DTC check
?1.
Press the engine start/stop button to select the ON mode.

?2.
Check for PGM-FI and Keyless Access Control system DTCs with the HDS. If you fail to enter the SYSTEM SELECTION MENU with the HDS, go to the keyless access system symptom troubleshooting "Cannot select ON mode with keyless access and with the keyless remote touched the engine start/stop switch".
PGM-FI system
DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
       

Keyless Access Control system
DTC Description
DTC
Freeze Frame
     

Are any DTCs indicated?

     
YES
     
     
     
Go to the indicated DTC's troubleshooting.?
     
NO
     
     
     
Go to step 7.
7.
CLUTCH SWITCH signal check:

CLUTCH SWITCH signal check
?1.
Press the engine start/stop button to select the ON mode.

?2.
When repeatedly pressing and releasing the clutch pedal, check the parameter(s) below with the HDS.
Keyless Access Control system
Signal
Current conditions
Values
Unit
CLUTCH SWITCH
    

Is ON or OFF changed when you are operating the clutch pedal?

     
YES
     
     
     
Go to step 8.
     
NO
     
     
     
Go to step 10.
8.
CLUTCH PEDAL POSITION SWITCH A signal check:

CLUTCH PEDAL POSITION SWITCH A signal check
?1.
When pressing and releasing the clutch pedal, check the parameter(s) below with the HDS.
PGM-FI system
Signal
Current conditions
Values
Unit
CLUTCH PEDAL POSITION SWITCH A
    

Is ON or OFF changed when you are operating the clutch pedal?

     
YES
     
     
     
Go to step 13.
     
NO
     
     
     
Go to step 9.
9.
Open wire check (CLUTCH SW(SA) line):

Open wire check (CLUTCH SW(SA) line)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Jump the SCS line with the HDS.
NOTE: This step must be done to protect the PCM from damage.


?3.
Disconnect the following connector.
Clutch pedal position switch A 2P connector
PCM connector A (51P)

?4.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
Clutch pedal position switch A 2P connector: disconnected
PCM connector A (51P): disconnected
Test circuit
CLUTCH SW(SA)
Test point 1
Clutch pedal position switch A 2P connector No. 2 (BRN)
Test point 2
PCM connector A (51P) No. 49 (BRN)


Is there continuity?

     
YES
     
     
     
Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the PCM was substituted, and the symptom/indication goes away, replace the original PCM.?
     
NO
     
     
     
Repair an open in the CLUTCH SW(SA) wire between clutch pedal position switch A and the PCM.?
10.
Open wire check (CLUTCH SW(SA) line):

Open wire check (CLUTCH SW(SA) line)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connector.
Clutch pedal position switch A 2P connector
Keyless access control unit connector B (28P)

?3.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
Clutch pedal position switch A 2P connector: disconnected
Keyless access control unit connector B (28P): disconnected
Test circuit
CLUTCH SW(SA)
Test point 1
Clutch pedal position switch A 2P connector No. 2 (BRN)
Test point 2
Keyless access control unit connector B (28P) No. 5 (BRN)


Is there continuity?

     
YES
     
     
     
Go to step 11.
     
NO
     
     
     
Repair an open in the CLUTCH SW(SA) wire between clutch pedal position switch A and the keyless access control unit.?
11.
Clutch pedal position switch A test:

Clutch pedal position switch A test
?1.
Do the clutch pedal position switch A test.

Is clutch pedal position switch A OK?

     
YES
     
     
     
Go to step 12.
     
NO
     
     
     
12.
Open wire check (GND line):

Open wire check (GND line)
?1.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
Clutch pedal position switch A 2P connector: disconnected
Test circuit
GND
Test point 1
Clutch pedal position switch A 2P connector No. 1 (BLK)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
The keyless access control unit internal CLUTCH SW (SA) circuit is open. Replace the keyless access control unit.?
     
NO
     
     
     
Repair an open in the GND wire between clutch pedal position switch A and body ground (G401).?
13.
Determine possible failure area (open in STC line, short in STC line):

Determine possible failure area (open in STC line, short in STC line)
?1.
Press the clutch pedal.

?2.
Press the engine start/stop button and hold it.

?3.
Check the parameter(s) below with the HDS.
Keyless Access Control system
Signal
Current conditions
Values
Unit
STRQ
    

Is there battery voltage indicated?

     
YES
     
     
     
Go to step 14.
     
NO
     
     
     
Go to step 17.
14.
STARTER SWITCH signal check:

STARTER SWITCH signal check
?1.
Press the clutch pedal.

?2.
Press the engine start/stop button and hold it.

?3.
Check the parameter(s) below with the HDS.
PGM-FI system
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
STARTER SWITCH
ON
      

Do the current condition(s) match the threshold?

     
YES
     
     
     
Go to step 19.
     
NO
     
     
     
Go to step 15.
15.
Open wire check (PCM internal STC circuit):

Open wire check (PCM internal STC circuit)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Jump the SCS line with the HDS.
NOTE: This step must be done to protect the PCM from damage.


?3.
Disconnect the following connector.

?4.
Press the engine start/stop button to select the ON mode.

?5.
Press the clutch pedal.

?6.
Press the engine start/stop button and hold it.

?7.
Measure the voltage between test points 1 and 2.
Test condition
START mode, press clutch pedal
PCM connector A (51P): disconnected
Test circuit
STC
Test point 1
PCM connector A (51P) No. 51 (LT BLU)
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the PCM was substituted, and the symptom/indication goes away, replace the original PCM.?
     
NO
     
     
     
Go to step 16.
16.
Open wire check (STC line):

Open wire check (STC line)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connector.

?3.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
PCM connector A (51P): disconnected
Keyless access control unit connector C (24P): disconnected
Test circuit
STC
Test point 1
Keyless access control unit connector C (24P) No. 18 (LT BLU)
Test point 2
PCM connector A (51P) No. 51 (LT BLU)


Is there continuity?

     
YES
     
     
     
The keyless access control unit internal STC circuit is open. Replace the keyless access control unit.?
     
NO
     
     
     
Repair an open in the STC wire between the keyless access control unit and the PCM.?
17.
Shorted wire check (PCM internal STC circuit):

Shorted wire check (PCM internal STC circuit)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Jump the SCS line with the HDS.
NOTE: This step must be done to protect the PCM from damage.


?3.
Disconnect the following connector.

?4.
Press the engine start/stop button to select the ON mode.

?5.
Press the clutch pedal.

?6.
Press the engine start/stop button and hold it.

?7.
Check the parameter(s) below with the HDS.
Keyless Access Control system
Signal
Current conditions
Values
Unit
STRQ
    

Is there battery voltage?

     
YES
     
     
     
Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the PCM was substituted, and the symptom/indication goes away, replace the original PCM.?
     
NO
     
     
     
Go to step 18.
18.
Shorted wire check (STC line):

Shorted wire check (STC line)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connector.

?3.
Measure the resistance between test points 1 and 2.
Test condition
OFF mode
PCM connector A (51P): disconnected
Keyless access control unit connector C (24P): disconnected
Test circuit
STC
Test point 1
PCM connector A (51P) No. 51 (LT BLU)
Test point 2
Body ground


Is there 1.0 M? or more?

     
YES
     
     
     
The keyless access control unit internal STC circuit is shorted. Replace the keyless access control unit.?
     
NO
     
     
     
Repair a short in the STC wire between the keyless access control unit and the PCM.?
19.
STARTER RELAY CONTROL RETURN signal check:

STARTER RELAY CONTROL RETURN signal check
?1.
Move the shift lever to neutral.

?2.
Check the parameter(s) below with the HDS.
PGM-FI system
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
STARTER RELAY CONTROL RETURN
OFF
      

Do the current condition(s) match the threshold?

     
YES
     
     
     
Go to step 22.
     
NO
     
     
     
Go to step 20.
20.
Starter cut relay 1 check:

Starter cut relay 1 check
?1.
Test the relay circuit board.

Is the relay OK?

     
YES
     
     
     
Go to step 21.
     
NO
     
     
     
Replace the relay circuit board.?
21.
Open wire check (ST CUT RLY1 CL- line):

Open wire check (ST CUT RLY1 CL- line)
?1.
Install the relay circuit board.

?2.
Jump the SCS line with the HDS.
NOTE: This step must be done to protect the PCM from damage.


?3.
Disconnect the following connector.

?4.
Move the shift lever to neutral.

?5.
Press the engine start/stop button to select the ON mode.

?6.
Press the clutch pedal.

?7.
Press the engine start/stop button and hold it.

?8.
Measure the voltage between test points 1 and 2.
Test condition
START mode, press clutch pedal
PCM connector A (51P): disconnected
Test circuit
ST CUT RLY1 CL-
Test point 1
PCM connector A (51P) No. 33 (GRN)
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the PCM was substituted, and the symptom/indication goes away, replace the original PCM.?
     
NO
     
     
     
Repair an open in the ST CUT RLY1 CL- wire between the relay circuit board and the PCM.?
22.
STARTER CUT CTRL RETURN signal check:

STARTER CUT CTRL RETURN signal check
?1.
Move the shift lever to neutral.

?2.
Check the parameter(s) below with the HDS.
PGM-FI system
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
STARTER CUT CTRL RETURN
OFF
      

Do the current condition(s) match the threshold?

     
YES
     
     
     
Go to step 25.
     
NO
     
     
     
Go to step 23.
23.
Starter cut relay 2 check:

Starter cut relay 2 check
?1.
Test the relay circuit board.

Is the relay OK?

     
YES
     
     
     
Go to step 24.
     
NO
     
     
     
Replace the relay circuit board.?
24.
Open wire check (ST CUT RLY2 CL- line):

Open wire check (ST CUT RLY2 CL- line)
?1.
Install the relay circuit board.

?2.
Jump the SCS line with the HDS.
NOTE: This step must be done to protect the PCM from damage.


?3.
Disconnect the following connector.

?4.
Move the shift lever to neutral.

?5.
Press the engine start/stop button to select the ON mode.

?6.
Press the clutch pedal.

?7.
Press the engine start/stop button and hold it.

?8.
Measure the voltage between test points 1 and 2.
Test condition
START mode, press clutch pedal
PCM connector A (51P): disconnected
Test circuit
ST CUT RLY2 CL-
Test point 1
PCM connector A (51P) No. 34 (BRN)
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the PCM was substituted, and the symptom/indication goes away, replace the original PCM.?
     
NO
     
     
     
Repair an open in the ST CUT RLY2 CL- wire between the relay circuit board and the PCM.?
25.
STARTER CUT RELAY signal check:

STARTER CUT RELAY signal check
?1.
Press the clutch pedal.

?2.
Press the engine start/stop button and hold it.

?3.
Check the parameter(s) below with the HDS.
PGM-FI system
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
STARTER CUT RELAY
More than 2.2
V
    

Do the current condition(s) match the threshold?

     
YES
     
     
     
Go to step 27.
     
NO
     
     
     
Go to step 26.
26.
Starter cut relay 1 check:

Starter cut relay 1 check
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Test the relay circuit board.

Is the relay OK?

     
YES
     
     
     
Check the No. A12-10 (ST MG) (30 A) fuse. If the fuse is OK, replace the under-hood fuse/relay box.?
     
NO
     
     
     
Replace the relay circuit board.?
27.
Starter cut relay 2 check:

Starter cut relay 2 check
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Test the relay circuit board.

Is the relay OK?

     
YES
     
     
     
Go to step 28.
     
NO
     
     
     
Replace the relay circuit board.?
28.
Determine possible failure area (starter, others):

Determine possible failure area (starter, others)
?1.
Install the relay circuit board.

?2.
Disconnect the following connector.

?3.
Press the clutch pedal.

?4.
Press the engine start/stop button and hold it.

?5.
Measure the voltage between test points 1 and 2.
Test condition
START mode, press clutch pedal
Starter S terminal 1P connector: disconnected
Test circuit
ST MG SW
Test point 1
Starter S terminal 1P connector No. 1 (BLK/WHT)
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
     
NO
     
     
     
Repair an open in the ST MG SW wire between the relay circuit board and the starter.?