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Engine Control System Self Diagnostics - 1GR-FE: Diagnosis Toyota 4Runner IV

Step-by-step instructions on "Engine Control System Self Diagnostics - 1GR-FE: Diagnosis" for Toyota 4Runner IV (2002–2005). Pick an article — removal, installation, adjustment and diagnostics with illustrations.

MALFUNCTION INDICATOR LIGHT INSPECTION

TESTING PROCEDURE

RETRIEVING DIAGNOSTIC TROUBLE CODES

NORMAL Mode Diagnostic Trouble Code Retrieval

CHECK Mode Diagnostic Trouble Code Retrieval (Toyota Hand-Held Tester Only)

CLEARING DIAGNOSTIC TROUBLE CODES

TEST DRIVE CONFIRMATION

DIAGNOSTIC TROUBLE CODE DEFINITIONS

DIAGNOSTIC TESTS

Diagnosis & Repair

Circuit Description

Confirmation Readiness Test

DTC P2A00: A/F SENSOR CIRCUIT SLOW RESPONSE (BANK 1 SENSOR 1) OR DTC P2A03: A/F SENSOR CIRCUIT SLOW RESPONSE (BANK 2 SENSOR 1)