216 CAN Timeout, PSM - Signal Implausible

P1600

216 CAN Timeout, PSM - Signal Implausible

Function
The CAN bus is a data transmission system specially developed for use in the vehicle. The CAN bus is bidirectional, i.e. each ECM connected to it can both send and receive.

The CAN bus consists of a twisted two-core wire.

A CAN timeout means that the PSM control module was unable to establish a connection with the DME control module.

Diagnosis conditions
- Vehicle has PSM
- Battery voltage greater than 7 V
- Engine running

P1600:

Wiring Diagram







Diagnosis Procedure







1 Check CAN bus from DME control module to PSM control module for continuity.
1. Remove DME control module connector.
2. Remove PSM control module connector.
3. Connect special tool 9637 to wiring harness (DME control module connector).
4. Connect ohmmeter to special tool 9637, pin IV/36, and to PSM control module connector, pin 61.

Display: 0 - 5 ohms

5. Connect ohmmeter to special tool 9637, pin IV/37, and to PSM control module connector, pin 63.

Display: 0 - 5 ohms

NOTE: The wires are routed via two connectors.

If infinity ohms is displayed, check wiring harness for chafing and pinching damage.

2 Check CAN bus from DME control module to PSM control module for short to ground.
1. Remove DME control module connector.
2. Remove PSM control module connector.
3. Connect special tool 9637 to wiring harness (DME control module connector).
4. Connect ohmmeter to special tool 9637, pin IV/36, and ground.

Display: infinity ohms

5. Connect ohmmeter to special tool 9637, pin IV/37, and ground.

Display: infinity ohms

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

3 Check CAN bus from DME control module to PSM control module for short to B+.
1. Remove DME control module connector.
2. Remove PSM control module connector.
3. Connect special tool 9637 to wiring harness (DME control module connector).
4. Connect voltmeter to special tool 9637, pin IV/36, and ground.

Switch on the ignition.
Display: 0 V

5. Connect voltmeter to special tool 9637, pin IV/37, and ground.

Switch on the ignition.
Display: 0 V

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

4 Check CAN bus from DME control module to PSM control module for short circuit.
1. Remove DME control module connector.
2. Remove PSM control module connector.
3. Connect special tool 9637 to wiring harness (DME control module connector).
4. Connect ohmmeter to special tool 9637, pins IV/36 and IV/37.

Display: infinity ohms

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