On Board Diagnostic

P0332

Knock Sensor 2 - Below Limit

Function
The knock control system is designed to detect knocking combustion and to retard the ignition timing for the knocking cylinder(s). When no more knocking combustion occurs, the ignition timing is advanced again gradually to the specified value. Because of the engine design (opposed-cylinder engine), two knock sensors are needed.
Knock sensor 2 - cylinders 4 to 6

Diagnosis conditions
- Engine speed more than 2800 rpm
- Engine load greater than 30 %

P0332:

NOTE: When a fault is stored, the ignition angle is retarded for all cylinders in the range in which knock control is active. Knock control adaptation is inactive. If knock control becomes active here, this may indicate engine damage (increased noise level).

Wiring Diagram







Diagnosis Procedure







1 Check wiring from DME control module, pins III/36 and III/37, to knock sensor 2 for continuity.
1. Remove connector of knock sensor 2.
2. Connect special tool 9637 to wiring harness (DME control module connector).
3. Connect ohmmeter to special tool 9637, pin III/36, and to connector of knock sensor 2, pin 1.
Display: 0 - 5 ohms

4. Connect ohmmeter to special tool 9637, pin III/37, and to connector of knock sensor 2, pin 2.
Display:

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

2 Check wiring from DME control module, pin III/36, to knock sensor 2 for short to ground.
1. Remove connector of knock sensor 2.
2. Connect special tool 9637 to wiring harness (DME control module connector).
3. Connect ohmmeter to special tool 9637, pin III/36, and ground.
Display: infinity ohms

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

3 Check wiring from DME control module, pin III/36, to knock sensor 2 for short to B+.
1. Remove connector of knock sensor 2.
2. Connect special tool 9637 to wiring harness (DME control module connector).
3. Connect voltmeter to special tool 9637, pin III/36, and ground.
Display: 0 V

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