Suzuki OBD 1 Diagnostic Guide

HOW TO READ SUZUKI OBD1 CODES (5 PIN DLC) WITHOUT OBD SCANNER
HOW TO READ SUZUKI OBD1 CODES (5 PIND DLC)  WITHOUT OBD SCANNER

 

Preparatory conditions

  • Ensure battery voltage above 11 volts.
  • Transmission in neutral.
  • All auxiliary equipment, including air conditioning, switched OFF.

 

Accessing trouble codes

  • Trouble codes are displayed by the malfunction indicator lamp (MIL).
  • Switch ignition ON.
  • Check that MIL illuminates.
  • Bridge data link connector (DLC) terminals B and D Fig. 1 .
  • Count MIL flashes. Note trouble codes.FIG.3  Compare with trouble code table.(FIG.2)
  • Each trouble code consists of two groups of one or more flashes.
  • A 1,5 second pause separates each trouble code group.
  • A 3 second pause separates each trouble code.
  • MIL flash duration: 0,3 second.
  • For example: Two 0,3 second flashes – 1,5 second pause – one 0,3 second flash. Trouble code 21.
  • Remove bridge wire.
  • Switch ignition OFF.

 

Erasing trouble codes

  • Ensure ignition switched OFF.
  • Disconnect battery earth lead for 20 seconds minimum.
  • Reconnect battery earth lead.
  • Run engine until it reaches normal operating temperature.
  • Repeat checking procedure to ensure no data remains in ECM fault memory.

WARNING: Disconnecting the battery may erase memory from electronic units (e.g. radio, clock).

 

OBD1 CODES

Trouble code

Fault location

Probable cause

12No fault found
13Heated oxygen sensor (HO2S) – circuit malfunctionWiring, HO2S, ECM
14Engine coolant temperature (ECT) sensor – circuit malfunctionWiring, ECT sensor, ECM
15Engine coolant temperature (ECT) sensor – signal malfunctionWiring, ECT sensor, ECM
21Throttle position (TP) sensor – signal voltage highWiring, TP sensor, ECM
22Throttle position (TP) sensor – signal voltage lowWiring, TP sensor, ECM
23Intake air temperature (IAT) sensor – circuit malfunction/intermittent voltage highWiring, IAT sensor, ECM
24Vehicle speed sensor (VSS) – signal malfunctionWiring, VSS, ECM
25Intake air temperature (IAT) sensor – circuit malfunction/intermittent voltage lowWiring, IAT sensor, ECM
31Manifold absolute pressure (MAP) sensor – signal voltage lowWiring, MAP sensor, ECM
32Manifold absolute pressure (MAP) sensor – signal voltage highWiring, MAP sensor, ECM
33Mass air flow (MAF) sensor – signal voltage highWiring, MAF sensor, ECM
34Mass air flow (MAF) sensor – signal voltage lowWiring, MAF sensor, ECM
41Ignition fail safe signal – circuit malfunctionWiring, noise suppressor, ignition control module (ICM), ECM
42Crankshaft position (CKP) sensor/camshaft position (CMP) sensor
– signal malfunction
Wiring, CKP/CMP sensor, ECM
44Closed throttle position (CTP) switch – signal malfunctionWiring, CTP switch, ECM
45Closed throttle position (CTP) switch – signal malfunctionWiring, CTP switch, ECM
51Exhaust gas recirculation (EGR) solenoid – circuit malfunctionWiring, EGR solenoid, ECM
52Injector leak/heated oxygen sensor (HO2S) – circuit malfunctionWiring, injector/HO2S, ECM
Light remains ONEngine control module (ECM)ECM

By erwincsalarda

Hello, my name is Erwin Salarda, and I'm from the Philippines. My main interests are computers and automobiles, and I am very enthusiastic about learning new things in life. Everything on my website was created with the intention of sharing it with you.