FI SYSTEM DIAGNOSIS 4-83
Step 1 (When indicating P1657-H:)
1) Turn the ignition switch OFF.
2) Lift and support the fuel tank. (5-3)
3) Check the EXCVA position sensor coupler for loose or poor
contacts.
If OK, then check the EXCVA position sensor lead wire conti-
nuity.
4) Disconnect the EXCVA position sensor coupler.
5) Check the continuity between Red wire C and Yellow wire
A.
If the sound is not heard from the tester, the circuit condition
is OK.
6) Disconnect the ECM coupler.
7) Check the continuity between Yellow wire A and terminal 5.
8) Also, check the continuity between B/Br wire B and terminal
S.
EXCVA lead wire continuity:
Continuity ()
09900-25008: Multi-circuit tester set
09900-25009: Needle pointed probe set
Tester knob indication: Continuity test ()
Is the continuity OK?
9) After repairing the trouble, clear the DTC using SDS tool.
(4-27)
1
1
]
YES Go to Step 4.
NO Yellow wire shorted to VCC, or B/Br wire open
1
!
ECM coupler (Harness side)
(Black)
(Gray)
SAMPLE
To Next Page
Loading...
