HOW TO Diagnose Suzuki OBD1 6 Pin without OBD Scanner

Suzuki OBD 1 Diagnostic Guide

HOW TO DIAGNOSE SUZUKI 6 PINS OBD1

HOW TO DIAGNOSE SUZUKI 6 PINS OBD1

 

Accessing Code

  • Trouble codes are displayed by the malfunction indicator lamp (MIL).
  • Switch ignition ON.
  • Check that MIL illuminates.
  • Bridge data link connector (DLC) terminals 1 and 2 Fig. 1 .
  • Count MIL flashes. Note trouble codes. Compare with trouble code table.
  • If MIL remains illuminated: Suspect faulty engine control module (ECM).
  • Each trouble code consists of two groups of one or more flashes.
  • A 1 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 second pause – one 0,3 second flash. Trouble code 21 displayed Fig. 2 .
  • Remove bridge wire.
  • Switch ignition OFF.

Erasing code

  • Ensure ignition switched OFF.
  • Disconnect battery earth lead for 60 seconds minimum.

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

  • Run engine until it reaches normal operating temperature.
  • Repeat checking procedure to ensure no data remains in ECM fault memory.

NOTE: Battery earth lead removal duration depends on ambient temperature. The lower the temperature the longer the battery earth lead must be removed. The process may not be successful, if the temperature is below 0°C (32°F). Locate a workplace with a higher temperature before attempting to erase trouble codes.

 

List of OB1 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
Flash codeFault locationProbable 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
Intake air temperature (IAT) sensor – circuit malfunction/intermittent
23Wiring, IAT sensor
voltage high
24Vehicle speed sensor (VSS) – signal malfunctionWiring, VSS, ECM
Intake air temperature (IAT) sensor – circuit malfunction/intermittent
25Wiring, IAT sensor
voltage low
31Manifold absolute pressure (MAP) sensor – signal voltage lowWiring, MAP sensor
32Manifold absolute pressure (MAP) sensor – signal voltage highWiring, MAP sensor
42Crankshaft position (CKP) sensor – signal malfunctionWiring, CKP sensor, ECM
47Camshaft position (CMP) sensor – signal malfunctionWiring, CMP sensor, ECM
61Shift solenoid (SS) A – circuit malfunctionWiring, shift solenoid (SS), ECM
62Shift solenoid (SS) A – signal malfunctionWiring, shift solenoid (SS), ECM
63Shift solenoid (SS) B – circuit malfunctionWiring, shift solenoid (SS), ECM
64Shift solenoid (SS) B – signal malfunctionWiring, shift solenoid (SS), ECM
72Transmission range (TR) switch – range/performance problemWiring, TR switch, ECM
Engine control module (ECM)/immobilizer control module – ECMProgramming error, immobilizer control module,
81
identification mismatchECM
82Engine control module (ECM) – internal failureECM
Wiring, open circuit/short circuit, immobilizer
83Immobilizer control module – circuit malfunction
control module, ECM
84Engine control module (ECM) – programming errorCarry out ECM programming