Toyota Tacoma (2015-2018) Service Manual: Starter Relay Circuit Short to Battery (P061512)

Toyota Tacoma (2015-2018) Service Manual / Ac60e Automatic Transmission / Transaxle / Automatic Transmission System(for 2gr-fks) / Starter Relay Circuit Short to Battery (P061512)

DESCRIPTION

While the engine is being cranked, 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 (12.43 mph) or more for 20 seconds or more.

DTC Code	DTC Detection Condition	Trouble Area	SAE
P061512	All of the following conditions are met, and a (+B) battery voltage of 10.5 V or higher is applied to the ECM for 20 seconds or more (1 trip detection logic): (a) The vehicle speed is 20 km/h (12.43 mph) or more. (b) The engine speed is 1000 rpm or more. (c) The STA signal is on.	Park/Neutral position switch STA signal circuit ECM	P0617

MONITOR STRATEGY

Related DTCs	P0617: Starter signal/Verify input signal
Required Sensors/Components (Main)	Starter relay (ST), Park/neutral position switch, Certification ECU (smart key ECU assembly)*1
Required Sensors/Components (Sub)	Vehicle speed sensor (VSS), Crankshaft Position (CKP) sensor
Frequency of Operation	Continuous
Duration	20 sec.
MIL Operation	Immediately
Sequence of Operation	None

*1: w/ Smart key system

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	None
Battery voltage	10.5 V or higher
Ignition switch	ON
Vehicle speed	20 km/h (12.43 mph) or more
Engine speed	1000 rpm or more

TYPICAL MALFUNCTION THRESHOLDS

Starter signal

CONFIRMATION DRIVING PATTERN

CAUTION:

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

HINT:

After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
When clearing the permanent DTCs, refer to the Clear Permanent DTC procedure (See page ).

Connect the Techstream to the DLC3.
Turn the ignition switch to ON and turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Turn the ignition switch to ON and turn the Techstream on.
Start the engine.
Drive the vehicle for 20 seconds or more with the following conditions met [*1]:
- Engine speed is 1000 rpm or more.
- Vehicle speed is 20 km/h (12.43 mph) or more.
  HINT:
  
  [*1] : Normal judgment procedure.
  
  The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Stop the vehicle.
Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
Input the DTC: P061512.

Check the DTC judgment result.

Techstream 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
N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

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 or N/A, perform the normal judgment procedure again.

WIRING DIAGRAM

Refer to SFI system DTC P061512 (See page CAUTION / NOTICE / HINT ).

CAUTION / NOTICE / HINT

NOTICE:

Perform the universal trip to clear permanent DTCs (See page ).
Perform registration and/or initialization when parts related to the automatic transmission are replaced (See page ).

PROCEDURE

1.	READ VALUE USING TECHSTREAM (STARTER SW)

(a) Connect the Techstream to the DLC3.

(b) Turn the Ignition switch ON.

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

Transmission

Techstream Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Starter SW	Starter signal/ ON or OFF	ON: Starter operating OFF: Starter not operating	-

Techstream Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Starter SW

Starter signal/

ON or OFF

ON: Starter operating

OFF: Starter not operating

(e) Check the value displayed on the Techstream when the vehicle is driven at 20 km/h (12.43 mph) or more.

CAUTION:

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

Condition	Starter SW	Proceed to
Driving at 20 km/h (12.43 mph) or more	OFF	A
Driving at 20 km/h (12.43 mph) or more	ON	B

CHECK FOR INTERMITTENT PROBLEMS

2.	INSPECT PARK/NEUTRAL POSITION SWITCH

(a) Inspect the park/neutral position switch (See page ).

REPLACE PARK / NEUTRAL POSITION SWITCH

3.	REPAIR OR REPLACE HARNESS OR CONNECTOR (STA SIGNAL CIRCUIT)

(a) Repair or replace harness or connector (STA signal circuit).

4.	CHECK WHETHER DTC OUTPUT RECURS (DTC P061512)

(a) Connect the Techstream to the DLC3.

(b) Turn the Ignition switch ON.

(d) Clear the DTCs (See page (e) Turn the Ignition switch off and wait for at least 30 seconds. ).

(e) Turn the Ignition switch off and wait for at least 30 seconds.

(f) Turn the Ignition switch ON and turn the Techstream on.

(g) Start the engine.

(h) Idle the engine for 5 seconds or more.

(i) Drive the vehicle at 24 km/h (15 mph) or more for 20 seconds or more.

CAUTION:

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

(j) Enter the following menus: Powertrain / Transmission / Trouble Codes.

(k) Read the DTCs using the Techstream.

Result:

Result	Proceed to
DTC P061512 is output	A
DTCs are not output	B

REPLACE ECM

END

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