STOP AND START SYSTEM, Diagnostic DTC:P1862

DTC Code	DTC Name
P1862	Clutch Control System 2

DESCRIPTION

There are 2 clutch pedal switches for the clutch pedal. The No. 2 clutch start switch assembly (upper) is used for stopping and restarting the engine due to Stop and Start system control. In the Stop and Start system control, the clutch start switch assembly (lower) is used only when the No. 2 clutch start switch assembly (upper) is stuck on or the fail-safe function is activated.

DTC No.	DTC Detection Condition	Trouble Area
P1862	Both of the following conditions continue for 0.5 seconds or more (1 trip detection logic): Clutch start switch assembly (lower) ON. No. 2 clutch start switch assembly (upper) ON.	Clutch start switch assembly (lower) No. 2 clutch start switch assembly (upper) Harness or connector Engine stop and start ECU

DTC No.

DTC Detection Condition

Trouble Area

P1862

Both of the following conditions continue for 0.5 seconds or more (1 trip detection logic):

Clutch start switch assembly (lower) ON.
No. 2 clutch start switch assembly (upper) ON.

Clutch start switch assembly (lower)
No. 2 clutch start switch assembly (upper)
Harness or connector
Engine stop and start ECU

Tech Tips

DTCs for the Stop and Start system are not cleared even if the malfunction has been repaired. After repairing the malfunction, be sure to clear the DTCs Click here.

After troubleshooting, perform the following steps to recheck for DTCs.

Tech Tips

If the battery terminal has been disconnected, the stop and start will be prohibited. In this case, drive the vehicle for 15 to 40 minutes to permit the stop and start operation.
Allow the engine to idle for 3 minutes after the engine warms up and check that the engine speed is within 50 rpm of the target idle speed.

Connect the intelligent tester to the DLC3.
Clear the DTCs Click here.
Start the engine.


*a	Clutch Switch Signal
*b	ON
*c	OFF
*d	1 second or more

Fully depress the clutch pedal for 1 second or more. Release the clutch pedal and wait for at least 1 second.

Repeat the previous step 3 times.
Check that no DTCs are output Click here.

Check if the Stop and Start system operates normally.

Tech Tips

If the battery terminal has been disconnected, the stop and start cancel indicator will be illuminated. In this case, drive the vehicle for 15 to 40 minutes to turn off the indicator.
1. Warm up the engine.
2. Turn the air conditioning system off.
3. Drive the vehicle at 7 km/h (4.3 mph) or more.
4. Stop the vehicle. Move the shift lever to neutral and release the clutch pedal.
5. Check that the engine stops.
6. Depress the clutch pedal and check that the engine restarts.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

Note

If the engine stop and start ECU is being replaced, download the number of starter operations to the tester from the old ECU before removing it, and then upload the number of starter operations from the tester to the new engine stop and start ECU after installing the ECU Click here.
After the engine stop and start ECU is replaced or after an air conditioner kit is installed, clear the A/C information stored in the engine stop and start ECU Click here.
When the engine stop and start ECU or components of the VSC system are replaced, initialization/obtainment of 0 point learning information is performed for the engine stop and start ECU Click here.
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

READ VALUE USING INTELLIGENT TESTER (CLUTCH UPPER AND LOWER SIGNAL)

Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the tester on.
Enter the following menus: Powertrain / Stop and Start / Data List / Clutch Upper SW and Clutch Lower SW.

Depress the clutch pedal and read the values displayed on the tester.

Item	Clutch Pedal Condition	Tester Display
Clutch Upper SW	Fully Depressed	OFF
Clutch Lower SW	Fully Depressed	ON
Clutch Upper SW	Fully Released	ON
Clutch Lower SW	Fully Released	OFF

USE SIMULATION METHOD TO CHECK Click here

INSPECT NO. 2 CLUTCH START SWITCH ASSEMBLY (UPPER)
1. Inspect the No. 2 clutch start switch assembly (upper) Click here.
NG
REPLACE NO. 2 CLUTCH START SWITCH ASSEMBLY (UPPER) Click here

OK
INSPECT CLUTCH START SWITCH ASSEMBLY (LOWER)
1. Inspect the clutch start switch assembly (lower) Click here.
NG
REPLACE CLUTCH START SWITCH ASSEMBLY (LOWER) Click here

OK

CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - NO. 2 CLUTCH START SWITCH ASSEMBLY (UPPER))

Disconnect the F75 engine stop and start ECU connector.
Disconnect the A40*1, A41*2 or A82*3 No. 2 clutch start switch assembly (upper) connector.

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

*1: for TMC Made LHD

*2: for RHD

*3: for TMMF Made LHD

Standard Resistance

for TMC Made LHD:
Tester Connection	Condition	Specified Condition
F75-3 (CLU) - A40-2	Always	Below 1 Ω
F75-20 (CLU) or A40-2 - Body ground	Always	10 kΩ or higher

for RHD:
Tester Connection	Condition	Specified Condition
F75-3 (CLU) - A41-2	Always	Below 1 Ω
F75-20 (CLU) or A41-2 - Body ground	Always	10 kΩ or higher

for TMMF Made LHD:
Tester Connection	Condition	Specified Condition
F75-3 (CLU) - A82-2	Always	Below 1 Ω
F75-20 (CLU) or A82-2 - Body ground	Always	10 kΩ or higher

Turn the ignition switch to ON.

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

Standard Voltage

Tester Connection	Switch Condition	Specified Condition
F75-3 (CLU) - Body ground	Ignition Switch ON	Below 1 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - CLUTCH START SWITCH ASSEMBLY (LOWER))

Disconnect the A53 engine stop and start ECU connector.
Disconnect the A39 clutch start switch assembly (lower) connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
A53-6 (CLL) - A39-2	Always	Below 1 Ω
A53-6 (CLL) - Body ground	Always	10 kΩ or higher
A39-2 - Body ground	Always	10 kΩ or higher

REPLACE ENGINE STOP AND START ECU Click here

REPAIR OR REPLACE HARNESS OR CONNECTOR