Toyota Tundra 2005 Service - Repair - Maintenance page 1207

8 Check EFI relay.
EFI Relay
OK
9 Check for open and short in harness and connector between terminal MREL of
ECM and body ground.
ECM Connector
OK
Check for intermittent problems
(See page DI−430).
DIAGNOSTICS
PREPARATION:
Remove the EFI relay from the engine room J/B.
CHECK:
Inspect the EFI relay.
OK:
A19288
PREPARATION:
E3
Disconnect the E3 ECM connector.
CHECK:
Measure the resistance between the wire harness side connec-
tor and body ground.
OK:
MREL
B17417
− ENGINE (2UZ−FE)
Standard:
Terminal No.
3 − 5
3 − 5
NG Replace EFI relay.
Standard:
Tester Connection
MREL (E3−8) − Body ground
NG Repair or replace harness or connector.
Condition
Always
Apply B+ between
terminals 1 and 2
Specified Condition
Below 1 Ω
DI−923
Specified Condition
10 KΩ or higher
Below 1 Ω