Component Location
General Description

When a driver turns on IG KEY, IG KEY ON signal is inputted to ECM connector(CDD-K) terminal 28 through IG KEY switch. This signal initializes(boots) ECM accordingly, main relay operates. Main relay supplies powers for ECM, sensors and actuators in order to enable engine to start. When IG KEY ON signal is shut off during turning engine OFF, ECM stops injector operation then engine turns OFF. Approx. after 16 sec., ECM shuts OFF main relay and system turns OFF.

DTC Description

When the condition that IG KEY ON signal turns OFF while ECM, to which IG signal inputted, is initialized (booting, Approx. 25ms is required), IG KEY switch error is recognized and P1652 is set (monitored only once every IG KEY ON initialization process). This code is due to poor connection in IG KEY ON signal circuit.

DTC Detecting Condition

Item

Detecting Condition

Possible Cause

DTC Strategy

● Voltage monitoring

● IG KEY "ON" signal circuit

● IG KEY switch

Enable Conditions

● Engine running

Threshold Value

● No signal through IG line after IG KEY "ON"

Diagnostic Time

● Immediately

Fail Safe

Fuel Cut

NO

EGR Off

NO

Fuel Limit

NO

Check Lamp

OFF

Schematic Diagram
note
To view Flash content, you need to install the appropriate browser extension
Signal Waveform
Яндекс.Метрика