Grand Vitara
NOTE:
Perform all voltage and resistance tests using a Digital Volt-Ohm Meter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test procedure. Use ohmmeter to isolate wiring harness shorts or opens.
- Using a mechanic's stethoscope, check each fuel injector for operating "clicking" sound as engine is cranked or running. See Figure . If all fuel injectors made operating sound, go to next step. If any one or all fuel injectors do not make operating sound, go to step 3 .
- Turn ignition switch to LOCK position, Disconnect ECM 28-pin harness connector C51-2. ECM is located under instrument panel, behind glove box. See Figure
. Using DVOM, measure resistance at specified circuit between ECM connector terminals. See CHECKING FUEL INJECTOR CIRCUIT RESISTANCE
table. See Fig 1
. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Resistance should be 10-14 ohms. If resistance is not as specified, go to next step. If resistance is as specified, fuel injector circuit is okay.CHECKING FUEL INJECTOR CIRCUIT RESISTANCE
ECM Connector/Terminal (Wire Color) ECM Connector/Terminal (Wire Color) C51-2/7 (Pink) C51-2/20 (Blue/Black) C51-2/6 (Pink/Black) C51-2/20 (Blue/Black) C51-2/19 (Pink/Green) C51-2/20 (Blue/Black) C51-2/18 (Pink/Blue) C51-2/20 (Blue/Black) C51-2/28 (Gray/Green) C51-2/20 (Blue/Black) C51-2/27 (Gray/Black) C51-2/20 (Blue/Black) - Connect ECM connector. Turn ignition switch to ON position. Backprobe and measure voltage between ground and specified ECM connector and terminal. See CHECKING CIRCUITS BETWEEN FUEL INJECTOR & ECM
table. See Fig 1
. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. If voltage is 10-14 volts, substitute ECM with known good module. See ENGINE CONTROL MODULE
under COMPUTERIZED ENGINE CONTROLS in REMOVAL & INSTALLATION article. If voltage is less than 10 volts, repair open circuit in Blue/Black wire between fuel injector and ECM. After repair, retest system for normal operation.CHECKING CIRCUITS BETWEEN FUEL INJECTOR & ECM
ECM Connector Terminal No. Wire Color C51-2 7 (Pink) C51-2 6 (Pink/Black) C51-2 19 (Pink/Green) C51-2 18 (Pink/Blue) C51-2 28 (Gray/Green) C51-2 27 (Gray/Black)