RM3660EC _51 Engine / Hybrid System _080777 NR Series ENGINE CONTROL _0393969 SFI SYSTEM C

NR Series ENGINE CONTROL  SFI SYSTEM  P070312  Brake Switch "B" Circuit Short to Battery  


DESCRIPTION

The stop light switch assembly is part of 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. This DTC indicates that the stop light switch assembly is remaining on. When the stop light switch assembly remains on during "STOP and GO" driving, the ECM interprets this as a fault in the stop light switch assembly. The ECM store this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P070312 Brake Switch "B" Circuit Short to Battery The stop light switch assembly remains on even when the vehicle repeats 5 times of STOP (less than 3 km/h [1.86 mph]) and GO (30 km/h [18.65 mph] or more) (2 trip detection logic).
·

Short in stop light switch assembly circuit

·

Stop light switch assembly

·

ECM


Does not come on DTC stored SAE Code:
P0724

MONITOR DESCRIPTION

This DTC indicates that the stop light switch assembly is remaining on. When the stop light switch assembly remains on during "STOP and GO" driving, the ECM interprets this as a fault in the stop light switch assembly, stores this DTC. The vehicle must STOP (less than 3 km/h [1.86 mph]) and GO (30 km/h [18.65 mph] or more) 5 times during 2 driving cycles, in order to detect a malfunction.

MONITOR STRATEGY

Required Sensors/Components (Main) Stop light switch assembly
Required Sensors/Components (Related) Speed sensor
Frequency of Operation Continuous

CONFIRMATION DRIVING PATTERN

A399800E16
1.417,2.021 1.792,2.188 0.375,0.167 10 false Idling 0.688,2.427 2.125,2.594 1.438,0.167 10 false Ignition Switch ON 2.51,2.469 2.708,2.667 0.198,0.198 10 false [A] 2.583,3.083 3.292,3.229 0.708,0.146 10 false 5 seconds 3.271,3.49 3.479,3.667 0.208,0.177 10 false [B] 3.406,1.917 3.615,2.094 0.208,0.177 10 false [C] 6.75,3.479 6.948,3.677 0.198,0.198 10 false [E] 4.042,1.5 4.25,1.677 0.208,0.177 10 false [D] 1.26,1.198 1.792,1.385 0.531,0.188 10 false 30 km/h 1.354,1.729 1.844,1.906 0.49,0.177 10 false 3 km/h 1.521,0.167 2.677,0.406 1.156,0.24 10 false Vehicle Speed 6.844,3.115 7.156,3.344 0.313,0.229 10 false Time

1.

Connect the GTS to the DLC3.

2.

Turn the ignition switch to ON.

3.

Turn the GTS on.

4.

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

5.

Turn the ignition switch off and wait for at least 30 seconds.

6.

Turn the ignition switch to ON [A].

7.

Turn the GTS on.

8.

Wait 5 seconds.

9.

Enter the following menus: Powertrain / Engine / Trouble Codes [B].

10.

Read the pending DTCs.

HINT:
·

If a pending DTC is output, the system is malfunctioning.

·

If a pending DTC is not output, perform the following procedure.



11.

Enter the following menus: Powertrain / Engine / Utility / All Readiness.

12.

Input the DTC: P070312.

13.

Check the DTC judgment result.

GTS Display Description
NORMAL
·

DTC judgment completed

·

System normal


ABNORMAL
·

DTC judgment completed

·

System abnormal


INCOMPLETE
·

DTC judgment not completed

·

Perform driving pattern after confirming DTC enabling conditions



HINT:
·

If the judgment result shows NORMAL, the system is normal.

·

If the judgment result shows ABNORMAL, the system has a malfunction.

·

If the judgment result shows INCOMPLETE, perform steps [C] through [E].



14.

Start the engine [C].

15.

Accelerate the vehicle to 30 km/h (18.65 mph) or more, depress the brake pedal and decelerate the vehicle to 3 km/h (1.86 mph) or less [D]. Repeat step [D] 5 times.

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.


16.

Enter the following menus: Powertrain / Engine / Trouble Codes [E].

17.

Read the pending DTCs.

HINT:
·

If a pending DTC is output, the system is malfunctioning.

·

If a pending DTC is not output, perform the following procedure.



18.

Enter the following menus: Powertrain / Engine / Utility / All Readiness.

19.

Input the DTC: P070312.

20.

Check the DTC judgment result.

GTS Display Description
NORMAL
·

DTC judgment completed

·

System normal


ABNORMAL
·

DTC judgment completed

·

System abnormal


INCOMPLETE
·

DTC judgment not completed

·

Perform driving pattern after confirming DTC enabling conditions



HINT:
·

If the judgment result shows NORMAL, the system is normal.

·

If the judgment result shows ABNORMAL, the system has a malfunction.

·

If the judgment result shows INCOMPLETE, perform the Confirmation Driving Pattern and check the DTC judgment result again.




CAUTION / NOTICE / HINT

NOTICE:

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


HINT:
·

Using the GTS, the Data List item "Stop Light SW" can be read.

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>SFI SYSTEM>DATA LIST / ACTIVE TEST

·

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.READ VALUE USING GTS (STOP LIGHT SW)
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.

Powertrain > Engine > Data List
Tester Display
Stop Light SW
50003 372 12

e.

Read the Data List displayed on the GTS.

OK:
GTS Display Measurement Item/Range (display) Normal Condition
Stop Light SW Stop light switch status: ON or OFF
·

ON: Brake pedal depressed

·

OFF: Brake pedal released





Result:
Proceed to
OK
NG



OK

CHECK FOR INTERMITTENT PROBLEMS

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>SFI SYSTEM>CHECK FOR INTERMITTENT PROBLEMS


NG

2.CHECK STOP LIGHT SWITCH ASSEMBLY INSTALLATION
2.CHECK STOP LIGHT SWITCH ASSEMBLY INSTALLATION
a.

Check the stop light switch installation.

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

OK:

Stop light switch is installed correctly.



Result:
Proceed to
OK
NG



OK

3.INSPECT STOP LIGHT SWITCH ASSEMBLY

NG

SECURELY REINSTALL STOP LIGHT SWITCH ASSEMBLY

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


3.INSPECT STOP LIGHT SWITCH ASSEMBLY
a.

Inspect the stop light switch assembly.

Click hereVehicle Exterior>LIGHTING (EXT)>STOP LIGHT SWITCH>ON-VEHICLE INSPECTION


Result:
Proceed to
OK
NG



OK

4.CHECK TERMINAL VOLTAGE (STP VOLTAGE)

NG

REPLACE STOP LIGHT SWITCH ASSEMBLY

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


4.CHECK TERMINAL VOLTAGE (STP VOLTAGE)
a.

Disconnect the ECM connector.

A413866C15
3.875,1.292 4.333,1.594 0.458,0.302 6.24,0.823 5.885,1.313 true 1.344,1.938 1.656,2.135 0.313,0.198 10 false *a 2.708,1.875 3.021,2.073 0.313,0.198 10 false *b 3.99,1.354 4.604,1.552 0.615,0.198 10 false A46 4.156,0.635 4.469,0.833 0.313,0.198 10 false *c 6.219,0.667 6.677,0.865 0.458,0.198 10 false STP
*a Brake pedal depressed *b Brake pedal released
*c Front view of wire harness connector
(to ECM) 		- -



b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
A46-9 (STP) - Body ground Brake pedal released Below 1.5 V
Brake pedal depressed 7.5 to 14 V



Result:
Proceed to
OK
NG



OK

REPLACE ECM

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>ECM>REMOVAL


NG

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