Toyota 4Runner manuals

Toyota 4Runner: ECM Communication Circuit Malfunction (C1203)

DESCRIPTION

The circuit is used to send control information from the skid control ECU to the ECM, and engine control information from the ECM to the skid control ECU via the CAN communication system.

DTC Code

DTC Detection Condition

Trouble Area

C1203

The engine/drivetrain specification and/or destination information from the ECM does not match the skid control ECU data.

ECM

PROCEDURE

1.

CHECK DTC (ENGINE CONTROL SYSTEM)

(a) Check if any DTC is recorded for the engine control system (See page ).


Result

Result

Proceed to

DTC is not output

A

DTC is output

B


A

REPLACE ECM


B

GO TO ENGINE CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

Open in ABS Solenoid Relay Circuit (C0278,C0279)
DESCRIPTION The solenoid relay is built into the master cylinder solenoid. This relay supplies power to each solenoid. If the initial check is OK, after the ignition switch is turned to ON, the re ...

ECU Initial Setting Incomplete (C120A)
DESCRIPTION w/ Downhill Assist Control or w/ Crawl Control: When the master cylinder solenoid (skid control ECU) is replaced, the master cylinder solenoid (skid control ECU) must be informed that ...

Other materials about Toyota 4Runner:

Terminals Of Ecu
TERMINALS OF ECU 1. CHECK POWER STEERING ECU ASSEMBLY (a) Measure the voltage and resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition ...

Short in Driver Side Squib Circuit (B1800/51-B1803/51)
DESCRIPTION The driver side squib circuit consists of the center airbag sensor, spiral cable and steering pad. The circuit instructs the SRS to deploy when deployment conditions are met. These DTCs are stored when a malfunction is detec ...

© 2016-2020 | www.to4runner.net

0.006