Last Modified: 11-29-2007 1.6 J
Service Category: Power Source/Network Section: Networking
Model Year: 2008 Model: Sequoia Doc ID: RM000002VTH003X
Title: NETWORKING: CAN COMMUNICATION SYSTEM: DESCRIPTION (2008 Sequoia)

Combination Meter ECU Communication Stop Mode

DESCRIPTION

Detection Item

Symptom

Trouble Area

Combination Meter ECU Communication Stop Mode

When either condition below is met:

  • Combination Meter is not displayed on "CAN Bus Check".
  • Applies to "Combination Meter ECU Communication Stop Mode" in "DTC Combination Table".
  • Power source or inside combination meter ECU
  • Harness or connector
  • Combination meter ECU

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (COMBINATION METER ECU - BATTERY AND BODY GROUND)

(a) Disconnect the H37 combination meter ECU connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

H37-40 (E1) - Body ground

Always

Below 1 Ω

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

H37-18 (B) - Body ground

Always

11 to 14 V

H37-20 (IG+) - Body ground

Ignition switch ON
OK