Toyota Tacoma manuals

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):

  1. The ignition switch is ON
  2. Battery voltage is 9.5 V or more
  3. 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.

  1. Check that the battery voltage is 9.5 V or more.
  2. Turn the ignition switch to ON.
  3. 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.

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

(d) Check if DTCs are output.

Result

Result

Proceed to

Only DTC U010087 is output

A

DTC U010087 and other DTCs are output

B

A

REPLACE ECM

B

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:

Installation
INSTALLATION PROCEDURE 1. TEMPORARILY TIGHTEN FRONT SUSPENSION LOWER ARM (a) Align the matchmarks on the camber adjust cam No. 2 and toe adjust cam. Temporarily tighten the bolt and the nut. (b) Install the front lower ball joint attachment, a new nut and a new cotter pin. Torque: 140 N ...

Operation Check
OPERATION CHECK INPUT SIGNAL CHECK *a +RES *b -SET *c ON-OFF *d CANCEL (a) Connect the Techstream to the DLC3. (b) Check the cruise control main switch using the Data List functio ...

Engine Immobiliser System Malfunction (B2799,B279986)
DESCRIPTION This DTC is stored when one of the following occurs: 1) the ECM detects errors in its own communication with the transponder key ECU assembly; 2) the ECM detects errors in the communication lines; or 3) the ECU communication ID between the transponder key ECU assembly and ECM is d ...

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