Esteem (1.8L)
WARNING: This page is about a different car, the 2002 Suzuki XL-7, 2002 Suzuki Vitara, 2002 Suzuki Grand Vitara, 2002 Suzuki Esteem, and 2002 Suzuki Aerio. However, it is still accessible from the selected car via links, so may be relevant.
- Turn ignition on. Backprobing at ECM, measure voltage between ground and ECM connector E92 terminal No. 28 (Light Green/Black wire). See Figure . With A/C and blower switch Off, voltage should be 10-14 volts. With A/C and blower switch On, voltage should be 0-1.5 volts. 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. 9 (Green/Red wire). With A/C and blower switch Off, voltage should be 0-1 volts. 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 1 . 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 1.8L 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.