P1691

P1691

Check Engine Malfunction Indication Light (MIL) - Open Circuit

Function
The Check Engine MIL lights up when a fault affecting emissions is stored in the DME control module.

Diagnosis conditions
A fault is detected and stored in the memory when the engine speed is over 80 rpm and the battery voltage lies between 7.5 and 17 V.

P1691-P1693:

Wiring Diagram







Diagnosis Procedure

DTC P1691







DTC P1692







DTC P1693







1 Check wiring from DME control module to instrument cluster for continuity.

1. Connect special tool 9616 to wiring harness (DME control module connector).
2. Remove connector X 2/3.
3. Connect ohmmeter to special tool 9616, pin 8, and to X 2/3 on pin side, pin 11.
Display: 0 - 5 ohms

If Infinity ohm is displayed, check wiring harness for chafing and pinching damage.

4. Remove connector III of instrument cluster.
5. Connect ohmmeter to X 2/3 on pin side and to connector III of instrument cluster, pin 2.
Display: 0 - 5 ohms

If Infinity ohm is displayed, check wiring harness for chafing and pinching damage.

2 Check wiring from DME control module to instrument cluster for short to ground.

1. Connect special tool 9616 to wiring harness (DME control module connector).
2. Remove connector III of instrument cluster.
3. Connect ohmmeter to special tool 9616, pin 8, and ground.
Display: Infinity ohm

If 0 - 5 ohms is displayed, check wiring harness for chafing and pinching damage.

3 Check wiring from DME control module to instrument cluster for short to B+.

1. Connect special tool 9616 to wiring harness (DME control module connector).
2. Remove connector III of instrument cluster.
3. Switch on the ignition.
4. Connect voltmeter to special tool 9616, pin 8, and ground.
Display: 0 V

If battery voltage is displayed, check wiring harness for chafing and pinching damage.