Esteem (1.6L)
- Turn ignition on. Backprobing at ECM, measure voltage between ground and ECM connector E92 terminal No. 19 (Light Green/Black wire). See Fig 1
. With A/C and blower switch Off, voltage should be 10-14 volts. With A/C and blower switch On, voltage should about zero volt. If voltage readings are as specified, go to next step. If voltage readings are not as specified, check for open or short in Light Green/Black wire between ECM and A/C control module. See WIRING DIAGRAMS
article. If no problem with wiring is found, check for A/C malfunction. See appropriate MANUAL or AUTOMATIC A/C-HEATER SYSTEMS article in AIR CONDITIONING & HEATING.
- Turn ignition on. Backprobing at ECM, measure voltage between ground and ECM connector E92 terminal No. 17 (Green/Red wire). With A/C and blower switch Off, voltage should be about zero volt. With A/C and blower switch On, voltage should be 10-14 volts. If voltage readings are as specified, A/C circuit s are okay. If voltage readings are not as specified, go to next step.
- Check for open or short in Green/Red wire between A/C amplifier and ECM. See Fig 2
. Also, check for poor performance of ECT sensor, TP sensor, engine start signal input to ECM. For testing procedures, see appropriate DTC testing procedure in SELF DIAGNOSTICS - ESTEEM 1.6L article. If problem is found, repair as necessary. After repair, retest system. If no problem with wiring or sensors is found, substitute ECM with known good unit and retest system.
Courtesy of SUZUKI OF AMERICA CORP.
Courtesy of SUZUKI OF AMERICA CORP.