12-36 FI SYSTEM DIAGNOSIS
5) Insert the needle-pointed probes to the lead wire coupler.
6) Measure the voltage between B/Bl wire terminal A and ground.
7) If OK, then measure the voltage between B/Bl wire terminal
A and B/Br wire terminal B.
ECT sensor voltage: 4.5 – 5.5 V
(+ B/Bl – - Ground)
(+ B/Bl – - B/Br)
09900-25008: Multi circuit tester set
09900-25009: Needle-pointed probe set
36890-28H00: Battery lead wire (option)
Tester knob indication: Voltage ()
Is the voltage OK?
Step 1 (When indicating P0115-H:)
1) Stop the engine.
2) Check the ECT sensor coupler 1 for loose or poor contacts.
If OK, then check the ECT sensor lead wire continuity.
3) Remove the fuel tank. (13-2, -3)
4) Disconnect the ECT sensor coupler and ECM coupler.
5) Insert the needle-pointed probes to the lead wire coupler.
6) Check the continuity between B/Bl wire A and terminal L.
7) Also, check the continuity between B/Br wire B and terminal
N.
ECT sensor 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?
YES Go to Step 2.
NO
• Loose or poor contacts on the ECM coupler
(terminal L or N).
• Open or short circuit in the B/Bl wire or B/Br wire.
1
1
YES Go to Step 2.
NO B/Bl or B/Br wire open.
1
ECM coupler (Harness side)
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