Last Modified: 7-3-2017 6.8:8.0.40 Doc ID: RM0000018MZ004X
Model Year Start: 2007 Model: LX470 Prod Date Range: [08/2006 -           ]
Title: AIR CONDITIONING: AIR CONDITIONING SYSTEM: 14; Engine Coolant Temperature Communication Circuit; 2007 MY LX470 [08/2006 -        ]

DTC

14

Engine Coolant Temperature Communication Circuit

DESCRIPTION

This sensor detects the engine coolant temperature and sends the appropriate signals to the ECM. These signals are used for warm up control when the engine is cold.

DTC No.

Detection Item

Trouble Area

14

Open or short in engine coolant temperature sensor circuit
  • Engine coolant temperature sensor
  • Harness or connector between engine coolant temperature sensor and ECM
  • Harness or connector between ECM and A/C amplifier
  • ECM
  • A/C amplifier

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

CHECK FOR DTC

(a) Is DTC P0115, P0117 or P0118 output?

YES

Go to ENGINE TROUBLESHOOTING

NO

2.

CHECK WIRE HARNESS (ECM - AIR CONDITIONING AMPLIFIER)
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

REPLACE AIR CONDITIONING AMPLIFIER