Toyota Tundra. Manual — part 1269

Fig. 264: Identifying IGN Fuse

OK : Go to next step.

7. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - ECM, INTEGRATION

RELAY - BODY GROUND)

a. Remove the integration relay from the engine room junction block (See ON-VEHICLE

INSPECTION ).

b. Disconnect the A24 ECM connector.

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

Standard resistance (Check for open)

TESTER CONNECTION SPECIFIED CONDITION

Standard resistance (Check for short)

TESTER CONNECTION SPECIFIED CONDITION

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

Tester Connection

Condition Specified Condition

1B-8 - A24-28 (IGSW) Always

Below 1 ohms

Tester Connection

Condition Specified Condition

1B-8 or A24-28 (IGSW) - Body ground Always

10 kohms or higher

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

Fig. 265: Checking Harness & Connector (Integration Relay - ECM, Integration Relay - Body
Ground)

OK : Go to next step.

8. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - IGNITION SWITCH

ASSEMBLY)

a. Check the harness and the connectors between the integration relay and the ignition switch.

1. Remove the integration relay from the engine room junction block (See ON-VEHICLE

INSPECTION ).

2. Disconnect the J9 ignition switch connector.

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

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

Standard resistance (Check for open)

TESTER CONNECTION SPECIFIED CONDITION

Standard resistance (Check for short)

TESTER CONNECTION SPECIFIED CONDITION

b. Check the harness and connectors between the integration relay and body ground.

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

Standard resistance (Check for open)

TESTER CONNECTION SPECIFIED CONDITION

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

Tester Connection Condition Specified Condition

1B-6 - J9-6 (IG2)

Always

Below 1 ohms

Tester Connection

Condition Specified Condition

1B-6 or J9-6 (IG2) - Body ground Always

10 kohms or higher

Tester Connection Condition Specified Condition

1B-7 - Body ground Always

Below 1 ohms

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

Fig. 266: Checking Harness & Connector (Integration Relay - Ignition Switch Assembly)

OK : Go to next step.

9. INSPECT IGNITION SWITCH ASSEMBLY

a. Disconnect the J9 ignition switch connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra