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:

Confirm Vehicle Headunit Functionality
PROCEDURE 1. CHECK CUSTOMER'S CELLULAR PHONE COMPATIBILITY (a) Go to TIS "Bluetooth" Compatibility Portal and check if the cellular phone is compatible. Result Result Proceed to Cellular phone is compatible ...

Speaker Output Short (B15C3)
DESCRIPTION This DTC is stored when a malfunction occurs in the speakers. DTC No. DTC Detection Condition Trouble Area B15C3 A short is detected in the speaker output circuit. Harness or connector Speaker ...

Lost Communication with ECM / PCM "A" (U0100,U0101,U0123,U0126,U0129,U0142,U0155)
DESCRIPTION When a malfunction is detected between various ECUs and sensors, these DTCs are stored. DTC No. Detection Item DTC Detection Condition Trouble Area U0100 Lost Communication with ECM / PCM "A" ...