RM35X0E _51 Engine / Hybrid System _078720 7GR-FKS ENGINE CONTROL _0381907 SFI SYSTEM C

7GR-FKS ENGINE CONTROL  SFI SYSTEM  P05042B  Brake Switch "A"/"B" Signal Cross Coupled  


DESCRIPTION

The stop light switch assembly is a duplex system that transmits two signals: STP and ST1-. These two signals are used by the ECM to monitor whether or not the brake system is working properly. If the signals, which indicate the brake pedal is being depressed and released, are detected simultaneously, the ECM interprets this as a malfunction in the stop light switch assembly and stores this DTC.

HINT:

The normal signal conditions are as shown in the table below.

Signal (ECM Terminal) Brake Pedal Released In Transition Brake Pedal Depressed
STP OFF ON ON
ST1- ON ON OFF

·

[OFF] denotes ground potential.

·

[ON] denotes battery potential (+B).


On the GTS, Data List item Stop Light SW is ON when the brake pedal is depressed.


DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P05042B Brake Switch "A"/"B" Signal Cross Coupled Conditions (a) and (b) are met for 0.5 seconds or more (1 trip detection logic):
(a) Ignition switch ON
(b) STP signal OFF when ST1- signal OFF
·

Open or short in stop light switch signal circuit

·

Stop light switch assembly

·

ECM


Does not come on DTC stored SAE Code: P0504

WIRING DIAGRAM

A446198E01
0.51,3.969 1.583,4.167 1.073,0.198 10 false Battery 1.771,3.063 3.521,3.323 1.75,0.26 10 false Ignition Switch Assembly*2 4.354,2.281 5.49,2.635 1.135,0.354 10 false Stop Light Switch Assembly 4.354,1.917 5.49,2.271 1.135,0.354 10 false M1*3 1.833,1.729 2.969,2.083 1.135,0.354 10 false IG2 MAIN 1.24,2.052 3.229,2.427 1.99,0.375 10 false No. 1 Integration Relay 3.531,0.771 4.667,1.125 1.135,0.354 10 false STOP 0.927,1.51 2,1.708 1.073,0.198 10 false 1E 2.75,1.51 3.823,1.708 1.073,0.198 10 false 1D 0.958,1.333 1.177,1.51 0.219,0.177 10 false 4 2.802,0.906 3.146,1.073 0.344,0.167 10 false 1 2.802,1.344 3.375,1.573 0.573,0.229 10 false 2 4.458,1.083 5.531,1.281 1.073,0.198 10 false B 4.458,0.615 5.531,0.813 1.073,0.198 10 false B 5.125,0.625 6.198,0.823 1.073,0.198 10 false L 5.135,1.417 6.208,1.615 1.073,0.198 10 false L 5.333,1.146 6.406,1.344 1.073,0.198 10 false 3*3 5.323,0.333 6.396,0.531 1.073,0.198 10 false 1*3 4.156,0.323 5.229,0.521 1.073,0.198 10 false 2*3 4.156,0.792 5.229,0.99 1.073,0.198 10 false 4*3 5.688,0.51 6.76,0.708 1.073,0.198 10 false 16 5.677,1.323 6.75,1.521 1.073,0.198 10 false 15 5.948,0.521 7.021,0.719 1.073,0.198 10 false STP 5.948,1.333 7.021,1.531 1.073,0.198 10 false ST1- 6.344,3.354 6.802,3.604 0.458,0.25 10 false ECM 6.063,3.354 6.438,3.583 0.375,0.229 10 false N1 1.198,1.24 2.333,1.594 1.135,0.354 10 false IG2-MAIN 3.438,1.219 4.573,1.573 1.135,0.354 10 false IG2 NO. 1 1.292,2.771 1.75,2.969 0.458,0.198 10 false AM2 0.385,2.24 1.156,2.458 0.771,0.219 10 false FL MAIN 2.104,2.51 2.563,2.708 0.458,0.198 10 false AM2 2.698,2.51 3.156,2.708 0.458,0.198 10 false IG2 1.896,2.51 2.063,2.708 0.167,0.198 10 false 1 3.104,2.521 3.615,2.719 0.51,0.198 10 false 2 2.76,1.083 3.083,1.271 0.323,0.188 10 false 1D 0.948,0.917 1.292,1.083 0.344,0.167 10 false 1 0.948,1.094 1.167,1.271 0.219,0.177 10 false A 1.76,2.896 2.219,3.094 0.458,0.198 10 false N28 4.156,1.354 4.469,1.552 0.313,0.198 10 false 2*4 1.833,4.031 3.396,4.438 1.563,0.406 10 false Certification ECU (Smart Key ECU Assembly)*1 3.823,3.375 5.917,3.594 2.094,0.219 10 false *1: w/ Entry and Start System 3.813,3.708 5.906,3.927 2.094,0.219 10 false *2: w/o Entry and Start System 3.813,4.052 5.906,4.271 2.094,0.219 10 false *3: for Bulb Type 4.458,1.479 4.917,1.677 0.458,0.198 10 false GND*4 2.448,3.563 3.063,3.76 0.615,0.198 10 false IG1D 3.813,4.375 5.906,4.594 2.094,0.219 10 false *4: for LED Type 4.354,2.104 4.854,2.323 0.5,0.219 10 false M2*4 1.833,3.875 2.448,4.073 0.615,0.198 10 false N156 2.865,3.469 3.938,3.667 1.073,0.198 10 false 17 4.156,0.969 5.229,1.167 1.073,0.198 10 false 6*4 4.156,0.51 5.229,0.708 1.073,0.198 10 false 7*4 5.333,0.51 6.406,0.708 1.073,0.198 10 false 3*4 5.333,1.313 6.406,1.51 1.073,0.198 10 false 5*4

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.


HINT:
·

Stop light switch assembly conditions can be checked using the GTS.

(a)

Connect the GTS to the DLC3.

(b)

Turn the ignition switch to ON.

(c)

Turn the GTS on.

(d)

Enter the following menus: Powertrain / Engine / Data List / Stop Light SW.

(e)

Check the Data List indication when the brake pedal is depressed and released.

Brake Pedal Operation Stop Light SW
Depressed ON
Released OFF


·

Read Freeze Frame Data using the GTS. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.



PROCEDURE

1.CHECK TERMINAL VOLTAGE (POWER SOURCE OF STOP LIGHT SWITCH ASSEMBLY)
A439423C03
0.479,3.177 0.875,3.438 0.396,0.26 0.25,1.031 0.646,1.292 0.396,0.26 1.99,3.167 2.406,2.75 true 2.271,1.323 2.688,0.906 true 0.115,0.094 0.427,0.292 0.313,0.198 10 false *a 0.688,1.073 1,1.271 0.313,0.198 10 false *1 0.927,3.219 1.24,3.417 0.313,0.198 10 false *2 2.469,2.594 2.75,2.813 0.281,0.219 10 false B 0.594,3.219 0.906,3.417 0.313,0.198 10 false M1 2.719,0.76 3,0.979 0.281,0.219 10 false B 0.344,1.073 0.656,1.271 0.313,0.198 10 false M2
*1 for LED Type
*2 for Bulb Type
*a Front view of wire harness connector
(to Stop Light Switch Assembly)


a.

Disconnect the stop light switch assembly connector.


b.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:
for LED Type
Tester Connection Condition Specified Condition
M2-7 (B) - Body ground Always 11 to 14 V


for Bulb Type
Tester Connection Condition Specified Condition
M1-2 (B) - Body ground Always 11 to 14 V


Result:
Proceed to
OK
NG



OK

2.CHECK TERMINAL VOLTAGE (POWER SOURCE OF STOP LIGHT SWITCH ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - STOP LIGHT SWITCH ASSEMBLY)

2.CHECK TERMINAL VOLTAGE (POWER SOURCE OF STOP LIGHT SWITCH ASSEMBLY)
A439423C05
0.479,3.177 0.875,3.438 0.396,0.26 0.302,1.042 0.698,1.302 0.396,0.26 2,3.521 2.469,3.813 true 2.094,1.427 2.563,1.719 true 0.188,0.156 0.5,0.354 0.313,0.198 10 false *a 0.74,1.083 1.052,1.281 0.313,0.198 10 false *1 0.938,3.208 1.25,3.406 0.313,0.198 10 false *2 2.521,3.75 2.802,3.969 0.281,0.219 10 false B 0.594,3.219 0.906,3.417 0.313,0.198 10 false M1 2.635,1.646 2.917,1.865 0.281,0.219 10 false B 0.396,1.083 0.708,1.281 0.313,0.198 10 false M2
*1 for LED Type
*2 for Bulb Type
*a Front view of wire harness connector
(to Stop Light Switch Assembly)


a.

Disconnect the stop light switch assembly connector.


b.

Turn the ignition switch to ON.


c.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:
for LED Type
Tester Connection Condition Specified Condition
M2-6 (B) - Body ground Ignition switch ON 11 to 14 V

for Bulb Type
Tester Connection Condition Specified Condition
M1-4 (B) - Body ground Ignition switch ON 11 to 14 V



Result:
Result Proceed to
OK (for Bulb Type) A
OK (for LED Type) B
NG C



A

3.CHECK TERMINAL VOLTAGE (STP AND ST1- VOLTAGE)

B

5.CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - BODY GROUND)

C

REPAIR OR REPLACE HARNESS OR CONNECTOR (NO. 1 INTEGRATION RELAY - STOP LIGHT SWITCH)

3.CHECK TERMINAL VOLTAGE (STP AND ST1- VOLTAGE)
A107724C55
2.313,2.521 2.656,2.792 0.344,0.271 1.813,4.052 2.271,3.271 true 2.719,4.052 2.333,3.271 true 0.667,0.531 0.979,0.729 0.313,0.198 10 false *a 2.125,0.51 2.438,0.708 0.313,0.198 10 false *b 0.167,2.219 0.479,2.417 0.313,0.198 10 false *c 2.406,2.594 2.719,2.792 0.313,0.198 10 false N1 1.656,4.083 2.219,4.26 0.563,0.177 10 false STP 2.646,4.073 3.271,4.25 0.625,0.177 10 false ST1-
*a Brake Pedal Depressed
*b Brake Pedal Released
*c Component with harness connected
(ECM)


a.

Disconnect the ECM connector.


b.

Turn the ignition switch to ON.


c.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:
Tester Connection Brake Pedal Operation Specified Condition
N1-15 (ST1-) - Body ground Released 7.5 to 14 V
Depressed Below 1.5 V
N1-16 (STP) - Body ground Released Below 1.5 V
Depressed 7.5 to 14 V



Result:
Proceed to
OK
NG



OK

REPLACE ECM

Click hereEngine / Hybrid System>7GR-FKS (ENGINE CONTROL)>ECM>REMOVAL


NG

4.CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - ECM)
4.CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - ECM)
a.

Disconnect the stop light switch assembly connector.


b.

Disconnect the ECM connector.


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
for LED Type
Tester Connection Condition Specified Condition
M2-5 (L) - N1-15 (ST1-) Always Below 1 Ω
M2-3 (L) - N1-16 (STP) Always Below 1 Ω
M2-5 (L) or N1-15 (ST1-) - Body ground and other terminals Always 10 kΩ or higher
M2-3 (L) or N1-16 (STP) - Body ground and other terminals Always 10 kΩ or higher


for Bulb Type
Tester Connection Condition Specified Condition
M1-3 (L) - N1-15 (ST1-) Always Below 1 Ω
M1-1 (L) - N1-16 (STP) Always Below 1 Ω
M1-3 (L) or N1-15 (ST1-) - Body ground and other terminals Always 10 kΩ or higher
M1-1 (L) or N1-16 (STP) - Body ground and other terminals Always 10 kΩ or higher


Result:
Proceed to
OK
NG



OK

REPLACE STOP LIGHT SWITCH ASSEMBLY

Click hereVehicle Exterior>LIGHTING (EXT)>STOP LIGHT SWITCH>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - BODY GROUND)
a.

Disconnect the stop light switch assembly connector.


b.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
M2-2 (GND) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

3.CHECK TERMINAL VOLTAGE (STP AND ST1- VOLTAGE)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR