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4-84 FI SYSTEM DIAGNOSIS
Is the FP relay OK?
4) After repairing the trouble, clear the DTC using SDS tool.
(4-27)
Step 1 (When indicating P0230-H:)
1) Turn the ignition switch OFF.
2) Lift and support the fuel tank. (5-3)
3) Check the FP relay coupler for loose or poor contacts.
If OK, then check the FP relay. (5-7)
Is the FP relay OK?
4) After repairing the trouble, clear the DTC using SDS tool.
(4-27)
YES
• Y/B or O/W wire open or short or poor ] con-
nection
• Y/R or R/Bl wire open, shorted or poor W con-
nection
• 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 Replace the FP relay with a new one.
When using the multi-circuit tester, do not storongly
touch the terminal of the ECM coupler with a needle
pointed tester probe to prevent the terminal damage
or terminal bend.
ECM couplers (Harness side)
1
(Black) (Gray)
1
YES
• Y/R wire shorted to power source
• Y/B wire shorted to ground
• 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 Replace the FP relay with a new one.
ECM couplers (Harness side)
1
(Black) (Gray)