JLG 660SJ Service Manual - Manual (Page 134)

SECTION 3 - CHASSIS & TURNTABLE
3-90 – JLG Lift – 3121298
Engine Control Module Replacement
REMOVAL
1. Disconnect Negative battery cable.
2. Remove controller from mounting bracket.
3. Push connector lock back to unlock connector.
4. Unplug and remove controller.
INSTALLATION
CONTROLLER IS CALIBRATED FOR EACH ENGINE. VERIFY YOU HAVE CORRECT
CONTROLLER.
1. Plug connector into controller.
2. Push lock into place.
3. Mount controller into mounting bracket.
4. Reconnect the battery cable.
5. Start engine.
6. Check and clear any DTC codes.
7. Verify engine is in closed loop and no warning lights are
illuminated.
Heated Exhaust Gas Oxygen Sensor Replacement
REMOVAL
1. Disconnect negative (-) battery cable.
2. Disconnect O2 sensor electrical connector.
3. Using an O2 Sensor socket, remove and discard Sensor.
INSTALLATION
LUBRICATE O2 SENSOR THREADS WITH ANTI-SEIZE COMPOUND GM P/N
5613695 OR EQUIVALENT BEFORE INSTALLATION. DO NOT GET COMPOUND
ON SENSOR TIP.
1. Install O2 sensor. Tighten to 30 lb-ft (41 Nm).
2. Start engine.
3. Check and clear any DTC codes.
4. Verify engine is in closed loop and no warning lights are
illuminated.