NOTE: This information does not apply to carberated engines, as they will have a check engine light but don't store codes, so
you have to troubleshoot manually to determine which sensor is causing the problem.
DTCs may be accessed by installing a spare fuse into the fuse box diagnostic terminal, located under the LH side of the instrument panel, then turning the ignition On.
Reading trouble codes
The instrument panel Check Engine lamp displays the DTCs. In normal operation the lamp will light when the ignition is turned
On. However, two different lamp functions can occur when the engine is started. The lamp may turn off immediately, indicating there is no fault at that time, or stay lit, informing the vehicle operator that there is a system failure. If the lamp stays lit a DTC will be stored in the ECM memory. When a DTC is accessed from the ECM memory the Check Engine lamp will flash in a series, indicating the DTC number. When multiple system failures occur applicable DTCs will be indicated three times each.
DTCs will continue to flash as long as the ignition is On, and the diagnostic switch terminals are grounded.
Clearing Codes
DTCs may be erased by disconnecting and isolating the battery ground cable for more than 60 seconds, or after 50 key cycles if the malfunction has not recurred.
89–95 SIDEKICK & SAMURAI w/TBI FUEL INJECTION
12 All Clear (No Fault Detected)
13 O2 Sensor circuit
14 Coolant Temperature Sensor Circuit
15 Coolant Temperature Sensor Circuit
21 Throttle Position Sensor Circuit
22 Throttle Position Sensor Circuit
23 Intake Air Temperature Sensor Circuit
24 Vehicle Speed Sensor Circuit
25 Intake Air Temperature Sensor Circuit
31 Atmospheric Pressure Sensor Circuit
32 Atmospheric Pressure Sensor Circuit
41 Ignition Signal Circuit
42 Crank Angle Sensor Circuit
44 Idle Switch Sensor Circuit
45 Idle Switch Sensor Circuit
51 EGR System & Recirculated Exhaust Gas Temperature Sensor
53 Ground Circuit
54 Fifth Gear Switch Circuit
71 Test Switch Circuit
ON ECM failure