Archive & reference hub
MK3 / A70 markets
Manuals, parts, data

Troubleshooting assistant

Pick a problem area, choose the symptom, then follow the remedy links or step-by-step TSRM procedure.

Diagnostic codes
Searching in 1990 USDM TSRM.
Areas /Engine overheats
Engine Mechanical

Engine overheats

Engine temperature is too high or overheating.

Possible causes and remedies
Possible cause
Cooling system faulty
Remedy
Troubleshoot cooling system
CO-4
Possible cause
Incorrect ignition timing
Remedy
Reset timing
IG-20
A70 knowledge graph
Automatically linked from codes, vehicle context and archive references.
Search related
TSRM / TEWD
EM-40 — Engine Mechanical - EM-40
1990 USDM TSRM · EM Engine Mechanical · 1990 · North America
Same vehicle / manual context
TSRM / TEWD
EM-41 — Engine Mechanical - EM-41
1990 USDM TSRM · EM Engine Mechanical · 1990 · North America
Same vehicle / manual context
Troubleshooting assistant
Rough idle, stalls or misses
EM · Engine Mechanical
Same vehicle / manual context
Troubleshooting assistant
Engine hesitates / poor acceleration
EM · Engine Mechanical
Same vehicle / manual context
ECU pinouts
1986 7M-GTEU ECU pinout
7M-GTEU · 1986 7M-GTEU ECU
Related archive content
ECU pinouts
1987 7M-GTE ECU pinout - early A70
7M-GTE · 1987 7M-GTE early ECU
Related archive content
Forum discussions
New Member
Introductions · Welcome
Related archive content
Forum discussions
How to use the Troubleshooting Assistant
Start here · How to navigate the website
Related archive content
Cookies
We use necessary cookies for login and optional analytics to understand site traffic.
Details