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Chapter 1: Electronic Circuit Matrix Chart

ELECTRONIC CIRCUIT MATRIX

Symptom/Suspect Area See
No Up-Shift (A Particular Gear, From 1st to 3rd Gear, Is Not Upshifted)
ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
No up-shift (3rd --> O/D)
1. O/D Main Switch Circuit O/D MAIN SWITCH CIRCUIT 
2. ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
No Down-Shift (O/D --> 3rd)
1. O/D Main Switch Circuit O/D MAIN SWITCH CIRCUIT 
2. ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
No Down-Shift (A Particular Gear, From 3rd to 1st Gear, Is Not Down-Shifted)
1. ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
No Lock-Up Or No Lock-Up Off
1. Stop light switch circuit (1) DTC P0724 BRAKE SWITCH "B" CIRCUIT HIGH 
2. Engine coolant temp. sensor circuit (1) DIAGNOSTIC TROUBLE CODE CHART
3. Throttle position sensor circuit (1) DIAGNOSTIC TROUBLE CODE CHART
4. ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
Shift Point Too High Or Too Low
1. ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
Up Shift To 2nd While In L Position
1. ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
Up-Shift To 3rd While In 2 Position
1. ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
Up-Shift To O/D From 3rd While O/D Main Switch Is OFF
1. O/D Main Switch Circuit O/D MAIN SWITCH CIRCUIT 
2. ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
Up-Shift To O/D From 3rd While Engine Is Cold
1. ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
Harsh Engagement (N --> D)
1. ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
Harsh Engagement (Lock-Up)
1. ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
Harsh Engagement (Any Driving Position)
1. ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
Poor Acceleration
1. ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
Engine Stalls When Starting Off Or Stopping
1. ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
No Kick-Down
1. ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
Malfunction In Shifting
1. Park/Neutral Position Switch Circuit (1) DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) 
2. ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
(1) When The Circuit On Which Mark *1 Is Attached Is A Malfunction, DTC Could Be Output (See DTC CHECK/CLEAR ).