Daihatsu OBD1 17 Pin DIY Diagnostic without OBD Scanner

HOW TO DIAGNOSE DAIHATSU OBD1 17 PIN WITHOUT OBD TOOLS

Trouble codes are displayed by the malfunction indicator lamp (MIL).Fig5
Switch ignition ON.
Bridge data link connector (DLC) terminals 1 and 2 Fig. 1 .
If no trouble codes are stored, the lamp will flash twice per second Fig. 2 .
Each trouble code consists of two groups of one or more flashes Fig. 3 [A].
MIL flash duration: 0,5 second Fig. 3 [B].
A 0,5 second pause separates each flash Fig. 3 [C].
A 1,5 second pause separates each trouble code group Fig. 3 [D].
A 2,5 second pause separates each trouble code Fig. 3 [E].
For example: Two 0,5 second flashes – 1,5 second pause – one 0,5 second flash. Trouble code 21 displayed Fig. 3 – heated oxygen sensor (HO2S).
Trouble codes are repeated 4 seconds after last trouble code.
Count MIL flashes. Note trouble codes. Compare with trouble code table.
Remove bridge wire.
Switch ignition OFF.
Rectify faults as necessary.

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

Flash type	Fault location	Probable cause
13	Camshaft position (CMP) sensor – no signal	Wiring, CMP sensor, ECM
21	Heated oxygen sensor (HO2S)/oxygen sensor (O2S) – range/performance problem	Wiring, HO2S/O2S, ECM
31	Manifold absolute pressure (MAP) sensor – circuit malfunction	Wiring, MAP sensor, ECM
42	Engine coolant temperature (ECT) sensor – open/short circuit	Wiring, ECT sensor, ECM
43	Intake air temperature (IAT) sensor – open/short circuit	Wiring, IAT sensor, ECM
44	AC evaporator temperature sensor – circuit malfunction	Wiring, AC evaporator temperature sensor, ECM
51	Switch signal – malfunction	Wiring, AC switch, PNP switch, TP sensor, ECM
52	Vehicle speed sensor (VSS) – circuit malfunction	Wiring, speedometer, VSS, ECM
81	Immobilizer control module – signal malfunction	Wiring, immobilizer control module, ECM
83	Immobilizer control module/engine control module (ECM) – communication malfunction	Wiring, ECM