Mechanics

NO SPARK, CODE P1300

1996 Toyota Camry

Computer problem
1996 Toyota Camry 4 cyl Two Wheel Drive Automatic 250000 miles

Car stalled at hwy speed, was able to restart 1x with repeated cranking, stalled immediate and am now troubleshooting cold wiithout spark and code 1300; CPS, and pick-up sensor test within range as well as coil; Did try new coil, and 2nd igniter(used) with no result; Power at coil and igniter; Distributor turns freely; Have checked connections and all appear ok. Do have multimeter and test light ; Tested negative side of coil with light while cranking and saw only dim light, no pulse; Have not checked igniter plug for pulse; Pick-up sensor plug has 2 pin connector; Igniter outer wires w, wr I believe are igt and igf signal; Is it possible for me to get a good test for igt signal from plug? And also good test at pick-up plug to confirm voltage? Thanks, Ray
Avatar
Rdn49
January 22, 2009.




Hi
try these tests
Disconnect Black 5 pin igniter connector acess ECM behind glove box. With ignition on measure voltage between ground and term. # 3 white/red wire at ECM E 11 connector. Voltage should be 4.5 to 5.5V if not replace igniter if not replace ECM.
Next test Back probe trem. #20 white wire at ECM 11 and ground while cranking if voltage is not.1 to 4.5 replace ECM
Hope this helps
Thanks for donate
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Docfixit
Jan 22, 2009.
Thanks for prompt reply; I did check voltage at ECM with igniter connector unplugged and all else plugged and got 5V #3 and.6 #20 while cranking. All components under hood are OE and have not been able to check air gap on distr, as I do not have proper guage. Thanks, Ray

Tiny
Rdn49
Jan 22, 2009.
Hi Ray
Check for open or short to ground on these two circuits
IGF on ECM connector E12 terminal 3 white/red wire and IGF on igniter term 1
IGT on ECM connector E12 term 6 white wire and igniter term 2
Let me know
Check air gap with match book cover.012

Docfixit
Jan 22, 2009.
Really appreciate your patience and help; Am I checking each circuit by test probing at disconnected ecm connector and to ground with igniter connected and battery disconnected? Feel air gap is within range; Do notice clicking sound while turning by hand but assume this is normal pu sound. Thanks Doc

Tiny
Rdn49
Jan 22, 2009.
Hi Ray,

Have you solved the problem?

KHLow2008
Feb 9, 2009.
Thanks for reply, No have not solved, still stumped; Did try rebuilt distr, no action; verified signal from crank sensor, igt voltage is very low? Found ecm online with matching numbers and ordered but was cancelled, apparently not available now. Ray

Tiny
Rdn49
Feb 9, 2009.
Hi Ray,

Sorry for the delay in replying.

Yes, seems the ECM or its wiring is at fault. I do have the completed diagnostic procedures her, go through them again and see if you get any different results.

DTC P1300 - IGNITER CIRCUIT MALFUNCTION

CAUTION: If ECM replacement is instructed in following testing, always ensure ECM connectors and ground circuit are okay. If either are suspect, repair and repeat testing to confirm ECM malfunction.

Circuit Description The ECM uses pick-up coil input signals to switch primary ignition circuit on and off. Primary circuit is turned off when ECM delivers a signal to igniter on the IGT wire, causing ignition coil to fire spark plug. After delivering a command to turn off primary circuit on IGT wire, the ECM monitors IGF circuit to ensure primary switching occurred. DTC is set when there is no IGF signal to ECM for 4 consecutive IGT signals during engine operation. Possible causes are:

IGF or IGT open or short circuit from igniter to ECM.
Igniter
ECM

Diagnosis & Repair

1. Check for spark at misfiring cylinder. If spark is present, go to next step. If spark is not present, go to step 4 .

2. Check for open or short in IGF circuit between ECM and igniter. Igniter is located near left shock tower. See appropriate wiring diagram in WIRING DIAGRAMS. Repair as necessary. If circuit is okay, go to next step.

3. Disconnect Black 5-pin igniter connector. Access ECM behind glove box. Turn ignition on. Measure voltage between ground and terminal No. 3 (White/Red wire) at ECM "E11" connector. See Fig. 3 . If voltage is 4.5-5.5 volts, replace igniter. If voltage is not 4.5-5.5 volts, replace ECM and retest.


http://www.2carpros.com/forum/automotive_pictures/192750_ECM96CAmry_1.jpg



4. Check for open or short in IGT circuit (White wire) between ECM and igniter. Repair as necessary. If circuit is okay, go to next step.

5. Access ECM behind glove box. Locate ECM "E11" connector. See Fig. 3 . Backprobing ECM connector, measure voltage between ground and terminal No. 20 (White wire) at ECM "E11" connector while cranking engine. If voltage is .1-4.5 volts, go to next step. If voltage is not .1-4.5 volts, replace ECM and retest.

6. Disconnect Black 5-pin igniter connector. Backprobing ECM connector, measure voltage between ground and terminal No. 20 (White wire) at ECM "E11" connector while cranking engine. If voltage is .1-4.5 volts, go to next step. If voltage is not .1-4.5 volts, replace ECM and retest.

7. Turn ignition on. Measure voltage between ground and terminal No. 3 (White/Red wire) at igniter wiring harness connector. See Fig. 8 . If voltage is 9-14 volts, go to next step. If voltage is not 9- 14 volts, check and repair igniter power source circuit. See appropriate wiring diagram in WIRING DIAGRAMS article.


http://www.2carpros.com/forum/automotive_pictures/192750_IgniterTerminal96Camry_1.jpg



8. Check for an open or short in wiring harness between ignition switch and ignition coil, and between ignition coil and igniter. Repair as necessary. If wiring is okay, go to next step.

9. Check ignition coil. See IGNITION CHECKS (DISTRIBUTOR TYPE IGNITION SYSTEM) in BASIC TESTING - 2.2L article. Replace coil as necessary. If coil is okay, replace igniter.

KHLow2008
Feb 11, 2009.
Wanted to thank you for your followup; Finally received reconditioned ecm, and did solve the problem; Car started immediate and runs very well at 251k miles. Wonder if Washington really knows what happens on mainstreet? Ray

Tiny
Rdn49
Mar 5, 2009.
Hi Ray,

Thanks for the input and glad you have solved your problem.

If Washington knows what is happening on mainstreet, what can or would they do? ; )

Have a nice day.

KHLow2008
Mar 5, 2009.

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