Toyota Venza manuals

Toyota Venza: Starter Relay Circuit High (P0617)

DESCRIPTION

While the engine is being cranked, battery voltage is applied to terminal STA of the TCM.

If the TCM detects the Starter Control (STA) signal while the vehicle is being driven, it determines that there is a malfunction in the STA circuit. The TCM then illuminates the MIL and sets the DTC.

This monitor runs when the vehicle is driven at 20 km/h (12.4 mph) for over 20 seconds.

DTC No.

DTC Detection Condition

Trouble Area

P0617

When conditions (a), (b) and (c) are met, positive (+B) battery voltage 10.5 V or more applied to TCM for 20 seconds

(1 trip detection logic):

(a) Vehicle speed more than 20 km/h (12.4 mph)

(b) Engine speed more than 1000 rpm

(c) STA signal ON

  • Park/Neutral Position switch
  • Starter relay circuit
  • Cranking holding function circuit
  • TCM

MONITOR STRATEGY

Related DTCs

P0617: Starter signal

Required Sensors/Components (Main)

STARTER relay, PMP switch, ignition switch

Required Sensors/Components (Sub)

Vehicle speed sensor (VSS), Crankshaft Position (CKP) sensor

Frequency of Operation

Continuous

Duration

20 seconds

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever these DTCs are not present:

None

Battery voltage

10.5 V or more

Vehicle speed

12.43 mph (20 km/h) or more

Engine speed

1,000 rpm or more

TYPICAL MALFUNCTION THRESHOLDS

Starter signal

ON

WIRING DIAGRAM


CAUTION / NOTICE / HINT

NOTICE:

Perform the universal trip to clear permanent DTCs (See page ).


HINT:

  • The following troubleshooting flowchart is based on the premise that the engine is cranked normally. If the engine does not crank, proceed to the problem symptoms table (See page
    ).
  • Read freeze frame data using the Techstream. The TCM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction (See page ).

PROCEDURE

1.

READ VALUE USING TECHSTREAM (STARTER SIGNAL)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / ECT / Data List.

(e) Read the value displayed on the Techstream.

(f) Crank the engine.

(g) Read the value displayed on the Techstream.

OK:

Tester Display

Condition

Standard

Starter Signal

ignition switch ON

OFF

Starter Signal

Engine is cranking

ON


OK

GO TO STEP 3


NG

2.

INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

(a) Disconnect the park/neutral position switch connector.


(b) Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position.

Standard Resistance:

Tester Connection

Shift Lever Position

Specified Condition

4 (B) - 9 (L)

P

Below 1 Ω

N

Below 1 Ω

Except P and N

10 kΩ or higher

1 (RB) - 9 (L)

P

10 kΩ or higher

R

10 kΩ or higher

N

10 kΩ or higher

D

10 kΩ or higher

Text in Illustration

*1

Component without harness connected

(Park/Neutral Position Switch)


NG

REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY


OK

3.

CHECK TCM (STA VOLTAGE)

(a) Connect the park/neutral position switch connector.


(b) Disconnect the TCM connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

B40-10 (STA) - Body ground

ignition switch ON and shift lever in P or N

Below 2 V

ignition switch ON and shift lever not in P or N

Below 1 V

Text in Illustration

*1

Front view of wire harness connector

(to TCM)


OK

REPLACE TCM


NG

4.

CHECK HARNESS AND CONNECTOR (TCM - PARK/NEUTRAL POSITION SWITCH)

(a) Disconnect the TCM connector.


(b) Remove the ST relay from the engine room relay block.

(c) Disconnect the park/neutral position switch connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

B40-10 (STA) - Body ground

ignition switch ON

Below 1 V

Text in Illustration

*1

Front view of wire harness connector

(to TCM)


OK

CHECK STARTER SIGNAL CIRCUIT


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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