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:

Illumination Circuit
DESCRIPTION Power is supplied to the radio and display receiver assembly and steering pad switch assembly illumination when the light control switch is in the TAIL or HEAD position. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: The vehicle is equipped with a Supplemental Restrain ...

Installation
INSTALLATION PROCEDURE 1. INSTALL CENTER STOP LIGHT ASSEMBLY (for Bulb Type Stop Light) (a) Install the 3 center stop light bulbs to the 3 center stop light sockets. (b) Turn the 3 center stop light sockets with 3 center stop light bulbs in the direction indicated by the arrow sho ...

Check Bus 2 Line for Short to +B
DESCRIPTION There may be a short circuit between one of the CAN bus lines and +B when no resistance exists between terminal 18 (CA4H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 17 (CA4L) of the central gateway ECU (network gateway ECU) and ...