Hand-held tester:
- CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P1121)
- Connect the hand-held tester to the DLC3.
- Turn the power switch ON (IG).
- Turn the hand-held tester ON.
- On the hand-held tester, select the item: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
- Read DTCs.
Result:
SCAN TOOL VALUES DESCRIPTIONDisplay (DTC Output) Proceed to P1121 A P1121 and other DTCs B HINT:
If any other codes besides P1121 are output, perform troubleshooting for those DTCs first.
- B: GO TO RELEVANT DTC CHART (See DIAGNOSTIC TROUBLE CODE CHART )
- A: GO TO NEXT STEP
- PERFORM ACTIVE TEST BY HAND-HELD TESTER
- Connect the hand-held tester to the DLC3.
- Turn the power switch ON (IG).
- Turn the hand-held tester ON.
- Put the engine in inspection mode (See PRECAUTION ).
- Start the engine and warm it up.
- Select the items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / WATER FLW VLV3, WATER FLW VLV4 or WATER FLW VLV5.
- Measure the voltage between terminals WBAD and E2 of the ECM connector.
Standard:
TESTER CONNECTION SPECIFIED CONDITION DESCRIPTIONTester Operation Specified Condition "WATER FLW VLV 3" ON Approximately 2.5 V "WATER FLW VLV 4" ON Approximately 3.5 V "WATER FLW VLV 5" ON Approximately 4.5 V
- NG: REPLACE WATER W/BRACKET VALVE ASSY
- OK: GO TO NEXT STEP
- CHECK COOLING SYSTEM (CHECK FOR CLOGGING IN THE COOLANT SYSTEM)
OK: Coolant passages are not clogged.
- NG: REPAIR OR REPLACE COOLING SYSTEM
- OK: GO TO NEXT STEP
REPLACE ECM (See ECM (1NZ-FXE) )