Toyota Tacoma (2015-2018) Service Manual: Lost Communication With ECM/PCM "A" Missing Message (U010087)

Toyota Tacoma (2015-2018) Service Manual / Rc62f Manual Transmission / Transaxle / Manual Transmission System / Lost Communication With ECM/PCM "A" Missing Message (U010087)

DESCRIPTION

The engine control unit and transmission control unit are located inside the ECM. The engine control unit intercommunicates with the transmission control ECU via CAN communication. If there is a problem in this intercommunication, the ECM stores this DTC.

DTC Code	DTC Detection Condition	Trouble Area	SAE
U010087	Following conditions are met for 1.25 seconds (1 trip detection logic): The ignition switch is ON Battery voltage is 9.5 V or more No communication between engine control unit and transmission control unit	ECM	U0100

CAUTION / NOTICE / HINT

HINT:

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.

Check that the battery voltage is 9.5 V or more.
Turn the ignition switch to ON.
Check for DTCs again (See page ).

PROCEDURE

1.	CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC U010087)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Check if DTCs are output.

Result

Result	Proceed to
Only DTC U010087 is output	A
DTC U010087 and other DTCs are output	B

REPLACE ECM

GO TO DTC CHART

Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART Manual Transmission System DTC Code Detection Item MIL Memory See page P03352A Cranks ...

Crankshaft Position Sensor "A" Signal Stuck in Range (P03352A,P033531)

DESCRIPTION The crankshaft position sensor system consists of a crankshaft position sensor plate and a pickup coil. The crankshaft position sensor plate has 34 teeth and is installed to the crank ...

Other materials:

Brake Switch "B" Circuit Short to Battery (P070312)
DESCRIPTION The purpose of this circuit is to prevent the engine from stalling while driving in lock-up when the brakes are suddenly applied. When the brake pedal is depressed, this switch sends a signal to the ECM. Then the ECM cancels the operation of the lock-up clutch while braking is in p ...

Open in Rear Floor Electrical Key Oscillator Circuit (B27A6)
DESCRIPTION The certification ECU (smart key ECU assembly) generates a request signal and transmits the signal to the No. 2 indoor electrical key antenna assembly (rear floor). For the No. 2 indoor electrical key antenna assembly (rear floor) to detect when the electrical key transmitter sub- ...

Side doors
The vehicle can be locked/unlocked using the wireless remote control, key or door lock switch. ■ Wireless remote control (if equipped) ■ Key Regular Cab models Locks the door Unlocks the door Access Cab and Double Cab models Locks all doors Unlocks all doors Turning ...