Checking Components And Wiring

Check the wiring for short-circuiting to each other.

Check between:

• Engine control module (ECM) #A92 (#B32) and lambda probe #2 (wiring for calibration current).
• Engine control module (ECM) #A68 (#B8) and lambda probe #6 (wiring for pump current).

Check the cable for an open-circuit.

Check between:

• Engine control module (ECM) #A91 (#B31) and lambda probe #5.
• Engine control module (ECM) #A92 (#B32) and lambda probe #2 (wiring for calibration current).

Remedy as necessary.

Other information 

• see CONNECTING THE BREAKOUT BOX
• see SIGNAL SPECIFICATION
• see OXYGEN SENSOR (CATALYST MONITOR SENSOR)
• see CHECKING WIRING AND TERMINALS

Fig 1: Identifying Front Heated Oxygen Sensor Connector Terminals

Courtesy of VOLVO CARS CORPORATION

Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA (Volvo Scan Tool)

Courtesy of VOLVO CARS CORPORATION

Fig 3: Front Heated Oxygen Sensor

Courtesy of VOLVO CARS CORPORATION

Refer to VERIFICATION