4-56 FI SYSTEM DIAGNOSIS
– Between P wire terminal and other terminal at GP switch
coupler: infinity
• Voltage
09900-25008: Multi circuit tester set
Tester knob indication: Voltage (
)
– Between P wire or B/W wire and ground: approx. 0 V
(When ignition switch is ON)
Is check result OK?
Step 3
GP switch check
1) Turn the ignition switch OFF.
2) Measure the resistance between the P wire and B/W wire,
when shifting the gearshift lever from 1st to Top.
09900-25008: Multi circuit tester set
Tester knob indication: Resistance (
)
GP switch resistance:
Approx. 500
or more
(
+
terminal: P –
-
terminal: B/W)
Is check result OK?
2
YES
Replace the ECM with a known good one, and
inspect it again.
NO
Repair or replace the defective wire harness.
2
YES
Replace the ECM with a known good one, and
inspect it again.
NO
Replace the GP switch with a new one.
(
3-22 and 3-76)
3
