Lexus ES manuals

Lexus ES: Engine Circuit Malfunction (C1280)

Lexus ES (XZ10) Service Manual / Drivetrain / Gf1a (transfer / 4wd / Awd) / Dynamic Torque Control Awd System / Engine Circuit Malfunction (C1280)

DESCRIPTION

If a malfunction in the ECM circuit occurs, the 4WD ECU assembly will output this DTC.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1280

Engine Circuit Malfunction

When the following continues for 5 seconds or more:

  • Communication with ECM is operating normally, but engine control system is malfunctioning.
  • Engine control system
  • 4WD ECU assembly

PROCEDURE

1.

CHECK FOR DTC (ENGINE CONTROL SYSTEM)

(a) Check if the engine control system DTC is output.

Powertrain > Engine > Trouble Codes

Result

Proceed to

Engine control system DTC is not output

A

Engine control system DTC is output

B
A

REPLACE 4WD ECU ASSEMBLY

B

GO TO ENGINE CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)

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 Disassembly

DISASSEMBLY PROCEDURE 1. REMOVE FRONT DRIVE SHAFT OIL SEAL RH (a) Hold the differential case assembly in a vise between aluminum plates. NOTICE: Do not overtighten the vise. (b) Using SST, remove the front drive shaft oil seal RH from the differential case assembly. SST: 09308-00010 N

 Installation

INSTALLATION CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH side and LH side. The following procedure is for the LH side. PROCEDURE 1. INSTALL NO. 3 WINDSHIELD OUTSIDE MOULDING CLIP HINT: Perform the following procedure only when replacement of a No. 3 windshield outside mou

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