[V8] '93 V8: some progress, but now new codes.

[Miller, Chris]

New codes.

2142   (00524)  G61 Knock Sensor 1 - No change in signal .  Symptom:
high fuel consumption, power loss.  Corrective measure:  tightening
torque 20 Nm, or correct open or short circuit.
---
2231   (00533)  Idle Speed Regulation - Maximum adaptation limit
exceeded.  Symptom:  idle speed too low.  Corrective measure:  Check N71
IAC valve; check G70 MAF, check G19 (also MAF?)
Could be:  IAC binding when closed.  MAF offset.  Terminal resistance at
connector of N71
---
2111  (00513)  Engine speed (RPM) sensor - no change in signal.
Symptom:  engine does not start; misfires; engine stalls.  Check sensor
and repair short or open circuit.  
Condition:  Foreign material on sensor.  Mounting base loose.  Distance
greater than 1.2mm to flywheel.  Broken teeth on flywheel.  Open
circuit/short circuit.
---
2131  (00518)  Brake light switch (F) - Open circuit, or defective
switch.  


Idle speed is low, but never stalls.  Engine starts and seems to run
fine, with the check engine light occasionally coming on.  I cleaned the
knock sensor harness connector yesterday; no effect.  I cleaned out the
IAC valve, and found some corrosion in the lower pin of the connector.
Cleaned that too; no effect.  

Next step is to figure out where the ECU is located (under driver's side
dash?) and clean the connector there.  Then figure out the knock sensor
issue, then find the connector for the RPM sensor (sounds like it is
driver's side near the O2 sensor connector).  Then look at/swap out the
brake light switch.



---
Chris Miller
Training Development
[i] The Information Foundry at Robert Bentley, Inc.
Tel: 617.528.4113
Cell: 617.875.3792
mailto:chris.miller at infofoundry.com
http://www.infofoundry.com