Operation CHARM: Car repair manuals for everyone.
Home >> Toyota >> 2003 >> Tundra 2WD V6-3.4L (5VZ-FE) >> Repair and Diagnosis >> Accessories and Optional Equipment >> General Module >> Testing and Inspection
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

General Module: Testing and Inspection







W/ Daytime running light:
CHECK INTEGRATION RELAY (DRIVER SIDE JUNCTION BLOCK) CIRCUIT
a. Disconnect the 1H, 1I,1J, 1K and 1N driver side junction block connectors, and check the voltage or continuity of each terminal of the wire harness side connectors.

If the result is not as specified, there may be a malfunction on the wire harness side.
If the result is not as specified, the integration relay (junction block) may malfunction

b. Reconnect the 1H, 1l,1J, 1K and 1N junction block connectors, and check the voltage of each terminal of the connectors.




If the result is not as specified, the integration relay (junction block) may malfunction







c. Remove the integration relay from the driver side junction block, and check the voltage or continuity on each terminal of the junction block side.

If the result is not as specified, replace the driver side junction block.







w/o Daytime running light:
CHECK INTEGRATION RELAY (DRIVER SIDE JUNCTION BLOCK) CIRCUIT

a. Disconnect the 1H, 1I, 1K, 1J and 1L driver side junction block connectors, and check the voltage or continuity of each terminal of the wire harness side connectors.
If the result is not as specified, there may be a malfunction on the wire harness side.
If the result is not as specified, the integration relay junction block) may malfunction.

b. Reconnect the 1H, 1I,1K, 1J and 1N junction block connectors, and check the voltage of each terminal of the connectors




If the result is not as specified, the integration relay junction block) may malfunction.




c. Remove the integration relay from the driver side junction block, and check the voltage or continuity of each terminal on the junction block side.
pro multis · About Operation CHARM