FI SYSTEM DIAGNOSIS 12-51
Step 2
1) If necessary, connect the ECM coupler and TO sensor cou-
pler.
2) Insert the needle-pointed probes to the lead wire coupler.
3) Connect a 12 volts battery by using the battery lead wire to
the service coupler. (
12-19)
4) Measure the voltage at the wire side coupler between Br/W
and B/Br wires.
TO sensor voltage (Normal): 0.4 – 1.4 V
(
+
Br/W –
-
B/Br)
5) Also, measure the voltage when it is leaned 65° and more,
left and right, from the horizontal level.
TO sensor voltage (Leaning): 3.7 – 4.4 V
(
+
Br/W –
-
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?
“24” (P0351) IGNITION SYSTEM CIRCUIT MALFUNCTION
* Refer to the IGNITION SYSTEM for details. (
15-11)
NOTE:
After repairing the trouble, clear the DTC using SDS tool. (
12-21)
2
V
2
V
65˚
YES
• Br/W, R/Bl or B/Br wire open or shorted to
ground, or poor
2
,
C
or
N
connection.
• If wire and connection are OK, intermittent trou-
ble or faulty ECM.
• Recheck each terminal and wire harness for
open circuit and poor connection.
• Replace the ECM with a known good one, and
inspect it again.
NO
• Loose or poor contacts on the ECM coupler.
• Open or short circuit.
• Replace the TO sensor with a new one.
ECM coupler (Harness side)
2
