Toyota RAV4 manuals

Toyota Sienna Service Manual: ECU Power Source Circuit

DESCRIPTION

This is the power source for the tire pressure warning ECU.

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE: When replacing the tire pressure warning ECU, read the transmitter IDs stored in the old ECU using the intelligent tester and write them down before removal.

It is necessary to register an ID code after replacing the tire pressure warning valve and transmitter and/or the tire pressure warning ECU (See page TW-20).

1 INSPECT FUSE (ECU-IG)

(a) Remove the ECU-IG fuse from the instrument panel junction block.

(b) Measure the resistance of the fuse.

Standard resistance: Below 1 Ω

2 INSPECT IGNITION RELAY NO. 1

INSPECT IGNITION RELAY NO. 1

(a) Remove the IG1 relay from the instrument panel junction block.

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

Standard resistance

3 CHECK HARNESS AND CONNECTOR (ECU - BATTERY AND BODY GROUND)

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

(a) Disconnect the T15 ECU connector.

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

Standard voltage

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

Standard resistance

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See page TW-28)

Tire Pressure Warning Light Circuit
DESCRIPTION If the ECU detects trouble, the tire pressure warning light blinks (comes on after blinking for 1 minute) and tire pressure monitor is cancelled at the same time. At this time, the ECU ...

TC and CG Terminal Circuit
DESCRIPTION DTC output mode is set by connecting terminals 13 (TC) and 4 (CG) of the DLC3. The DTCs are indicated by blinks of the tire pressure warning light. WIRING DIAGRAM HINT: When eac ...

Other materials:

Voice Recognition Difficulty
INSPECTION PROCEDURE 1 CHECK CONDITION Check if the system's voice recognition level is low by using only one particular voice. OK: System's voice recognition level is low with any voice. 2 CHECK MAP DISC Check that the map disc is not deformed or cracked. OK: No deformation ...

Inspection
1. INSPECT MULTIPLE DISC CLUTCH HUB (a) Using a dial indicator, measure the inside diameter of the forward clutch hub bushing Standard inside diameter: 23.025 to 23.046 mm (0.9065 to 0.9073 in.) Maximum inside diameter: 23.09 mm (0.9091 in.) NOTICE: Check the contact surface of ...

Power Seat Motor Circuit
DESCRIPTION When the power seat control switch is operated, a command signal is sent to the position control ECU and switch assembly (power seat control switch and ECU). The front power seat switch then controls the appropriate seat motor as needed. This memory system does not use a seat po ...

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