Nissan Skyline R32 Exhaust gas sensor monitor mode switching display
 
1  Set the Nissan Skyline R32 ignition switch to "ON". Use a lead line to short CHK pin and IGN pin of diagnosis connector for more than two seconds to switch mode.
(Otherwise turn ignition switch to "ON" and turn adjustment volume on side of the ECCS control unit to the right (CW) until it stops at self-diagnosis mode switching position (B) for more than two seconds and then return volume to original position.)
 
Nissan Skyline R32 Exhaust gas sensor monitor mode switching display
 
2  After warming the Nissan Skyline R32 engine adequately, raise the engine speed until the exhaust gas temperature warning lamp (or the red lamp on side of control unit) flashes (the flashing will start above approximately 2,000 rpm). The rear exhaust gas sensor output monitor mode will be set. 
CAUTION:
The accelerator pedal must be pressed intentionally during idling to perform the inspection because the air-fuel ratio feedback control is stopped.
3  Make sure the Nissan Skyline R32 exhaust gas temperature warning lamp or red lamp on the side of the control unit flashes in this condition.
4  Short CHK pin and IGN pin of the diagnosis connector for more than two seconds one more time to release the mode. (Otherwise, turn the adjustment volume on side ECCS control unit to the right (CW) until it stops at self-diagnosis mode switching position (B) for more than two seconds and then return volume to original position.) After the exhaust gas temperature warning lamp (or red lamp on control unit side) flashes two times, the mode switches to the front exhaust gas sensor output monitor mode.
5  Make sure that the exhaust gas temperature warning lamp (or red lamp on side of control unit) flashes at about 2,000 rpm.
Note: Refer to the corresponding section for details about air/fuel ratio feedback monitor.
Note: When switching the exhaust gas sensor output monitor from the No. 1-3 cylinder bank to No. 4-6 cylinder bank, adjust the diagnosis connector (or control unit adjustment volume). The signal pattern is shown in the diagrams.