CS35 2013.04
3.1.13-203 3.1.13-203Electronic Control System - ME7
DTC P0481 and P0694
1. DTC Description
2. Possible Sources
3. Diagnosis Procedures
Refer to: Electronic Fan High Speed Not Run Diagnosis (3.1.4 Cooling System, Symptom
Diagnosis and Testing).
Fault Code Description Definition
P0481
Cooling fan relay control circuit
open circuit (high speed)
Cooling fan high and low - speed relay coil operating
power is supplied by the main relay that controlled
by ECM, ECM control the work of relay through ter-
minal 68 of ECM wiring harness connector E01.
There is a drive circuit control relay coil equipped
within the ECM for grounding.
Drive circuit equips a feedback circuit for ECM, ECM
determine the control circuit’s open, grounding short
circuit or voltage short circuit through monitoring the
feedback voltage.
P0694
Cooling fan relay control circuit
voltage is too high (high speed)
Fault
Code
Test Tactics
Setting Conditions (Control
Strategy)
Fault
P0481
Hardware circuit
inspect
Open circuit
• Circuit
• Relay and fuse
• Fan motor
P0694 Short circuit to power supply
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