Toyota 4Runner: Diagnostic Trouble Code Chart

Toyota 4Runner Service Manual / Power Source / Network / Networking / Can Communication System / Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART

HINT:

If a trouble code is output during the DTC check, inspect the trouble areas listed for that code. For details of code, refer to the "See page" below.

CAN Communication System

DTC Code	Detection Item	Trouble Area	DTC Output from
U0100	Lost Communication with ECM / PCM "A"	- Power source or inside ECM - ECM main wire or connector - ECM	Power management control ECU
U0164	Lost Communication with A/C ECU	- Power source or inside air conditioning amplifier assembly - Air conditioning amplifier assembly branch wire or connector - Air conditioning amplifier assembly	Power management control ECU
U1002	Lost Communication with Gateway Module (Power Management2)	- Power management bus circuit - Air conditioning amplifier assembly branch wire or connector - Power management control ECU main wire or connector - ECM main wire or connector - Air conditioning amplifier assembly - Power management control ECU - ECM - No. 4 junction connector	Power management control ECU
U0208	Lost Communication with "Seat Control Module A"	- Power source or inside front power seat switch LH - Front power seat switch LH branch wire or connector - Front power seat switch LH	Main body ECU (multiplex network body ECU)
U1002	Lost Communication with Gateway Module (MS Bus)	- Main body ECU (multiplex network body ECU) - Drive monitor switch - Harness or connector	Main body ECU (multiplex network body ECU)
U1002	Lost Communication with Gateway Module (MS Bus)	- MS bus circuit - Front power seat switch LH branch wire or connector - Main body ECU (multiplex network body ECU) main wire or connector - Combination meter assembly main wire or connector - Main body ECU (multiplex network body ECU) - Combination meter assembly - Front power seat switch LH - No. 2 junction connector	Main body ECU (multiplex network body ECU)
U1114	Lost Communication with Main Switch Module	- Power source or inside drive monitor switch - Drive monitor switch main wire or connector - Drive monitor switch	Main body ECU (multiplex network body ECU)

Fail-safe Chart

FAIL-SAFE CHART 1. FAIL-SAFE FUNCTION (a) When communication fails in any of the main wires (communication lines) due to a short circuit or other causes, the fail-safe function, which is specified ...

Lost Communication with Gateway Module (Power Management2) (U1002)

DESCRIPTION The power management control ECU stores this DTC when no signals can be received from the ECUs that are memorized as those connected to the power management bus. When t ...

Other materials about Toyota 4Runner:

Reassembly
REASSEMBLY PROCEDURE 1. INSTALL FRONT PROPELLER SHAFT UNIVERSAL JOINT SPIDER BEARING HINT: Use the same procedure for all propeller shaft universal joint spider bearing. (a) Apply MP grease to a new spider and spider bearing. NOTICE: Be c ...

Short to GND in CAN Bus Line
DESCRIPTION There may be a short circuit between the CAN bus lines and GND when the resistance between terminals 6 (CANH) and 4 (CG) or terminals 14 (CANL) and 4 (CG) of the DLC3 is below 200 Ω. Symptom Trouble Area ...