Operation CHARM: Car repair manuals for everyone.
Home >> Toyota >> 1989 >> MR2 L4-1587cc 1.6L DOHC SC (4A-GZE) >> Repair and Diagnosis >> Powertrain Management >> Emission Control Systems >> Specifications >> Electrical Specifications
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Electrical Specifications



4A-GE ENGINE (NON SUPERCHARGED)

Base Ignition Timing 10° BTDC At Idle (1)
Advance Ignition Timing
A/T More Than 12° BTDC At Idle (1)
M/T More Than 16° BTDC At Idle (1)

EGR Gas Temperature Sensor Resistance (2)
At 50°C (122°F) 69.4 - 88.5K Ohms
At 100°C (212°F) 11.9 - 14.4K Ohms
At 150°C (302°F) 2.8 - 3.6K Ohms

EGR VSV Resistance 33 - 39 Ohms

OS Heater Resistance
At 20°C (68°F) 5.1 - 6.3 Ohms

1. Refer to adjustment procedure.
2. California Only.



4A-GZE ENGINE (SUPERCHARGED)

Base Ignition Timing 10° BTDC At Idle (1)
Advance Ignition Timing
A/T More Than 12° BTDC At Idle (1)
M/T More Than 16° BTDC At Idle (1)

EGR Gas Temperature Sensor Resistance
At 50°C (122°F) 69.4 - 88.5K Ohms
At 100°C (212°F) 11.9 - 14.4K Ohms
At 150°C (302°F) 2.8 - 3.6K Ohms

EGR VSV Resistance 33 - 39 Ohms

OS Heater Resistance
At 20°C (68°F) 5.1 - 6.3 Ohms

1. Refer to adjustment procedure.

pro multis · About Operation CHARM