RM38N0EC _55 Steering _111819 POWER ASSIST SYSTEMS _0501137 POWER STEERING SYSTEM J

POWER ASSIST SYSTEMS  POWER STEERING SYSTEM  Drive Mode Select Switch Circuit  


SYSTEM DESCRIPTION

The ECM changes between Normal, Sport and Eco drive mode in accordance with the output of the drive mode select switch (combination switch assembly).

WIRING DIAGRAM

C400783E13
2.26,1.823 2.719,2.021 0.458,0.198 10 false E28 5.302,1.219 5.76,1.417 0.458,0.198 10 false 56 5.958,1.927 6.417,2.125 0.458,0.198 10 false A109 6.26,1.052 6.719,1.25 0.458,0.198 10 false 12V 6.25,0.479 6.708,0.677 0.458,0.198 10 false 12V 5.302,0.656 5.76,0.854 0.458,0.198 10 false 58 4.063,0.646 4.521,0.844 0.458,0.198 10 false 6 4.073,1.208 4.531,1.406 0.458,0.198 10 false 7 2.146,1.208 2.604,1.406 0.458,0.198 10 false 5 2.271,1.979 4.156,2.479 1.885,0.5 10 false Combination Switch Assembly (Drive Mode Select Switch) 5.958,2.083 6.458,2.417 0.5,0.333 10 false ECM 5.573,0.646 6.188,0.844 0.615,0.198 10 false DMS+ 5.583,1.208 6.198,1.406 0.615,0.198 10 false DMS- 3.823,1.208 4.438,1.406 0.615,0.198 10 false E 3.677,0.646 4.292,0.844 0.615,0.198 10 false SEL 2.375,1.208 3.01,1.406 0.635,0.198 10 false E

PROCEDURE

1.READ VALUE USING GTS (MODE CANCEL SW AND POWER MODE SW)
a.

According to the display on the GTS, read the Data List.

Powertrain > Engine > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Drive Mode Select Switch (DMS+) Drive mode select switch (combination switch assembly) status ON or OFF
·

ON: Drive mode select switch (combination switch assembly) pushed forward

·

OFF: Drive mode select switch (combination switch assembly) in neutral position


-
Drive Mode Select Switch (DMS-) Drive mode select switch (combination switch assembly) status ON or OFF
·

ON: Drive mode select switch (combination switch assembly) pulled rearward

·

OFF: Drive mode select switch (combination switch assembly) in neutral position


-
Powertrain > Engine > Data List
Tester Display
Drive Mode Select Switch (DMS+)
Drive Mode Select Switch (DMS-)
50003 372 1330,1329

Result:
Result Proceed to
Data List value is normal A
Data List value is not normal B



A

REPLACE ECM

Click hereEngine / Hybrid System>M20C-FKS, M20D-FKS (ENGINE CONTROL)>ECM>REMOVAL


B

2.INSPECT COMBINATION SWITCH ASSEMBLY
2.INSPECT COMBINATION SWITCH ASSEMBLY
a.
C397734C07
2.083,1.417 2.417,1.833 true 1.583,1.417 1.417,1.833 true 1.833,1.417 2,1.833 true 0.167,0.177 0.479,0.333 0.313,0.156 10 false *a 2.417,1.854 2.573,2.052 0.156,0.198 10 false E 1.365,1.854 1.688,2.052 0.323,0.198 10 false E 1.875,1.854 2.281,2.083 0.406,0.229 10 false SEL
*a Component without harness connected
(Combination Switch Assembly (Drive Mode Select Switch))


Remove the combination switch assembly.

Click hereDrivetrain>K120 / K120F / K121 / K121F (CVT)>COMBINATION SWITCH>REMOVAL


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
6 (SEL) - 5 (E) Drive mode select switch pushed forward Below 50 Ω
6 (SEL) - 5 (E) Drive mode select switch in neutral position 10 kΩ or higher
7 (E) - 5 (E) Drive mode select switch pulled rearward Below 50 Ω
7 (E) - 5 (E) Drive mode select switch in neutral position 10 kΩ or higher



c.

Install the combination switch assembly.

Click hereDrivetrain>K120 / K120F / K121 / K121F (CVT)>COMBINATION SWITCH>INSTALLATION


Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY - BODY GROUND)

NG

REPLACE COMBINATION SWITCH ASSEMBLY

Click hereDrivetrain>K120 / K120F / K121 / K121F (CVT)>COMBINATION SWITCH>REMOVAL


3.CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY - BODY GROUND)
a.

Disconnect the E28 combination switch assembly connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition

Click Location & Routing(E28)Location & Routing

Click Connector(E28)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Combination Switch Assembly

E28-5 (E) - Body ground Always Below 1 Ω



c.

Connect the E28 combination switch assembly connector.


Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY - ECM)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

Disconnect the A109 ECM connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition

Click Location & Routing(A109)Location & Routing

Click Connector(A109)Engine Compartment>Engine Room Main Wire / Transmission Wire>ECM

A109-58 (DMS+) - Body ground Drive mode select switch pushed forward Below 50 Ω
A109-58 (DMS+) - Body ground Drive mode select switch in neutral position 10 kΩ or higher
A109-56 (DMS-) - Body ground Drive mode select switch pulled rearward Below 50 Ω
A109-56 (DMS-) - Body ground Drive mode select switch in neutral position 10 kΩ or higher



c.

Connect the A109 ECM connector.


Result:
Proceed to
OK
NG



OK

REPLACE ECM

Click hereEngine / Hybrid System>M20C-FKS, M20D-FKS (ENGINE CONTROL)>ECM>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR