Toyota Tundra. Manual — part 1589

NG: REPLACE ECM (See REMOVAL )

OK: CHECK FOR INTERMITTENT PROBLEMS (See CHECK FOR INTERMITTENT
PROBLEMS )

DTC P0617 STARTER RELAY CIRCUIT HIGH

DESCRIPTION

While the engine is being cranked, the positive battery voltage is applied to terminal STA of the ECM. If the
ECM detects the Starter Control (STA) signal while the vehicle is being driven, it determines that there is a
malfunction in the STA circuit. The ECM then illuminates the MIL and stores the DTC. This monitor runs
when the vehicle is driven at 20 km/h (12.4 mph) for over 20 seconds.

DTC DETECTION CONDITION AND TROUBLE AREA REFERENCE CHART

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS

DTC

DTC Detection Condition

Trouble Area

P0617

When conditions (a), (b) and (c)
met, positive (+B) battery voltage
10.5 V or more applied to ECM
for 20 seconds (1 trip detection
logic)

a. Vehicle speed 20 km/h (12.4

mph) or more

b. Engine speed 1000 RPM or

more

c. STA signal ON



Park/Neutral Position (PNP)
switch



Starter relay circuit



Ignition switch



ECM

Related DTCs

P0617 Starter signal

Required Sensors/Components (Main)

ST relay, PNP switch and Ignition switch

Required Sensors/Components (Related) Vehicle Speed Sensor (VSS), Crankshaft Position (CKP) sensor
Frequency of Operation

Continuous

Duration

20 seconds

MIL Operation

Immediate

Sequence of Operation

None

Monitor runs whenever following DTCs not present

None

Battery voltage

10.5 V or more

Vehicle speed

20 km/h (12.5 mph) or more

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

TYPICAL MALFUNCTION THRESHOLDS

TYPICAL MALFUNCTION THRESHOLDS CONDITIONS

WIRING DIAGRAM

Fig. 202: Starter Relay - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

HINT



The following troubleshooting flowchart is based on the premise that the engine is cranked normally. If
the engine will not crank, proceed to the PROBLEM SYMPTOMS TABLE .



Read freeze frame data using the Techstream. Freeze frame data records the engine condition when
malfunctions are detected. 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.

1. READ VALUE USING TECHSTREAM (STARTER SIGNAL)

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch to ON and turn the Techstream ON.

Engine speed

1000 RPM or more

Starter signal

ON

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

c. Enter the following menus Powertrain/Engine and ECT/Data List/All Data/Starter Signal.

d. Check the value displayed on the Techstream when the ignition switch is turned to the ON and

START positions.

OK

STARTER SIGNAL CONDITIONS

NG: Go to step 2

OK: CHECK FOR INTERMITTENT PROBLEMS (See CHECK FOR INTERMITTENT
PROBLEMS )

2. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

a. Disconnect the D35 PNP switch connector.

Fig. 203: Identifying D35 PNP Switch Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

Ignition Switch Position Starter Signal

ON

OFF

START

ON

Tester Connection

Condition

Specified Condition

4 (B) - 5 (L)

Shift lever position P

Below 1 ohms

Shift lever position N

Below 1 ohms

Shift lever position not on P or N 10 kohms or higher

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Result

RESULT CHART

B: Go to step 5

A: Go to Next Step

3. REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY

a. Replace the park/neutral position switch (See REMOVAL ).

4. READ VALUE USING TECHSTREAM (STARTER SIGNAL)

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch to ON and turn the Techstream ON.

c. Enter the following menus Powertrain/Engine and ECT/Data List/All Data/Starter Signal.

d. Check the value displayed on the Techstream when the ignition switch is turned to the ON and

START positions.

OK

STARTER SIGNAL CONDITIONS

NG: Go to step 5

OK: SYSTEM OK

5. INSPECT IGNITION SWITCH ASSEMBLY

a. Disconnect the J9 ignition switch connector.

Result Proceed to

NG

A

OK

B

Ignition Switch Position Starter Signal

ON

OFF

START

ON

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra