Toyota Tundra. Manual — part 429

w/o TAIL Cancel Switch

RESISTANCE W/O TAIL CANCEL SWITCH REFERENCE

w/ TAIL Cancel Switch

RESISTANCE W/ TAIL CANCEL SWITCH REFERENCE

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE COMBINATION METER ASSEMBLY (see REMOVAL )

ACCESSORY METER DOES NOT ILLUMINATE

DESCRIPTION



This circuit provides power to the accessory meter.



The cruise information display of the accessory meter shows the vehicle information input into the
combination meter. The display can be changed by using the drive monitor switch.

WIRING DIAGRAM

Tester Connection

Condition Specified Condition

J28-1 (RHIG) - L4-7 (T)

Always

Below 1 ohms

J28-2 (TR) - L4-3 (RV)

J28-3 (E2) - L4-1 (E)

Tester Connection

Condition Specified Condition

J28-1 (RHIG) - L4-7 (T)

Always

Below 1 ohms

J28-2 (TR) - L4-3 (RV)

J28-3 (E2) - L4-1 (E)

J28-38 (TC) - L4-5 (TC)

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Meter - Tundra

Fig. 47: Accessory Meter Does Not Illuminate - Wiring Diagram (1 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Meter - Tundra

Fig. 48: Accessory Meter Does Not Illuminate - Wiring Diagram (2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. CHECK ACCESSORY METER ASSEMBLY

a. Check the malfunction of the accessory meter.

Result

ACCESSORY METER ASSEMBLY RESULT REFERENCE

B: Go to step 6

A: Go to next step

2. INSPECT FUSE (DOME, ECU-IG NO. 1, ACC)

a. Remove the DOME fuse from the engine room junction block.

b. Remove the ECU-IG No. 1 and ACC fuses from the main body ECU.

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

Result

Proceed to

Accessory meter does not display at all

A

Cruise information display does not change (w/ Cruise Information)

B

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Meter - Tundra

Standard resistance

FUSE (DOME, ECU-IG NO. 1, ACC) RESISTANCE REFERENCE

NG: REPLACE FUSE

OK: Go to next step

3. CHECK HARNESS AND CONNECTOR (ACCESSORY METER - BATTERY AND BODY

GROUND)

a. Disconnect the K20 accessory meter connector.

Fig. 49: Identifying K20 Accessory Meter Connector Terminal
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Standard voltage

HARNESS AND CONNECTOR (ACCESSORY METER - BATTERY AND BODY
GROUND) VOLTAGE SPECIFICATIONS

c. w/o Cruise information

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

Standard resistance

Tester Connection Condition Specified Condition

DOME fuse

Always

Below 1 ohms

ECU-IG No. 1 fuse

ACC fuse

Tester Connection

Switch Condition Specified Condition

K20-24 (B) - Body ground

Always

11 to 14 V

K20-23 (IG) - Body ground

Ignition switch ON

11 to 14 V

K20-22 (ACC) - Body ground Ignition switch ACC

11 to 14 V

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Meter - Tundra