Code No. B1116 Electric water pump harness error






















DIAGNOSIS CODE SET CONDITIONS




  • While the heater water pump assembly drive ON, the F/B signal turns OFF for 3 seconds.
  • While the heater water pump assembly drive OOFF, the F/B signal turns ON for 3 seconds.

PROBABLE CAUSES



  • Malfunction of heater water pump relay
  • Damaged harness wires and connectors
  • Malfunction of compressor & heater controller

DIAGNOSIS PROCEDURE

STEP 1. Connector check: A-114X heater water pump relay connector

Q. Is the check result normal?
Go to Step 2.
Repair the damaged connector.

STEP 2. Check the heater water pump relay.
Refer to .

Q. Is the heater water pump relay in good condition?
Go to Step 3.
Replace the heater water pump relay.

STEP 3. Measure the voltage at A-114X heater water pump relay connector.
(1)Disconnect the connector, and measure at the wiring harness side.
(2)Voltage between terminal 4 and body earth
OK: Battery voltage

Q. Is the check result normal?
Go to Step 5.
Go to Step 4.

STEP 4. Check the wiring harness between A-114X heater water pump relay connector terminal No. 4 and the fusible link (2).

  • Check the power supply line for open circuit.

Q. Is the check result normal?
Intermittent malfunction. Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points, - How to Cope with Intermittent Malfunctions .)
Repair the wiring harness.

STEP 5. Measure the resistance at A-109 heater water pump assembly connector.
(1)Disconnect the connector, and measure at the wiring harness side.
(2)Resistance between terminal No. 2 and body earth
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?
Go to Step 7.
Go to Step 6.

STEP 6. Check the wiring harness between A-109 heater water pump assembly connector terminal No. 2 and the body earth.

  • Check the earth wires for open circuit.
note Before checking the wiring harness, check the earth connector B-124 and repair it if necessary.

Q. Is the check result normal?
Intermittent malfunction. Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points, - How to Cope with Intermittent Malfunctions .)
Repair the wiring harness.

STEP 7. Check the wiring harness between A-114X heater water pump relay connector terminal No. 2 and B-305 junction block connector terminal No. 9.

  • Check the power supply line for open circuit.

Q. Is the check result normal?
Go to Step 8.
Repair the wiring harness.

STEP 8. Connector check: C-101, C-113 compressor & heater controller connectors

Q. Is the check result normal?
Go to Step 9.
Repair the damaged connector.

STEP 9. Check the wiring harness between A-114X heater water pump relay connector terminal No. 1 and C-101 compressor & heater controller connector terminal No. 7.

  • Check the power supply line for open circuit.
note Before checking the wiring harness, check the intermediate connector B-27 and repair it if necessary.

Q. Is the check result normal?
Go to Step 10.
Repair the wiring harness.

STEP 10. Check the wiring harness between A-114X heater water pump relay connector terminal No. 3 and A-109 heater water pump assembly connector terminal No. 1.

  • Check the power supply line for open circuit.

Q. Is the check result normal?
Go to Step 11.
Repair the wiring harness.

STEP 11. Check the wiring harness between A-109 heater water pump assembly connector terminal No. 1 and C-113 compressor & heater controller connector terminal No. 29.

  • Check the input line for open circuit.
note Before checking the wiring harness, check the intermediate connector B-27 and repair it if necessary.

Q. Is the check result normal?
Go to Step 12.
Repair the wiring harness.

STEP 12. Check whether the diagnosis code is reset.

Q. Is the diagnosis code set?
Replace the compressor & heater controller.
Intermittent malfunction. Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points, - How to Cope with Intermittent Malfunctions .)